Help with this cam

[TYTILIDIE]

I have a custom ground cam I just got for free from a guy that owed me a favor. But I called COMP to see what it was and it sounds like it may be a bit much for my build. Here are the specs:

Duration - 248int
242exh @50?

Lobe sep. - 112

Lift - 562int w/1.5 rocker
540exh

Is this a cam that would idle well and be ok for a daily driver? Or is it too big? What would I need to do to the heads to run if it is a good cam?

 

[Windedv6]

Re: Help with this cam

I have a custom ground cam I just got for free from a guy that owed me a favor. But I called COMP to see what it was and it sounds like it may be a bit much for my build. Here are the specs:

Duration - 248int
242exh @50?

Lobe sep. - 112

Lift - 562int w/1.5 rocker
540exh

Is this a cam that would idle well and be ok for a daily driver? Or is it too big? What would I need to do to the heads to run if it is a good cam?

What is your current head and turbo package?

John

 

[TYTILIDIE]

Re: Help with this cam

What is your current head and turbo package?

John

I have ported Vortec heads with 2.02/1.60 valves, 987-16 Comp springs, Crane gold 1.6 rollers, ARP head studs, SCE Titan head gaskets (if that matters).

Turbo is a PTE67GTQ journal bearing turbo.

 

[TYTILIDIE]

Re: Help with this cam

Would anyone use this cam with my set up? I am thinking change out valve springs and go to 1.5 rockers. But anyone know if it would idle ok? I don't really tihnk I want a real rough running truck or track only.

 

[Windedv6]

Re: Help with this cam

The springs you have will allow you to run a .600 max lift with .050 left before coil bind, provided you are at a 1.800 installed spring height (normal for Vortecs), with the comp 987 springs. I personally like to see .0700 left before coil bind which would put you in the .580 max lift range. If you run the 1.5 rockers you would be at .562 lift and no real noticable performance difference.

The duration and LS are the biggest performace factors for forced induction motors. The high durationof this cam is somewhat over kill for your setup and will be lazy at cruise and low boost. It would make a better strip cam than a street cam. It would help if had a 114 LS with the higher duration as it would bring the overlap down a little. I could see this cam in a bigger ci stroker motor with a 76mmm turbo.

Are you sure the cam is for hydraulic lifters? Is the front of the cam a late model or is a it a flat nose cam?

It is tough to beat a comp 422 cam for a vortec setup with a GTQ 67 through a GTQ 72. What cam is in the Ty currently?

John

 

[alwayscode390]

Re: Help with this cam

John is on it .... why risk ANYTHING at this point?

I had custom cam and ditched it for a 422 , just for this reason.

what are you looking for? ---

 

[TYTILIDIE]

Re: Help with this cam

This cam is definitely for hydraulic lifters and has the late model nose. My current cam is the Kenne Bell. With the 1.6 rockers I am at .470 gross lift, or at least that is what I have read. NOT a lot of info on that cam at all. I guess I am pretty happy with it for the most part. I got this custom grind shaft for pretty much nothing and thought it might make a good cam to put in to a spare motor but given the opinion of the characteristics I am likely to not run this cam, maybe I will sell it or just keep it around for if I ever change my mind.

Thanks you for your input John, you are a guy that definitely knows his stuff.

 

[Six-is-Enough]

Re: Help with this cam

If you have stock pistons or stock like (no valve reliefs) you will not have enough piston valve clearence with that much lift. It will bend valves or go kaboom.:tdown:


I am with John on this one. To much duration and not enough LSA. Plus the wholepiston to valve clearence thing.:2cents: