I have a 1991 z28 350 tpi. It is bored .60 over and its got performance headers, performance intake, and some flowmaster cat back exhaust that is kind of too quiet for me. What would be my next step if I want to raise my hp/torque(mostly torque )???
and how much would it take to get it up to 300 rwhp??

 

put a cam in it, and you should be at 300RWHP.....headwork and cam you could be in the upper 300's...

 

What kind of cam do I look for? I don't really understand the whole 3000-5000RPM range and all of that. Would a cam make my car sound any different?

 

the RPM range is where the cam will make its power. Remember that most TPI setups dont' make any power past 5000rpm. If you get a radical cam it will make your car idle lopey but that will mess the computer up unless you can modify the prom. And generally a radical cam makes power outside of the range of a stock TPI. I went with an XE256 grind from Comp Cams (PN 12-234-4) But I haven't gotten it installed and since its still winter in NH its not going to be running any time soon. I've got swirl port heads, true dual exhaust with super 40's, 1000cfm K&N air filter and a stock TPI setup on a 350 (from '74 so it wasn't a good home for a roller cam setup). Your block is setup for a roller cam so that cam won't work for you. If you want your car to sound different you want to look into a new set of mufflers ( most people prefer Flowmaster if you want a throaty ballsy sound). Compression will also change your sound and upgrading to a new set of heads can change your compression and get you more power. I hope you got something out of this half rant. Good luck

 

Well my car is bored .60 over and I do have a flowmaster muffler that splits off into two tailpipes, but i'm not really satisifed with its sound as its too quiet when you get on it oddly enough. So then if i'm looking for a cam I look for a roller cam with like...what kind of RPM range? 3000-5000RPM?

 

no, you'll want a cam that makes power in the 1000-5500 range. As for the exhaust being quiet. The stock setup is normally quiet (single pipe running into the muffler and going into dual outlets). I have dualds from the headers back and I have ****ty dynomax mufflers and it still sounds pretty good (though I'm going to be buying flowmasters before the car is put back on the road). the only downside is that if you chose to do a dual setup you'll probably need to get cats for it because of emission laws which is a pain. But Flowmaster will give you the most aggressive sound of any muffler currently on the market.

 

The only problem with that is my local exhaust shop won't put on true dual exhaust on a camaro for some odd reason they say its too hard or something(kind of retarded). But I heard the cat-back Hooker exhaust and I thought it sounded pretty badass...maybe it could just be that my flowmaster isnt designed to be a loud one or something. Going with a different flowmaster could be a better solution? If so whats the best flowmaster you know of for a camaro? Also I heard Borla and I liked that too, but I do want the most aggressive sounding wh en you get on it, I don't want to be driving around at low RPMs sounding like im flooring it...

 

I'd look into the zz4 cam its mild but alot of people like it. No matter what cam you get you will need to tune it since your car is speed density. I'm looking into zz4 or the Comp cams 304-8 ( i want to stay emissions legal). I also bought all the stuff for prom burning from moates.net so i can get the best result from the cam swap and get it to run good.

 

Check out the diy-prom board and read all the stickies. It will be well worth learning in the long run.

 

yea no matter what you do, you'll end up fine tuning your computer to get it running the way you want it....as for exhaust, it sounds like you have the flowmaster crossflow 80 series, which is one of flowmasters quietest mufflers, but can sound pretty mean when you put out more power....usually it isn't the muffler that makes the noise, its the motor/heads....you can put a 40 series muffler on a stock 350, and it'll sound good, but put it on a build up 350 or 383, it'll sound totally different...your motor is what dictates the sound/loudness of your exhaust....it is hard to run duals on thirdgen's just because of the layout undernieth...however it is not impossible, a fair share of people have done it, and i'm about to do it myself...i would say its almost impossible if you need to run cats, unless your car was setup up for dual cats....i don't have this problem cuz i'm leavin the cats off...good luck with whatever you do, i have no idea on what cam would be good for you, because i'm not very knowledgable when it comes to cams...there are tons others on here that know what they are talking about when it comes to cams...

 

So if I were to get a new cam, I would HAVE to tweak my computer chip?

 

In order to optimize the performance and get everything from the cam, tuning will be required. You can probably get away with not tuning the car after the cam, but it is not advised.

 

Yeah to get it to run to its full potential. But if you run a bigger cam you will need tuning to get it to run right. I Just purched my stuff for prom burning so i still have alot to learn. I decided to learn how to burn chips before i get a new cam. So after i learn how to tune i'll be gettting new heads and cam.

 

Would I have to burn my own chip, or would a shop do something like that, cuz it's not like I'd actually put the cam in myself.

 

There are people that do it and its not cheap to do. Whatever you do....DO NOT buy an off the shelf chip from Hypertech or someone like that, I am sure most everyone posting in this thread will agree with me on that.

 

Learn how to burn your own chips, you can get all the stuff you need for like 250 i went and bought a kit from moates.net for around 400 but you don't need to spend that much. It is well worth it because you can have alot of diffrent chips to see what works best. At first i didn't want to get into burning my own chips but then people on this site convinced me to do it. If you have someone do a custom chip they usaully charge 350 and up so you will be saving money.

 

my biggest worry is ****ing something up cuz i dont really know **** when it comes to engines...ESPECIALLY about the computer, Hell, I don't even know where the computer IS

 

And don't do mail order either how is someone gonna tune a car without it being infront of them ? Every car reacts diffrent to mods and some places charge alot of money for them and alot of people say there cars run alot worse with there mail order "custom" chips

 

Yeah im definately gonna find myself reading up on burning my own custom chip, but I just don't really know nething about the computer itself. If the chip I made was somehow wrong, could my entire engine be ruined if i messed up the chip enough?

 

I don't know that much either but im learning. Just downlaod tuner pro rt and a bin and look at all the stuff you can change it becomes a lil more clear when you see a bin i'll post links where to d/l every thing in a sec. doing this helped me alot

 

Thanks man cuz there's nothing i'd love more than to beat my buddy's LT1 '95 camaro down at the drag strip in a time trial ...
(or on an empty highway by my rinky dink town)

 

http://tunerpro.markmansur.com/ go here downlaod tuner pro rt. then go to ecu/bin defenitions and d/l Super_8dm2.ecu then go to here and d/l the aujp_8d. Once you install tuner pro go to the top where it says ecu and open the super_8dm2.ecu file from where ever you d/l it to and then go to file then open bin and open the aujp_8d file. And just take alook at all the things you can change. I would first look at the constants you can change your rev limiter there and fan on temp. This will help you under stand a lil better. I would also read all the stickies in the Diy_prom board they helped me alot.

 

91 Z28 350....how do you d/l Super_8dm2.ecu? When I go to bin/ecu definitions and click on it, it opens a page that has everything typed out in it...won't let me d/l it.

 

right click save as thats how i got it to work

 

Thanks...that worked

 

That **** made no sense to me...its like a foreign language...I'd rather just have to pay to have someone do it..

 

i also downloaded all the crap, what else do i need to tune my own car? a laptop and a ALDL connector?

 

buddy, its all patients....its just like anything else, its gonna take a while before you get a hold on it...i've been askin questions about it for the past months, and I still dont' completely understand what i'm doing or have to do...just get all the stuff you need, and go play with it..thats what i'm gonna attempt to do...its lot cheaper than 400 to have somebody else do it...

 

I think that 400$ is worth the mental anguish it would cause me lol. That and if I learned how to do all this, I'd also have to learn what the hell everything in an engine does...which I really don't wanna invest my time into...

 

Go to Moates.net they have every thing you need to starts burning your own proms. I got the APU1 AutoProm. there is also thing you can get so you don't have to unsolder your stock chip like the g1 adapter. There are other places you can get stuff to burn your own chips. read this it will help explain what you need to get started

 

KyleZ28 I was saying the same thing at first but then i started reading on the Diy_prom Board and decided to try it.

 

Its either 200$ and then do it myself. Or an extra 150-200$ to have someone do it. I don't know anything about cars enough to try this stuff on my own...I guess I could have my dad help me he IS a mechanic, but he works on foreign cars

 

And then every time you do another mod to your car you can get the most out of it by creating a better chip.

 

Or I could just jump off a bridge and say **** it.

 

thats cool to i guess

 

I would hold off on changing the PROM chip until you have made all the physical changes to your intake/engine/exhaust systems. The best advise on burning chips yourself would be "a mans got to know his limitations" - Dirty Harry. If you do not feel comfortable acquiring the equipment and spending many hours of learning and then many hours of trial and error then get someone to do it for you. Do not buy one off the shelf, have one custom burnt. If you think you can and want to learn PROM chip burning then go for it. I am struggling with that decision right now. If you decide to have someone do it for you research Jet or Fashchips. They require you to fill out a form documenting all the changes you have made to the engine. If I go this route I will have them talk to my mechanic as they burn the chip. The cost seems to be in the $400 range, which is only a couple hundred dollars more than the equipment to do PROM chip burning. However, if you do more engine enhancements and need a new chip then it is another $400.

 

As mentioned above....Fastchip does have a "Custom Order Form" on their site that has to be filled out when you order a chip from them. Ed is a really good guy and very knowledgeable. He has been in the business probably for longer than I have been alive. I have yet to hear of anyone being disappointed with their car after he got through tuning on it. If you would like to talk to him about programming for you, give him a call.

FastChip
Ed Wright
918-446-3019

You will most likely end up talking to John, but if you can ever get past him and talk directly to Ed you will be doing good. John is up and coming and will probably take over the business when Ed gets out of it. John is really knowledgeable himself, as he has learned what he knows from Ed