Pontiac GTA Enhancement information and discussions with Technical DIY and performance tuning information for the hardcore Pontiac GTA Owners and Enthusiasts.
Forum | Register Now | Members | Search | How Do I... | Calendar

Go Back   The GTA Source Page Message Forums > GTA SPECIFIC > GTA TECH

GTA TECH Want to discuss technical topics about your GTA.... engine tuning, mechanical upgrades, problem areas, etc.? Then post it HERE!

Reply
 
Thread Tools Display Modes
Old 08-27-2018   #1
Darthscooby1001
Darthscooby1001
 
Darthscooby1001's Avatar
 
Join Date: Feb 2013
Location: Germany
Posts: 19



GTA Year: 1989
GTA Engine: 350 TPI Automatic
Corvette Heads swap

Hi guys,

I have the chance to pick up a set of Ali heads from a 90 C4 Vette. My car is an 89 GTA 350 and both motors are L98. I have tried to do a little research first but getting confused, I would just like to know if they will fit, i.e. bolt straight on or if it is a waste of time. I am going to pull my engine over the winter anyway to clean it up so this would be a convenient time to change them. Your help and advice appreciated.

Thanks.
Darthscooby1001 is offline   Reply With Quote
Old 08-28-2018   #2
86TA355SR
Registered User
 
Join Date: Oct 2012
Location: IN
Posts: 555


Re: Corvette Heads swap

Years ago I had these. They bolt right up. I can't remember if I had problems with the angle plugs though. When I bought my AFRs, I went with the straight plugs but I can't recall why...

They're an OK head. Just don't pay to much for them. Hopefully you're getting a great deal or I'd save and buy an aftermarket set.
__________________
1991 GTA, SLP Perfomance Package
1989 GTA, 26K Original Miles
1988 GTA, Stock
86TA355SR is offline   Reply With Quote
Old 08-30-2018   #3
DynoDave
Registered User
 
DynoDave's Avatar
 
Join Date: Mar 2015
Posts: 262


Re: Corvette Heads swap

Don't forget the EGR difference.

Read this.

https://www.thirdgen.org/forums/exha...ml#post6247580
__________________
DynoDave
1988 Pontiac Trans Am
POCI #72200
DynoDave is offline   Reply With Quote
Old 09-06-2018   #4
JonBlake
Hopefully soon to be restored Third Gen owner.
 
Join Date: Apr 2016
Location: Pacifica, CA
Posts: 255


Re: Corvette Heads swap

Quote:
Originally Posted by DynoDave View Post
Don't forget the EGR difference.

Read this.

https://www.thirdgen.org/forums/exha...ml#post6247580
Interesting setup on that Vette. But looking at the pix in that link, it doesn't appear that this suspect EGR tube connects directly into the head. If that's the case, the Vette heads probably would just bolt directly to the block on your Pontiac. Would valve size matter between applications, from a Vette to a Pontiac, in the event that the valves are of a different size between the two? I got another question, would the Vette heads require a specific size of piston in order to provide it's full performance potential compared to the pistons that come in the Pontiac? I got a feeling that if the heads are changed to increase the engine's overall performance, the pistons would also need to be changed out as well. Could be other things within the valvetrain.

Last edited by JonBlake; 09-06-2018 at 01:01 PM.
JonBlake is offline   Reply With Quote
Old 09-30-2018   #5
Darthscooby1001
Darthscooby1001
 
Darthscooby1001's Avatar
 
Join Date: Feb 2013
Location: Germany
Posts: 19



GTA Year: 1989
GTA Engine: 350 TPI Automatic
Re: Corvette Heads swap

Thanks guys
Darthscooby1001 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heads 87GTACKO GTA TECH 22 03-14-2012 09:56 AM
113 corvette almunium or 906 vor tec soarestransam19 GTA TECH 4 03-09-2012 08:40 AM
Trick Flow Heads or Edelbrock or...?? WickdEye GTA TECH 3 02-29-2012 12:59 PM
stock heads junk wildbird GTA TECH 22 05-26-2008 10:29 PM
Corvette L98 Alum heads 88BlackGTA GTA TECH 9 04-04-2002 03:10 AM


All times are GMT -5. The time now is 11:22 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.