engine swaping - Team Camaro Tech
Tech 2000 Our previous General Forum
Replies ONLY - no new topics.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Mar 20th, 00, 07:32 AM Thread Starter
Join Date: Mar 2000
Location: new york
Posts: 1

I have a 1989 iroc 5.0 tpi and want to switch the engine for a 400 bored .040 over with high performance pistons, aside from the heads which must be changed, what cam is recommended? Do you think this change is worth the effort?
scoheny is offline  
Sponsored Links
post #2 of 4 (permalink) Old Mar 20th, 00, 09:57 AM
Senior Tech
Join Date: Dec 1999
Location: Hayward,Ca,USA
Posts: 287

I don't think the TPI from a 305 is capable of flowing air enough for a 400. From what I have read is that the 350 TPI units are larger, not sure. But it is worth checking into before making a swap.

Steve R.
Steve R is offline  
post #3 of 4 (permalink) Old Mar 21st, 00, 01:12 PM
Tech Team
Join Date: Jan 2000
Location: Martinsburg WV, 25401
Posts: 34

You probably don't want the 400. They have a tendancy to run hot in between the cylinder bores. a 383 is probably your best bet. For your intake, you can get better runners, throttle body and injectors. Also, you can get a programmable ECM that you can access and tune with a laptop. A buddy of mine has gone through all of this with a 88 GTA. There is another regular on this board who has a shop in Waldorf Md. and he probably the one to really listen too. Good luck and I hope this helps somewhat-Dan in WV
68rally is offline  
post #4 of 4 (permalink) Old Mar 23rd, 00, 08:28 PM
Join Date: Mar 2000
Location: Bluefield WV
Posts: 13

I have a 1989 IROC as well,with a 383 in my basement, still needing a few parts! But one thing is the intake pattern changed in 1987 the two center are at 72 deg. This can be fixed by drilling I thought it would look strange so I got the heads. Have the base extrude honed, and buy a good set of runners. The upper plenum can be ported right beind the throttle body. If you look you will notice two 1/4 inch castings on the opening that can be removed. You can also free up air by removing the screens in the MAF, and removing the baffles from the bottom of the airbox. Holley makes an in tank fuel pump for the TPI cars that would work well. Check out www.thirdgen.org for a complete list of mods !!
Kwaherei is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome