Prodigious

I have a 92 Z28 with a cammed 355 TPI mated to a 700R4 with the stock stall and a 10 bolt with 4.10 gears in it. I have to say, the torque from the TPI, the low first, and the 4.10s is astonishing. However unfortunately it also blows away my 245/50/16 tires. I would like to keep the 4.10 rear end gear ratio, but get a higher stall and do some intake modifications. I don't know what would be best for my setup though, keeping TPI and going for wider and stickier tires or simply getting a stealth ram. Either way I plan to go up on the stall speed, but I would like you guys' advice.

Also bear in mind please that I nor the previous owner have any idea what specs the cam the motor is running are. He simply said that it was not the stock cam but he didn't know the specs.

Sorry if this is not in the right category.

cuisinartvette

Stealthram

Prodigious

That's what I figured the best answer would be. Any particular reason you would recommend that?

86CamaroDan

I love my HSR. Though i have no idea what to gauge it from other than a carb. The power and response compared to the carb is incredible, much more top end, and throttle response, so you know where my vote is.

InfernalVortex

iTrader: (4)

What carb were you using?

bwmcam

What do you use the car for?

86CamaroDan

It was a holley 670 street avenger

SR71BLKBRD

iTrader: (1)

Id say stealthram with simple reasoning. I had a 350 tpi with stock 3.23 gears that I still couldnt launch. first through third I could get it in different directions. The low end torque is what the TPI is for. the long runner makes its low end power and runs out of gas top end. Im building my 383 to change the torque curve and give me a bit more on the top end. If you throw a stealth ram on it the low end with those 4.10s should get the hell out and itll breathe better than the long restrictive runners of the TPI on the top end.

BLWR PWR

MT drag radials. With 4.10s, the low 1st gear in a 700r4(3.07?), and a higher stall, say2800 or 3000, youll never get a launch on street tires. Doesn't matter what intake is on there.

Vanilla Ice

Suspension/tires. Any other answer is ...not the answer.

You're power level should have zero issue maintaining good traction with proper suspension and tires.

Prodigious

Thanks for all the answers guys, it really helps. Although I have the stock stall and some bfg gforce supercomp 2 245/50/r16 tires on, subframe connectors that I recently had welded in helped my launch TREMENDOUSLY. I also advanced my timing which helped top end. I currently have new Bosch injectors coming in as well as an AFPR to install that I'm sure will help further.

Back to the thread topic though, it seems that the general consensus is that I get an HSR as well as some drag radials to run at the track. Any different/additional suggestions? Maybe aftermarket LCA's?

Anyways I would just like to say with my current tires (however skinny) and my SFC's seems to be putting the power to the ground like a champ with the 4.10's. The car launches ridiculously hard right now compared to before, however it still needs a lot of help in that department. Although I'm positive the top end will benefit greatly from new fuel injectors as well as increased fuel pressure.

irocman7

I had an aftermarket TPI (Edelbrock bottom, SLP runners) and it seemed like the more I did to it the more traction problems I had. Especially once I swapped over to a T56. The torque made it felt great, but nothing compares to the way my Stealthram pulls up top. Night and day difference.

For your situation, you really need to match it to your combo. You need to find out the specs on the cam, so you can match the rpm range to your intake.

Prodigious

Is there a way I can find out the specs to the cam without pulling it out?

Orr89RocZ

iTrader: (20)

Hands down stealth ram will out run tpi with those gears and a cammed car. Up the shift points

Steve Mack

iTrader: (5)

FI Tech EFI.Good to 600 HSP.

irocman7

Most aftermarket cams have grind numbers on the front or the back. If u pull it out you can check the lobes with a caliper.

Orrs right though with what you know now Stealthram will out run any TPI setup. Cost is about the same for both intakes. Also, tuning is going to be as important as the intake in reality.

Prodigious

So stealth ram and learning how to tune will be the biggest things I should do at the moment?

irocman7

That all depends on your budget, and what your goals are. The part that would help you better plan the combo out is finding the unkowns are. Like what cam is in it.

Tires will probably should be high on the list to help u the most. 411 gears with 700r4 is going to be a challenge to launch period.

I always thought it was good to start tuning before you do a lot of changes, of course I started learning after I did the topend.

Steve Mack

iTrader: (5)

The FI Tech fuel injection system is self learning .It sells for under $999.They always tell you how easy it is to learn to tune your Camaro on this site.But it never is.

Vanilla Ice

The factory Ecu is self learning and free.

Orr89RocZ

iTrader: (20)

255 drag radial will handle that setup at the track. Street, it will help first gear but it wont take all of throttle til higher in rpm band.

I like the 730 ecm. Its not super difficult to learn it. Just need to get your feet wet and ask questions. People will help as long as you make an effort to read as much as you can

Wideband o2 is a must imo. Will make the process easier, and really is the best way to dial in wot. Get it right on the street first before dyno or track tune. And by right i mean get it in the higher 12's to 1 ratio as a baseline. Rich/lean from there.

Steve Mack

iTrader: (5)

Yea right.Try putting 30# injectors in and see how well it self learns.You'll flood your motor with gas and melt your catalytic converter.

Orr89RocZ

iTrader: (20)

Theres a way to set up spreadsheets to do ve learns based on some wideband data and copying your datalog output but i dont know of a way to make that on the fly.

Code $59 has a way to do closed loop wideband control but i never attempted it

Vanilla Ice

So you've done that with the computer you're advertising?

That's pretty cool that a computer can read your wot fueling, optimize timing, and adjust injector constant while knowing it needs to do so. Is it made by skynet?

Vanilla Ice

With enough free ram space you could create a 3d LU table in ram FOR VE and write a subroutine to alter it as needed based off wideband Input.

I almost started this on my last ecu hacking project. Instead I concentrated on flexfuel as I lived next to an e85 station.

Orr89RocZ

iTrader: (20)

But there isnt enough free space in a 730 8D chip let alone a smaller 6E 165 correct?

Vanilla Ice

You'd have to be able to do the nvram add on for that type of thing.

Steve Mack

iTrader: (5)

Yep it sure can

big hammer

Everything sucks a it TPI for a performance car except how it looks. They should have just put it in a truck.