350 sbc comp cams 292h vortec heads engine run. Cam recommendation needed
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- Engine run 350 sbc has a comp cams 292h, stock vortec heads, 9.2 to 1 compression. Ran engine in my 1966 chevy nova 3000lbs with me in it. Th350 torque converter is a tci 3500 stall . 4.56 rear gear. 29x10 hoosier slicks. Best time with this cam is a 7.64 1/8th mile at 90 mph and 12.00 1/4 mile at 112 mph. Looking for a cam recommendation to pick up a few tenths. Post down in comments with cam recommendations. Ls6 valve springs and 787-16 retainers. Will run engine later in the year.
Ya know, as good as it sounds and as responsive as it is on throttle.. What more could you ask for. It is a nice engine as-is that will last you a good while. I'd be happy to have that engine.
Nice thank you.
Stay with the 292 get some head work done and run 1.6 rocker arms trust me
I got sportsman series heads with that cam and 1.6 rocker arms. I plan on running 11 to 1 compression 😎
My own dyno time and flow testing showed a few things consistent when using stock unported vortecs on a hotrod street engine. Decent spring upgrade of course, but no porting. We found they love the valves backup. Some are that way stock but not all. Cam wise exhaust loves 8-10 degrees more duration and about
.020 more lift than intake side. A 106 lsa makes wicked midrange torque. Keep building. Thank you for videos. My go to hotrod cam is a spec of 500 int, 520 exhaust. 238 intake, 246 exhaust. Ground on a 106 lsa usually. We nitride a flat tappet cam and use Rhoads lifters. Our hydraulic rollers are a touch different
Thank you for the comment and good information. I have a vortec engine with a solid flat tappet 240/250@.050 lift on a 106 lsa. I haven't figured out way this engine is a under performer yet.
@nylegreen261 that should run hard. However- the lobe ramp speed is everything. The extremes are very fast and aggressive. They make power but also go flat( they need springs, pressure, stability.). The older lobe designs like comp magnum and isky Mega are a friendlier lobe ramp rate and tolerate mellower springs(like a traditional z28 spring - about 105 closed and 300ish open.
Them vortec heads need to have the spring seats milled down if you gonna go higher lift than around .450". You'll also need beehive springs, and id put a 700 or 750cfm carburetor on with mechanical secondary if you running that cam already in there. Just do the springs no machine work, bigger carb and id run about a 2200-2400 rpm stall converter, beef up some of the internals in the transmission, and id strongly recommend screw in studs for the heads no matter what, and if you decide to run a different cam, id go with a retrofit hydraulic roller cam. Id also switch to an aluminum radiator too. Lighter and Way more efficient, switch to electric fan. I've got an 88 vortec that i put fitech on .125pop up hammers, I studded the 2 bolt block gear drive timing, 2.02 intake, bigger exhaust too, milled spring seats and milled down valve guides, comp cams big mutha thumpr hydraulic roller cam cast iron roller tip rockers, youll need to get tools to measure pushrods if you're switch to retrofit roller cam. I run a 2800 rpm stall converter, 3.90 posi in my 86 c10 long bed, 5500 pounds. Stock size tires. I had to put a spacer under the egr valve because i had to switch to tall valve covers. And a 2 inch spacer under the throttle body to clear the egr im using an edelbrock performer dual plane. 3 inch mandrel bent full dual exhaust no crossover for that radical of a cam. And the headers are 1-3/4" with 3" ball collectors which when clamped to the s pipes takes no gasket, and seals up the best. But do keep checking them once in a while, but still cheaper than flat flanges, and wont rust out and rot away, spend the extra money on headers for the ceramic coated ones though as well. Good luck, oh my compression is around 13:1, i stayed with the 72cc stock heads from American Cylinder Heads in Oakland CA, Arvid is the owner, he'll set your heads up however you want them, just give him the specs for the cam and send whatever springs and keepers you want and he'll send em home assembled. Again good luck bro.
Nice thank you for the information.
With all the defective cam and lifter sets floating around in the market right now, your probably better off just sticking with what's already in it, or convert it to roller cam unfortunately.
No problems so far. I usually follow the same guidelines, break in oil, a additive, and u.s.a made.
I second the hydraulic roller. Unless it a rpm monster I'd go solid lift/ roller then. hydraulic Flat tappet kits aren't what they use to be.
Yes I'm looking into roller cam options. Thank you.
@briang4470 roller cams are suffering failures too. There is no safe cam swap. Unfortunately these days if you want to play, you have to roll the dice.
@@prestonrieger8410 yes they can fail, but to be fair usually a roller lifter will usually give you a warning (usually lifter tick) before failure and if caught quickly can be repaired simply by replacing the lifters with no other damage sustained, with a flat tappet once you hear the dreaded lifter tick, it's game over, the cam and lifter have now thrown fine metal debris all through the engine and now your whole build has to start over. Personally I don't recommend swapping cams anymore unless absolutely necessary because pretty much all new parts today are garbage.
Put flat top pistons in it man u have the best cam possible vortec heads glow best at 500 lift bump the compression up
I've used a comp oval track cam I think they call it ah286_8 it's just under .5 lift 236@05, and 244 ex. 108lsa, seems to work good with vortecs and flat too pistons. Also being a circle track cam insnt super aggressive on the ramp rate, so press in studs on those have held up on budget beaters for me. They do idle ruff tho
I might do it. I have one sitting on the shelf ready to go.
I've used those cams in a few projects and they seem to work good, similar to the 292h but probably more torque and bit more power overall. I think the timing on it would suit your lower compression better to @@nylegreen261
They all sound choppy and rev quick with just a flex plate. Add a converter or flywheel and all that changes.
Just going from a 110 to a 108 lsa will probably pick up 20 ft lb in the mid range...
Same here. I prefer 108 lsa as well. 👍
That would be an improvement.
Look into comp cam extreme marine cam I ran one in a 350 with flotek heads in a g body and ran 11.80s best flat tappet hyd cam I've found
Love your channel,, Wish we could get together and do a project, or go racing
12 flat with what you have me thinks someones trollin commenters...and doing a good job at that lol
Good running car.
Nice thank you
Edelbrock 7102..didnt hear if you did anything to your heads,your limited on your lift with the vortecs
That motor sounds very good, sounds milder than I thought it would but very nice, very respectable numbers in the quarter mile. as well. I dont have a camshaft recommendation was just enjoying the video, I just bought the comp magnum 286h for my little Back Yard Coupe, a scratch built hot rod, it has a 290 hp crate with dart heads, other than trying to pick up a little more with a cam swap, do you like the comp 292h ? thanks for posting the video.
Yes the 292h worked out well. It had more mid range then I expected. I might not find a flat tappet camshaft that picks up that much in that rpm range. Thank you.
I would change the heads instead. I have always run Comp Cams. That’s a good cam.
What was your break in procedure? I hear all the issues with cams nowadays.
Motor sounds great. Good ETs.
Thank you. Break was a 20 minute run with rpms beeteen 2000 to 2500 rpms. Lucas break in oil 30 wt. Closed spring pressure 110 to 120 and open pressure was around 290. No problems.
@@nylegreen261 Thanks. You hear all the issues with cams lately and makes you hesitant.
I have a Comp Cams 274H Extreme sitting on the bench ready for installation.
That engine is very responsive! Do you have light springs in the distributor? Those 170cc Vortec heads are a lot snappier than the ported 200cc Dart II heads my friend had on his Nova.
Nice! No just a stock msd hei street fire distributor.
Lunati Voodoo 268/272 HR, wicked and stomps COMP.
Nice I will look into it.
Hiya nyle. I ran many vortecs with comps extreme 284. Cam timing varied from +2 up to +6. Just depended on what cranking pressure i was after. I always liked about 185psi with iron heads on CA 91 octane.
Nice thanks Pat. That is the cam I wanted to run. I found a deal on a erson cam with 244@.050 on both sides on a 108 L.S. I might run this. I will check the intake centerlines.
@nylegreen261 yes absolutely. The vortecs will love the tighter lsa. 350 cid hotrod stuff loves 106. Comp likes 110. I had some extreme 284's custom ground on 106 with all other specs identical. We saw 35+ torque gain through the curve. But if your running a very loose converter then no sense worrying about torque at 3500. Also ran a dual plain rpm airgap and shifted anywhere from 6200-6700.
@nylegreen261 nice cam specs. If you can put 1.6 on exhaust. Exhaust side is vortec weak point. Resist porting. Vortecs react much different to porting. It's very easy to hurt them with porting.
Are you willing to run a solid lifter camshaft ? However I still feel theres more to be had with a good lightweight 8” torque converter than a camshaft swap at this moment.
No problem on a solid lifter cam. Im looking for a better converter for the th350.
@@nylegreen261 i would take a look at Howards 110812-06 camshaft for this engine
I like it 252/262 on a 106 lobe separation
I would keep the camshaft that you already have. Just buy a set of Brodix IK (Iron Killer) heads Part #1021005 These are 64cc combustion chambers so that would bring up your compression ratio, and with aluminum heads you have more wiggle room for ignition timing because ⚗ dissipates heat faster the intake volume is 180cc. Head gasket should be the Felpro 1003. You wiould basically bolting on 50 to 60 horsepower with these cylinder heads.
Nice I like that direction. It would definitely make more power. Im going to keep the long block together. It is really budget engine with 700.00 in the long block. I was just thinking I could get a few tenths with a couple hundred dollar camshaft. Thank you.
@@nylegreen261 Shave the current heads you have now for higher compression. Go with an electric water pump, double check your AFR ,and play with and advance curve kit for your HEI.
I'm heading in that direction. I just installed a afr gauge. Thanks again
I would go with around the same lobe lift and duration with maybe a tighter lsa. But that's just me. I'm far from an expert.
I think that is the direction I'm going to go. Thank you.
What temp does it run on a 15-20 mins drive?
I was able to keep under 200 degrees
Put a stage 2 cam in it
The engine pro stage 2 looks decent. Thank you
Put a better set of heads on it
Flat top or dish pistons?
13 cc dished
@@nylegreen261 xe256h lol
Careful timing, 25 to 30
@@nylegreen261 I know, it won't lope. But your gonna make over 400 foot pounds of torque, vs less than 350. Be much, much happier.
Lol I get i just haven't figured out how to make a shorter duration cam run decent in the 1/4 mile. The trend im seeing is the earlier the icl and the more over lap the faster the low compression motors go.
Isky 292 mega or isky 280 mega both on a 108 lsa. Your current cam has 72° of overlap. The isky 292 has 76°. I'd be more interested in seeing the 280 mega cam because of your compression ratio. The 280 has 64° of overlap in case your wondering. Either way it should be installed at 104°. Thanks for the content!
I like it. I will be making a decision on a cam change in a couple of months. Should be testing by fall.
Saweeet!
The Elign cam is your cam. I would look no further. A 108 lsa is perfect for a 350. Just tightening your lsa will give you more torque and HP by at least 30 on both. Whatever you do don't let anyone talk you into a wider lsa than 108. Only other thing I would do is change to screw in studs. Check into having cam nitride hardened and get a really good set of lifters.
Yes I'm liking this direction.
Definitely a tighter lsa. Also go with a dual pattern style camshaft. Look at some of the lower lift circle track cams out there.
@@nylegreen261 The only thing I dont like about tight lsa with splits (esp larger ones) is you can blow the intake charge straight out the exhaust valve. Extends the powerband some but if youre only shifting at 6500 Ill go out on a limb and say single pattern you dont need to extend your powerband to justify a huge split...or 4 deg splt. Best to call some old mfrs as posted..crower or Isky. They got some killer grinds in that would work great with those heads. Right now thats your weak spot
Garee...many dont know Elgin makes some killer profiles .
Only time Id use a wider lsa is on a mild driver where you really need manners, idling for long periods in traffic etc
But for brute power tight is right!
Great input- I said similiar. You are spot on. We did alot of cam testing. Vortecs love 106. Love it.
Going with a solid lifter cam will make more power. Like the Comp Cam 294S would be a step up.
Fits the rpm power band 3500 to 6500 im looking for.. Nice thank you for recommendation.
Sounds amazing!! I had an '85 Grand Prix with a built 327 in it with this same cam. I miss that car.
Nice I like those G bodies. Thank you.
You need a 106-108 LSA for it to really do what it needs to do.
Bingo.
Have you tried rocker arm ratios and the best rocker for your geometry with best average ratio? Do you have tight quench clearance and flat top pistons? You have room to raise that compression ratio. A 292H loves 9.5:1 through 11:1 static compression ratio that is where magic happens, however pump gas may have issues with your stock iron casting heads. To raise power and or cylinder pressure with a cam, you could get a solid flat tappet or solid roller cam. Changing a cam could upset your balance with those heads as the lift is not too much and the duration revs fair while keeping just enough cylinder pressure with your 9.2:1 static compression ratio for the 3000 lbs. moving. Try an XR282HR and XR288HR, really those like compression also. i am like them with 10.5:1 or more. See what is great, the weight is 3000 lbs. if the bottom end was a flat top 383 that would raise your compression and detonation resistance in your 3000 pounder. However if more cam is added and it loses some cylinder pressure you have give and take and upsetting of the averages and your car setup gearing etc. and then could run the same time or worse. So compression is insurance that you shall not lose anything. You need flat tops or a very small massaged rounded edge dome as to not interfere with flame front at these specific rpms and type engine build. So if you make gains you couldn't complain if it is slower. However if you lose And it is slower then it is to blame. Really it comes down to all the hard work you have done with this and a 12 flat is quite impressive for stock vortec heads and 9.2:1 actual static compression. Right now at 9.23:1 you are getting 6.89:1 dynamic. You Need 10:1 static for 7.5:1 dynamic. The minimal performance build's dynamic compression ratio. However your car is 3Klbs. so, it is just so mind boggling that everyone's cars are too heavy and that your's runs great. It is just those splitting hairs from 12's to 11's that make this so fun. That is how i am know that all street cars should run 12 flat consistently. lol cheers matey!
Nuthn beats cubic inches, stroke it.
I have a 355 with a Howards cam and lifter kit part.........
# MC 110961-08 Advertised intake/ ehaust 285-285....... Duration at 050 intake/ ehaust 231-231 lobe separation 108. I picked up 30 lb-ft at the wheels of my 74 Nova. I would stick with a lobe separation of 108. You should pick up 25 to 30 lb-ft over what you are running right now. Take care my friend and have fun.👍
The math says you're only making about 325 horsepower. Have you leaked the engine to see how the rings are sealing? What viscosity oil are you using? Are you using a stock oil pump?
For a drag car with an automatic transmission, I suspect that you would do better with an LSA closer to 106 degrees and roughly 10 degrees more duration, but the cam manufacturers would be able to better advise you. The heads, however, are REALLY holding you back. You may have as much as 100 horsepower to gain with good heads.
What size exhaust header primary diameter? Typical cheap 1-5/8" headers aren't enough.
20w-50 oil. The shortblock is out of 80 malibu with new rings. M55 hv oil pump. I do like the vortec heads. 325 horsepower is observed is good. I think my tune was off. I do like your cam idea. I do have a set dart 200 heads I could try.
@nylegreen261 Put a stock oil pump on it, and use normal 10W-30, 5W-30, 10W-40, or 5W-40. In theory, it may make more power with 0-weight oil, but if you're using hydraulic lifters, you might have bleed-down issues.
I'm putting together a little 383 with vortec heads and was planning on going with a Howards 225/233 duration 525/530 lift cam. Might be a little much for those heads, but I hope to swap those out later. Really neat videos. Edit: Roller cam in factory roller block...
Nice I have been impressed with vortec heads so far. Nice build.
@@nylegreen261 me too since early 2000s...had sum on a 90 silverado
13.6 with the factory tbi.
268 with 114 lsa 222/226 @ 50
Nice that truck runs strong. Im thinking about adding vortec heads to my 77 c20. It currently runs in the high 17's with a stock 350.
@@nylegreen261 u should!!!!
@@nylegreen261 all my specs were lt1 specs
On the 355....lt1 clone 93 to 97.
Honestly, that cam should take you down in the mid 11s with that setup. I went 11.40s with that cam in a 3050lb 68 camaro 20+ years ago, 355 pocket ported 186 fuelie heads which are about same flow as stock vortec heads. My engine did have lil more compression tho but not much more. Was like 10.5:1. I swapped the old fuelies out with trick flow 195cc runner heads and it went 11.teens, out the box. Same cam. I dont think you have a cam issue.
Nice that car runs good. Im hoping to make progress with e.t. I agree mid 11's is achievable.
I’d drop that thing in something and have fun!!!!
That engine did run good. It is still together. I need a 80 malibu to put it in.
That motor sounds really good. Maybe you can take a look at the bracket master 2 . For the spec's you mentioned that should fit right around that rpm range you want.
Nice I will look into that cam.
@robertbanks6870 those 305 heads need ludicrous amounts of work to move any air...almost nobody will port stock iron today either. Maybe a machinist can throw parts n time at em but not worth it outside that
isky 302 h 535 lift 112 center line
Not a bad choice. I like it.
I think the compression is not right on your build stock vortec 350's come 9.5-1 from the factory summit sells a set of Hyputectic 4valve reliefe performance pistons. with the 64cc chamber vortex heads compression will be at 9.6-1
Hey im not too knowledgeable in what parts are good and what parts are not but im building a 350 chev for my holden hq wagon and i wanted to put this cam in it as i love how it sounds and from what ive read its a good cam for a 350 but is it a good combo in a relatively stock engine? and would i be able to comfortably run it with the same setup as you with the new springs? (Im fully taking the engine apart most likely honing it with new pistons same con-rods but mostly stock)
I have had great luck with this cam and vortec heads. Im not sure how it would respond with lower compression and different heads. What 350 sbc do you have. Do you know what casting number heads?
@@nylegreen261 ill have to have a look but im also running a th400 3 speed. What stall did u use? (Sorry for so many questions)
@@hellbenthq512 I used a 3000 stall for testing. It worked well.
The 292h is a little too much cam for a 9.2: compression engine. its over cammed and you are losing power down low and in the mid-range, but not spinning it fast enough on the high end to take advantage of that big of a duration. it really needs about 1 - 1.5 more points of compression for that much cam. also, once you get beyond about 9.7 with iron heads you can run in to detonation. so this engine combo does not make sense to me. there just is not enough compression to take advantage of that big of a cam. I would look at something a little smaller in cam size. like one of the David Vizard grinds that Lunati offers, like the DV278-06HRH or DV282-08HRH Hydraulic Roller. A roller cam will give you more area under the curve and will fill the cylinders better with Vortech heads. also, that cam is on a 108 LSA to take better advantage of exhaust scavenging and 350s like a 108 LSA. however, a 108 LSA will make the rpm range between peak torque and peak horsepower narrower. where spreading the LSA to 110 or 112 will widen the range between the torque and horsepower peaks. so, it really depends on why you're a looking to accomplish. if all you plan to do is drag race it, then the DV282-08HRH is what i would run. its 231/231 duration at .050. and .535 lift with 1.5:1 rocker. however, i would have the heads worked over to make sure you have .600 valve retainer clearance on the vortex heads and run a 1.6 ratio rocker. which puts the lift at around .571 and have them upgraded for screw in studs. you are living on borrowed time with push in studs in a vortec head. running higher ratio rockers makes the everything happen faster as far a valve events go. they are worth about 5-10hp over 1.5 ratio rockers. 3000 lbs. is fairly light for a car, i think the stall on the converter is a little bit too high as well. i would be running in the 2500stall with a car that light and 4.56 gears.
also 50 shot of vitamin N will give you what you're looking for with our changing the cam, just re-gap the top rings. recommended ring gap is .004 - .0045 x Bore Diameter, so most stock bore 350's have ring gaps around .016 - .018. i would gap them to .020-.022 if i was running NO2. but be careful of NO2, that stuff is addicting. you will keep wanting more and more and suddenly you are at a 250 shot and things start breaking or melting. most factory bottom ends are strong enough for a 100-125 shot with stock cast pistons. anything more than that and i would want forged pistons.
Nice alot of information here thank you.
@nylegreen261 I disagree on that compression/cam/converter "advice".
It will not make more power with a smaller cam.
The 9.2:1 static compression ratio is not your major issue. Countless low compression NHRA Super Stockers make LOTS of power with wild cams- they just don't make much low-rpm torque- but for a drag car, who cares about low rpm torque- as long as you can get up on the converter, you're good.
And a 3,500 rpm "stall speed" may be okay for a street car, but you're probably leaving five tenths on the table, by not running an 8" converter with a "stall speed" of around 5,000 rpm..
@@DortonFarb yes I think a windage tray, and good converter would put me in the 11.40's. I think it would be fine on 87 octane
@nylegreen261 The lowest octane you can run, without pulling timing, will give you the most horsepower, and therefore the highest quarter-mile terminal velocity. From there, your ET is a measure of your ability to make the most efficient use of that mph.
Spilt duration vortec heads love split duration
Nice agreed still looking into the next cam. I do think a comp 292h vs 292 mega cam would be a interesting comparison.
248/252 108lsa 105ica (three degrees advanced) .500+ lift. Find a cam as close to these specs as you can and she’ll run like a scalded ape
Pull the stock rocker studs and put 7/16 rockers studs and big block rockers and stick with that cam should give .60 ths more lift and go faster
Ya just whipped out a new comp cam and lifters at a 15 min breake in time
It is ready to go next time around.
@@nylegreen261 going to a roller
@@tj484I like that direction. I'm just waiting for the right deal to come along. I have enough in the works to keep me busy. The video was to help me get some ideas on my next move with the engine. Thank you.
What kind of exhaust are those?
3 inch warlocks
I haven't built an engine in a few years I don't know the cam market like that anymore, but I would say have the heads shaved and tapped for screw in studs. I've had press ins fail on me, and my little 4.8 has aftermarket heads on it the bump from 9.1:1 to 10.1:1 made a huge difference.
Not a bad idea.
292 a little too big for how the heads flow I would say something about 224 at 50 108 lsa keep the same Lift. Maybe throw about 6° duration more in the exhaust side. Straight up.
I wish you the best luck but I got a bad feeling you go end up having head problems. Pressed in studs are never a good thing with a cam that size. I've had a couple of buddies try this and swear up and down better run just fine until it doesn't and then it cost them a pile of money to fix it later on down the road. Anytime I build one now I run the big block screw in studs with oversized valve springs. The hey man you do you
In the past I had great luck with comp cams 286h in a 350 with sportsman II heads, but I found my best et's shifting at 6800.
Your 292 will probably get better times shifting at a higher rpm.
Unfortunately I have a stock shortblock. I cringe going to 6500 rpm. I will shelf that cam for awhile and revisit in the future. Thank you.
The 292 maga😂
LT4 hot cam, .525 lift, and you can also bolt in some 1.6 rockers.
I like that cam. Ran one before stock sound and good performance.
I wouldn't change the cam. I'll send you info for a guy who can build you a carb to get you more out of that motor. Some tuning can get you there.
What kind of mufflers? They sound magnificent!!!!
I would like to know the answer to that also. I love the sound
What camshaft is that
Comp cams 292h 244@.050 lift .501 lift
What ET are you running with the setup? ..i done s 327 with the exact same setup that you have except for the cam ...i ran a lunati bracket master 2 cam ..515 lift on int and exh...108 lobe sep.... and 240degrees of duration at 50 and it ran 7.60 in the 1/8th mile...i also built 350 that was 40 over with flat 2valve relief piston and the exact same cam that you are running but I had 186 casting heads ported with 1.94 and 1.5 valve and a victor intake in a 72 nova 4000 converter and 350 trans and 410 gear and I ran 7.01 in 1/8th at 94 MPH.... you have a good setup on your engine...you have got to have a good converter to get the car to leave to get the good ETS... IV seen a lot of people run bad numbers with engines that should go really fast and it be because of the converter not letting the car get a good 60 foot time
Nice thank you for the input. With a not so good 3000 stall it went a 7.64 1/8th mile. I will upgrade when I can find a good deal on a 8 inch converter.
I would at least have a 10.1 compression!
What you get the transmission out of ,did you rebuild it
ADD SOME NOS.. CHEAPEST.... GO ROLLER GAIN 50 MORE HORSES
I run lanati in most of my vehicles
Not a bad choice of cams. Had a lunati before 276/284 @ .050. Cam worked well in a 355.
@@nylegreen261 the lunati 20120316 would work
234/242
530/530 lift 110/104
It's a hydro roller.
With those springs and the way those heads breathe that's what you should have did.
And put an rpm air gap on it if you're only gonna turn to 6500. That's what this can is designed to do
In an engine that you don’t want to rev past 6300-6500 max, stock bottom end, fairly low compression, you’d probably see a hair better numbers on your time slip if you called comp cams, and special order the comp 280h it’s 230@ 0.050” .480 lift, but order it on 108* LSA and have it hardened, and of course get the kit with the lifters. Make sure to degree the cam when you install it. With factory vortec heads, I’d probably install the cam on 104* intake center line, so it would be 4* advanced, to make as much torque through the mid range as possible. An RPM airgap intake with a 1” tapered combo spacer topped with a 750 double pumper, should run pretty darn strong for a stock rotating assembly. I used that combination in a gmc Jimmy mud truck for years until it broke a piston ring. It ran a lot harder than it should have and took a ton of abuse. Including a 7500 rpm stint due to the throttle cable fraying and hanging the throttle WFO.
Nice cam pick. Did that jimmy have a stock rotating assembly. Looking at the pistons in this engine they look like they would be the first thing to fail.
@@nylegreen261 yes it was a gm goodwrench shortblock stock crank, rods, and lame stock dished pistons. It did eventually break a piston ring, which resulted in breaking the top ring land of the #6 piston, After about 12 years of abuse
Nice impressive
Metal shim head gasket's get you another.5 point tight "n up lsa with those iron head's 106-108 that help bring cylinder pressure up
He said in the video that he was running the 1094 shim gasket
Yes I have the 1094 head gasket. Im leaning towards a a tighter lsa and a earlier intake centerline.
What size exhaust and tailpipe?
If you go to the street racing channel Bill gave his cam degree card what specs were on his camshaft and his 421 small block that's a nice camshaft Bill Hoskins
Thanks
You want more, that can is a great cam but needs more compression,and stock bottom I wouldn't mess with 6500 stick with 55-5800, 3500 stall is what comp says,I had the same cam in my Pontiac
also half turn pre load on the lifters
I would get some aluminum heads , that's a big intake for that cam if you want higher rpms go roller hydraulic or solid
Thank you
I’m running the 305h in the same motor with ported Vortec heads it likes rpm in the 6200-6900 rpm still stock Chevy bottom
That is awesome. Im scared to rev it over 6500 rpm's. I feel a little better now. Do you still have stock rod bolts. I would like to see if there is a difference with the 305h vs the 292h in my setup.
With that high lift cam I sure would go with long slot rockers and slightly longer pushrods ----that is --for max lift at your estimated 6500 rpm's. Good motor bud !!!!!! Jim Kiesau
Nice thank you
You probably already picked your cam by now but my pick is one of the comps thumpr series cams because of your low C.R. They have a 107lsa and I would run a solid lifter and a higher ratio rocker depending on how much lift your vortec heads can take. I use the Thumpr cams and they pull hard but you have to increase the lift, that's their Achilles heel.
I wouldn't mind trying that. Still looking for a cam. Waiting for a deal.
306S cam would definitely pick your engine up from that cam
I would like to try one out for sure.
Someone may have already said this but, that cam loves nitrous, you can safely run a 150 shot on that long block with proper fuel and timing and you won't need to rev the engine up any higher to get where you want to be. I ran that cam on a sbe 350, 2bolt main, cast crank, cast pistons in a 79 Z28 daily driver and it drank bottle after bottle with no issues. When I pulled the ported 882`s put the AFR 190`s on there it really, really woke up. Really fun to spray your way to your goals and not take away driveability.
Nice thanks for the input.
280 out pulled the 292... stock vortec long block even springs with performer rpm intake everything else the same not sure why... I'd leave it as is but definitely wouldn't go bigger
Nice thanks for the input. Im up in the air on which direction to go.
How are u running a 292 cam with stock heads??? Always been told stock vortecs could only hold .450 lift before having to have machine work for springs. Great sound little mouse
Thank you. With the ls6 valve spring, stock locks, 787-16 retainers. I have around .040 valve seal to retainer clearance with this cam. It helps that the stock rockers aren't a true 1.5 ratio.
@@nylegreen261 thata pretty awesome. Thank you for the information. Been wanting to do a bigger cam swap for a stock 350 but felt really limited on the cam due to lift issues. Ty again and keep pumpin it out! God bless
You should look at the videos from piss cutter performance. Vortex heads can only flow so much and you can easily over cam the engine. He has a video on what the max lift you can run. I cant remeber the exact lift he says.
Yes I have put that into consideration. I want to try a 1.6 ratio rocker to see what happens .
Good to know the stock press in studs are holding up on the vortecs i have a 358 with stock Vortecs going to install a .450 lift 235/239 @50 106 circle track cam . supposably the circle track cams have faster ramp rates .. hopefully it will survive a good while lol. I should of went more lift now that i see you running 500 lift
I have used the vortecs heads for a few years. I dont use higher than a 350 open pressure and limit rpms to 7000. No problems so far.
Hydraulic roller cam all I can say
I'd spend about 20 hours on each head with some porting. And tune the carb the best you can. Maybe give the cam a couple more degrees, see what works.
I like it. Im a little hesitant with the porting of the vortec heads. I will have to do some research and give it a try. I would like to do a before and after to see the difference.
I THINK YOU HAVE A GOOD SETUP THERE I WOULDNT CHANGE CAM BECAAUSE OF THE LOWER COMPRESSION, I WOULD TRY TO LIGHTEN THE CAR SOME AND MAYBE TRY 1.6 ROCKER ON THE INTAKE SIDE, GREAT VIDEO MAN THANK YOU
Will consider thank you.
You may want to raise compression...
That cam may be a little too much for "stock" vortec's...
I would like to change the cam to improve performance. It has a best pass of 7.64 1/8 mile and 12.00 in the 1/4 mile as is.
I run a crane cam 282h06 in my 355 my compression is 9.9-1 i have the summit Hypertectic pistons 4 valve relief and a set of Gm performance GMPP Fast Burn heads there 62cc thats why my compression is 9.9-1 but i think with your combo you can try comp cam extreme 268
Not bad. I bet that motor runs good.
@@nylegreen261 hell yeah I love it
Needs more compression!
Small roller, 108 LSA
long slot rockers needed
Try lt1 hot cam
Hey nyle, when running this cam did you have to machine the guides down and install screw in studs?
No. Im running ls6 valve springs, 787-16 retainers and stock valve locks. I haven't had any issues running the pressed in studs. I would start to get nervous above 350 open pressure and 7000 rpm's.
@nylegreen261 awesome going to gather parts to do this swap on my 56 chevy. I have a comp 292h laying around that has like 5 mins run time on it and new howards direct lube lifters that should work well.
Seems a little down on compression to expect too much out of it unless you want to put a power adder on. If you dont want to throw out a bunch of money you can go in and clean up the ports in the heads (I went in and gasket matched and ported and polished an old set of 64cc double hump heads and it made a big difference back in the day), maybe play with cam timing or add a 2” spacer under the carb seemed to help my situation some. Theres plenty more you could play with including suspension. All these little things helped me just thought Id throw it your way
I like the idea of moving around cam timing. Lots of good ideas here thank you.
@@nylegreen261 No problem man I hope some of this helps you as it did me👍
I hope I'm not too late on the cam suggestion. Isky 201536 would be my choice. 274/278 adv. 246/250 @.050 106 lsa .535/.545. Will improve dynamic compression 0.7 over the Comp 292 and carry power further past peak with the longer exhaust duration. Like some others have said, vortecs like dual-pattern cams. especially the 906s. If your are going to keep running the stock rockers, your real world lift likely won't be much over .500.
Nice choice. I will have to look into that. Those lobes look fast. Is that a circle track cam.
@@nylegreen261 Isky lables it "oval track". You can drive in whatever shape you want to. ha ha. Who cares what they call it? It's about the perfect performance cam for your combo. There is a reason for the 106 lsa. There is a formula that takes cubic inches and intake valve size and spits out the ideal lsa. In your case, the formula spits out 107.4, but since your compression is on the low side and rocker ratio is likely sub 1.5, it's best to round down. Check piston-to-valve clearance!
@@andysteele4056 No problem on the cam label. I have run a few circle track cams. They seem to be the only ones you can get on tighter l.s. angles. Thanks for the input.
A 280/480
Whats your best e.t. out that motor and what gear and stall
Best e.t is a 7.64 1/8 th mile and 12.00 1/4. I use a tci 3500 stall and have a 4.56 gear.
A xe 274 cam would be good for that motor
Not a bad choice.
280 xfi
Perform rpm intake !
Nice choice
I’m trying an xs274s cam in mine.
That is good choice 236/242 on a 110 l.s..501 lift .510 lift. I almost got my hands on one of those for a good deal.
Do a 383 will gain 11 hp for cheap
I have a 408 with vortec heads coming up in the next month. I will test in my car to see the power difference.
@@nylegreen261 please post how tht 408 runs with the vortec heads 🙏 cause I have a 400 stock block tht ima build all out. But I have thought about trying the vortec heads on the 406 or 408 but put the bigger .202 valves n them.
Maybe an isky 292 mega or similar due to the tighter lsa, but given your constraints, I feel like you're about as big as you'd want to go already. I have a 280 mega under vortecs with the same spring and retainer setup, and I'm pretty pleased. Its in a 4000 pound truck with a stick though, so not a great comparison. It runs strong from 3000-6000 or so, feels like it has a strong mid range.
I'm looking into 292 isky thanks.
@@nylegreen261 The Isky stuff is extremely high quality and still all USA made. I've never seen an Isky go flat.
Nice thank you
@@johnl4756 None of mine did, love the Mega cam and Z series pieces they just work.
Man this sweetest can be 😂 love it
Thank you
Motor sounds healthy
Thanks. That engine ran good in the car.
What mufflers are those?
3 inch warlocks
Put 1.6 on intake
I'm looking into to getting some 1.6 rockers for testing.
Do the LS swap mod.
I would like to get my hands on a few ls motors. It just don't see the deals as I do with the sbc's.
@@nylegreen261 People in my area are asking the same amount for a SBC as they are an LS.
If you got those springs in it
Go hydro roller. Theres a cam from lunati. Street master family of cams they sell
234/242 duration .530/530 110/104
Thats a 2500-6500 cam and would need a 3000 stall and at least 3.73s in the rear
Lunati 20120316 is the part number and use morel lifters
That cam looks like a good one.