If you did have "valve float", it would be at higher rpm and it sounds like
your issue is through the rpm range.
Stock springs have about 90 lbs of pressure in the valve closed position.
This should be sufficient for even a higher lift cam or high ratio
rockers...I don't think it would be the springs unless they have
significantly less force than this.
I use 95lb springs with a 1.6 ratio rocker and high lift cam and don't have
any issues...even at 6000 rpm.
I still think that you should do a leak down test......this will tell you if
the valves are the cause and, if so, if it is exhaust or intake....it will
give you some direction to look.
-----Original Message-----
From: healeys-bounces+britishcars=shaw.ca@autox.team.net
[mailto:healeys-bounces+britishcars=shaw.ca@autox.team.net] On Behalf Of
James Shope
Sent: Saturday, September 29, 2007 7:25 PM
To: healeys
Subject: [Healeys] playing detective
with all the responses suspecting the valve train, i have began to wonder.
with nothing obvious could it be possible that with new valves and guides,
the
valve is hanging up and not closing fast enough. the valve came out easily
and moved easily in the guide when we took the springs off, but is it
possible
for it to return too slowly and allow compression to escape. i know that it
was moving up and down but had no idea of how quickly it returned to full
close. could this be possible or do the springs have too much tension for
this to happen. healeymanjim
_______________________________________________
britishcars@shaw.ca
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
_______________________________________________
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
|