zz4 swap
Thread Starter
4th Gear
Joined: Feb 2007
Posts: 4
Likes: 0
zz4 swap
next month me and my father are swapping a zz4 into his 86 auto. o know i need to swap the water pump, dist, and intake. anything else we will need to swap from the old block? will we need to run a custom chip or 160 t-stat? and i would like to replace the vacum lines at the same time. anybody know where i can buy them? i work at a gm dealership and they are discontinued. anything else we should be aware of?
thanks for the help
thanks for the help
Melting Slicks
Joined: Oct 2006
Posts: 2,238
Likes: 10
From: College Station TX
next month me and my father are swapping a zz4 into his 86 auto. o know i need to swap the water pump, dist, and intake. anything else we will need to swap from the old block? will we need to run a custom chip or 160 t-stat? and i would like to replace the vacum lines at the same time. anybody know where i can buy them? i work at a gm dealership and they are discontinued. anything else we should be aware of?
thanks for the help
thanks for the help
Drifting
Joined: Sep 2004
Posts: 1,638
Likes: 3
sooner or later you may want to look at going with a manifold upgrade - and a programable chip - but for now:
swap it in
plug it in
- get in -
and punch it!
Carl Johansson
Race Director
Joined: Feb 2004
Posts: 12,517
Likes: 19
If memory serves, the balancer on the zz4 is a neutral 8 inch. If so, swap your existing 6 3/4 balancer on it.
I ran a zz3 motor from 1992-1996 with stock programing and no issues. After 70k, I pulled it to build a 383 stroker. Running stock programming on it as well.
I ran a zz3 motor from 1992-1996 with stock programing and no issues. After 70k, I pulled it to build a 383 stroker. Running stock programming on it as well.
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Michael S. Palmer
Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
I put a ZZ4 in my '91 Z28 with an L98. It ran perfect with a basic (not customer) hypertech chip and 160 thermostat. Got in the low 13s with it like that and it weighed just at 3800 lbs. Obviously a custom chip would be ideal.
You will need to use the stock items that you have listed.
I ran the ZZ4 balancer with mine, but that was in an F-body. I don't know if you will have room in a Y-body.
You will need to use the stock items that you have listed.
I ran the ZZ4 balancer with mine, but that was in an F-body. I don't know if you will have room in a Y-body.
