[tom s]

Cliff,we set them a loose 6 cold.Comp sent me 200 on the seat springs when we first did it.We now use 180.Tom

[firechicken]

Originally Posted by Cliff R

We have 148lbs seat pressure, and 348lbs over the nose, should be enough for what we are trying to do?.........Cliff

Could you post your spring specs, installed height etc. I'm looking to set up my hydraulic roller with similar pressures.

[Cliff R]

You'd have to contact Dave at SD Performance, he set up the heads, I just double checked the work and measured the spring height/pressure(s), etc......Cliff

[J Druin]

Cliff, I know your right next door to KRE. Why did you go with heads from SD? Does Dave have a better CNC program for the heads than KRE?

[BruceWilkie]

I dont know what KRE has for CNC but SD has a 5 axis cutter and dave cleans up the CNC'ing by hand. Also understand SD's flow bench is more consistant.

[Steve C.]

And great reports of good customer service at SD Performance.

[stickboy]

Why solids on a hyd roller lobe? Other than easy switch from hyd to solid, weight.....why not just a solid roller lobe profile to begin with? Is there some advantage to using the hyd/solid setup?

[tom s]

they are less radical for a street engine in duration at 200 but still avail with high lift.For a strictly race car you would want the solid roller profile.JMO,Tom

[Larry Navarro]

Originally Posted by Steve C.

And great reports of good customer service at SD Performance.

Yes, Dave and Marcel are great to deal with!