People want to know and I don't have the answer. The only mods are K & N filters and dynomax exhaust.

91' Firebird

 

stock form 170hp
u might have now 175hp thats about it sorry man tbi isnt that powerful in stock form i got the same engine , but not for long

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91 RS' TBI 305
mods:
dynomax exhaust, lakewood control arms, gutted cat, pioneer deck, tbi spacer, jet stage 2 chip, K&N four inch element and open element, accel cap and rotor, moroso plug wires, msd blaster coil, bosche +4 spark plugs. Alot more mods to come!!
visit my page http://www.geocities.com/motorcity/pit/8410

 

To z28wiz:
How can you fit a 4" open air element under your stock hood? and with a tbi spacer???

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Mods:Hooker Aerochamber 3" exhaust, gutted kitty,
March 2 piece underdrive pullies, smog pump gone,;these two made a very noticable difference.
14x4 K&N open air element filter-the best mod so far
Eibach springs with KYB's all around.
Appearance: Harwood cowl hood, Z-28 wing, painted black(7/20/00)-original color was light blue
*All these mods were made this year
Stock Options:117,000 miles on motor, 5spd, TBI, 305, T-tops
Going to the track this summer, but i'm pretty sure i'm in the 15's now.

 

Some other easy stuff:

If the motor is in good condition, try Mobile 1 synthetic either 5w-30 or 10w-30.

Mobile 1 Tranny fluid. If the tranny in good condition.

Low temp thermostat say 160 degree or 180 degree. Get rid of the stock 195 degree one.

Give the car a tune up, if it hasn't had one in a while. The new coil and rotor really helped.

I've done all the above. My car has 203,xxx miles on it. The car has K&N and a dynomax like yours. I'd guessimate it's hp to be in the 180hp-185hp.

 

All 88-92 TBI engines were rated at 170 HP and 255 TQ.

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1991 Camaro Z28
5.7L 5-Speed
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
Webmaster: ICON Motorsports

 

Well thanks a lot for the info, but now I'm not so sure that's what I have. I bought the car less than a month ago and the person that owned it before me changed some stuff under the hood. Now I don't know what I have. It could be TBI or TPI. I just need to find out now.

 

TBI HP 2 LOW... i have many stories to prove this, but i wont ruin my evening talking about them, everyone here has heard me bit(h about that engine

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1991 Cavalier Sh*t *** Beater Car

(SOLD)
1988 Camaro SC w/Z28 Grille, 305 TBI
Mr. Gasket Non-Drop
Open Element Air Cleaner, IAT relocated, JVC CDPLAYER and REAR SPEAKERS - STOLEN FROM MOMS LUMINA
blue interior lights

"Yippy-kah-yaay motherf*cker"

 

If you've got a big round black thing under your hood, thats TBI. If you have an aluminum intake with 8 legs on it, thats TPI.

I dynoed my 92 RS with 195k on it, stock with a K&N filter, and got 150 HP and 200 TQ. Calculating 15% loss thru the T5, thats 175 HP and 235 TQ, so the torque was a little down, probably from high mileage.
Then I added a stock IROC cat-back, and got 158 HP and 220 TQ.

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1991 Camaro Z28
5.7L 5-Speed
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
Webmaster: ICON Motorsports