Thanks to everyone who has helped make the twin decision, helped with the install and for getting the last thread closed by the boss!!

Way to go ABDTR!!!!!

 

Hard, not really. Worst part is changing the tappets. CR will be harder to do as they don't have the tappet cover, but Rob has some dandy tools for swapping those now.

That fitting you listed in the other thread is what you're after.

My friend Gord put new CR tappets in his engine when he rebuilt it with a stage 3 colt cam. They were less than $10/tappet. Geoff charged me $$5 or 6 a tappet for resurfacing. So it really doesn't add much cost, when you look at the prices we pay for other items on our trucks.

I'd say talk to Zach about cam selection. Last I heard, he still recommends the 181/210 for daily drivers and trucks under 4k rpm. The 188/220 spools chargers much easier, but at the price of some efficiency. Thats more geared for a mid 4k top end, which CR's are hard pressed to reach. 181/210 is a drop in cam, but it definitely does not hurt to degree it in.

 

I wouldn't run the stage 2 cam, without checking valve clearance. Heard a few had valve to piston conflicts.

Jamie, just throwing this out. I have a brand new 2007 CR head, that has orings installed in it. Orings done by passager and I have a colt stage 3 and hamilton 188/220 cam/springs, if you in a hurry. If it was me, I would remove the intake plenum. Dave/Farrell has seen big flow improvements by doing so. Brett will have to chime in, but we are getting the old 12V castings very near flow numbers of a stock 12V hamilton head, with better flow characters than hamiltons under 0.500 lift.

This week we have two twin builds on the go. Let the welding begin.

 

24v castings, not 12v that we are seeing some good numbers out of.