Ok, I am building a 400 SBC for my 68 Camaro Bracket car.
I am looking for the most power I can get on pump gas. I would like input on Cam, Carb, and Torque Convertor for my application..

Spec:
400 2 Bolt .040 over = 408 CID..
Eagle 4340 3.75 Crankshaft.
Eagle 4340 H-Beam Rods 6.0 inch.
SRP -5cc dish Pistons for 10:1 with 64cc Heads..
AFR 210cc Aluminum Heads 2.08 int - 1.62 exh valves.
1.60 Proform Roller Rockers.
Victor Jr Intake

The vehicle is a all steel 68 Camaro with TH350 Trans and a A1 3000 Stall with 4:56 Gears and ladder bar suspension..


What cam would work for my setup? Also how big of a carb should I be looking at..

I want to go 10's with this motor, Is it possible??

Thanks for any advise..

i had a very similar setup and everyone said a 1000cfm holley would do good.. take a look at the thread: http://www.camaros.net/forums/showthread.php?t=162055

the cam specs are in there also.. i talked to someone who had a very similar build to the one i was thinking of, and he was running in the low 10's all motor and mid-high 9's with spray

I would look at solid rollers of at least 250 @ .050 Cams, 750-950 Carbs, and 4500 stall converters. Also with 10:1 compression.... maybe a little N2O :D

I dnt5 have cam advice but I would consider scat or compstar over that eagle rotator stuff and comp or yella terra over the proform rockers.

I dnt5 have cam advice but I would consider scat or compstar over that eagle rotator stuff and comp or yella terra over the proform rockers.

Very solid advice!

Looks like you're building a stout one there. You're probably going to want a converter that flashes up a lot higher than 3000.

But yes..it is doable.....if it's not too heavy when you're done. What size tires are on it? Is it a Pro Street deal with the ladder bars and tall tires?


JIM

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Only advice i can give you is : Do not install proform roller rockers, they are garbage!!!

so will your engine once it destroys itself after a Proform rocker breaks apart !!!

You do not mention spring pressure, but Proforms can barelly take the spring pressure from a stock engine.

I also say no to the proform stuff. I wouldnt put them on my lawnmower. Dont skimp on your valvetrain and get good lifters too. I went with Jessel and crower lifters. I want to show you my combo since you are using the same heads. It just went 11.08 @124 on a 28x9 slick thru the mufflers. Its just a couple inches smaller than yours. Its a 385 and car weighed 3400lbs.
Do you know your cars weight?
Here is the link.
http://www.camaros.net/forums/showthread.php?t=165724

Very solid advice!

Looks like you're building a stout one there. You're probably going to want a converter that flashes up a lot higher than 3000.

But yes..it is doable.....if it's not too heavy when you're done. What size tires are on it? Is it a Pro Street deal with the ladder bars and tall tires?


JIM

It weights 3430 with driver... Its a ChassisWorks Ladder Bar set-up.. NO Backhalf..

I have M/T ET Drags 28x10.5 slicks

Yeah...I would go for

Super Victor intake
HP950
Soild roller.....260 or so at .050
11 to 1
1 7/8 headers
4500 stall

With 5cc dished pistons, I'm guessing flat tops with 5cc valve reliefs, and 64cc heads you will have a lot more than 10:1. You'll have 11.7 with .000 deck and .040 head gasket. You will need more converter too...

With 5cc dished pistons, I'm guessing flat tops with 5cc valve reliefs, and 64cc heads you will have a lot more than 10:1. You'll have 11.7 with .000 deck and .040 head gasket. You will need more converter too...
That's what I was thinking - you need -16cc pistons for 10:1 on a 408 - I building the same cubes now with a SCAT forged crank, procomp rods and SRP pistons - it's decked -0.010 so the machine shop picked a different piston to get to 10:1 but at .000 deck and -16cc it would have been 10:1 on the nose if I recall correctly.

you can download a program from comp cams called camquest to play around with configurations to pick a cam and get a simulated HP/Torque peak, average and curves to look at.

I agree, lose the Eagle stuff (if you can).
Scat is great, agreed on the rockers, comp pro-mags, I run yella-terra, a little noisy but they are tool steel (look just like comp pro-mags).
I would highly suggest 10.8:1-11:1, you can still run pump gas if you run a cam with 240* duration or more.
A comp 292/306 or larger solid roller would be good with 10.8:1-11:1.
Agree with the bigger converter too, a 3000 stall is probably only good for something like a cam with 280* duration.
1000CFM is BIG for a motor that will probably only put out 500+.
Get a cam with enough lift to support those afr's, you may want to look into a custom grind.