Opinions on cam specs

[01ws6er]

Almost ready to start my rebuild and I need some cam advice...I can't find anything I'm looking for in the search or other threads so here goes:

I'm going to be doing a cam only setup and the car is an stock cube M6, mostly driven on weekends and is mostly a street car. I am planning on doing a custom grind using XFI lobes with specs something like 230/230 duration and .612/.604 lift on a 110lsa (yea I know, but I want it real choppy). The only thing I'm wondering is would a tad more lift/duration on the exhaust side help me with power/torque down low on the stock heads? The specs on the exhaust lift are slightly lower than the intake lift at the same duration with the XFI lobes.

Or could I use an XER lobe on the intake side to give me more of a split to the exhaust side... Something like 236-XER/236-XFI duration and .602-XER/.607-XFI lift?

[mark21742]

Almost ready to start my rebuild and I need some cam advice...I can't find anything I'm looking for in the search or other threads so here goes:

I'm going to be doing a cam only setup and the car is an stock cube M6, mostly driven on weekends and is mostly a street car. I am planning on doing a custom grind using XFI lobes with specs something like 230/230 duration and .612/.604 lift on a 110lsa (yea I know, but I want it real choppy). The only thing I'm wondering is would a tad more lift/duration on the exhaust side help me with power/torque down low on the stock heads? The specs on the exhaust lift are slightly lower than the intake lift at the same duration with the XFI lobes.

Or could I use an XER lobe on the intake side to give me more of a split to the exhaust side... Something like 236-XER/236-XFI duration and .602-XER/.607-XFI lift?

I've been doing a lot of asking and reading looking for the exact cam for my car too. from what I've learned: the exhaust valve is smaller, so the lift can be lower on the exhaust side because once a valve is opened past half of its diameter it is nolonger a restriction to air airflow.....bigger valve (like the intake valve) needs a higher lift to get out of its owm way....smaller valve(like the exhaust valve) needs less lift to get out of its own way.
just a little info for you, hope it helps

[01ws6er]

I've been doing a lot of asking and reading looking for the exact cam for my car too. from what I've learned: the exhaust valve is smaller, so the lift can be lower on the exhaust side because once a valve is opened past half of its diameter it is nolonger a restriction to air airflow.....bigger valve (like the intake valve) needs a higher lift to get out of its owm way....smaller valve(like the exhaust valve) needs less lift to get out of its own way.
just a little info for you, hope it helps

I think I may borrow a grind from a guy on tech... 230/230 .613/.591 (lobes would be XFI/XER) on a 111lsa. Cam only setup and lots of weight reduction with a 4000 stall and it runs pretty impressive times. I could only hope for a full second slower haha.

[Ryans99LS1]

I think I may borrow a grind from a guy on tech... 230/230 .613/.591 (lobes would be XFI/XER) on a 111lsa. Cam only setup and lots of weight reduction with a 4000 stall and it runs pretty impressive times. I could only hope for a full second slower haha.

Go with it. Thats what i was going to suggest before i got to this post. Have you seen the dyno sheet for it?

[01ws6er]

Go with it. Thats what i was going to suggest before i got to this post. Have you seen the dyno sheet for it?

The guy put down 422hp and I think 394 tq with a cam only A4 with 4000 stall but I havent seen the sheet...

His vids I believe:
-idle-
-10.83 pass-

[Ryans99LS1]

Go halfway down the page, its an attachment. cam has an amazing curve.

http://www.ls1tech.com/forums/genera...0-111-2-a.html

[01ws6er]

Go halfway down the page, its an attachment. cam has an amazing curve.

http://www.ls1tech.com/forums/genera...0-111-2-a.html

damn that things sick! Cant wait haha.

[WS6ICK2K]

Agreed, I'm not sure if I would go any lower on the LSA. The 111 hits very mean.