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Old 09-18-2007, 04:13 PM   #1
NOTORIOUS VR
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Anyone know where I can get 6 M42 318is pistons?

as the thread title says... lookin' for 6 pistons from a E30 318is (M42 engine code).

I know they're probably not the easiest things to locate, so if anyone could help that'd be great.

thanks
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Old 09-18-2007, 07:10 PM   #2
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just wondering - why 6? the m42 is a 4banger - are you trying to fit them in a m20 block?
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Old 09-18-2007, 08:23 PM   #3
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Quote:
Originally Posted by FuryriderX View Post
just wondering - why 6? the m42 is a 4banger - are you trying to fit them in a m20 block?
correct
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Old 09-18-2007, 10:11 PM   #4
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I will take a look for you tomorrow around the shop after I get back from class.
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Old 09-18-2007, 10:57 PM   #5
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Shit, I just scrapped a M42 block with three good pistons in it
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Old 09-19-2007, 03:26 PM   #6
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Thanks guys.... any help would be great... trying to build up a crazy boosted E30 out of OE parts.

cheers!
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Old 09-19-2007, 11:25 PM   #7
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Sorry man, took a look... Theres only 5. 3 are from Beach Auto, in rough, rough shape. And the 2 others are from a blown engine, with bits of rings and crap stuck in the top of the piston.
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Old 09-21-2007, 01:22 PM   #8
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that's alright man.. thanks for lookin' anyways... seems like I need to do a little more research about using the M42 pistons anyways, as the CR drop's pretty low with the stock M20 crank. I think going with an M50 crank and/or rods will help that. But I'm still looking into it.

For now a turbo 2.7L it is.... watch for a 400+WHP E30 coming to a road near you lol...
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Old 09-24-2007, 01:29 PM   #9
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Old 09-24-2007, 02:32 PM   #10
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Stock 2.7 bottom end + i head will take you to 7.8 CR (IIRC). That's a bit low, but it's all bolt together, and can withstand 400-500 WHP with proper tuning, a stock HD, and metric blue head bolts. That's what I'd be doing instead of trying to source 6 pistons out of two engines. Also, if you do rebuild/build it up, then put good quality rod bolts, as those are the weakest link in the bottom end from what I've read around on E30Tech. Also, a bone stock M20B25 makes awesome power if done right (stock internally except for HG and HB).
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Old 09-24-2007, 09:28 PM   #11
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i got em, pm me your number
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Old 09-25-2007, 12:03 AM   #12
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^^^^^^^^lol holy shit dude where have you been hiding? hows the vert coming along?
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Old 09-25-2007, 01:00 PM   #13
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i'm gonna be selling it soon with or without paint job and touchups $$$
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Old 09-26-2007, 08:13 PM   #14
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hello? echo
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Old 10-02-2007, 12:36 PM   #15
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Quote:
Originally Posted by Axxe View Post
Stock 2.7 bottom end + i head will take you to 7.8 CR (IIRC). That's a bit low, but it's all bolt together, and can withstand 400-500 WHP with proper tuning, a stock HD, and metric blue head bolts. That's what I'd be doing instead of trying to source 6 pistons out of two engines. Also, if you do rebuild/build it up, then put good quality rod bolts, as those are the weakest link in the bottom end from what I've read around on E30Tech. Also, a bone stock M20B25 makes awesome power if done right (stock internally except for HG and HB).

It's a little low, but that's ok... going with M42 pistons & stock crank goes to about 7:1... so I'm looking into what crank to use as well. Anyone know if an M50 crank will fit w/o modifications?

400WHP shouldn't be much of a problem I think... the car will be running VEMS so tuning isn't an issue.

Gonna go with new stock HB's as I'm not a fan of MB's with a MLS gasket... and there's a few people that agree with me on that on various E30 sites. If anything a set of ARP studs will go in eventually.
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