Pontiac Grand Prix Forums : Grandprix

The 11 second Gen3 XPZ setup is no more, and the heads and cam, and associated parts are up for grabs.

The cam has approximately 8,000 miles on it total. Ran perfectly when removed, and will come with the longer pushrods required for the intake side of the cam. The pushrods are Comp hi-tec pushrods. I ran stock pushrods on the exhaust side, which works fine.

I'd like to see 300+ shipping for the cam and pushrods

Pics:


XPZ markings


Cam


Comp 7.10 Pushrod


The head porting was done by myself and my machinist. I did all the runner work and bowl work, and he did all the valve seat work, valve job, and backcutting on the valves themselves.

The portwork was flowbenched to within +/- 5 CFM of Intense's Stage3 heads (they flowed just under the intense heads at low lift, and slightly outflowed them at peak lift). The heads have been disassembled and all components examined for wear/problems, as well as being cleaned up somewhat.

Heads include:

-5.3L intake valves, 1.89"
-LS1 Exhaust valves, 1.55"
-Viton valve seals
-Spring shims with LT4 spring centering shims to correct for valve length difference
-Comp 918 (130 lb seat pressure) springs, checked to verify seat pressure (any valvesprings could be used, but they come with 130s)
-Extensive intake and exhaust porting, d-shaped exhaust ports
-Custom rocker pedestal shims to correct for valve length difference
-Valvespring retainer clearance of 0.710" (springs will support .600 lift at rated coil bind)

These heads have approximately 6,000 miles on them since the portwork was done. The car ran like a champ despite having had a clogged #3 injector that was discovered during the demod. These heads powered the Gen3 powered regal to 11.9's at 115-118 mph.

I've got a good deal of time and effort into these heads, and would like to get 650+ shipping out of them. You're getting vendor caliber heads for less than half the price.

Pics:




Combustion chamber/bowls


Intake runner


Exhaust Port


Retainer/seal clearance


Valves


Spring shims/spring locators

Sorry for the poor photo quality, I'm working with a 3.2 Megapixel camera that is really old and crappy. I can snap some more head pics if necessary, but getting good pics of the ports is really difficult with this camera and no macro mode.

Also available is the LS1 throttle body kit, with GM 85mm MAF sensor. Throttle body is mildly ported as well, and comes with ZZP's "special edition" adapter/spacer which is made from a black Nylon/Poly material which also acts as an insulating throttle body spacer. I have over 400 in this setup.

Looking to get 250+ shipping for the kit.

If there are any questions, feel free to ask here.
Thanks for looking,

Mat

did youy have any other mods on the car with the head?

Please post your full location

Which one?

I'm currently splitting my time living in three different cities...

Champaign IL, Springfield IL, and Nashville, TN.

Hopefully that helps.

There are, but some things are already spoken for.

Is there anything in particular you're looking for?

I was sort of planning on creating another thread or adding stuff to this one once I got everything I was selling organized and such.

Bump for the weekend, get yourself ZZP/Intense S3 head equivalent for less than half the price

UPDATE:

Cam is sold, Heads are still available.

Also edited to add LS1 TB for sale

bump