03EBZ06

Has anyone used these? If so, results please. I hope so, as their part# 1000418 is going in my engine along with AT4075 rings.
http://www.racetecpistons.com/at_products/index.htm

See if you can guess what the piston/wall clearances were on this setup.
These were the old Diamond pistons. To give you a clue, the builder used a 0.004" clearance on the mains.
[IMG][/IMG]

matrixiskool

iTrader: (12)

I dont get what Im looking at do you have any other pictures?

03EBZ06

This is a scan of the side of my piston. The piston in the picture was one of the old pistons.

LS3RX7

iTrader: (9)

I use Autotec's quite a bit, very nice pieces for the money, looks like that piston had too much clearance, they only call for .003 clearance from Autotec.

03EBZ06

the picture above is what 0.010, NOT 0.001, but 10 k looks like. You can see where it slapped the metal out of the piston and if you look closely at the ring end gaps, you can see the xcessive wear as the gaps were facing down.
The pistons called for 0.0055, they were almost double that number.

LS3RX7

iTrader: (9)

Wow, most Autotec's (4032) call for .003, most Racetec's (2618) call for .004 Do you have the sheet that says it takes .0055, that is surprising.

03EBZ06

The piston in the picture above is a DIAMOND piston. Their 2618 stuff calls for 0.0055. The new (4032, #1000718s) did in fact indicate 0.003".

LS3RX7

iTrader: (9)

OK, that makes sense.

Oldass

Also looks like sharp edge's at the bottom of the cylinder. If so, might want to sand a little radius.

odarabla

iTrader: (1)

I have the autotech pistons in my motor. Top notch company. The guy that started this company started JE pistons..