rufretic

iTrader: (37)

Well I put some notches in my brand new pistons from ptv issues. How can I fix this problem? I've heard the marks I've made can cause hot spots/problems. Can I leave them? If not, can I just smooth out the marks or do I need to fly cut? The pistons came with valve reliefs but obviously not where I needed them. Heres the worst one:

Dracer173

just fly cut the pistons, sand the cut area after cutting to remove sharp edges. Isky cams sells the tools you won't have any hot spots.

Chevy406

iTrader: (12)

I just ordered my fly cutters from lindetools this morning. The advantage I see with the Linde cutters is that they will not damage the valve seat in your head. Whereas some of the other cutters require a junk head that has had the seats removed.

rufretic

iTrader: (37)

Where did you get them, website? I'm having a hard time finding them.
Thanks.

Turbo.TransAM

iTrader: (1)

x2 with the flycut


did you bend valves?

rufretic

iTrader: (37)

Not sure but I'm changing heads anyway.

JPH

iTrader: (2)

You did that, or was it machined like that already? If not, Yes you can flycut the pistons in the car and not upset the balance of anything. www.iskycams.com sells the tool to do it.

rufretic

iTrader: (37)

I did the little one in the center and on the right. The larger valve reliefs were machined like that from the factory. For some reason the reliefs were not where my valves made contact.

JPH

iTrader: (2)

What heads are on this motor, and what pistons are these? Wiesco maybe.

rufretic

iTrader: (37)

Stock 317s and Diamond -28cc boost pistons.

JPH

iTrader: (2)

Hmm... Ok. Well what was you PTV clearance when you assembled this engine to begin with?

ChiTownHustler

iTrader: (3)

Yeah and what kind of camshaft was used