Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > TBI
Register Forgot Password?

TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 12-06-2004, 01:18 AM   #1
Member
 
Join Date: Mar 2004
Location: Joliet, IL
Posts: 178
Car: 1991 Pontiac Firebird
Engine: 305 TBI
Transmission: 700-R4
Axle/Gears: 2.73?

Classifieds Rating: (0)
Send a message via AIM to My Black 1991
305 to 350 TBI

ok so I know this could be a waste of money and time but what if I swapped in a 350 for my 305 TBI and left the stock TBI system? I know I would need more fuel to compensate for more air being added. So I was wondering if I can keep the 305 TBI set up and get more fuel to the mixture by adding either a regulator or higher flowing pump. The only reason I would do this is so I don't have to buy the 350 computer and emissions stuff. And if I added TPI heads, being that they are not the swirl port, would I need 2 cats if I keep TBI? If all else fails I would just try TPI intake and such. Thanks
__________________
1991 Firebird 305 TBI/ 700R4. Cars & Concepts t-tops, Original Window Sticker, Carsound Hi-flo cat, Taylor 8mm wires



3rd Gen Fest 2004
My Black 1991 is offline vBGarage Page   Reply With Quote
Old 12-06-2004, 02:37 AM   #2
Senior Member
 
Join Date: Jul 2001
Location: San Jose, CA
Posts: 1,828
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23

Classifieds Rating: (1)

Send a message via AIM to vjo90RS8
The 305 and 350 TBI setups use the same intake manifold, tbi, and computer. The only difference is that the 350 uses a different chip, bigger injectors, and youll have to get a knock sensor ESC Module for a 350 engine. You can use TPI heads with no problem but you might have to do some EPROM tuning to get it to run right.
vjo90RS8 is offline vBGarage Page   Reply With Quote
Old 12-06-2004, 06:36 PM   #3
Supporter/Moderator
 
ShiftyCapone's Avatar
 
Join Date: Feb 2001
Location: Cincinnati, OH
Posts: 11,239
Car: '90 RS
Engine: LO3
Transmission: T5

Classifieds Rating: (4)

Send a message via AIM to ShiftyCapone
Quote:
Originally posted by vjo90RS8
The 305 and 350 TBI setups use the same intake manifold, tbi, and computer. The only difference is that the 350 uses a different chip, bigger injectors, and youll have to get a knock sensor ESC Module for a 350 engine. You can use TPI heads with no problem but you might have to do some EPROM tuning to get it to run right.
Agreed. The chip and injectors are the big things. They will make or brake your potential power and drivabilty. It is not uncommon for 350 TBI swaps to be slower than the 305 when the stock chip is used. This is covered an awful lot so a few searches should give you more details.
ShiftyCapone is offline vBGarage Page   Reply With Quote
Old 12-07-2004, 11:27 PM   #4
Senior Member
 
SchwarzCamaroRS's Avatar
 
Join Date: Sep 2003
Location: Temecula, CA
Posts: 1,281
Car: 1991 RS Vert / 2006 Cobalt SS
Engine: LO5 / 2.0 Ecotec Supercharged
Transmission: TH700R4 / 5-speed
Axle/Gears: LS1 10 Bolt w/ Disc/3.73 - 4.05 LSD

Classifieds Rating: (0)
Send a message via AIM to SchwarzCamaroRS Send a message via Yahoo to SchwarzCamaroRS
you can PM me for details i did that, and i dont have a tuned chip, and a 305TBI can beat me... im in the process of fixing it. I wish i woulda listened to them when they told me the same thing... if you have patience, you might as well wait and build a better motor... you notice a big difference in the bottom end torque, but thats just about it... and, the open element sounds different.
SchwarzCamaroRS is offline vBGarage Page   Reply With Quote
Old 12-07-2004, 11:27 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > TBI

Tags
1991, 305, 350, difference, eprom, firebird, give, heads, intake, intakes, pontiac, power, same, set, swap, tbi
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 05:13 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details