Subject	I wouldn't use 4032 in a boosted application
Posted by	Jehannum on January 05, 2010 at 3:24 PM
	This message has been viewed 201 times.
In Reply To	Thanks, thats one thing i didnt know. That they wore off posted by Nostype2 on January 05, 2010 at 05:58 AM
Message	But it's really your choice. My guess is that they'll last about the same amount of time, given the extra punishment that the 2618 is built for at moderate boost (since switching to forged pistons for stock boost levels would be foolish). The difference in expansion is 13%: 2618-T6: 22.3 microns/meter-°C 4032-T6: 19.4 microns/meter-°C Assuming 88mm pistons and (an extravagant) 800°C temperature delta, 2618 pistons will grow by 0.0156mm and 4032 pistons will grow by 0.0136mm. So, it's up to you whether 0.002mm difference makes you opt for the weaker alloy. I intend to run at least 8 more PSI of boost than stock (17PSI), so my choice was pretty clear cut. IMO, if you're that concerned with piston slap at startup, you're better off with the stock cast pistons. Otherwise, go 2618 and put a dry film lube on the skirts to help minimize the damage done. Your powers are useless! I'm wearing my tinfoil underwear!
Follow Ups	Question about 4340 & 2618 Pistons. I know that the - Nostype2 03:37:30 01/04/10 Street car or race car? This was discussed last week - JonnyZ(SoCal) 13:44:57 01/04/10 2618 are stronger - Jehannum 20:51:49 01/04/10 Thanks, thats one thing i didnt know. That they wore off - Nostype2 05:58:02 01/05/10 I wouldn't use 4032 in a boosted application - Jehannum 15:24:06 01/05/10 most off the shelf wisecos for the TT are 4032 - aliaZ 18:50:35 01/05/10 What about the Rings wearign out, because of the piston - Nostype2 05:15:10 01/06/10 Sitting there doing the math - Jehannum 07:29:11 01/06/10 4340 is a chromoly steel - canyoncarver 08:49:32 01/05/10
Post a Followup	You cannot reply to this message because you are not logged in.