ls2 bait

iTrader: (11)

the heads im going to be using have 13.5 degree valve angles as oppsoed to the factory 15. if i use a stock head to cut will that create an issues? im not looking to pull apart a new set of tfs heads just to flycut and i cant get a straight answer on any of my clearance questions so im looking into just cutting the pistons in case.

aNuBiS

iTrader: (25)

Very good question. I would assume that would bring up an issue, and I am going to be in the same boat shortly, so bump for you. lol

NoMoreFWD

iTrader: (1)

You need to use the same angle head for the fly cut. If you use a 15* to fly cut there will be no relief at the first point where the 13.5* would hit.

aNuBiS

iTrader: (25)

Which makes sense. Not to hijack, but can you use your good set of heads to flycut the pistons with, if you happen to have them disassembled

LS1rulz

iTrader: (1)

Call TFS or TEA. They should have the tool available to rent. You'll likely jack up your new heads. Either the valve seats, or the chambers.

GuitsBoy

iTrader: (4)

You need to have the valve seats removed. Which means youd need to have new seats installed and have a new valve job done. Plus you run the risk of wearing the guides out faster. I would certainly not use a set of good heads.