Generation IV Internal Engine - Help me pick a cam




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Pseudonym
06-11-2012, 06:12 PM
Im trying to decide between 2 cams right now

402 CI LS2
225cc Trickflow heads WITH 58cc combustion chamber
FAST 92
-10cc pistons so PTV shouldnt be an issue
current cam specs (240/242(.612/.612)112LSA)

Im looking at these 2 comp LSR cams
1. (251/259(.624/.624)115LSA)
2. (247/255(.624/.624)114LSA)

Which is a better fit for my engine? I would like something I could drive on the street, but it doesnt need to be easy to drive on the street. Is the first one too much for the engine? and of course, if you have used them, feel free to post your opinion.

Im also open to suggestions on other cams.


KILLERARMY
06-11-2012, 07:13 PM
I would contact Ron @ Vengeance Racing or Patrick G about a custom cam for your set up.Their is another guy on here by the name of Predator Z who also a cam guru on here.

Pseudonym
06-12-2012, 10:52 AM
The form on the website says send to Kevin@Vengeance. Should I email Ron instead?


Pumba
06-12-2012, 03:41 PM
Im trying to decide between 2 cams right now

402 CI LS2
225cc Trickflow heads WITH 58cc combustion chamber
FAST 92
-10cc pistons so PTV shouldnt be an issue
current cam specs (240/242(.612/.612)112LSA)

Im looking at these 2 comp LSR cams
1. (251/259(.624/.624)115LSA)
2. (247/255(.624/.624)114LSA)

Which is a better fit for my engine? I would like something I could drive on the street, but it doesnt need to be easy to drive on the street. Is the first one too much for the engine? and of course, if you have used them, feel free to post your opinion.

Im also open to suggestions on other cams.

The first thing I would suggest that you do is go to the following web site and fill in your data - http://www.wallaceracing.com/machcalc.php

Keep changing the valve lift until you achieve a Mach Index Number of .50. That will be the valve lift you should have your camshaft made to deliver.

If you want street manners, your LSA should be in the 116 to 118 range.

Good luck with your new cam.

-

Pseudonym
06-12-2012, 09:55 PM
Thanks Pumba. It says my current cam would have been good for the LS1 I orginally bought it for, but it is choking the 402.

I contacted PREDATOR-Z. It looks like he will make a suggestion.

Jrp1978
06-14-2012, 12:54 PM
Call Gab Ray over at comps ! His program and advice is free I like the # 2 you have there is what i run on a 112 !
That is a shit load of cam for a 402 but mine is in a g8 and it runs amazing outta the 7 cams i specd this one made best over all ! I only lost 7 hp in mid range but gained ave 37 from 4000 to 6500

Pseudonym
06-14-2012, 01:03 PM
How much did you make in the g8, and what size engine is in it? Could you pm me the phone number for Gab Ray, or just post it in here if you prefer?

A.R. Shale Targa
06-17-2012, 12:44 PM
I'd try one of these which is similar to your number 2
http://www.engpwrsys.com/index.php?act=viewProd&productId=14

highboost2000
06-18-2012, 01:46 PM
There is also a guy named Brian Tooley and he also sells spring kits that are incredibly reasonable. He is a great guy and will talk with you and absolutely tell you what cam you need and what lobe is best for your application. His number is 888-959-865 and his site is Brian Tooley Racing.
By the way he also has one of the quickest NA corvettes around. Super awesome guy. Literally spent an hour talking with me as I described everything that was on the engine and the weight of the car. Top Customer Service...
And awesome quick shipping...

Pseudonym
06-18-2012, 01:54 PM
I met Brian very briefly in Ohio last year when he was at TEA. I may buy a new set of valvesprings from him. Ron at Vengeance is specing the cam for me now. Thanks everyone.