What's the most aggressive cam out there that won't make me have to replace my valve train every 12k miles. Is there anything more aggressive than the CC306?

 

Contact Combination Motor Sports. They will hook you up. Go bad as you want.

 

Can they do one that's easy on the valve train?

 

Yes, there are more aggressive "off the shelf" cams out there than the CC306. As long as you do your research and talk to a shop (Combination) that knows what they are doing, the valvetrain will not bea problem.

You really need to search the board and read up. Also think about what your goals are and what you plan to do with your heads. The idea with camshafts is to match the cam to the flow of the heads. This is how maximum power is obtained.

 

Yeah, I know you should have your heads matched to your cam. I was just wondering if anyone was running a really aggressive cam?

 

What ya wanting a circle track engine?

 

A circle track engine only has to last 500 miles. Like I said before, I want it to be easy on the valve train. Thanks for the helpful input.

 

Do you just want it to sound badass?

Why not just save up a little bit more and then contact Lloyd Eliot? You ae gonna need to freshen up the entire valvetrain anyway, you had might as well spend a few bucks more and end up with a good set of heads.

 

If I'm going to do it I'm going to do it right. Head work, 1.6, lifters, pushrods, ect. My only question is about the cam.

 

Lloyd sells cams matched to his heads now too.. I have both going in mid may..

 

If you want an agressive cam and longevity you are going to need premium valve train parts, especially springs. There aren't many street LT1's running anything bigger than the 306. To make use of such a cam you are going to need a low rear gear, loose converter (if an automatic) and good heads and exhaust as well as extenisve tuning. Vacuum for brakes is going to be marginal to just plain inadequate. Think about this carefully before buying. i'd suggest talking to Bret Bauer about a custom cam.

Rich Krause

 

I run a 233/239 on a 110lsa. It's an XER lobe grind, so it's probably a little more agressive than the CC306. Quite honestly, that stuff about losing vacuum and brakes just isn't the case. I took her out the day after everything was back together and the brakes were fine. If I had the bottom end and computer to handle it, I would slap a cam with another 10 degrees of duration in there without thinking twice about it. In terms of the stock shortblock and OEM computer, a CC306, GM847, or something in that size range is about the limit, though.

 

how does the camshaft affect the brakes?

 

Vacuum, and some big cams guys HAVE had problems in that area. Search around...

 

Last year I was running a 224/236 XE combo on a wide LSA. Vacuum was acceptable, but it required a 1,000rpm idle to get it high enough. At my previous 650rpm idle speed the vacuum was inadequate (~9" Hg) to operate the brakes consistently. At 1,000rpm I had 12".

Rich Krause