One of those annoying "what kind of power am I making" questions...i know i know. I know someone on here was running a similar set up. I'm guessing itll make in the ballpark of 275hp/345tq to the pavement....but anybody got something similar?


-350 bored .30 over to a 355
-K&B Claimer Domed(popup)hypereutectic pistons
-Comp Cams Roller Cam - 224I,230E @.50/
.513"I,.520"E
-Comp Cams roller tipped rockers (1.52:1)
-Comp Cams 1.437 dia duel valve springs
-Comp Cams locks, retainers and 11/32 teflon seals
-Heads resurfaced and machined to accept cam hardware
-Ported stock cast iron heads
-Heavy duty push rods
-Underdrive pullies


Intake and fuel
-Stock TPI upper and lower intake
-K&N filters
-Holley Twin 58mm throttle body
-Gasket matched intake ports, and throttle body body ports
-BBK adjustable fuel pressure regulator (35-70 PSI)

Exhaust
-Heddman 1 5/8" shorty headers
-Heddman 2 1/2 inch Y pipe
-3 inch custom catback with 3.5 inch chrome tips

Ignition and computer
-Taylor 8mm wires
-Accel 300+ digital ignition
-Accel performance cap and rotor
-MSD Blaster coil
-Mallory coil wire

Transmission and Rearend
-Corvette Servo
-3.73 gears
-Aluminum driveshaft (coming soon)
(needs to be rebuild to handle the torque)

Suspension
completely stock...upgrades coming soon.

 

your setup looks like it would probably make about that much hp. can i ask you why you have such small tube headers on it though. 1 5/8 seems pretty restrictive, especially for a 350. you are probably robbing yourself of some hp there.

 

yea i plan on switching those out soon. Alot of the work done to the car was already done when i bought it (the headers were already on there), but it had a spun rod bearing. Plus the previous owner did alot of stuff half assed..for instance he converted it to a single cat car with the hedman headers and y pipe...etc etc

I wanna get some long tubes soon

 

that cam is very big for stock TPI... thats gonna hold u back alot and gonna need a good tune to run right

but power numbers look right.

fully upgrade TPI with good heads on that setup will do over 300rwhp

 

Not only stock TPI, but stock heads.
Your not gonna get nearly what you want with those chocking your engine.
Also the car is going to run horribly (if at all) with a stock chip. My car still has drivability issues with the same cam and I have 10 burns and counting.

 

I wouldn't "swap out" those headers so fast. 1 5/8 is a great size for your tpi motor. Going to a larger primary tube is just going to "knock the wind" or kill the bottom end torque in your tpi motor. A 1 3/4 or larger primary for a small block is really only needed in something making, say 450+hp and buzzing way past your 5500(max!) tpi's power band. I've owned 10 second small blocks and never run anything larger than 1 5/8 primaries. Your headers are more than capable of handling everything your "oem" heads can ever throw at them. A tpi motor is all about torque. So are those headers. Look at the whole picture of your combination. You could probably use that money better elseware.
Just an educated exhaust guys $0.02.

 

With better heads, modified TPI but a much smaller cam I'm running 304RWHP. The ZZ9 cam is 212 degrees on the intake. See signature.

 

yea the car pretty much does run horribly, but like i said the car had all this work done already, when i rebuilt the engine though, the machine shop guy said the cam was ok for the car. I mean it doesnt run horribly, ive just been having some minor problems lately, mostly vaccum leaks and ****, but when i get that all sorted out, ill tell you how it runs

 

Since the stock heads are ported, I would use them for now. That intake has got to go! Consider a S/R, or M/R. Plain and simple, the engine will fall on its face with that intake. What is the LSA of your cam? That cam has a bit of duration, but you can get it tuned, if you want to invest the time in tuning. I agree with Rob, as the headers are fine. The "pop up" pistons are another thing that should have been done differently. What is the C/R?