13 second 305 TBI combo
Thread Starter
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
13 second 305 TBI combo
A guy on the thirdgen email list posted this combo and his ET from his L03 305 TBI engine in his 1992 Camaro RS. I'm sharing to give you guys ideas and something to shoot for.
That's easily mid 13's with a better launch. Of course, now he's converted it to TPI and couldnt be happier. 
No dyno results or ET's since, though.
L03 short block
LT1 cam
World SR Torquer 305 heads
Edelbrock Performer intake w/ Holley TBI adaper
Stock throttle body and injectors
Custom ECM tune
Hooker shorty headers
3" cat-back
3.42 gears
T5 trans
It dynoed 225 whp / 255 wtq.
The 60 ft sucked because it wood ether bog or spin the tires on launch.
The car is setup for autocross, not drag.
2.6 60' time, 14.2 @ 97 MPH
LT1 cam
World SR Torquer 305 heads
Edelbrock Performer intake w/ Holley TBI adaper
Stock throttle body and injectors
Custom ECM tune
Hooker shorty headers
3" cat-back
3.42 gears
T5 trans
It dynoed 225 whp / 255 wtq.
The 60 ft sucked because it wood ether bog or spin the tires on launch.
The car is setup for autocross, not drag.
2.6 60' time, 14.2 @ 97 MPH
No dyno results or ET's since, though. 
Joined: Sep 2006
Posts: 952
Likes: 2
From: Austria
Car: 84 TA / 89 Formula
Engine: LS1 / L03
Transmission: T56 / 700R4
Axle/Gears: 3.73 / 3.27
are there any dyno results concering the rpm ranges of this engine setup?
thanks for sharing btw!
thanks for sharing btw!
Supreme Member
Joined: Mar 2001
Posts: 6,577
Likes: 0
From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
That sounds about right, pretty close to my combo. It could probably be done for less money. I used stock heads, and ported them in my garage.
Joined: Jan 2005
Posts: 10,407
Likes: 492
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
A guy on the thirdgen email list posted this combo and his ET from his L03 305 TBI engine in his 1992 Camaro RS. I'm sharing to give you guys ideas and something to shoot for.
That's easily mid 13's with a better launch. Of course, now he's converted it to TPI and couldnt be happier. No dyno results or ET's since, though.
That's easily mid 13's with a better launch. Of course, now he's converted it to TPI and couldnt be happier.
No dyno results or ET's since, though.I wonder if it was ever tuned with a wide band or even DIY.
Custom Tune can mean TBICHIPS.com, lol.
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iTrader: (1)
Joined: Mar 2006
Posts: 359
Likes: 1
From: Findlay, OH USA
Car: 1987 Monte Carlo SS
Engine: 400 SBC
Transmission: 200-4R
Axle/Gears: 4.10
I was thinking the same thing, seems a little light on torque. Decent results never the less. I'll hopefully have something similar by the end of the year in my bird. But I'll be using 416 heads and a ZZ4 cam though.
Joined: Jan 2005
Posts: 10,407
Likes: 492
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
You will like that combination. I have Ported 081s (basically 416s) with the ZZ4 cam on my 350 TBI. It will flat get up and go
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