Aftermarket Mod Cams

[SD Wheeler]

First.......the Crower cams are $250 EACH. Yup........$500 for a set of regrinds.

Second.....the SHM cams are pretty wimpy. The Stage 1 cams are nothing more than stock PI cams. The Stage 2 cams are essentially blower cams. Here is an example for comparison:

Stock PI cams: .510"/201 duration-Intake
.530"/210 duration-Exhaust
113.5 lobe centers

SHM Stage 2 cams: .495"/230
114 lobe centers

Single pattern with low lift and high duration numbers. This will lead to difficult tuning, oddball idle problems, stalling and surging. You will get a big time lope and high rpm power but that's about it. Not a good tradeoff in my book.

The other aftermarket camshaft regrinds feature more lift than the stock cams and improved duration numbers with more narrow lobe center angles. I have two different N/A regrind cams that I normally suggest for most of my customers. They have a nice lope at idle (but not earth shaking); build considerable low and mid-range power; have no tuning or idle issues. Once you figure out camshaft dynamics and how they affect the operation of the engine and it's powerband you will see clearly that single pattern, high duration cams just aren't the answer for 99% of the cars out there.