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

TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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
Old 09-03-2009, 12:30 PM   #1
Junior Member
 
Join Date: Sep 2009
Posts: 3

Classifieds Rating: (0)
What's the difference between 305 n 350 TPI?

I don't know much at all so I'm asking for you're help.....I've always heard more fuel + more air = more power. With that said, I wonder what's the difference between the 305 TPI and the 350 TPI. I'm wondering if I can put a 350 TPI in place of my 305 TPI? If so, what am I going to run into, what would I need to buy?? I think I'm good with replacing what I can for more air as far as a bigger throttle body, k+n air filters, hooker headers with 3in collectors, 3in cat back with 3in duals in the back.....I do plan on doing the vortec L31 heads if that helps. Thanks. By the way, it's the 1986 305 TPI Iroc. Just to note incase someone brings it up, I am keeping the 305. I plan on being dynamite in a small package. Once again, thanks!!
This ad is not displayed to registered members.
Register your free account today and become a member on ThirdGen!
lameusername is offline vBGarage Page   Reply With Quote
Sponsored Links
Registered users do not see this ad.
Click here to register for free!
Old 09-03-2009, 12:34 PM   #2
Senior Member
 
Join Date: Jul 2000
Location: Somewhere lost in the Sunshine state
Posts: 4,764
Car: 92 Vert
Engine: 383 LT1 w/ Novi 2000 SC
Transmission: 700r4
Axle/Gears: 3.45 9bolt

Classifieds Rating: (27)
Re: What's the difference between 305 n 350 TPI?

You will want bigger injectors.
and a different chip for the 350.
__________________
92 Vert | 383 LT1 , Ported heads | Callies crank & rods | JE Pistons | Novi 2000 supercharger | 125 Shot Nitrous | SLP Headers | Alloy Engineering Strut Mounts | spohon adj. trq arm & T56 cross member | 9bolt with 3.45's
TPl383 is offline vBGarage Page   Reply With Quote
Old 09-03-2009, 02:26 PM   #3
Moderator
 
okfoz's Avatar
 
Join Date: Mar 2001
Location: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Posts: 9,238
Car: (2) 1987 T-top Formulas
Engine: 312 LB9, 305 LB9
Transmission: 700R4, B&W M5
Axle/Gears: Sag 3.73, B&W 3.45

Classifieds Rating: (0)
Send a message via Yahoo to okfoz
Re: What's the difference between 305 n 350 TPI?

Pretty much they are the same, the difference is obviously the combustion chamber size, the 350 has a slightly larger diameter for the extra 45ci. Some of the notable differences is they used a different knock sensor, and believe it or not depending on year they actually used a different positive battery cable, I think the LB9 & L98 used the same cable from 1987-1990 (year for year), but in 1991 & 1992 they actually used different part numbers for the cables. The other obvious change has been mentioned that the injectors are different for the 305 & 350. Many people have done the swap...

Your chip would probably work for now, but to get the full potential you would probably want to either A) program one yourself, or B) have one made.

John
__________________
87 FORMULA - 5.1 LB9/A4 T-tops 3.73 Modified (Yellow/Black)
87 FORMULA - 5.0 LB9/M5 T-tops 3.45 (Yellow/Gray)
89 FORMULA 350 - CONVERTIBLE 3.27 All original (Red/Gray)
www.3rdgenformula.com

Last edited by okfoz; 09-07-2009 at 09:47 PM. Reason: clarified something
okfoz is offline vBGarage Page   Reply With Quote
Old 09-04-2009, 10:23 PM   #4
Junior Member
 
Join Date: Sep 2009
Posts: 3

Classifieds Rating: (0)
Re: What's the difference between 305 n 350 TPI?

Thanks for the info guys now I think I have enough to go on for now.
lameusername is offline vBGarage Page   Reply With Quote


Reply

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

Tags
1987, 1989, 305, 350, battery, cable, camaro, chamer, combustion, difference, formula, gen, nos, size, tpi
Thread Tools

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 02:00 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0
All content copyright © 1997 - 2009 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.