Gonna build some cheap power!!

[BadAzzGTA89]

Ok i wanna know if this combo will be better than building what i already have as far as $$/HP ratio goes??

1973 400 sbc

202 heads. 2.02 ex/1.60 intake

Cam is a comp cam is

Part Number 12-243-3
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS X4 270H-11
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.48 0.498
Duration At 0.006 Tappet Lift 270 278

--------------------------------------------------------------------------------

Valve Timing At 0.006
Open Close
Intake 28 62
Exhaust 74 24

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 107 Intake CL
Intake Exhaust
Duration At 0.05 226 234
Lobe Lift 0.32 0.332
Lobe Separation 111

--------------------------------------------------------------------------------

Recommended Valve Springs 981-16



Eldabrock performer rpm intake

and a holly 600cfm 4brl

[BadAzzGTA89]

So how much power will that give me??And i will use the stock GTA drive train 700r4/327 rear borg warner?All to start with!!

[Prince Valiant]

Difficult to say without having a good idea about how much cranking cylinder pressure the engine is developing (IE, hopefully it has a fairly decent compression ratio)

With a cam like that, you'd ideally like to get around 160-180psi cranking compression.

But say that it's suitable, and at least 8.5:1, you've got a fresh 3 angle valve job, decent exhaust/headers/ etc....I would think you would be pushing ~ 330 hp or so...problem is the carb. This motor would probably work best with around 700cfm carb ideally. Not to say that a 600 is a bad carb on a 400, just it'll start to get winded a little on the early side, probably cutting into the fun ~ 5000 rpm depending on your vehicles volumetric efficiency (I assumed 100%). Ideally you would want to cam it for that...but the cam you've selected would probably let you run it over 5500+ without too much fanfare...so the 700cfm would have you covered nicely.

But that should be a 350+hp motor easily, with very good driveability and vacumn to power your brakes, etc. Easily enough to put you solidly in the low 13's high 12's....maybe mid 12's with an optimized combo.

[Syclone0044]

Chevy 400? Now there's a man after my own heart!
What did it cost for the core engine?

[BadAzzGTA89]

Chevy 400? Now there's a man after my own heart!
What did it cost for the core engine?

I can get it from my brother and it is in his garage.It had a stock rebuild done to it also and he has the parts i listed installed on it. And had it in a 81 gmc step side that came with a straight 6 with the 3 on the tree and put that in there with the 3speed and stock rear gears with duels with the scavanger pipe and the focker moved!When it finally hooked!!!I just wanna know would that be a wise setup to use in my GTA instead of redoing the L98??Price and power wise???Then what trans and gears??Help a brotha out here someone!!

[Prince Valiant]

I see no problems going to the TA

[BadAzzGTA89]

I see no problems going to the TA

I know it will work but is it worth it??And whar rear trans combo??

[Prince Valiant]

You've got an auto right?

If that's the case, it should be fine with a slightly higher than stock t/c such as one that stall in the 2400-2800 range...

Paired with 3.73's that motor would be ideal

[Crawlin]

10 bolts suck, we all know that.

no replacement for displacement

i agree with chris with a slight stall. although since it really isn't a top end type setup, i'd stick with something a bit smaller in the 2400-2600 range. especially if sticking with the stock rear gears. wouldn't seem too loose for ya.

3.73's could wake it up some more.

sounds like a fun and easy combo to throw together with stuff you have laying around!

Chris

[loud91rs]

you don't want a 400...you want to do a big block and sell the 400 to me...haha. anyways, a 400 would be cool in your car, go for it!