1991 Z28 Camaro

[92CamaroRS]

Actually TPI will work great on a 350, GM put TPI on thousands of 350 camaros, if you do use TPI on your 350 the main thing u will need is larger fuel injectors, so you would have to go to an autoparts store and just tell them you need injectors for a 1991 z28 with a 350, not to hard but probably will cost ya. I am sure theres a few small things besides that but I believe the TPI system is pretty much the same between the 2

[rubasteve]

When the guy I bought the car from had it, he upgraded pretty much everything for a 350: 24lb injectors, 58mm throttle body, PROM, stuff like that.

[shawnc16]

I would throw a stealth ram on that car, cheapest thing to do if yur gonna keep it fuel injected.

[rubasteve]

where can I buy a stealth ram system for cheap?

[shawnc16]

Get on Thirdgen.org see if anyones selling one or Summit has it too.
Thunderracing.com is where i got mine

[97rs4life]

where can I buy a stealth ram system for cheap?

From me, lol,

But really the cheapest would be like on thirdgen.org used. I can get it new as well but it will be a little more money than finding one used.

[89kicker_iroc-z]

Ok sorry for the delays ive been really busy lately with summer classes and working on putting my motor back in the car

Anway, im just gonna start throwing out information about what ive read you guys talk about so far etc.

58mm throttle body = waste of 400 bucks for a 350.
You will NEVER need a throttle body that big on a small block, EVER.
If your ATI procharge your motor and stroke it to a 427 then you MIGHT need a 58mm throttle body, and BTW GM MAF/SD computers get crazy ass readings and idles with a 58mm tb on them, you would prolly need extensive tuning or accel dfi or commander 950, fast etc.

GM crate 502 motors come with 48mm throttle bodies...whats that tell you

24 lb injectors is overkill on a stock tpi 350, way to big, not to mention just sticking the suckers on there is gonna make you run extremely rich since the computer thinks stockers are in when it squirts them.

Who ever said 350 TPI is a good setup, sure it is. If you want torque, cuz thats all your going to get.

TPI was engineered to work on a 305 which would never need a crapload of air to get pushed through to make a decent amount of power.
When it was at its peak, they managed to pull 230hp from a SD 305 TPI 5 speed which is excellent.
Now the 350 option was a last minute thing GM did to compete more with the 5.0 5 speed mustangs, but when they did it they wound up almost choking the motor. Thats why they cant breathe past 4,700rpm, and will never get higher...ever. The LT1 was almost the opposite, shorter runners and longer plenum making more hp and less torque.

If you put an LT1 and a TPI side by side and let em loose, the tpi will shoot in front immediately, but after about 4 seconds the LT1 will catchup and youll get nothing but taillights.

As far as intake swapping, the holley stealthram is directed towards 3,000-6,000rpm

the mini ram (is similar but NOT the same as an Lt1 intake..it revs higher) is geared towards 3,500-7,000ish

and the accel supperam is a waste of money and time to even talk about since its heavily outdated and doesnt do much for performance.

IMHO i prefer the stealthram, basically because my motor is setup to go from 3,000-6,500
I have a 2,800 stall, and lt4 hotcam which is a 3,000-6,000 cam, and my afr heads are designed to run the same thing but up till 6,500 w/hydra rev which is why i got the HSR.

the miniram is more high end and would work better with an even higher stall, a high revving cam, and similar heads... its also like 500 bucks more than the stealthram.

And as for your car falling on its face i told ya it would.
The most hp your going to get out of a n/a 350 with fuel injection is going to be around 350 at the wheels with good flowing heads and either a miniram or a HSR.

[rubasteve]

Ok, first thing

Yes, the 58mm throttlebody is overkill for a 350, but the good thing is that I didn't buy it The previous owner had it on when it was a 305!

As for the injectors, I'm not running rich, but I am not quite sure on how big the injectors are, that is just what the previous owner told me. He could be bullsh-tting, he could not be. Sure the injectors could be overkill on a stock 350, but my engine is definately not stock.

The TPI system choking up the motor, I heard a really good analogy about this. "Using the TPI on a 350 is like having micheal johnson running the 200m dash as fast as he can while breathing through a straw" I forgot where I heard it from, but it illustrates the point.

The intake system definately has to go, but for now, it'll do. I do admit, you warned me about my engine not getting its peak performance, but I can beat LS1s, and thats good enough for me for right now

[shawnc16]

I just witnessed an 85 iroc with a 350 TPI run 12.80s today possibly quicker but thats what i seen. NO POWER ADDER! So if this guy was to hook up the bottle who knows 11s.....

[gforlife56]

89kicker_iroc-z man that car looks good as hell