Quote Originally Posted by BillBoost37 View Post
That XP vid says 600 RPM, a stock cam could sound lopey at 600rpm idle. A lot has to do with the rpm. If you bring it up 100rpm, things smooth out.

I use 1/4" NPT brass plugs with recessed heads with a little pipe sealant on them. Same goop as you should use for LIM bolts.

If you want to go further you open up the end cap on the LIM that is under the TB and realize why we have poor flow from rear head to front. Then you open that up a bit. By doing this additional step, I kept #4 from running hotter than the other cylinders. Typically the middles run hotter and #4 being in the back, runs the hottest of all.
hmm very interesting, thanks for that info..I'm guessing I can get those brass plugs at home depot?..and I know the rpm plays a big roll, he has a 900 rpm idle vid to with the xp.

900 rpm xp

YouTube - GTP, XP cam idle vid, 900RPM.

Still think the s1x sounds better and has more lope?

Here is the ultimate question I'd like to get some feed back on...which cam should I buy over the other and why?.. id like to be in the 12s and have good topend with out having to rev past 6400 and use the same valvetrain components listed previously..