Exhaust vs intake valve spring installed height
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Exhaust vs intake valve spring installed height
I returned heads home from machining today and
I have measured that all of my intake valves are approx. 1.900"
installed height and exhaust are all approx. 1.825".
With LPE cam I got specs that said that valve spring installed height
should be 1.900".
Do you think that I could have problems with this?
I have measured that all of my intake valves are approx. 1.900"
installed height and exhaust are all approx. 1.825".
With LPE cam I got specs that said that valve spring installed height
should be 1.900".
Do you think that I could have problems with this?
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Exhaust vs intake valve spring installed height (Sliding)
Since that cam has the same lobes (or nearly so) on int & exh I don't think you want different seat & over the top pressure between int & exh.
You should shim them all to the LPE spec and check both springs for coil bind and seal clearance. I suspect the lower install height would give such problems.
Are the springs from LPE? Are you using 1.6:1 RRs?
You should shim them all to the LPE spec and check both springs for coil bind and seal clearance. I suspect the lower install height would give such problems.
Are the springs from LPE? Are you using 1.6:1 RRs?
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Re: Exhaust vs intake valve spring installed height (65Z01)
Yes, the springs are from LPE. I think they are CompCams but
I ordered them from LPE together with cam.
Springs are 1.437" OD.
What exactly is coil bind?
Is it when spring is pressed all the way down so that binds touches between?
Yes, I will use 1.6 Pro Magnum RR's.
The problem is that I can't shim because exhausts are allready too much
pressed and in machining shop they told me that it's impossible
to machine heads with valve guides inside, and if they take them out,
I'll need new ones. They can't make new valve guides because everyone
in Croatia use only metric tools and all parts on vette are in imperial units.
Seal clearance won't be a problem because I have lowered guides.
[Modified by Sliding, 9:42 PM 4/13/2004]
I ordered them from LPE together with cam.
Springs are 1.437" OD.
What exactly is coil bind?
Is it when spring is pressed all the way down so that binds touches between?
Yes, I will use 1.6 Pro Magnum RR's.
The problem is that I can't shim because exhausts are allready too much
pressed and in machining shop they told me that it's impossible
to machine heads with valve guides inside, and if they take them out,
I'll need new ones. They can't make new valve guides because everyone
in Croatia use only metric tools and all parts on vette are in imperial units.
Seal clearance won't be a problem because I have lowered guides.
[Modified by Sliding, 9:42 PM 4/13/2004]
Le Mans Master
Joined: Jun 2002
Posts: 6,097
Likes: 0
From: High Plains Drifter Fayetteville, AR
Re: Exhaust vs intake valve spring installed height (Sliding)
machining shop they told me that it's impossible
to machine heads with valve guides inside,
to machine heads with valve guides inside,
