Re: The Joy's of Boost now with polished Pistons
 

I did a new compression test to day


Cyl#1
Cold 170-psi
Hot 174-psi

Cyl#2
cold 170-psi
Hot 175-psi

Cyl#3
cold 170-psi
Hot 175-psi

Cyl#4
cold 170-psi
Hot 175-psi


SWEET

Re: The Joy's of Boost now with polished Pistons
 

where's the burnout vid?

Re: The Joy's of Boost now with polished Pistons
 

looks like cleaning the deck wouldent hurt either. IMO

Re: The Joy's of Boost now with polished Pistons
 

Sucks man - I don't polish them either in fact we shoot with aluminum oxide to rough them up just right (120 grit).

The valve reliefs I don't worry about on my forged pistons as even though the surface of a CNC piston is "mirror" like its actually the right texture its just that you're seeing the polish of cutting fluid and tool head. But definitely don't go and polish them.

Re: The Joy's of Boost now with polished Pistons
 

Re: The Joy's of Boost now with polished Pistons
 

not bad but i had better dirty seconds :). What r you on like 8psi?

Re: The Joy's of Boost now with polished Pistons
 

actually if you go to ur local machine chop(if thyre decent) u can have them media-blast them. u dont want them polished because it will slow atomization down.

Re: The Joy's of Boost now with polished Pistons
 

Ringlands are for the weak

Re: The Joy's of Boost now with polished Pistons
 

Not exactly...

Re: The Joy's of Boost now with polished Pistons
 

Do what all successful racers do - hit them quickly with some scotch-brite pads to debur them, and move to the next step in life. But then again, successful racers use FORGED slugs, so maybe you're preceding in your wrong way correctly (lol) by polishing cast pistons. I think that last ass-hattery comment makes sense.

BTW is that a B20A? That's a whole different sort of fail, for that matter. :4