I've just bought a 92 RS with 130K miles on it. 305 TBI, auto, interior perfect, white paint faded, from a lady I work with that bought it new. I'm going to drive it some before having the motor rebuilt because it still runs great and doesn't leak/use any oil. My question is when I do have it rebuilt what are some minor things I can do to help it a little. I'm not looking for monster performance just a little better than stock. (I've got a 98 STS for performance hehe.) I'm thinking a little more cam, roller rockers, exhaust, and maybe a Jacob's ignition. I know they are only like 190 HP from the factory so I'm only looking to push it to around 235-250 max. Let me here from you guys.

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Former F-Bod's:
96 Z28 A4, Airfoil, !TB, !MAF, K&N Filter
89 RS 305/auto
86 Z28 305/Auto
86 LT 305/Auto
86 Firebird 305/auto
81 Z28 350/auto

Currently F-Body-less
2000 S-10 '4 banger with a K&N filter'

 

Anyone got any ideas?????????

 

lt1 cam, world products sr torquer heads, headers, 3" catback exhaust, k/n open element air filter 14x3, edelbrock 3704 manifold, 1.6 roller rockers, msd stock replacement coil, and you'll be there.

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fl-thirdgen.org#0004
moderator @ www.fl-thirdgen.org '86 t/a, 3.27, auto, homemade CAI, hypertech AFPR, comp cams 1.52 roller tip rockers, holley prostrip annililator ignition system, shift kit,
OEM corvette 2100 rpm convertor, lakewood adjustable panhard rod and trailing arms, edelbrock 6872 headers, catco 6007 3" cat, flowmaster 17151 3" single outlet catback. 14.91 @ 90.57 177.7rwhp 356.4rwtq

[This message has been edited by mrr23 (edited July 07, 2002).]

 

LT1 cam, 1.5 roller rockers, a full exhaust(1 5/8 primary headers/3 inch collectors, 3inch cat, 3inch cat back), edelbrock performer tbi intake, ultimate tbi and diy afpr mods, and a custom prom will get everything you want and more.
you are gonna wanna look into a posi and soem 3.73 gears to take advantage of teh whole power band.

later
tim

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NJ SPEEDER
91 Camaro RS
305TBI/700R4
12's Coming Soon
2nd Annual East Coast F-Body Nationals
July 20,2002
www.geocities.com/njspeeder
My MAFB.ORG Home Page
http://www.mycar.net/mafb/registry/detail.cfm?id=299

 

Thanks for the 411 guys I'll let everyone know how it goes when complete.

 

Ditch the TBI. IM not sure how the aftermarket TBIs are but youll never make decent HP with the stock TBI system.

Get a TPI changeover kit. (includes ECM and fuel injectors) but can be expensive.

Or go carberated.....

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94 Red Z28 A4
Home-made Ram Air Scoop/Moroso CAI/JET Airfoil/1LE Elbow/TB bypass/Mac Headers, Gutted cat/B&B Tri-flo Catback/ March 2pc. Underdrive pullies/BMR STB/PST front end kit and oversized sway bar/ NGK-TR55 Plugs/ 17" X 9.5" Budnik Raptors / Nitto 555 Drags
2 / 600 / watt IMPP 304 12's /600 watt amp/Pioneer Big Face Head/3 stock Bose speakers 2 /Rockford fosgate 6 1/4 punches
Best run
13.631 @ 100mph 2.02 60ft with mods in sig
http://www.pla-net.net/~feerst/spankbestet.jpg

 

Contrary to the previous post, you'll have no problem making 230-250 horses with tbi if you go with some of the advice given in this thread.

 

Stock TBI chuck?
if so thats impressive. But ive seen a guy who totally built up his bottom end and heads and got 285 RWHP an then threw on a victor jr and king demon carb and got 400RWHP with the same setup.
If you plan to break ever 300hp, ditch the TBI.

 

He says he only wants 230-250 max. Well within the limits of the stock tbi setup. Plus if he lives in a climate that has dramatically different seasons, his tbi will much more driveable while making the most power without having to change jets. Stick with the tbi.

You will be waiting a while for that 305 to wear out. Mine had 174k miles on it when I pulled it and I would have bet money it would have lasted another 100k easily.



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Pix of my rides!
Finally have some pictures of Y2k Vette wheels, motor, etc.

*1991 Camaro RS !LO3
8.65@84.3mph NA
*1988 Mustang 5.0 7.92@87 NA- For Sale
*1988 Mustang GT 'vert
9.56@73-bone stock
*1986 Kawasaki Ninja 1000R 7.30@100mph
*1987 Honda CRX Si 16.5@85mph-stock

100% American!

 

LT1 cam, get a single plane carb intake and a TBIK adapter plate, do the ultimate TBI mods, VAFPR, headers and full exhaust. custom chip would help but it would run on the stock one with some tuning
--------------------------------------------
1992 Camaro RS LO3/700R4
Holley 600 Double Pumper, Weiand Stealth Intake Manifold, Accel Distributor and Coil, Hedman Headers and Modified Hedman Y-Pipe(Ported and 3" Pipe), Straight-Pipe Cat, Flowmaster 3" 2 Chamber Race Muffler, 160º thermostat, 3.73 Posi, Boxed LCAs, Kumho 255/50s, Polyurethane Transmission Mount, Stewart Stage 1 Water Pump, and B&M SuperCooler.
Proform Shift Light To Be Installed Friday Night!

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1992 Camaro RS LO3/700R4
For Sale: Brand New ZZ4 Roller Cam

 

Tim (NJ SPEEDER) went low 14s with stock tbi, stock lo3 cam, and stock chip. Suspension played a big part in it, but thats still at least 230 hp. I'll see first hand in about 3 weeks what the stock tbi is made of when my engine is done.

 

for all of those of you out there who can't see the performance potential of tbi i will make it all nice and simple for ya.
wet flow intake design and low distortion from vacuum signal means you can treat your cam and intake selections pretty much like a carb motor. the digital controls allow for exact tuning of both fuel adn timing.
there is a small aftermarket supplying quality tb's, injectors, and intakes that has everything you need to make as much power as you can afford.
the stock tb can perform up to the 300hp at teh crank level easily(an upgrade to 350injectors is needed) as long as a proper custom chip is done.
if you go to thirdgen.org and look at the diy prom and tbi pages you can see all the information on at least a dozen very solid combos that have been proven to work and you will see people planning at least that many more different combos.
the easiest way to state this is that any induction platform gm has ever used is capable of producing good hp. tbi will cost a bit more than a carb motor and a bit less than a tpi motor.

later
tim

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NJ SPEEDER
91 Camaro RS
305TBI/700R4
12's Coming Soon
2nd Annual East Coast F-Body Nationals
July 20,2002
www.geocities.com/njspeeder
My MAFB.ORG Home Page
http://www.mycar.net/mafb/registry/detail.cfm?id=299

 

I just want to thank all of you for the info. I live in Savannah, GA so the weather is not too bad. As far as waiting for the motor to wear out I know what you mean. This is my 7th camaro (5th 3rd gen) and my last 305TBI had 146K when I got rid of it and ran great. Here's the run down on the car and my plans (reads budget haha)
Car-$2200, 91/92 Z28 Blisters, spoiler, wheels and paint $1500, front end rebuild $300, Engine $1500, tranny just rebuilt. All in all I'm looking to have a 92 RS exactly the way I WANT IT for around $5500. I think that's a fair amount considering what I've seen some low mileage nice examples going for on EBAY. As far as the engine goes like I said I'm not looking for whiplash ***** to the walls performance, just a little more kick than stock. And for you guys who say you could have an older 4th gen Z28 for that I have to say.......I like the 3rd's better as I've had both. I'm 31 have a really good job and can finally afford to do the car I want the way I want. Yes I will not have the performance my 96 Z28 had but I'll have the car I want to keep forever and ever and ever well you get the point. Thanks again.

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Former F-Bod's:
96 Z28 A4, Airfoil, !TB, !MAF, K&N Filter
89 RS 305/auto
86 Z28 305/Auto
86 LT 305/Auto
86 Firebird 305/auto
81 Z28 350/auto

Currently F-Body-less
2000 S-10 '4 banger with a K&N filter'

 

Just thought I'd throw in my 2 cents worth. I would stay away from Jacobs Ignition Products.My friend and his dad both had a system for less than a year and they both took a puke on them.They did'nt have very many miles on them either.I would recommend a Crane HI-6 with a LX92 coil. They have an adjustible rev limiter with out the hassles of the chips or pills.They have alot of excellent other features also.If not a Crane I know alot of people who have had good luck with the MSD 6A and 6AL ignitions. It is up to you but I thought I would pass along the info.Good luck in your quest....
James

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91 Z-28 305 H.O. 210 RWHP
crane hi-6,holley reg,air foil,3:73 richmonds,Ed Wright stage 2 chip,msd wires,SLP headers,best e.t 14.4@99.02mph

95 S-10 Blazer 4.3l A4 W/230,000 original miles.Never been touched but getting tired.Still likes to do burnouts!!!!

 

have you thought about going 350TBI? you can spend alot of money on a 305 and not go very fast. IMO. The 350TBI swap isnt that tough. It mainly depends on how big of cam you are going to run(on the 305 also for that matter) TBI doesnt adjust to big cams very well, and you have to do alot of prom burning to get things right. For the 350 swap, you have to swap out the Prom, injectors and knock sensor over, but everything else the same. the throttle bodies are the same just bigger injectors in the 350. You can go with the 454 throttle body which flows 600cfm, I think, then there is always aftermarket.
If you want to go with the 305, a small cam, clean your stock heads up, maybe put bigger valves in it, 1.94/1.50 is about all they can take because of the small bore size, anything bigger the vavles are badly shrouded and hurts performance. 1 5/8 headers, 3inch is good but you will loose some low end tourqe with the drop in back pressure, it will help if you run a high flo cat. Then there is always the intake swap, I dont know how much power you would pick up over stock. a gear change would probably help too, IMO 3.42's are the highest I would go, with 3.73's you are out of your power band to quick. again just my .02