408ci Small Block CHEVY: SLEEPER!!! Showing our Hand on what's inside... ALMOST
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- เผยแพร่เมื่อ 27 ก.ย. 2024
- Here on Unity Motorsports Garage today we are taking a deeper look into the 408CI Small block CHEVY that we are building for my buddy Joe Davis's 67 Chevrolet Chevelle and what we are doing to give it the sleeper status!
I will be using all of @DavidVizard tricks on this Holley Street Dominator intake
#chevy #dragrace #chevelle #dragndrive #budgetbuild #fast #gm
![[Full] 4 ต่อ 4 Celebrity EP.910 | 22 ก.ย. 67 | one31](http://i.ytimg.com/vi/4TR3MVpOiw8/mqdefault.jpg)
The old Target master.
I was building a very nice 283 Chevy one time and while I was working on it a friend was visiting with me. After I had put the pan on it I asked my mentor if he saw me tourqe the oil pump. I knew I did but he said take the pan back off and check it. I learned my lesson and paid a lot more attention when doing these things.
I would take a yellow paint pen and mark the bolt heads after I torqued them down. I posted that before I heard it on the video...lol
I remember my 73 cutlass, factory 455 4-speed..not a w-30 or 442, it was even more rare than those.. but when you put your foot in it, that quadrajet back barrels opened.. i think I seen the hood suck down a little..😂
👊🏻☕️
My guess is 510/530
BbbWaaaaaaMmmmm!!
@@latrogeniwile58 🤣🤣🤣 yes sir.. that sound you will never forget if you've experienced it
Great video guys! I enjoy the idea of tweaking any motor to squeeze ALL the power available.
I’m predicting 477bhp/505tq at 6300/4800 rpm.
Or thereabouts!
I like those numbers! Thanks for watching
Andy
Love the sleeper thing. My AFR heads on my Dart block, Jesel valve train, Diamond piston solid roller 327 is painted orange with steel valve covers.
Love it!
Andy
Without knowing the cam specs 525-550hp Andy. When you say low spec hydraulic roller I think in the .525" range. It is you guys putting it together so I'm expecting big things. The amount of 383s exceeding 500hp are a dime a dozen on TH-cam. I see no reason why this wouldn't make in the range I suggest.
The giveaways for me are, you've got the AFR heads, the single plane intake and 'that' crank. On top of that a dual spring hydraulic roller. Then there's the professionally prepped Q-Jet from a Q-Jet master. All this suggests RPM higher in the range. It's going to be quick this thing. I feel it in my waters.
We'll call it a lazy 565hp @6700rpm if the cam specs allow it. How's that for an each way bet ROFL?
please check wall thickness on that stock block...had one collapse at 7 grand. sounded like a buzz saw cuttin' that engine in half. car was running 10.40"s in a 68 camaro.
The manifold reminds me of the Weiand 7525 that DV & Roger used so often to modify by extending the runners into the plenum. It was supposed to work as well as a Performer RPM down low & get Real close to Victor Jr up top?
Shhhh.. 😉
Those Holley intakes were much better than the Edelbrock in the same era. Hard to say on power with out cam specs. I'm guessing with the parts you have 1.75 headers 480 hp and 455 torque.
Mid 400's for horsepower but it'll have a torque curve that'll make use of them front suspension bump stops quite regular! as always, another great video.
My 408 sbc solid lifter cam 560-580 Dart 215 cylinder heads ported Edelbrock performer rpm spread bore you may laugh I’m using an 800 CFM thermal quad that works fantastic 556 hp 604 torque 9.6 compression street Engine the is a truck 97 S10
Some things make it look like a torque motor but I think Andy gone try fool us..Just shy of 500 for this little screamer 408ci so 485hp.
Once the engine has been run, the timing chain will stretch 2° or 3° making the cam on around 109° lobe center. It's not going make much, maybe a little over 400 HP.
Those AFR 195 heads are capable of over 500. They're gonna fool people 😅
Its like hobby stock hour
Its tough to say, i those afr's are great, you got snappy compression I bet that smallish cam has that 108 / 106 lsa knowing y'all Ima say 450 hp 510 torque.
I am not sure of how much horsepower it will make but those decals add at least 15hp!
That's exactly right!
Andy
Great vidja 🤙🏼
476 Horsepower.
Nice build.
Hard to say without the cam specs. Sounds pretty tame. But since I'm guessing Vizard had a hand in the specs, I'm guessing 485hp
I would say that is a solid guess!
Thanks for watching
Andy
Nice build 425hp
appreciate the bolt length comments.
410 HP 370 LB-FT
Happy New Year!!!
I'm now excited!
My guess is 535 ft-lb @ 4700, 510 hp @ 5300. With 272 seat, 0.600” single pattern straight up. You need wider tires!
Project Sleeper Joe's SBC 400 is going to make 476 hp, especially if you're using Dyno headers which you will. That cam looks quite beefy so the only restriction is that Holley manifold, I don't think even you Andy can hog it out enough and still deliver equal flow buddy. Looking forward to the Dyno session guys!!
Need an 80’s caprice for a sleeper. But that chevelle is sweet and sitting with the hood up will look like an economy engine build. Objective achieved. Nice
solid build im thinking around 475/ 475
Can't go wrong with with a 800 Q-Jet and the Holley Street Demoniter. DV has one in his old book.
I thought 195 meant the intake valve size at first, and thought, "aw not even 2.02s?"😅
GM liked a wide LSA, so I’m guessing this cam will be around 114° to sound close to stock and 215-220° duration at .050 but probably a lot of lift…
With those heads, 10.5-1, a “smallish” cam, single plane, your know-how yields 560hp @ 6300 & 530tq @ 4600rpms
The intake is the giveaway. A ported dual plane would make it sneaker
450 or there abouts
Happy New Year
496 lb ft and 430 hp
Target master
Yep. I remember seeing an article, and ads for them, in Hot Rod or Car Craft 30+ years ago.
I think you are going for the TQ monster.485 around 3800. Will have a long TQ curve. Maybe 330 hp around 4900. Looks fun guys.
I’m building a similar engine.
Hard to determine hp and tq without knowing the cam specs, but I’m guessing around 510-520hp and 495-505tq @ 6200 or so. I’d LOVE to know what that cam ACTUALLY is- if I’m guessing in the ballpark, I’d say 280/284 adv., 230/234 @.050” on a 105 CL?…
Anyway, thanks for sharing. Can’t wait to see the dyno video.👍🏻
Day 2 bolt on action. I have put my share of those Antique crates in.
Remember to check DV's 400 deck mod to address just that issue?
440hp and 510 lb ft depending on the cam specs
Listen to you Andy - I think your more excited about those parts and the price lol. I love these stealth engine builds. It's its like the 318 build all over and I learn so much from these builds. I'm thinking 440~450hp. Can't wait for your next vid on this.
3/4 race cam.....LOLOL. What's up with the early 2nd gen in the background?
I know right! It's a Z/28 four speed car that Joe is restoring. It's going to be a Day 2 type build and given the detail he put into the Chevelle I know it will be one sweet ride!
Thanks for watching
Andy
Comfortably 1.5 h.p peri cid ..all things considered that's a lean estimate ..great video Andy ..btw how is D.V ?
ain't nothing you can do to those AFR heads to make them look stock. Especially with a Holley single plane intake manifold on top. I hate how the word "sleeper" has been completely destroyed these days
Watch me!
Andy
Interesting build split 500 500
Thanks for all your great videos! From the early 80’s in Rich Voglin’s SA book Engine Blueprinting he asserts that for street engine leaving the sand cast surface on central area of the intake runners of cylinder heads was advantageous as the greater surface area helps with atomization, only smooth porting the valve seat bole and a little on the manifold side . Do you know of any flow bench/ dyno data to substantiate this .? Seems to me the turbulence that the rough surface causes would offset any advantage.
You got some cool go-fast-bits there… 🤔 570hp/550tq
Ehr71360-72360 lobes on a 110 lsa. They just flat work!
If not that then ehr72360-73360 on a 110
Something I would recommend with that build is at least a halo girdle. Seen to many pictures on the net of sbc 400 two bolt main blocks that have spit the crank on the ground.😯 The block fails right there where the tapped hole is. The stud or bolts fall right out and the spinning crank finds it's way out of the oil pan very violently.
Factory sbc 400 blocks hold up very well converted to 4 bolt splayed caps and a halo girdle. This would be anything over 550 HP and/or anything over 7,000 RPM. Anything else under here and above 400 HP it's a good idea to at least get a halo girdle IMHO.
Depending on what the actual cam specs are and the rpm range it will run in, it's not easy to guess the HP. But that being said, being a hydraulic roller it probably won't spin faster than 6,500? Which comes to the question, why use a single plane intake if you're not going to run a solid roller cam?
With a solid roller cam and all the other parts I would guess 580 HP. But with the mis-matched cam and intake I'm going to guess 100 HP less at around 475 hp?😎👍
Almost forgot the torque, I'll guess 485 ft lbs.😎👍
Thanks for the video!
Good carb and intake choice. Curious as why you went with those heads?
And why no porting with those heads?
Joe already had the heads and they come CNC ported and flow slightly over 300cfm
They should support really good power and we are looking for ALL of the Torque we can find, the intake will fit well under his stock hood with it's low profile, should be interesting
Thanks for watching
Andy
@@UnityMotorSportsGarage I am guessing then that you are wanting TQ. to come on earlier, and stay flat like a table top! Looking forward to the dyno runs! Thanks!
@@UnityMotorSportsGarage alot of guys worry about that equalized flow from that intake . I say dont let that intake Strangle those heads !!! How good you fix those extended opened up ports will be THE determing factor for that Horsepower And Peak Torque . Put the intake manifold port area where it needs to be period for flow of the heads and let the big dog eat !!! A 400 will suck like a madman on those smaller 195 ports especially if thats a milder cam with tighter LSA of 108 or better yet tighter and some decent lift . Sounds like thats what you boys are up to . Bigger lift , Tighter LSA , and milder ....say 220-225 deg maybe a little more duration . It will Pull Stumps and still breathe upstairs to carry the power out id guess to 6500 or so . The Q-jet from a 500 Caddy is the bad dude FYI @ 830 cfm....stock lol . Q-jets love slabbed throttle shafts best done Before you ship it !!! A merge venturi collector might be nice with DV quiet zero loss exhaust . Yea this should be FUN !!! I bet the dam thing will be good on gas too lol . Dont mess with older guys and nervous , mild sounding hot rods , they dont play fair . Hope you got Drag/Street Radials , youre gunna need them . I may have attended a goat roppin before !!! LOL !!!
@@UnityMotorSportsGarage those era 66-67 Chevelles dont do great on the launch with a T400 and mere grunt . Youd best not be thinkin a turd RB Mopar style powerband only !!! The cars Work Far Better with a flash smack on that convertor almost like a stick/brake and some horsepower to 6500 or so and the 400 lives to battle another day !!! The 195cc ports and hopefully equal flowing intake manifold runners are gunna be velocity limited to about 6500 approx anyway and its stalling the flow without gain much beyond that . Id be taking advantage of those short rod ratios to be intense on that sized limited area runners velocity to 320 fps and maximize the bdc fill as best you can upstairs valve hung open . Even on that doctored small plenum single plane its gonna swallow a 1000 cfm carb plus at a half inch of vaccum easily !!! Let that Chevy BE a Chevy !!! This recipe Works !!! I hope thats what is planned . I Love that Nervous Powerband that a 400 Can deliver while being down right Stout !!!
465hp 510tq.
Are you sure .034 quench is ok with froged pistons? I am asking, as i was told .045 min for forged pistons and .035 for hyper pistons
425 HP
Oh yeah that is fine! I've run tighter with no issues.. the ideal amount is when you have no carbon trace on the piston crown and no witness marks from the piston kissing the head!
Thanks for watching
Andy
Hard to find reliable information on that intake manifold. Holley claimed power from idle to 4800. Doesn’t seem right considering how short the runners are. You guys should definitely plop an EGR valve on it just for looks.
Do u know if the early Chevy crate motors were 2 and 4 bolt main or just one of the 2
The ones I put in back in the day were 4 bolt mains if I'm not mistaken. The last one had the one piece rear main seal so I'd assume that was a 2 bolt block that was in 08
Thanks for watching
Andy
I predict it will make 535 horsepower
480
435 hp, 480 torque
425 horse 480 torque
I'll go 425 horsepower and 550 ft/lbs torque.
Im guestimating little over 600hp
571hp / 612Trq
I predict around 540 HP.
I'm thinkin 480ish HP What length rod are Y'all using ?
It's a 6" rod
Thanks for watching
Andy
107 LCI suggest that you are running the Mike Jones camshaft retarded? That is rear. :) Maybe a dual pattern cam adjusted to were intake valve closing and exhaust valve opening has about the same numbers?
400 CID x 1.35 = 540 lb/ft and with a mild small cam horsepower will usually be lower than this due to the engine not revving. If max horsepower is at 5400 rpm the number willl possibly be 540 x 0.9 / 5252 x 5400 = 499 hp.
Years ago a friend had a 327 Chevelle with a Street Dominator intake and this engine worked surpricingly well, espesially considering that in one of DV books it is on a photo with a text that tells us it did gave him a long and frustrating day on the dyno. :) He then went to a Victor jr. manifold that worked very well.
I think 516hp & 497 TQ
500hp
545 hp
456hp/465Tq
I will guess 468 hp. I am curious about that intake, I have one hanging on the wall but have never run it.
400tq maybe 385hp😮
520 hp 540 tq
No cam specs and guess hp? Heck: how does 482 sound?
I promise it is small for a 408" engine duration wise! But it's going to make some power!
Andy
@@UnityMotorSportsGarage I bet it's around 230/236. With a performer RPM intake I've seen a combo like that pull 550HP/550Tq with the 195 AFR heads.
@@UnityMotorSportsGarage Happy new year, and keep em coming.
535ft lbs 540hp
Are the heads steam port heads??
Yes Sir
585 horses 625
510 h.p. 510 lbf.
"Sleeper"? How so. This car will always demand and receive the spotlight. Nobody's sleeping on that '67 lol it's too rare, too cool, and too gorgeous. Even if it was a rustbucket or a survivor with a hot engine. You can't have a nearly 60 year old car NOT stand out like a sore thumb. A "sleeper" today is a '97 Riviera converted to RWD with an LS7 in it. Something a person would 'sleep' on. I think the last time I saw a legit sleeper was in the '90s. Nobody has been fooled by an old car since then.
425 hp. 445tq
⛽️🍕🍺
Not a sleeper , I'm guessing 425 up 465 tq. I just blew a 406 sbc almost the same compression
400
550hp
Guess 408 535 HP
425hp
520 at 5400
If you approve of the camshaft and say what c.i. it is, I will know close to what it is,at least the most important part, the LSA. If you installed the Cam at 109 the LSA is to wide. That 406 at least needs at the widest a 107 LSA with with that combo and I'm sure you are not putting the Cam in retarted. I think,no I'm sure you are funning about the combo.D.V wouldn't approve of the specs you are stating.500 +tq and 530 hp.
347 hp
515 hp
485 hp ….?
375 hp ?
Undisclosed cam spec's make this entire show a waste of time for me.
The specs are laid out later.. hint
Andy
The all black crate engine look reminds me of the Saturday night special article from back in the day. Very cool
Hold up. Is that a Winters Foundary logo on that Holley intake? I didn't know Winters cast those for Holley . I'm glad to see you went with a thinner head gasket. As far as the true compression ratio, I see some benefits to figuring it that way, but for comparison sake, most folks aren't figuring the crevice volume so I think there is value in keeping it consistent across what other guys are doing. And my prediction is 520 - 530 lb/ft and 460-470 hp.
Upper steam hole between cylinders 6 & 8 was already plugged! Hmmmm
Hey thanks Andy, nice little morsel of information, regarding how the intake is designed and how the engine,' sees " the reduced opening as a smaller port! Now don't get angry now please, as to the numbers. 380 hp at 6500 and 420 ft/lbs, at 5600. It is a guess, good people, just a guess! Happy new year, everyone!!! It's the 31 st here in Oz, so the new year awaits!
May everyone out there, have great fulfillment; when it comes to completing their projects!
Heartfelt good wishes, to all, Adam.
My dollar says 450 hp and more like 500 ft/lb.
Seems like to me those crate 350s were like $800 when they first came in out in the late 80's. Man that was the good old days! lol
oh and I don't know how you define a small cam so I am going to say 500ftlbs and 470hp
That is a really good guess! I also remember seeing those crate engines for $800 when they first came out..
Hope you have a great New Year!
Andy
I'm thinking around 450 - 475 HP and well over 500 Ft.lbs.. I would be very curious as to what the dynamic compression will be with the 10.5 to 1 static and the "small" camshaft. Not crazy about the intake but, with someone working it that knows what they're doing, it'll flow very well to all of the cylinders. The heads are very good, especially if they're the competition ported! Yeah... I think that it'll do very well. All that any basic 400 needs is a good camshaft and great airflow to make really good power. Good luck
Careful Andy! Playing with a Chevy is like a married man going to the titty bar. You might start liking it and us ford guys need you on our team. long live Casper!
You're not telling us the specs of the cam? Lame!
Hey fellas look . Can I ask you a question about this "Sleeper" WHY BOTHER ? You could have taken any early 427 BB and with just a few tweeks had an animal a real sleeper . you could have used an aluminum intake with an 850 cfm Holley and with just a cam swap produced 500LBS with an easy 450 HP ..
You pop the hood on any car and see a Big Block the sleeper element is gone.. plus we made more power than that and it is about 150lbs lighter on the nose
Andy
520hp/530tq
Must be getting a little bit chilly in the great state of NC. Jackets and a beanie cap. By the way good morning to you all.