Topic: delete

[KrautKoffin]

[lucky]

Oversize valves?
Intake and exhaust?

You would have to modify the cylinder head and have new valve seats installed.
It may not be possible or even worth while.
Interference of the valves with each other during overlap has to be checked.
The piston clearance with the valves must be compatible.

But the cylinder head would have to accommodate the larger valves.
You must always check the valve to valve guide fit on any engine that is taken apart for rebuilding.
The max allowable wobble of the valve in the guide must be checked.

I cannot imagine Cycle -X selling you oversize valves with out asking any questions.

[KrautKoffin]

Oversize valves?
Intake and exhaust?

You would have to modify the cylinder head and have new valve seats installed.
It may not be possible or even worth while.
Interference of the valves with each other during overlap has to be checked.
The piston clearance with the valves must be compatible.

But the cylinder head would have to accommodate the larger valves.
You must always check the valve to valve guide fit on any engine that is taken apart for rebuilding.
The max allowable wobble of the valve in the guide must be checked.

I cannot imagine Cycle -X selling you oversize valves with out asking any questions.

Well Lucky, they just did. I ordered the kibble white +1mm intake and exhaust valves for the 550 platform. My machinist hasn't done a 550 head in years but thinks the guides will be fine. Everything will be checked, I was just hoping for someone to have some feedback about them

[K_Kalynuik]

 Dynoman Sells the same valves. Kibblewhite Stock size or O.S. by 1mm. I went with stock but a good machinest should be able to help you out with the oversize valves. Im sure they would not sell something that cannot be used. Im sure its a lot of work to use them but Maybe there would be more feedback/knowledge about using them in the racing section since not many street builds get the oversize valves.

[Lostboy Steve]

What exactly will +1mm valves do for you? I doubt a noticeable difference will be had. A good porting and stock valves probably flow just about the same. I'd like to see the difference on a flow bench though..

[KrautKoffin]

What exactly will +1mm valves do for you? I doubt a noticeable difference will be had. A good porting and stock valves probably flow just about the same. I'd like to see the difference on a flow bench though..

http://forums.sohc4.net/index.php?topic=132539.0
I didn't want to cross post so please ask away in there.