Small Block Chevy 400 MAXED on the Dyno - Velocity Stack Tested
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Thanks to all our patient Chevrolet fans who have waited so long for this one.. and the one to come after this one. The Mopar master is putting on a bowtie today, in Nick's Garage. - ยานยนต์และพาหนะ
Yes, I agree with all you guys. But then again, who drives a car with a velocity stack on their engines, very rare.
Yes... we'd put a scoop on top of the stack... LOL!
Lol, the only 1 i know that drives around with a velocity stack is david freiburger. Anyhoo, its awesome that you find the time to respond to our monday morning quarterbacking comments. You and your videos are great! Keepem comin and i hope you find a way to makeup for lost sleep.
This is true not vary many.
The stacks seem more of something from past, and yes you right, hardly no one runs them, HOWEVER, nothing looks better than a 55 chevy gasser with two 4's with velocity stacks (any gasser) .
the worst were those velocity stacks with a foam filter & retainer screen, they were horseshit, same for those awful triangular foam filters, clean or dirty they always messed up my motor's performance
Shouldn't the stud bracket be parallel to the body of the carb not diagonally across the ports ? Maby it was inhibiting the flow? GREAT GUY GREAT CREW GREAT CHANNEL! ps love the IROC !
ditto and the stack makes the carb need to rejet richer
i would thin that bracket out some too along with being parallel just sayin
@@chuckfults9256 Thought the same thing! Should remove the bar and weld it in vertical with a tube welded in the center for the stud. But at a minimum I would have tried to line it up between the barrels. Looks like its covering the rear left and front right.
maybe 2 clips on the outside to clamp to the air horn lip?
I noticed that too. I don't think velocity stacks do anything for a static engine. For them to work there has to be air flowing across the top of the stack. Nick should make one more pull with a high velocity fan on a stand in front of the engine to simulate the engine in a moving car and sticking out of the hood.
Love my 400 SBC. Ever since dad bought a 71 kingswood with one. It ruined me for 350s. Ive had to put a 400 in every car Ive owned. On my 4th 72 Chevelle Malibu.
Hey Nick, thanks for thinking of us Chevy guys. Love your channel!!
We don’t discriminate, here at Nick’s Garage.
@@NicksGaragewhat is that set, & what will be the best supercharger for this engine also,Building a 400 for S10.. looking for some expert advice. Spend hard earned money so be honest. I love that about your show
I ran a 400 small block in my last race car....bored out to make it a 406 ci....bow tie heads and bow tie intake...made over 400 hp
...won 3 features with it!
I’ll bet that the mounting assembly (tie bar) inside the velocity stack is causing turbulence.
It was sitting right over the venturi on primary and secondary interrupting airflow signal at the booster. I'd like to see a retest before I'm convinced.
yeah i reckon it should be aligned better before saying it doesnt work.
It’s not just the alignment of the tie bar, it’s that it’s there at all.
Exactly!! We used to race motorcycle with stack held on with a hose clamp. It worked great.
Had a 63 Impala SS back in my wild days with a 400 SB. I really loved that combo
Glad to see someone finally running a 400sb. Keep up with videos I enjoy them.
As usual, I'm giving a thumbs up before watching the video. They are all great! This is one of the very few things I look forward to on Monday mornings. :-)
I’ve been a GM guy most of my adult life. But I must admit it’s hard to beat the sound of a big block Mopar running at high RPM.
I'd say 28° is pretty conservative on the timing, even on pump gas. I'll bet there is a bit more power to be had there. The majority of SBC's I've messed with did well in the 32 to 36° range, but obviously it depends on a lot of variables.
Man he's missing 50 hp bu only running 28 small chevys likes 36 to 38 degrees of timing unless using vortex heads
Lol...im sure you know way more than this guy! Heck your probably chief tech on John Force team
I run at 32° on my 406 in an 82 Elky.
Yep, my 383 stroker and 350’s all like 32 to 36
@@waynewilliams5802 its not that he knows more....
its that this is common knowledge...
.
its like you saying "wow, you must be smarter than NASA"
when someone says "the sky is blue"
That one Bad 400 ci sounds great love them SBC 400 s keep up the good work nice 😁
475hp smallblock is really impressive. Was this engine running on regular fuel? Wondering what the compression is? Seems like it was wanting more rpm.
400's aren't rev animals.
@@nokoolaid nope not with a 2 bolt main. Have you seen the Ford 351M400 that made 568hp and 550 tq ? Bad SOB
@@deborahchesser7375 No, I wasn't a ford fan back in the day. Now it doesn't matter so much. Cars have become more homogenized, especially GM. Lots of folks are putting LS engines in everything. It's not interesting anymore.
@@nokoolaid ...yeah I'm with you on that James. I miss the day when GM had 5 divisions of different cars with different engines. Now you can spend $100 Grand on a Cadillac Escalade and it has a friggin Chevy engine. I remember the Ram Air Pontiacs, the Buick Stage 1 and the Olds W-30...plus they all had different 350's.
@@deborahchesser7375 My 2 bolt 400 bored .30 over, a bigLunati cam, ported aluminum heads revved past 7000 multiple times. My dyno numbers were 490 hp and 491 tq. It could have handled more build. Those 2 bolts are stronger than people give credit. Us you can put splayed 4 bolt caps on a 2 bolt. Just drill & tap.
...index that velocity stack so that the cross bar isn't creating turbulence over the two venturis that it was covering in the video...
Par. We will be more careful to line it up next time.
Test velocity stack w/o hold down bar covering 2 carb venturis. Hold down parallel or perpendicular not diagonal covering 2 carb venturis.
Thank you Jerry. I'm surprised it didn't lose more HP than it did.
a flat bar located above the high speed bleeds on the primaries generates a lot of turbulence. It also affects flow thru the boosters. this is enough right here to drop the power down to what was experienced on both tests. personally I think this was the cause of the problem and not the stack itself.
Another awesome video guys!!
Orient the velocity stack so that the bar in side does not cross over the venturies. Line it up to go across from left to right.
Always look forward to New videos ! You guys Rock ! 400 SB Oh yeah .
I Love That SB 400 Chevy 😮😮😳😊😀😊👨🏼🔧
28 degrees timing?? throw some timing at it.
That thing sounded ANGRY at first fire up.
did you have the velocity stack on correct?? I noticed the bar that holds it down was running right across the top of 2 of the ventures?? I think it should be run at a right angle so it is not blocking/covering the ventures-Just a thought???
ksauto. My mistake.
This might be a bit off key, but how about a 500 Caddy do-up
Just a thought.
All that displacement in a motor weighing not a whole lot more than a 350.
@Dave Micolichek A bone stock 500 Caddy with the 429 heads becomes an instant monster and does NOT require a lot of money. One of the popular rags did this to a Chevette with a 2000 dollar budget and ran low 11's right off.
The velocity stack needs to be exposed to moving air while the car is moving. The stack creates a low pressure zone scaled to vehicle speed. This forces air down the carb. If the vehicle is not moving such as in a dyno room, then nothing gained.
Smiley. Thanks for the info.
I ran a lot of 400 sb’s on the street. A good cam and four barrel- you could smoke some ass with that motor. They are very strong.
have one in my aunts (rip) 68 impala 2 door.... keeps up with my dads 440 72 satellite for the first block....
then bought a 77 pickup i was told had a 305.... stock 400 to the truck is what it turned out to be
LOVE that 400 in that 700
the 68 is a little cranky for a daily.... but that stocker is a WORK HORSE.... pulls hard and at low rpm
I’ve seen a 69’ Firebird convertible with one of these engines run like a scalded ape. They’re no joke for a small block if built right.
Jb 1 small block weight with big block power!
used to stroke these to 421s they would run 10s all motor with proper setup
If you go with longer rods, such as 5.7 or 6.0 it turns into a real torque monster! A guy I knew back in the 80s had a 400 bored .030, 5.7 rods, 2.05 intake/ 1.60 exhaust valves, .680 lift roller Lunati cam, final compression ratio of 12.7 to 1, 830 cfm carb & strip dominator intake. Don't remember the peak power, but it was between 600 & 700 HP @ 5800 RPM. Turbo 350, 4500 stall, 5:13 gears, do 9:90 all day long on VP fuel in a 72 Nova sleeper. People would look at it & laugh, but we would always get the last laugh.
I would think you need to straighten that bracket to match the carburetor center divider so the air doesn’t confuse. So the straight bracket is parallel to the center divide on the carb. Because having a bracket block the wind from those intake openings can’t be good. In other words the bracket should be perpendicular to the front of the motor or East west so tut it lines up with that carb intake holes uniform! And it won’t be getting in the way of the airflow direct I to those intakes
The great thing about Nick's videos there is real time testing. Figures don't lie and we benefit from his experience.
Nick is awesome people I've met him a few times
28° of timing? Why so little. I'd have that at 34 or 36 if it was me.
Seems very low. I built a 381 with edelbrock Victor Jr aluminum heads and on the dyno, it made best power at 40 degrees total timing!... On pump gas. Also, it made 511hp at 6100 rpms, and 492 torque @ 4100, with a 650 speed demon carb. Compression ratio is 9.8:1. I'm not a master builder by no means, but I used to rebuild carbs at a marina boat shop. I really got into how carbs work back then and as far as I know, the bigger the carb, (let's say a 950), with the same jets as let's say a properly setup 650cfm, you will actually get less fuel into the engine. The smaller venturis on the smaller carb, along with the fuel boosters sense the flow of air better, which in turn draws the fuel in more and more accurately. Your throttle response gets way better too. I forgot alot of the terminology, but basically, you want the smallest carb on your engine as possible. There are simple calculators online that will tell you what you need. If in doubt, for street use, go with 1 step smaller if anything. I just did the math for this engine, and at 94% volumetric efficiency (a stock engine might be 85%, a well built race motor might get 99%, a blower motor maby up to 115%) and 6000 rpms, this engine literally needs exactly a 650 carb. My 2 cents
470 hp from a 400 more than respectable, I remember the old 'angle plug heads' they used to suggest use with HIGH compression pistons, something to do with the dome size and flame travel
Love your videos and the cars! Thank you for the work you do!
Thanks for saying thanks, Brent. You’re very welcome.
As I remember I think the bore was 4.125 by 3.75 stroke on these
That is a strong motor Nick
Couple of questions on the 400 c.i Chevy. I grew up with a girl who's Father was a 2 time U S.A.C Sprint car champion in the 70's and a Machinist. From what i have been told that 2 bolt main 400's are of the cast crankshaft variety. Also productiom 400's have the pistons way down below the deck from the factory also i was told the "Siamese" 400 block can't be bored more than .030 over. He built destroked 400's with Forged steel 350 crankshafts = 377 c.i. i know you said this was just a simple refresh job, but was the block decked? Steam holes added to "non stock" 400 heads? Also since it is externally balanced i heard bad things can happen with old harmonic balancers coming apart. Also what's your thoughts on bearing speeds and running a lighter bob weight allowing the engine to rev faster?? Vasilli G.F. Chevellle looks like it's going to be a MONSTER! I see it's been caged and a lot of efforts been put into going fast, i hope he upgrades the brakes to match the power that he's shooting for so she can be safe!!
the 377 combination runs real well. I ran one in my bracket car. that combination made 525 HP
Prolly destroke for cubic inch rules
Daniel Scott, All 400 blocks have siamese bores, and all 400’s came with cast cranks. 400’s can successfully be bored .060”, I’ve seen it done many times. And... 400’s have no trouble with RPM, I’ve personally turned stock crank and rod 400’s 7000 RPM many times with no issues. Hope this helps. 👍🏻
Gee, I just read some of the other comments and see I was not the only one thinking the same thing. Sorry, I should have read the other ones first.
The crossbar in the velocitystack was not clocked right and blocks airflow to two channels in the carb! Look at the overhead shots.
Correct
I agree David.
yep
The hockey player that you speak of got that advice himself from the famous American professional Golfer Arnold Palmer. About your ledgeable Signature. It shows you are identifying with that individual at that moment and you care.
These Chevrolet 400 CI small blocks were standard issue engines on 1971-1973 Chevrolet Caprices.
Also in the Leman's. Once you removed the factory smog pump/ emmisions crap, added a cam, headers, big Holley they're great
Aaron Humphrey the lemans ran a Pontiac 400 a completely different engine than a small block chevy
The 400 small block wasn't "standard issue" in any vehicle. However, they were an available option in many vehicles. They were discontinued for cars in 1975 or 1976 but still available in trucks/vans until 1979 or 1980. I currently own a 1979 GMC K-25 with it's # matching drivetrain-400 small block, TH-400 trans, NP 205 (I believe) case, 14 bolt rear/Dana front. I'm not bragging-it's not a jacked up show truck, just a good old working truck that wears its battle scars with pride, isn't scared of the local lumber yard or landfill, and gets the job done! My dad bought it brand new so it's definitely a keeper. I want to (and will) restore it in his memory someday. I just have too many other projects right now and this truck is helping me chase parts and supplies finish them. I own nicer trucks than this one, including a few that ARE show trucks but, with the exception of the 1978 K-35 that I bought, as a sophomore in high school back in 1984, dads truck is my favorite.
@@MikeBrown-ii3pt uh...you are mistaken a 400 sbc was most certainly offered. I know cuz my father bought a 72 Chevy caprice brand new with one in it and it even had the 400 emblem down on the rocker trim
@@MikeBrown-ii3pt and also they didn't make a k-25 or a k-35 in 78 or 79.
The designation was K-10, K-20, and K-30.
25 or 2500 technically and 3500 were later 80s and up
I built a 406 back in 1991 that I dropped in a 78 Buick Regal I had some old double hump heads with 1.94 valves my cam was a solid lift with 292 duration with a 513 lift and I think I had a Holly 780 double pumper on it and it made 569 WHP. I use to love whooping it on the 5.0 Mustang boys.
I had a 1970 nova with a 400 small block ,,that baby would burn the tires and go like a bat out of hell..awesome engine. Wish I still had it
So, when you're about to run the sweep and the engine rpm goes up, then settles down before the actual rpm sweep begins...tbats basically when the load is being applied to the engine, correct? And you're basically waiting on it to stabilize before running your rpm sweep? I'm not well versed with dyno please excuse me if I call something the wrong thing. What rpm/sec is the sweep or however you would ask that? Thanks!
JC. After we push the load "on screen" it revs up to 300 RPM's per second.
The 400 was a beast. It got a bad wrap due to over heating. The Siamese cylinder design due to the larger bore and having steam ports in the heads caused them to be heat sensitive. Not an engine you want to neglect the cooling system in. Can't wait to see the perty pink big block roar!
I put a Mighty Mouse 406 (Smoky Yunick specced .030 over 400) in a 66 shortbed fleetside pickup back in the 80's. Never had anything that strong or fast since.
Numbers appear to be kind of low for the small block 400 don't you think unless it's just a pump gas everyday driver to the grocery store
I was looking for the head ID marks, thought they were only low buck heads, maybe wrong BUT ?
Nick, why only 28 degrees?
Didn't 1983 Hurst/Olds come with a 307ci Oldsmobile engine?
D. I believe it did.
I agree with what most have said, not picking on it but the bar could have possibly been in a better position. Also, I’m
Curious, why 28 degrees timing? Seems way low from what I see SBC like. I enjoyed watching though !
Dang Nick that charger looks better and better.. It was just a touch exciting to watch you put that heater core in.. I have done these kind of restorations before (I actually have the last car I am working on -1963 T-Bird- in the drive.. I just put in the hydraulics for the top and finished off the wiring in the trunk) But no more.. my body it to old to do this anymore.. I was glad to stop because I just can't do it anymore.. But then as I watch you work on your toy I get a bit nostalgic and remember how it feels.. But no.. I am done.. I am going to ship all of my shop tool off to my son this spring.. Vasili looks to be a funny lad.. He must be good to have around the shop! Not only a hard worker but a fun fellow.. that is a good combination.. Well have fun my friend.. it is always great to have a job you have fun with (most of the time) oh one thing.. I have been to your wonderful country.. and I have needed a heater during the day as well as at night many times.. Enjoy! and thanks for the share..
A friend talked me into a 400 block he had laying around punched it 30 over with a mild .455/.455 cam slapped some comp behive springs on a set of vortec heads with a rpm air gap intake and a holley hp 750 and a set of headers ....it's a torquey SOB !! Stout little budget build in 79 camino with 3:42 gears was just expecting a big improvement over the tired 305 it had but runs harder than i ever thought it would for the money put into it
Finally a 400 small block,... my favorite motor of all time,... a perfect upgrade for that F-Body that happened to roll in...lol!
the 400 sb doesn't get much play. Kind of an overlooked engine
The 400 takes more money to build, it overheats easily, it has thin walls, it’s not overlooked, it’s just a bad design for the SBC to go over the 4.000 bore like that.
Yes they’re great performers yada yada yada, they’re not as reliable
Definitely have to have a good cooling system but torquey little engine's.
I had one .030 over to make a 406 in my 63 chevy II. It had a 4 core that kept it pretty cool. I like the 400 also.
No. You're DEAD WRONG. you listen to the internet. But good luck with that lol.
I pulled mine out of a 4 door 73 chevelle, that was in 95 give 150 bucks for it.the numbers I looked up on it it was 290 horse power 490ft pounds at 23hundred rpms,an thats with a 2barl.wild thing about it ,it had 290 horses on the air cleaner,it was a one owner car,the engine went in my 80 z28
Why such low timing? 28’
Funny thing, I am a big fan of the small block Chevy but I do not like Camaro or Corvette. I prefer the midsize cars Chevelle, El Camino, nova, Monte Carlo
Mornin nick..I see the street in front of your shop is buried in snow..lol..perfect timing..just sat down with a fresh cup of java to find a new episode from you..have a good day!
I had a few 400,s I liked them better than 350,s but they are a hot running motor with thin cylinders a 4 core radiator helped with a added electric manual switch fan, I heard they had a 400 marine engine with thicker cylinders
471 hp from 400ci-pretty impressive. I’d be more than happy with that result. And maybe other commenters have a point about the mounting bracket of the stack , both about the cross over bracket and rejet 1 step up. And Visili, forget the Water/Methanol spray, it has been tested and shown to do absolutely nothing towards power upgrade , but WILL wash oil lubricant off cylinder walls and degrade oil pressure/ protection throughout that beautiful engine.
If you are running a high compression engine on the ragged edge and getting pre-ignition/pinging you can use the water/alcohol spray to quench the pinging, thus enabling you to run more timing and get more power. I used it on a high compression 460 Ford that I used to tow with and it really worked for me....more power, better gas mileage, cleaner plugs, etc. One thing to watch for is spray droplet size.....too large and it can erode the piston tops, almost like sandblasting the pistons. The closer you can come to a vapor(not a droplet), the better for all engine parameters. That said, there is nothing to be gained if you are not running on the very edge of your engine's octane needs. If you are washing down the cylinder walls I would suggest recurving distributor so you can use less alcohol/water injection. That's what worked for me.....would like to hear some suggestions from you guys......I'm always learning. Good video, Nick. Thanks, Tom
a local engine builder makes 450-480 hp 470-480 tq with a 400 sbc ..030 over bore stock cast crank .ported 441 heads ,bigger valves ,victor jr intake ,750 dp carb.isky 292 mega cam .pump gas
All very good points, live learning from you guys.
Ask someone in the oil field to get you "casing head gas". Run that with a water injector.
@@tomnekuda3818 I have heard it can erode headers if you use it cold. Not 100% on that but I also knew a dude with a TA that was running it because his comp was a bit hot for pump gasoline.
You call this maxed? lol a better cam and heads would easily touch 650
People run the 383 which is a 400 crank with a 350 bore because of the beter water cooling. The 400 cylinders are siamesed together. So it is interesting to see a true 400 dynoed. Thanks Nick
Velocity stacks are garbage... It would have made more horsepower if it was sucking cold air down into the motor...it's made to be running to force air into the motor ... High performance motors such as mine and the ones you build are really to be driving in sping and fall when the air is much cooler... Drag motors love cold air...great show Nick ..
I love SBC 400'S. I'm in the process of building 2 destroked 400's(1182 forged crank 377 CI and a 4672 forged crank, GM semi finished dimple rods 7/16 bbc rod bolts 350CI). I Absolutely love the PAXTON IROC Z-28.
I built a 377 in the early 90's, wow did it run. low 6's 1/8 mile and low 9's in the 1/4 at 145mph, pulled front wheels up a foot. left line 6500rpm, 1.4 short time. PS all on 10" slicks non tubbed, also 2 speed power glide. they made me install cage in my street car, (I can see that) plus any faster then a cute. Red line was 9600, but kept it under 8600 for less mph. Never on dyno, but figured 600. Good luck on your 377 and enjoy
I figure the SBC 377 is the best engine combo for the dollar. Big bore short stroke long connecting rods. Revv to the sky my man.
Didn't mean to disrespect the gift it was extremely thoughtful but as far as making a difference in performance I'll be engine, it really doesn't have any effect and from what we've seen it actually hinders a performance
4:41 even a stock 400 on a Q-jet LOVES when the secondaries open.....WWWWAAAAAAAAGGGGGGGGG
and ya can watch the fuel gauge move in my 77 1/2 ton also....
Check the rockers on the big block. I think they are in the wrong location. There are usually 2 rockers with rounded corners to clear the valve covers. Off hand I think its #3 intake and #6 intake that need them. I see a rounded corner on the #1 cylinder.
What totally surprised me is Nick allowing anything not MOPAR on his dyno, LOL
Always thought the 400 SB was underated motor .Thought the worked well in blazers /Trucks my favorite swap with TBI
Nick is never tired at work, especially after a late night..because he is on speed...the high dose kind...legal too..
That, and a little Tim Horton’s coffee.
@@NicksGarage , FTFY and a lot of Tim Horton's coffee..I know, as it's the only thing that gets me moving in the mornings too ;)
Mr. Itchrocker, what are you on? Making HP is a natural high.
I was thinking that the crossbar inside that v-stack should be ( vertical ) like a wall between the barrels it didn't look right sitting "flat-horizontally"
The blown iroc looks like it was a street beast in the early 90s, it will be cool to see it come out again.
What is the story on the wheelstanding amx picture in your staircase? Love your work Nick.
Hot80s. That AMX. It belongs to a client of mines, who loves AMC cars. Yes, that car has come to my shop a few times. It sure is a fast car.
awesome video as always I especialy like the picture you have up in your stock room of a 1970 Plymouth fury 111 convertible :)
Man i love that Challenger,,,, pure GO_ FAST
the mighty mouse ! ive had my 64 Malibu 36 years 327ci isky cam 202 camel humps,4 speed... fun fun fun ! ask grumpy lol
small journal 327's Rev to infinity WINNING!
Ritchie Zul was a small block genius. Now he only builds big blocks for Mercury Marine. His 66 327 Nova got up to 650 HP in 67.
I have a 67 impala with a mighty mouse 327 but them 283's built right are insaine n can twist up the rpms like crazy!
@Dave Micolichek i agree torque wins races! Torque gets u out there rpms get u to the end of the track!
11 years with an 11:1 333” comp magnum 286, aluminum heads, daily drive it everywhere! It loves the RMP and is a mean little mouse for sure. The 327 was and is a great engine.
There are 400 sbc here that twist 8500 on the drag. Of course it is aftermarket block forged etc but theyre 400sbc.
I had a 1974 short wheel base(shortest van made) Ford Van in mid '80s,a 302, 3 on the column, and 3.73 rear end gear with 225r70 Eagle ST tires on factory steel wheels, dual exhaust, it was a Rat Rod before there were Rat Rods, lol......1st and 2nd gear would roast IROC Camaros, but the rpm jump, gear ratio jump to big into 3rd, they would catch me
Hmmmmm........
Too bad every other engine used on this dyno gets the timing maxed but not the 400???
Video should be changed to we did not max out this 400?
I had one built on a super budget, one of the best small blocks I've ever owned.
you are comparing the velocity stack to a carb with no air filter? the comparison should be with an air filter? the velocity stack is not meant to protect the engine.
that flat strap inside the velocity stack is to far down inside the throat and its likely disrupting air flow. bad design. also the carb itself may be designed for a more wide angle air feed like a stock air cleaner housing. I made my own velocity stack for my 56 power pack chevy. did it help power? I don't know but it looked nicer than nothing. I even painted mine chevrolet orange inside.
I can see that the velocity stack is not in line with the carburetor it's over the venturis the metal bar the metal bar should be in line perpendicular with the carburetor air horn the reason why you lost horsepower is cuz it's disrupting the airflow put the car and put it straight and then try it again 🙂
Nick you're so positive, I love your videos. ☺👍
Try a stainless steel salad bowl in stead of a velocity stack. Cut the bottom to fit the air horn and fab a small bracket similar to what the velocity stack uses only have it go over the top of the bowl.
The velocity stack may have caused HP lose due to the flat crossbar for the stud hole...that bar should be tubular or aero shaped!
Does anyone know if this is a stock bottom end? I didn’t know if the stock 400 would rev that high with the shorter rods? I’m putting a 400 together and would love to know. Thanks to anyone that replies.
Matt. It has a Nodular crankshaft with some strange rods and rod bolts. Some kind of H.D. rods.
Nick Panaritis that helps a lot. Thanks for the reply Nick. Love your videos
Y only 28 degrees? Wats wrong with 35-36? Y only 5500 rpm? 406s make 550 easy.
I wonder what the true wheel horsepower will be in the car.
minues 18-21 percent for a th 400 maybe 16-18 percent fo 700r4/60/80e
seen many 450-480 pump gas sbc 400 around Mpls .I have a 427 sbc .there some good prices stroker rotating assemblies that can add alot of cubes to a sbc
I would figure an 830 CFM carb to be good to about 7K rpm.
Awesome Nick《☆》I saw a Ford Pinto last saturday at my local main street car cruise. It had tbe original 4 cyl running side draft carbs with velocity stacks. I meant to ask why no air filters but I forgot. I know :*: better flow but sand & bugs totally not worth any hp gained on a good engine ☻
stacks will help the air flow to the carb, how much.. dunno but ive seen draggers run with no air filter, the air flow over the carb can suck fuel out the float bowls, running an engine with out an air filter is just asking for trouble, one small rock etc can wreck the engine, the dyno pulls mean very little as the air is not moving over the engine at a high enough speed, the only way to really see the difference is on the track.
Strong engine no doubt, but l liked the green 283 you had in there before...l'm just now noticing you have the hood on your Challenger & thinking you're going to install the drivetrain from the bottom with the K member attached...Chris Birdsong ("junkerup" TH-cam channel) did that with a charger he was working on...l like the way he beefs up his K members especially where the the steering gear goes...l know you're a busy man, but if you can find the time - you may want to check him out...that young man does good work with a "can do" attitude...good video Nick - keep em' coming
Hello nick, good running 400, what heads?
Man i love Greece. I have been to Athens, and many greek islands
Good folk
Love this channel
I vicariously visit Greece through ordering the gyro plate at the local restaurant.
Always great shows Nick . I thank you. Other than the xtra 50 c.i. 's what is difference between 350 & 400? Thanx again for great, great shows.
Jarvy. Well said, thank you.
Jarvy - I thank you sir. Totally get it.
The velocity stack wasn't made to out perform an open engine on the dyno. It was designed to help pull air straight down into a carb helping the air flow.
Carbs like to pull air straight down so the raising of the sides on the stack does help air flow when you have a filter element mounted.
When you start testing the different air cleaner assemblies and filter sizes you will see the benefits of the velocity stack. Filter assemblies rob HP especially the smaller ones. With a small 8 inch air cleaner mounted directly on the carb with a 2 inch filter in it you will lose 15 to 50 hp (depending on the engine) over open (nothing on the carb). When you add the velocity stack and mount the same air filter on top of it you will gain most of that back so it does have its benefits but not in this situation.
On my 500+HP 383 I used a velocity stack with a 4 inch filter on top of it and only lost 9 HP over open. Every other filter combination lost at least 15 HP and went up from there.
BTW the little 8x2 assembly cost 48 HP on my motor.
Funny how difficult it is to tune an engine. For one application a velocity stack like this means a huge difference. On my 69 AMX with a 390 I used a short stack with a foam filter on top and it killed horsepower. Then I installed a used Moroso air cleaner which could have been used with a KNN stub stack if I had been running a Holley instead of a Carter AFB, and it made a big difference in the seat of the pants dynonometer and in observed acceleration against cars I had previously run. With the right set up, like a rebuilt engine, high compression Pistons, chrome moly dings and a better cam, a torker manifold, the best available at the time for AMC with a Holley 750 and a stub stack with the Moroso style air cleaner, it would have made well over 1 hp per cubic inch. In 1969, without these parts the prostock entrants back by AMC made over 500 hp. At the time I owned my AMX the Mopar 440 had a build card they made available to the public that made 529 hp from a 440 cubic in big block Mopar. The 390 made the same HP in '60 without the good dog leg heads and Cams choices. Had they been compared side by side I think the red headed stepchild of the Muscle car era would have kicked the 440's ass. Keep in mind that that statement would be backup up by an article by Hot Rod Magazine in high the 440 Mopar got that exact build, while every other big block out there got as close to the same build as the Mopar mill. That means the 454 Chevy, 455 Pontiac, and OLDs, along with the 460 Ford all got aluminum Edelbrock heads while the 455 Buick got its heads from TA performance right here in Scottsdale AZ. All the engines were equipped with edelbrock Performer heads and manifolds hill the Buick got TA parts, and the Cams were supplied by Comp Cams, which were ground as close to the 529 hp Mopar grands a possible given their advanced technology. The number one position was filled by the TA Performance Buick. number two only a few hp shy by the 440 Mopar, followed by the 454 Chevy. If they had run the little 390 or 402 AMC mill with the current Edelbrock parts and a cam with time same specs as the Mopar, I think they would have taken second, or possibly first away from the competitors. The funny thing is that the mighty 454 did so badly that the next month's issue had them replacing the equal intake manifold and intake to get the Chevy on top of the mix. But honestly, if the rest of the motors tested all got those same treatment The boat anchor 454 wouldn't have faired any better. It's all about the balance of parts. And the velocity stack used in Nicks test was useless at low RPM. Even the short Velocity stack lost out to the Moroso aircleaner which offered a contoured path to the carb from both the bottom and top of the air cleaner. So, take the adds behind these parts with a grain of salt. And forget your buddies opinions too! Look for data already collected by the magazines. They spent money to inform you how well stuff worked, let them foot the bill
ken c. OK Ken. Thanks for the info.
Love your videos Nick. G’day from Australia 👍🏻🇦🇺
Hi Nick, I was a way for a wile. I m back watching your videos. and I see your number 1 mechanic girl friend has a Chevelle SS .I had just like it. I can wait to that big Chevy motor on nicks Dyno. hey keep sanding these great video. take care nick.
Glad to have you back, Melvin.
I would try turning the velocity stack to line up the center bracket across the divider between the primay and secondary barrels. The way it's on the carb for the dyno tests is blocking one primary and one secondary venturi. This has to be interrupting the airflow into those venturis.
"400, not a very popular engine" yeah compared to THE most popular engine the 350 chevy.. But still more popular than Ford engines from the same era just because its a small block chevy.. No such thing as an unpopular sbc 😆
i know, i got exactly what he was trying to say.. I just thought i'd point that out, he knows his stuff tho. Those engines are an easy way to get 400 hp without really doing anything to them.. Yes u are correct tho
Love your channel. I watch it all of the time. Just a suggestion on the velocity tower. Remove that piece that you drilled out. And use bungie cords like you use on that other one you show sometimes. If you look at the straight down view, that bar is interfering with the air to two of the ventures. That bar is causing interference to air flow. Just a thought. By the way I'm a 71 year old viewer, and you make me feel young again....
Obvious Nick didn't care. (I'm 70 :) )
I wouldn't be surprised that the thin flat plate that crosses over inside the velocity stack is causing turbulence in the air flow into the mouth of the carb. also a lot of people don't this if you are running an open plan intake you need to use a 1/2 " to 1" spacer plate with the four leaf cover pattern that has no divider in the middle of the spacer plate > looks like a square hole with a cylinder cut out in each corner > has been known to improve hose power and torque!
Jeramiaha S. Thanks for the info.
All that cool stuff in your shop and you bust out the old school plug in drill to make a hole bigger. Thats funny lmao!
Hey Mr Nick I sent you a message a while back I have a bunch of Mopars from cuda's to challengers Road Runners and a lot of ole stuff too the early to mid 60's cars just too much to list I was going to get a a list and pictures made up and send you I love that you are restoring reminds me of my Dad and I he will be 77 on Mar 14th and I am 52 we have been Mopars collectors and we have school busses full of engine and transmissions we even have some ole 413 cross ram set ups! I pull some of that out w my friends and they just shake their heads they havent a damn clue!! Thank you for the videos my father has has only 25% of his heart and I would love to get you guys together I could just sit back and talk about all the old altered wheelbase Belevedeer and my dad had his heart broken his 66 Plymouth Hemi car he left it at my uncle's in 72 to go to the work he was an engineer on the Railroad and someone stole it and I know it's still around NC and I'll find it they will slip up and call me. And ask me to come look at this ole Plymouth that's been sitting in the barn he bought them it only had 6,000 miles it had never been nothing but drag raced in Canada and Niagara falls my parents were from North West PA originally and I appreciate your videos and I told you before if ya need anything if you need anything email me at we have a 434 Chevy I know my dad is cussing when we pull into the dragstrip its all tube chassis and front mounted I liked it because it's a crowd pleaser he said you have to have some dignity because people could care a less only that it's a fast beautiful little car ya done ever see anyways my email is corvairman69@gmail.com if I had yours I would send you my phone number we have a collection alwaso have some 66,67, thru 72 chargers and just all kinds of things Mr Nick! Your doing good your between the ages of my father and myself and I hope your health. Lasts I believe is ya never stop moving the more eledeely people that are mechanics and have done hard work and make sure you have some fun too, in moderation but don't work your life away buddy!! Take care Mr Nick!! God bless and Happy Easter and I hope you have a great one!!
Drag car Builder. Sorry for the late reply. Please Email me your number at "indyauto@videotron.ca"