For those with a GT2 cam

[IDoVoodoo]

Just got my GT2 cam in the mail today. The cam is ground straight up. I was planning on installing at a 107 ICL. What are you guys installing your GT2 cams at?

[RadRacer]

Re: For those with a GT2 cam

.....I put mine in straight up I guess. I didn't really know you could change it around on our cars. I know I got the timing mess up by ~1/4" on the cam timing gear, and it resulted in my pistons being pummeled by the valves; a new motor then went in because of all the damage.

[IDoVoodoo]

Re: For those with a GT2 cam

would you happen to still have the spec card w/ the details of the grind?

[cam98aro]

Re: For those with a GT2 cam

.....I put mine in straight up I guess. I didn't really know you could change it around on our cars. I know I got the timing mess up by ~1/4" on the cam timing gear, and it resulted in my pistons being pummeled by the valves; a new motor then went in because of all the damage.

doesnt the cam gear and the gear on the crank have a little dot for you to line them up with?

they should all have something like this...

[IDoVoodoo]

Re: For those with a GT2 cam

yeah, they do. but the rollmaster timing set has multiple keyways to advance or retard the timing.

[RadRacer]

Re: For those with a GT2 cam

doesnt the cam gear and the gear on the crank have a little dot for you to line them up with?

they should all have something like this...

They do, however when I was putting it back together, I wanted to make sure I had the cam bolt on good and tight, so I threw the impact gun on it really quick; my timing gear jumped over the keyway about 1/4" and then tightened down! Note to self: don't use impact to put rotating parts back together :P

would you happen to still have the spec card w/ the details of the grind?

No I don't, I bought it used. ZZP has some specs listed online, and I'm sure you could e-mail them and get the specs you need.

yeah, they do. but the rollmaster timing set has multiple keyways to advance or retard the timing.

Really? I thought I had a rollmaster set, and it didn't have any other keyways. Maybe it wasn't a rollmaster after-all. I wonder how this cam would run if you changed it up any :)

[IDoVoodoo]

Re: For those with a GT2 cam

Really? I thought I had a rollmaster set, and it didn't have any other keyways. Maybe it wasn't a rollmaster after-all. I wonder how this cam would run if you changed it up any :)

The rollmaster crank sprocket should have had extra keyways.

That's what I'm wondering. My cam wasn't ground w/ any advance. Yet i've seen a spec card of a GT2 that showed it was ground with degrees advanced. Most n/a cams i've seen are also ground this way. ZZP said I should install my cam straight up.

Who else has a GT2 cam?

[lilchubby]

Re: For those with a GT2 cam

I have the gt2, and installed it straight up. I just got a new stock timing chain and dampener (with 105lb springs). I will get back with you in a bit about installing it either a diffrent way (i have a friend that should know if their are any gains to be made). Until then heres the specs on it

216°/216° at .050"
Intake Lift .317" (.507" lift at 1.6:1 rocker ratio)
Exhaust Lift .317" (.507" lift at 1.6:1 rocker ratio)
111 Lobe Separation

[IDoVoodoo]

Re: For those with a GT2 cam

yup, i actually have the cam on my lap right now.
Grind #
GM38 3303S/3303S HR111+?

I need to know what the ? is for your cam. Do you happen to still have the box or spec card. Is it +0 or +4?

Also, anybody with the GT1 (GM38 3324S/3324S HR113+?), what is your cam ground at, +0, +4?

Thank you.

[lilchubby]

Re: For those with a GT2 cam

hmm i dont think i have the card anymore, maybe someone else can chime in. if you can find caspernicus on here or that "other v6 site", he has a gt2 and can prolly help you out.

[IDoVoodoo]

Re: For those with a GT2 cam

yup, I pm'd him on the other site. He's gonna get back to me.

Aren't you guys degreeing your cams when you install them?

[lilchubby]

Re: For those with a GT2 cam

What im getting is that the cam comes with 4 degrees advance already ground into it. thus u just need to install it straight up to get the advantage of the 4 degrees.

[IDoVoodoo]

Re: For those with a GT2 cam

thanks for your help chubby.

[Den69RS96]

Re: For those with a GT2 cam

Even though you installed a cam with 4 degrees advance doesn't mean its 4 degrees advanced. Differences in the way the crank, timing chains, cam etc are machined can either reduce or increase the amount of advance. Only way to know is to degree you cam. For example you could have an after market crank say from eagle and install you cam straight up. When you degree the cam, you may find its only a few degrees advanced or even more then 4 degrees. Then you can either play around with the key way slots on the timing gear or by using advance bushings to farther increase/reduce your advance.

[IDoVoodoo]

Re: For those with a GT2 cam

agreed, when you install your cam you NEED to degree it. You can't just slap it in.