High boost, LS7 lifters, what valve springs?
01-11-2014, 06:55 PM
#1
High boost, LS7 lifters, what valve springs? I got my turbo cam spec for my 408 and I need to run .666 lift on the intake. Currently I have Comp 26926 springs which are .675 lift springs with 129 lbs @ 1.135" seat pressure and 470 lbs @ 1.160" open pressure with a spring rate of 505 lb/in. I'm assuming you guys are running more pressures than that? What springs are you high boost guy running? I can run up to a 1.550 OD spring in my BMP heads. I was planning on running LS7 lifters and I do have Harland Sharp rockers also.
01-11-2014, 08:02 PM
#2
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I got my turbo cam spec for my 408 and I need to run .666 lift on the intake. Currently I have Comp 26926 springs which are .675 lift springs with 129 lbs @ 1.135" seat pressure and 470 lbs @ 1.160" open pressure with a spring rate of 505 lb/in. I'm assuming you guys are running more pressures than that? What springs are you high boost guy running? I can run up to a 1.550 OD spring in my BMP heads. I was planning on running LS7 lifters and I do have Harland Sharp rockers also.
