JAX04

iTrader: (17)

Just wanted to confirm that most would agree to stay away from mahle pistons for FI??

i couldve sworn that i read many horror stories about them.

as im on my quest for a set of 4.030 forged pistons i dont wanna buy some pieces of crap

1evilss

iTrader: (8)

I just bought a set of them...and yes I read the same thing but I'm still gonna run them...from what I read they dont do so well under extreme boost (20+psi)

pdasterly

iTrader: (4)

i have some, so im crossing my fingers also. lingenfelter uses them
btw im at 12.5 psi with no issues

396375

iTrader: (10)

It's hard to generalize as they have different alloy pistons.You may be hearing stories about the softer aluminum pistons which were not made for FI.The stronger material holds up a lot better to boost.

TurboAv

iTrader: (6)

I'm using Probe in my build. When in doubt, call the manufacturer and ask them.

Blown06

iTrader: (32)

My 346 has mahle pistons in it. 3 years with 15 psi boost and over the last 8 months I have about 15 passes and a little dyno time on 23 psi (race fuel). No problems yet. About 4000 street miles as well, it gets beat on.

yelo04goat

iTrader: (11)

guy local to me had a set in his stock cube ls1 and one said NO MORE after 4000 miles but we think it had something to do with a bad hone job...

i hear stay away...

just bought wiseco lil pricy but dam they are sexy!

Inspector12

iTrader: (29)

Mahle pistons are some of the best. There power packs are not 2618 and are not designed for FI and yeah don't buy them for that Job etc... But if you have some made for your application they are Very good they have the newest machines in the country. But with that said Weisco can build pistons that noone else can and do it cheaper and stronger for the same or better products usually. GL!

JAX04

iTrader: (17)

thanks for the replies guys, seems the general thought is, powerpak = no,

if they are 2618 its ok. But i could assume the same for all (most) pistons though couldnt i

only reason i ask is simple. Ive been trolling the for sale section waiting for the diamond in the rough, lol. I dont wanna miss a good opportunity, aside from not sure which size motor im building, i guess i will let my budget dictate that.

EDIT:

anyone ever heard much about DSS pistons, i know this is going to turn into a a "just buy some weisco or diamonds" thread, but hey, im just curious.

Bob@BruteSpeed

iTrader: (16)

We have had very good results with Diamond pistons in many of our builds at the old shop, you should look into Diamond too. Bob

yelo04goat

iTrader: (11)

oh and the guy that used then used the power pack pistson on an N/A motor no boost no spray... like i said we think it was a crap hone job the cyl walls were all wavy

pdasterly

iTrader: (4)

how can I tell which mahle pistons I have. I think I have these
LS1314005I20 4.005 3.622 6.125 0.927 1.314 -20cc 427 9.1

stock48

iTrader: (17)

I'm running Mahle pistons in my truck, and can't find too much wrong with them. They started off as flat tops, and I machined a 12cc .050' dish in them(which made them really thin). Thousands of daily driven street miles, below zero start ups, towing trailers cross country, along with severe detonation while racing (due to a faulty MAP sensor)...

pdasterly

iTrader: (4)

call my engine builder to get exact model, then gave mahle a call today.
I have part number ls1314005120
2618 alloy
20psi max