92 rs mods advice

[Aphex]

a great place to ask bout camaro mods, uve guys helped me b4 with rear end gear and im wonderin if u guys can give me any more advice on performance mods i can do....heres what ive done so far....i have a 92 rs 5 speed, 305 tbi 5.0L....got hypertech chip, 160therm, 2 fans, fan switch, k&n filter, dual air intake, edelbrock intake manifold, new exhaust, got a 3 series carrier with a 3.73 gear (which u guys helped me out bout what my stock carrier n gear was)....eventually gettin edelbrock heads hopefully within a month or so....any suggestions, comments, advice would be great....thanks....

[Genopsyde]

I didn't see headers mentioned, and a Holley TBI

[4onFloor]

sounds like you got it down pat. i bet 3:73's with a 5spd is a fun ride. and ya go with genopsyde and get a holly tb. they make a 670cfm throttle body which is substantially bigger than stock, and i think it plugs right in. oh and if your gonna pull the heads you might as well swap cams while you got er apart

[drvngstorm05]

if you are getting new heads, while your at it get some more valvetrain mods. roller rockers, tense valve springs (if the heads don't come with), get some hydraulic roller lifters (if you don't already have them) and a comp cams grind. all of that would be a good combination

[4onFloor]

yup it's already got roller lifters

[Aphex]

yeah the 3.73s are a lot of fun. thanks for the help, all i need now is the money, of course after my 2 year clutch died on me....oh well

[89IROC&RS]

well if money is an issue, might i suggest a set of vortec heads??? they are bone cheap, especially if you get em from the junkyard, flow more than stage two bowtie heads stock, and with valve jobs, port and polish, and 2.02/1.60 valves i have heard they are absolute terrors. just have to buy a new manifold for the diff bolt pattern on the intake. but exhaust is well worth it. i just put edelbrock TES headers and flowmaster exhaust on my IROC and DAMN what a difference. desktop dyno says im runnin 280hp, and its normally pretty conservative, but id say 260-270 is probly much closer to reality.

[89IROC&RS]

oh and i myself have a set of vortecs out back, just waiting for me to buy the vortec/tpi intake, and have em worked over, and they will be my next mod to the car, well, no, my torsen with 3.23's is next but right after that, the intake and heads, and oh baby its gonna be a ride

[Twin89s]

2.02/1.64 valves WILL NOT FIT A 305!!!!
Largest you can go on a 305 is 1.94/1.50

And all of chevys V6 V8's after 87 were hydraulic Roller Setups... which means no gear drives.

My suggestion is this.
650cfm carb 4bbl (TBI sucks you will learn this)
Torquer 305 (58cc) heads (cheap but do a pretty decent job)
Get rid of those stock exhaust manifolds
Get a nice dual plane intake. (performer RPM is pretty good)
Get a decent cam (XR276 or something like it)

And start toying with LS1's.. (stock but still)

But expect that glass T5 to blow at these power levels!

[1992RS]

Ummm well. As far as valves, and heads I agree with twinn. But as far as the tbi sucking, you do NOT want to have this discussion with me. With the 305 not stroked, I think the best cam for you would be the edelbrock performer rpm cam. It's a pretty roudy monster. Edelbrock TES headers and flowmaster cat back for exhaust. Holley 670 TBI, custom chip. I stroked mine to 335, well it's a bit more than that because I had the block bored. But if someone tells you that the TBI sucks just kick em in the balls.

[Genopsyde]

Don't forget about keeping it street legal, some of your suggestions just might not be possible.

[Twin89s]

Some of the carbs have provisions for remaining legal. TBI does sucks! Its a glorified carb!! With all the money your going to dish out to stay tbi and prolly run high 13's at best. If you dont have to worry about emissions just keep your cats (federal law) get non a.i.r headers delete your a.i.r pump get a nice 650cfm 4bbl carb. And why Flowbastard exhaust? Why not Edelbrock or Hooker or spintech? Every bastard out there has Flowbastards. I have hooker on my 89RS and it sounds so much better!!!

This cheaper setup will blow the doors off of a 305 with a 2bbl tbi unit.
If you want to argue go on www.thirdgen.org www.mofba.net
They will more than most likely repeat what I have said. TBI IS JUNK!!!

[v8punk]

Originally Posted by 1992RS

Ummm well. As far as valves, and heads I agree with twinn. But as far as the tbi sucking, you do NOT want to have this discussion with me. With the 305 not stroked, I think the best cam for you would be the edelbrock performer rpm cam. It's a pretty roudy monster. Edelbrock TES headers and flowmaster cat back for exhaust. Holley 670 TBI, custom chip. I stroked mine to 335, well it's a bit more than that because I had the block bored. But if someone tells you that the TBI sucks just kick em in the balls.

TBI isn't even a glorified carb, its a crappy attempt at making a fuel injection system based on 70s technology. No offense, but I don't think someone who strokes a 305 instead of throwing them in the dumpster where they belong should be giving advice on which induction sucks and which doesn't. a 305 bored out to .060"+ still can't accomodate any valves larger than a 1.94"/1.5" so making a motor that is stuck with an airflow restriction LARGER is just a waste of money, cause mod for mod, the 305 itself wouldn't be any slower. That aside TBI DOES suck, it is nothing more than a computer meddled carburetor. it doesn't give better fuel economy than a carb and its not any cleaner to run, and because of their design, fuel will build up on the intake runner walls rather than getting the proper amout to the engine (look at an EFI system, the injectors are right on the intake runners for the heads so they don't have to travel much distance yadda yadda). if you are going to go fuel injected, get an EFI multiport system (NOT a TPI junk but a stealth ram or a miniram of some sort). If not, get a carb, toss the computer and load of useless sensors.

[4onFloor]

Originally Posted by v8punk

TBI isn't even a glorified carb, its a crappy attempt at making a fuel injection system based on 70s technology. No offense, but I don't think someone who strokes a 305 instead of throwing them in the dumpster where they belong should be giving advice on which induction sucks and which doesn't. a 305 bored out to .060"+ still can't accomodate any valves larger than a 1.94"/1.5" so making a motor that is stuck with an airflow restriction LARGER is just a waste of money, cause mod for mod, the 305 itself wouldn't be any slower. That aside TBI DOES suck, it is nothing more than a computer meddled carburetor. it doesn't give better fuel economy than a carb and its not any cleaner to run, and because of their design, fuel will build up on the intake runner walls rather than getting the proper amout to the engine (look at an EFI system, the injectors are right on the intake runners for the heads so they don't have to travel much distance yadda yadda). if you are going to go fuel injected, get an EFI multiport system (NOT a TPI junk but a stealth ram or a miniram of some sort). If not, get a carb, toss the computer and load of useless sensors.

1992RS is pretty much a guru when it comes to TBI 305's and i highly doubt that any of your carburated vehicles would run with it. and guess what moron...EFI if tbi,and TPI. same thoery except the injectors are in the manifold on a TP instead of above a throttle plate, which if fact, actually creates somewhat of a tunnel ram effect. and if you devide the lb per hour of 2 tbi injectors you get the equivalent of TP injectors. while i will agree that the stock throttle body is a restriction and more less breathing through a straw, a 670 holley tb costs the same or less as any good carb. people like you just dont have to brains to use an ohm meter and test 6 sensors, so in turn you swap intake and carb and call yourself a mechanic. and if you do a little reading on the internet you'll find that tbi makes more low end power than tpi. tpi starts making power at about 1500rpm

[v8punk]

Originally Posted by 4onFloor

1992RS is pretty much a guru when it comes to TBI 305's and i highly doubt that any of your carburated vehicles would run with it. and guess what moron...EFI if tbi,and TPI. same thoery except the injectors are in the manifold on a TP instead of above a throttle plate, which if fact, actually creates somewhat of a tunnel ram effect

Wrong, not at all you stupid shit, there is no "tunnel ram effect", wtf kind of keyboard physics bullshit is that? a multiport system sprays fuel directly into the intake runner of the cylinder head, a TBI sprays it into the intake manifold first, thats MORE distance it needs to travel and unless you've ported the fuck out of that intake, thats MORE places for fuel to accumulate. it is the same theory as a CARBURETOR only it has a computer attempting to control the AF delivery rather than the carburetors assortment of screws and jets. you might as well call TBI guru the guru of slow cause thats about all he's good for.

and if you devide the lb per hour of 2 tbi injectors you get the equivalent of TP injectors. while i will agree that the stock throttle body is a restriction and more less breathing through a straw, a 670 holley tb costs the same or less as any good carb. people like you just dont have to brains to use an ohm meter and test 6 sensors, so in turn you swap intake and carb and call yourself a mechanic.

hey shit-for-brains, I've got EFI and I trap 120 MPH in the 1/4 with my car along with getting a daily driving 30 MPG. I am saying TBI is a just a carb that costs a lot more and wastes a lot of time and money to tune. What does your POS run? 14s? maybe a 13.9 and you are excited about it?

and if you do a little reading on the internet you'll find that tbi makes more low end power than tpi. tpi starts making power at about 1500rpm

now you are net racing. that is really funny because when I had TPI on my IROC (also another POS induction system) I would rip TBIs out of the hole like no other and keep pulling on them like crazy. stop magazine racing, stop throwing around internet factoids and bullshit you read on a website as fact. TBI is garbage. if you want EFI, get a multiport, if not, get a carb, its less of a headache than the illegitimate bastard child of EFI and Carb known as TBI.