do u have to change the chip to change a 350 tpi to a 383 tpi?
Thread Starter
Junior Member
Joined: Mar 2002
Posts: 22
Likes: 0
Car: 91 z28 1le
Engine: 357
Transmission: 96 - 6 spd
do u have to change the chip to change a 350 tpi to a 383 tpi?
do u have to change to chip or anyhting like the for a 350 to 383 i know u have to change the crank but is the anything else with the tune port?
Senior Member
Joined: Jun 2001
Posts: 726
Likes: 3
From: Northern Kentucky
Car: 1991 Z28
Engine: L98
Transmission: 700R4
Yes, you will definitely have to change it to expect any significant gains......Youre gaining 33ci, and your ECM still thinks there is only 350ci. Post this message over on the DIY-PROM board.....they'll send you in the right direction.....good luck.
Joined: Nov 2002
Posts: 491
Likes: 1
From: Wichita, KS
Car: 88 Trans Am GTA
Engine: 5.1L Gen III
Transmission: T56
Axle/Gears: 3.70
will it help?
Yes
Is it neccassary?
No... you can raise the fuel pressue with an AFPR
and should be able to get near your potentionial
http://www.gmtips.com/3rd-degree/dox/tips/afpr/afpr.htm
BUT, tell us some more stuff, what year is your car, what heads, intake, etc. You may be beyond getting by without custom PROM tuning. No matter your setup with a 383 a custom chip will help.
Yes
Is it neccassary?
No... you can raise the fuel pressue with an AFPR
and should be able to get near your potentionialhttp://www.gmtips.com/3rd-degree/dox/tips/afpr/afpr.htm
BUT, tell us some more stuff, what year is your car, what heads, intake, etc. You may be beyond getting by without custom PROM tuning. No matter your setup with a 383 a custom chip will help.
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