This summer i bought a 91 rs. I was wondering how to make it faster w/out a huge cost. It tents to run hot, i put in a lower thermostat as a result. The car allready has a flowmaster kit, but the cats i believe are still tehre due to exhaust regulations. I want it street legal , but fast, preferrably w/out NOS. I want to be able to smoke all those damn rice rockets w/out a thought, not lookin to upgrade to the point of racin vets..just most stangs and camaros, and of course all jap cars. Lemme know what suggestions ya'll have

 

the good rice use N2o, so why shouldn't you?
There is a guy on here that was running low 13's with a 125hp shot! It's the cheapest way to go really fast.

 

I feel u Cobain. I'm in the same situation. I just got a 91 Rs and have the exact same passions. I heard of a 334cid stroker kit that suppossed to boost hp up to 115 thoroughbreds. Its priced at 600 bills, which
I think is affordable for that kind of hp boost.

 

...yeah, but you left out all the milling and clearencing of the block that is involved. I too have considered this, but I have been told that the 334 kit adds ALOT of torque, but not too much hp. Don't know how you can have one without the other, but that is what they are saying. - Randy

 

There are always ways to make it a little faster, Open it up with the air filter go Open Air, Get an exhaust put on do the Ultimate TBI mods, Chip, 180 degree thermo. The most expensive one out of this list was the Exhaust for me $300 from Jegs, $200 For some one to put in on then 2 days to figure out why my car sucked Hope this helps ya out.

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1989 RS Camaro
305ci TBI
Mods:
Hedman Header
Highflow Cat
3inch catback pipe
FlowMaster 80 Series Muffler
14x3 Open Air Element
8.5 HighTemp Spark Plug Wires
4.7 Ohm Reistor
Torque Converter Lock Up switch
www.rit.edu/~cjp8408
AIM: PopaPork

 

Simple. Just do heads/cam/intake/headers, along with a custom chip and higher flowing fuel injectors, you should be able to make over 300hp easy on that 305.

For heads, I'd recommend Vortecs, AFRs, WP SR Torquer 305s or L98s. Your best bet for performance would be the AFRs (~$1100), then the Vortecs (~$450), then the L98s (~$800) then the WP SR Torquer 305s (~$750). The prices are for a pair of assembled heads. Your compression will drop from 9.3:1 to about 8.7:1 with the AFRs or WP SR Torquer 305s, but you can have those milled or change pistons to help that. The WP SR Torquer 305s and the L98s will leave the 9.3:1 compression ratio.

For intakes, you'll need the GMPP Vortec TBI Intake (~$320) for the Vortec heads or the Edelbrock TBI intake (~$200) or a similar Holley model for the AFRs or WP SR Torquers. Just make sure the Holley supports EGR, I know the Edelbrock and Vortec TBI intakes do.

As far as cams go, expect to spend about $260 on it. Roller lifters can be reused.

I've got the Edelbrock headers and they're great. Noticeable difference upon installation. You can also choose SLPs (expensive, but considered some of the best) or some other brands.

To make all this work, you'll need a custom chip with higher flowing injectors. If you don't want to program your own chip, expect to pay about $300 for a custom chip.

A few other notes. The Vortec stock valve springs suck. For almost any cam you pick you'll need to upgrade them since they are only good to 0.450" lift. The L98 springs are good to 0.500" lift and I think the WP SR Torquer 305s are good even past that. I'm sure the AFRs are up there to, but you'll have to check.

To make the EGR work with the Vortec setup, I think you'll need headers and about another $100 in parts to connect the EGR correctly.

That's about all I can think to type now, any questions just ask,

Jason

 

Hey jason, when i bought the car it allready had a flowmaster system, would it still be beneficial to change the headers?

 

It takes some cash, but you can make a RS fly. I'm actually selling mine now...time for a LT1 Trans Am, baby! =D

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1992 Camaro RS (Auto) 5.0L TBI
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Performance mods
NOS (125 HP shot), Dynomax cat-back exhaust, Hedman headers, no cat, custom high beam delete ram air w/ K&N, MSD 6A ignition, MSD 8.5mm plug wires, LT1 camshaft
Soon to be installed:
Edelbrock Perfomer TBI intake, B & M 2200 RPM stall torque converter, Trans Go shift kit, World Products Torquer heads, Ed Wright Fast Chip

Audio
Sony Xplod CDX-M610 head unit, Pioneer 2-way 4x6 front speakers, Pioneer 3-way 6x9 rear speakers, 12 inch Pioneer VCCS PRO subwoofer, QLogic sealed box, Kicker ZR360 amplifier, Lightning Audio 1 farad capacitor

Other
Macewen White Faced Gauges/Shift overlay, A-pillar gauges (Phantom oil pressure, Air/Fuel), 180* thermostat, Window Tint, chrome valve covers, xenon headlights

 

It's funny but as much as I don't encourage a 305 to be built for racing....the more I like it.
Hands down off the shelf the Lt1 is faster. One thing I don't like about them is the price tag, looks, and cost of mods. If you could take that money and invest it into a thirdgen RS 305 you could have a very fast car. Some would say yeah....you have an RS that runs with Lt1's, maybe even Ls1's but you still have an RS 305! I guess it can go many different tangents. My friends always get that kind of a reply with their ford SHOs. Everybody says it's still a Taurus yadda yadda but it isn't in most respects.
If anything I would scrap the 305 and get a 4" bore block for so many reasons. Chevy = bang for buck = 350 small block hands down. That is my strong belief and why I went with the 350 myself. I did keep TBI because Chevy still = bang for buck and hands down TBI is the cheapest bang and still EFI. Everybody has a 350 and a carb, being different can be in many ways, 350 with TBI, 283 carb in a 2800 race ready thirdgen, you name it, it's all good when not a lot of people have done it.
305 just has the small bores and that hurts. There is a saying that GM should have increased the bore size instead of stroking the 327 to a 350 (going to a 3.48" stroke). I believe in this and the rule applies to the 305 as well. Many believe the 350 has too long of a stroke, what do you think they say about the 305 with the same stroke and even smaller bore!
Remember, there are reasons why experts say the 305 is just an economy v8....but you gotta see the face of that rustang when you've told them that you just owned em with a 305 TBI!

 

Definitely. I'm guessing you still have the factory exhaust manifolds on there, so it would be a good idea to put on headers. When you're talking about the flowmaster kit, you're probably talking about the cat-back, which replaces the pipe from the catalytic converter to the muffler, the tailpipes coming out of the muffler, and the muffler itself. Now you can open up the front of the exhaust system with headers and a high-flo y-pipe

The 305 TBIs were given 2.25" exhaust from the factory, which pretty much sucks. Ideally, if you had the money, you'd get headers for a 350 TPI. That'll give you a 3" y-pipe for highflow, then put on a 3" high flow cat in place of the stock 2.25" cat, and then a 3" cat-back from there. However if you already have the Flowmaster cat-back for the stock converter, I wouldn't worry about it too much. You can still make over 300hp with the stock 2.25" cat.

Jason