Possible Valve Clearance Issue?

[ShiftTheDrift]

Do you guys think I'll have valve clearance issues with an E303 cam and 1.7 rockers? I'm thinking that would put me right at .540 lift?

I really don't want to retard the cam if I can get away with it. Thanks!

 

[95CobraMike]

have your heads ever been milled down?
actually what heads are you running??that should be the first question

 

[ShiftTheDrift]

Trick Flow's Twisted Wedge (non o-ringed) as they come from the factory.

 

[ShiftTheDrift]

Correction, it's actually lower than .540. Check it out:

.498 (e303 advertised lift) / 1.6 (old rockers) = .31125 * 1.7 (new rockers) = .529 lift

Look right?

 

[ShiftTheDrift]

This is taken verbatim from Trick Flow's web site..

"Maximum cam specifications with factory flat top pistons: 224° duration at .050" lift, 112° lobe separation with .540" lift"

FMS E-303 Camshaft Specs
---------------------------------------------------------
Advertised duration: 282 intake/282 exhaust
Duration at .050 in. cam lift: 220 intake/220 exhaust
Gross valve lift: .498 in. intake/.498 exhaust
Lobe separation: 110 degrees
---------------------------------------------------------

My calculated max lift is .529 with 1.7 rockers. (see above) Please correct me if I'm wrong. Thanks!

 

[ShiftTheDrift]

I've got to start work on this tomorrow. Does anybody have an idea?