i know that but what size, i see you had the tap in them so im assuming they are bigger than stock sized.

 

Ohhh.........., that is actually a thread chaser for the stock threads.

 

so they are still stock sized? they look bigger for some reason. thanks for the quick replies.

 

The hole the chaser is in looks larger because it has a recess that holds a metal ring, which in turn holds the gaskets on while you install the heads.

 

i saw that earlier, i just want to know what size the threads are so i can buy one myself

is there a p/n for it?

thanks again and i must say good writeup thus far!!!

 

ARP part#

912-0011
Clean Out Tap
M11x2.0-LS1

 

While things have slowed down for me on the install front (due to work) I thought this might be something interesting to look at. This is the output the Dynosim software has my engine producing at 12 lbs of boost. All specs entered are actual. Don't forget to subtract a % for drivetrain losses and 5% for program variances:

 

Now we're talkin.

 

Looks like you should be solidly in the 600/600 range.

 

with that big of a cam how did the tq peak so low at 2500rpm? Regardless, that's awesome!