GTAmazing

I just finished this new manifold...I is a Wieand Tunnel Ram converted to EFI. I designed the plenem myself and had a local fab shop build it for me. My question is about a new cam...What is the biggest cam I can use with a stock computer with a chip in it. The chip is an older ADS Superchip. The car is a '87 GTA with a MAF sensor and the motor is a rebuilt 350 with '87 vette aluminum heads and hooker long tubes with flowmaster exhaust. I have a TCI converter already with around 2200-2400 stall and 3:42 gears. Any help or suggestions would be great.

Cadillac

Welcome to the forum. You ought to be able to contribute a little to the group.

Stekman

Look at the Comp cam Extreme Energy grinds for EFI. Pick the one that best fits your setup, lift clearance allowing.

Dante93GTZ

iTrader: (5)

What did that puppy set ya back? It'd be nice if we could all fab our own intakes like that

Roostmeyer

iTrader: (3)

I ran a 218/224 on 110 LSA with my old combo and it ran out fine, I bought all the equipment, but it really didn't need much at all. I pretty much raised the idle and added a little more fuel at idle. Then again that was with a stock intake. With a scanner and an adjustable fuel pressure regulator you can probably get it pretty close, but with that intake and any different cam, you're going to have some issues without a new chip.

A milder cam like my old one, and that intake would probably be pretty easy to tune. I guess the only way to know is to build it and see how it runs. Then again if you can afford the equipment and will be getting it anyway, get a bigger cam and tune around it.

edit: :hail: :hail: Nice intake :hail: :hail:

Orr89RocZ

iTrader: (20)

comp cams compucams 210/220 .500 inch lift works great I hear. That intake you got looks nice, sorta stealth ram like. Yours looks taller. To take full advantage, I would recommend better heads and larger cam. Any cam for stealth ram should work good. I bet the lingenfelter TPI cams would work good too, but might need a new chip to run right.

1989GTATransAm

iTrader: (3)

WOW!!! Very nice. I agree the above posts in that you should also get some head work done. You need to take advantage of the flow potential of your nice intake. The ZZ9 cam would work good.

IMHO as long as you have a cam of medium duration and over .500 lift you will be good horsepower wise. Your power will be made in the heads.

You also need to fab up a cold air intake system as the intake track on the Trans Am is not the best and will hold you back. I used the LT1 elbow from Summit on mine. Sounds like your exhaust is up to speed. Make sure you have a good wye and not a stock one in your exhaust system. Allen

GTAmazing

I've been leaning towards the LT4 Hot Cam cause I've seen it in plenty of engines before and it seems to make good power. I've seen on E-bay copies of the hot cam ground on different LSA...whats the deal with that is one better than the other. I think it was 110 or 112...would one be easier to tune. Also if I step up the cam is it necessary to get larger injectors. I am using the stock 22# injectors now turned up to about 40# fuel pressure.

By the way my friend has a brand new ZZZ roller cam thats .480 lift and 235 @.050 duration on the intake and exhaust witha LSA of 114. I could get it real cheap if it would work.


A brief piece about my car and me

http://www.cardomain.com/id/gtamazing

brutalform

nice welds. your runners are way shorter than a tpi, i guess they fall somewhere in between the miniram and the superram, leaning more towards the miniram. right there, that will allow a larger cam, with about a lift in the .560 range, (clearance permitting) and duration in the 228 @ .050 range, to let the engine achieve the higher rpms that the intake will allow. maybe 230 @ .050 with a 383. with a c/r of about 10.5 and a good set of ported heads, you maf should not have a problem managing the air. they are more forgiving than a speed density. i would even consider a solid roller. i have a tight lash comp solid in my car and the lashes are way less than the other cams ive seen. with a stud girdle i adjust my valves once a year in the spring. take advantage of the rpm possibilties with that manifold....tom

92GTA

iTrader: (11)

Custom fabbed manifold.....:hail: :hail: :hail: :hail:

Great design too, very simple and clean but appear it would be VERY effective in both lower and mid to upper RPM ranges.

BTW, you must have one hell of a hood on that GTA...

NastyL98_T/A

ZZ409. Don't be lazy....tune it

cali92RS

The higher the LSA, the easier it will be to tune. That manifold is a monster. The idea is to match a cam with your intake, gears, torque converter, heads, etc.
I see a couple of problems. I think that intake will like a cam thats makes power past 6200. It will probably be a dog before 2000 rpm, which is high for your current torque converter and rear end gears. You can forget getting a cam like that to work on a stock tune. You're also going o need at least 24# injectors. YOu can get a cam with a lower powerband, but it defeats the purpose of having an intake like that.

David 91RS/Z28

Cali92RS took the words out of my mouth. With an intake like that you need to be looking at a great set of heads, healthy camsaft(230-240ish .560-.580ish) and plan to go up on the stall(at least a 3600). DFI would be optimum obviously, but good tuning on the stock PCM will be sufficient. If you don't want to run a setup like this, you ought to look at a different intake. BTW, very nice intake. Just be sure to setup the motor to match it or you will be all show and no go. Good luck!