i have 977 springs, but am going hydraulic roller, just wondering what exactly the differences of solid roller springs and hyd. roller springs are. as far as i can tell...in comparison to the 950's, i can only see the seat pressure being the significant differance at the open seat pressure #'s. can i run the 977's without issue, or should i go to a hydraulic spring?

 

The 977's will work on a hyd roller been there done that. I wouldn't downgrade the springs any less than that.

Bret

 

Agreed, I use the 977's fairly often.

 

Comp recommends the 987 springs for their more aggressive HR cams. I have found them to be less than adequate after a short period of time.

I like the 977 springs and recommend installing them slightly higher so to yield approximately 150 lb seat pressure.


www.geocities.com/dzperf

 

thanks guys, going to run this with some morel's and probably run some more lift aswell. just have to worry about piston/valve clearance now with .615 lift

 

The lift isin't the problem with P to V it's valve events that count.

I agree with HiTech... the 987's are far from enough valve spring to do the job.

Bret