Better, not Bigger Article

Loved the piece but have misplaced.  My question is I have an 02 Z06 with a 427 LS2 coupled with LS7 heads.  The first dyno (with only 200 miles, 92 octane & 83 degrees temp) yielded 517 RWHP.  While I had hoped for more (goal is to exceed ZR1 BUT naturally aspirated!), I am wondering if I have the best cam for this configuration.  The specs are COMP LS1/Gen III Roller.  Lift: 608/622, Duration: 285/293 and LSR is 112.  Have 60 pound injectors.

After 2,000 miles still experience periodic surges and clearly it does not like under 2,000 rpms.  Have I met the criteria of your article?  My tuner says that with replacing my stock mufflers and testing with racing fuel on a 60 degree day could had a lot more power.  

A couple of questions for you to answer first please...  You mention that your car dies not like to idle under 2,000 RPM.  What exactly does it do below that number?  Does it just die or surge or what?  Also you mention when you are driving that you experience periodic surges.  At what RPM does this generally happen and what are you doing as far as driving?  Are you just crusing or what?

You obviously have a couple of problems you need to resolve before you start changing parts again to increase power and further complicate things.  By answering the questions above, you should be able to narrow down the issue(s).  It is not normal for your car to have to idle at such a high speed no matter what camshaft yo have installed.

Larry  

Thank you Larry for taking the time to respond.  Probably 25% of the time when decelerating, RPMs will drop very low and surge (surges only happen under 2,000) to above 1,000.  It will continue for several seconds and sometimes smooth out.  Other times it will die usually after a "hammering" on the freeway and at end of the off ramp.  My tuner installed a “catch can” and related plumbing so I assume it is just a matter of seat time that the computer will learn.  It has improved over the last 1,500 miles.

The biggest annoyance is the double disk clutch which makes you feel like a dirvers ed student.  Still worth the trouble when “under power”.

I would like to upload pictures, how does a rookie accomplish?  Thanks!