boost valvesprings....
Thread Starter
Launching!
Joined: May 2005
Posts: 210
Likes: 0
boost valvesprings.... ok after my ling misfire ordeal, it isn't anything concerning fuel or ignition, i think i've got a weak spring or maybe 2. please post up your hydraulic roller valvespring specs! it's got patriot golds on it right now, they worked awesome for 5 months but it seems i've got one that's weak.
the car gets to 7psi almost regardless of RPM and starts pushing fresh air past the 02 sensor. it doesn't smoke, rattle, smell funny, leak, have coolant in the oil, gets 15mpg, and still has enough power on 7 cylinders to make serious tire smoke but WTF!
i'd ideally like to run 24psi max with my current setup.
just tell me what a guy has to do!
Gunnar from patriot has been taking awesome care of me so far, but before i go any further with the gold springs, i want to make sure there isn't something i SHOULD be running instead
the car gets to 7psi almost regardless of RPM and starts pushing fresh air past the 02 sensor. it doesn't smoke, rattle, smell funny, leak, have coolant in the oil, gets 15mpg, and still has enough power on 7 cylinders to make serious tire smoke but WTF!
i'd ideally like to run 24psi max with my current setup.
just tell me what a guy has to do!
Gunnar from patriot has been taking awesome care of me so far, but before i go any further with the gold springs, i want to make sure there isn't something i SHOULD be running instead
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FYI i run Patriot Golds also........ 174 closed.....
Pulled them off when we went thru the whole to much back pressure ordeal with the GT42... ordered a set of Comp 921's....... Compared by to different shops not told the brands the Patriots had better closed and open seat pressure.
Pulled them off when we went thru the whole to much back pressure ordeal with the GT42... ordered a set of Comp 921's....... Compared by to different shops not told the brands the Patriots had better closed and open seat pressure.
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My 918's are working at 10psi on the stock gto cam up to at least 7krpm. I haven't run it over that, because hp peaks at 6400 anyway. I'm planning to go to a bigger cam, so I guess I will find out where they fail.
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
I always set them up equally. I suppose you could run less pressure on the intake as it's in a much better position closing as the compression cycle starts rather than the exhaust closing as the intake is opening, but the intake valve is also heavier.
FormerVendor
Joined: Dec 2001
Posts: 2,444
Likes: 2
From: WWW.SPEEDINC.COM
Well yes, I thought I touched on that in my previoius response. I guess I'm looking at it the opposite way, as why run less on the intake, especially when you have better spring stability when running within .060 or so of coil bind. (so what would be the purpose of removing intake shim to reduce pressure and increase coil bind clearance).