camaroandreas

Is there any valve spring kit with more seat load then the PRC kit?
Itīs not good enough for my 30 psi and 7500 rpm.

Thanks for help.

/Andreas

camarols1

iTrader: (17)

The Patriot "Extreme" duals have about the most pressure for a 1.300 diameter that I've seen.
You will likely have to machine the heads to accept larger OD springs which will open the door to many other spring options.

Beaflag VonRathburg

iTrader: (176)

Cutting the spring pockets for larger springs isn't expensive either. It should cost around $50-62.

camaroandreas

Isnīt the prc kit the same as patriot extreme?
If not, do you know the seat pressure prc kit have?

chriswtx

iTrader: (5)

patriot extreme's are 160lbs on the seat at of seat pressure at 1.8" installed hight. I have mine shimmed to 180lbs on the seat. I believe the PRC's are 140 or 145LBS of seat pressure at 1.8" installed hight.

camaroandreas

Thanks, i will get them and shim to 180 me to.

chriswtx

iTrader: (5)

seems most here are running 180-200lbs of seat pressure with big boost..It also depends on you cam lobe design and how large(heavy) your valves are as well..

Beaflag VonRathburg

iTrader: (176)

PRC and Patriot springs are the same thing. They are both made by the same company.

NA$TY-TA

iTrader: (21)

I can tell u the Patriot springs had a better seat and open preassure then the Comp 921's.... tested by two different shops who didnt even know the brands.

higher seat preassure and valve control is why most go solid roller and lighter valves....

camaroandreas

I use Manley race valves 2.05/1.6" and TSP Giant cam 248/254 .

NA$TY-TA

iTrader: (21)

Whats the lift and lobe sep on that cam...... ????

camaroandreas

0,613" and 115 lobe.

witry

iTrader: (8)

patriot by far in performance and price to