Thread: L67 swap into a 99gt

http://www.grandprixforums.net/f17/t...lots-7763.html

Top swaps are ghey! Motor swap FTW haha.

Here's a writeup a friend Marc and I made on swapping the entire L67 motor into a L36 powered car. Dropping the cradle in my mind would make your job harder. Just pick up a hoist.. That being said, computer will require tuning, stock L36 fuel pump will be fine, and stock wiring is fine. Don't let anyone tell you otherwise. Anyhow, here's the link to the writeup
L67/L32 Motor Swap (W-body) - Complete Guide

Also, I should note that there will be an additional tree on a 97 M90 case that will need to be plugged using on a 98+

Top swaps FTW...I'd keep the stock bottom end and get a PCM that is already tuned. Again...like said there are some differences with the '97 vs. a '99...PM a little Nancy on here named 99prixgt...he top swapped his '99 and can point you in the right direction with stuff

I like reliability and most top swaps have a life expectancy of what, a year tops?

top swap FTW. Its reliable, no matter what anyone says. I constantly beat on my car. Im still on a stock pulley, and beat up 3.4 L67 setups

Originally Posted by bluegtp91

PM a little Nancy on here named 99prixgt...he top swapped his '99 and can point you in the right direction with stuff

yeah, im kind of a big deal

Originally Posted by ninnyGTP

I like reliability and most top swaps have a life expectancy of what, a year tops?

prove it.

Originally Posted by matt5112

How much timing are you running?

not sure, im using an intense pcm, when dave @ 3ep looked at it, he said the timing is really conservative. The car really needs a dyno tune. If you know what your doing and have all the supporting mods a m90'd L36/26 is just as reliable. To pop a piston or spin a bearing is from someone doing something wrong.

Im only on 5psi, 8 if its below 26*, i get very little knock even in 18* weather. Most i had so far was 1.6* of knock in the top of 2nd gear

Originally Posted by 99prixgt

top swap FTW. Its reliable, no matter what anyone says. I constantly beat on my car. Im still on a stock pulley, and beat up 3.4 L67 setups

Keyword being stock pulley

3.4 L67's are ghey.. Especially since 90% of them asre on a stock motor

Originally Posted by Bio248

prove it.

How would you like me to do that haha. I'm not knocking them, i'm just saying to me the better route is a full swap. If you want that extra power, buy a GenV

You'll make more power out a top swap too. High Compression Motor FTW!

Really just comes down to preference I suppose.

Originally Posted by ninnyGTP

Keyword being stock pulley

3.4 L67's are ghey.. Especially since 90% of them asre on a stock motor



How would you like me to do that haha. I'm not knocking them, i'm just saying to me the better route is a full swap. If you want that extra power, buy a GenV

g8 gt? from a stop i put a car on him till 75. From a 60-100 roll i had a half a car on him, all on stock pulley.

Or buy a genV and throw it on a L36

I'm not bashing your car or questioning what it's capable of. Just stating the obvious about 3.4 L67's haha


OOOOR, you can just buy the whole L32 more (check signature)

Bravo.........posting in a 4 year old thread.