I just purchased a '91 Camaro RS last week. I've owned several carbed Camaros and my last one was TPI. I'm not overly impressed by the power of the bone stock LO3. Is it worth my time and money to modify this engine or should I switch to TPI or carb? What is the most I can expect from this engine? I was very impressed by the power I was able to make with simple bolt ons on my '85 LB9.

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'68 Camaro - Vortec 350
'85 Camaro Z28 - 305 TPI - FOR SALE
'91 Camaro RS - 305 TBI

 

simple bolt ons can get the car into the 14's, a lot more is possible with a common stuff like intakes and heads.
check my sig.

lata
tim

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91 Camaro RS-LO3,Auto.
14.301 @ 94.39mph
The car is going street strip for next season. 13's here i come!!!!!
Edlebrock TES Headers, Cat Eliminator Pipe, Borla Adjustable Cat Back,Marche Pulleys, HyperTech Chip,Transgo Shift Kit,B&M Convertor(2000stall),Steve Spohn Rear Rig( all rod ends), Poly Front Bushings,Ported TB, 350 Injectors, Edlebrock Performer TBI Intake, Performer Heads, 1.6 Roller Tipped Rockers
http://www.mycar.net/mafb/registry/detail.cfm?id=299

 

I'm still leaning towards TPI. Does TBI have as much (more?) potential as TPI?

[This message has been edited by Z28Maniac (edited January 11, 2001).]

 

what do u think TPI is going to give u? When it came from the factory (in 85) that 305 got a different cam, heads and exahsust. so the change from TBI to TPI is really not worht the money. If u want to wake up ur car put a set of gears in it. I mean u only have a 2.73 rear end, imagine the pull with 3.73s inplace of them

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1989 pontiac firebird
bright red exterior(just repainted)
grey interior
5 spd
305 TBI (stock)
WS.6 formula wheels
3.73 posi rear end
http://members.aol.com/j007golden/Mikey89.html
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1985 trans am
factory bright yellow
4 wheel disks
16 inch wheels
305 TPI
power antenna and mirrors
t tops

 

I've got an '85 Z28 with a TPI 305, so I know what it can do. It does have 3.23s however, which makes for a better launch than 2.73s. Yeah, a posi rear with taller gears is in my RS's future.

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'68 Camaro - Vortec 350
'85 Camaro Z28 - 305 TPI - FOR SALE
'91 Camaro RS - 305 TBI

 

When does simple bolt ons get u into 14's? LO3's are very unpretictable engines. Some run 15.9-16.3 stock in the 1/4 mile and some run high 16's low 17's. Simple bolt ons aren't going to knock off a full second on the 1/4 mile or more. U will need more than that. I admit there are some fast stock LO3's, like urs used to be NJ, but urs is a rare case. Most of us start in the mid 16's with our cars.

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Eric Natzke
91 Firebird 305 TBI

ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-MSD Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone-Free TBI mods
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

 

i think i got the fastest stock l03. he, but ive never been to the track, ever. so i can think that as long as i want to. Cuz when i go to the track, its not gona be stock no more. tpi is expensive, and harder to tune, in my opinion. tbi is comparativly cheap, and easy to tune. it is a step up from carb. if tuned right. tpi i think might hold a better flatter curve, but all in all. whether carb,tbi, or tpi. you can make em all work great.

 

hay watsup. STICK WITH A TBI STYLE SETUP, YOURRIGHT THOUGH , ABOUT IT BEING SLOW FOR STOCK BUT A LITTLE WORK AND YOULL BE PLEASED
AND SAVE A WOLE LATTA MONEY GOOD LUCK FOM AVI

 

Z28Maniac are you sure you have 2.73's?

 

TPI or TBI, your limited by 2" butterflies. If you need more the 700 CFM then the EFI starts getting $, but so does a good 750 Carb, and the carb will be hard to get as well calibrated as EFI, and you just can't do as much with a none ecm controlled dist.