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02-26-2009, 08:58 PM | #1 |
Scooby Newbie
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Mahle Stroker Piston?
Has anyone used the Mahle stroker pistons in an EJ205 with the STi crank? I was going to to go this route and see if anyone had any opinions or experience with these. The only hesitation I had was that these were 4032 alloy. At my powere levels probably not a big deal, just wanted a little safety margin for any unexpected detonation.
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02-27-2009, 06:19 AM | #2 |
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I'm also about to head down this path with 2.0l closed deck block and 2.5 sti crank and I'm interested in any reports on the Mahle's as well.
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02-27-2009, 07:34 AM | #3 |
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they make that piston in both alloys, i have talked to them. the actually gave me both part numbers just dont know where it is
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02-28-2009, 12:40 AM | #4 |
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02-28-2009, 12:47 AM | #5 |
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I built a stroked speC ej20 with these pistons. I never heard back from the buyer, so all I know is that it must have worked. Everything went together as it should have. I took the pistons and block to my mahine shop and had the block bored to fit the pistons.
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02-28-2009, 12:50 AM | #6 |
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The EASIEST way to tell if you have the correct pistons is to get a used STI 2.5 piston. Then lay the STI piston on its face and lay the stroker piston on its face next to the STI piston. Simply visually compare the pistons. The wrist pin locations should be spot on comparable. Unless you have serious vision problems you will be able to detect the 2mm difference between wrist pin location (stock 75mm pistons are 2mm higher than 79mm pistons).
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02-28-2009, 01:18 AM | #7 | |
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Quote:
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03-26-2009, 10:43 AM | #8 |
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I've got the motor reddevil is built with the mahles and they seem to be working really well. A little bit of noise and smoke at startup in real cold weather but other than that very quiet for a forged piston. Motor is running good and soon to be tuned.
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03-26-2009, 11:43 AM | #9 |
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Great to hear that!
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03-27-2009, 03:44 AM | #10 |
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I am also thinking of going this route. I am interested to get details from any users of this combo.
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03-27-2009, 03:48 AM | #11 |
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Assembly wise, its as easy as pie.
Take block and pistons to machine shop. Have block bored to fit pistons. Assemble. Drive. Really that simple. You are just swapping the crank and rods, the machine shop does teh "hard part" of boring. Make sure the bearings are good to go, and thats it. |
03-27-2009, 01:00 PM | #12 |
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09-14-2009, 06:15 PM | #13 |
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Im using these pistons in my build as well...
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01-27-2010, 06:38 PM | #14 |
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Where is a good place to get the mahle ots pistons and how much are you guys spending. Also do they come with the rings/pins/clips and so on?
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01-27-2010, 07:28 PM | #15 |
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We can do Mahle ots pistons for $555 shipped.
Give me a call and let me know. www.RealStreetPerformance.com 407-695-0699 |
01-28-2010, 07:54 AM | #16 |
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You can also use the stock pistons and really thick (2mm) head gaskets, FYI.
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01-28-2010, 10:43 AM | #17 |
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01-28-2010, 11:46 AM | #18 |
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No, the stroke goes IN 2mm, and OUT 2mm, adding to 4mm overall.
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01-28-2010, 12:06 PM | #19 |
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01-05-2011, 05:25 PM | #20 |
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What kind of clearance are people running with these? I was recommended .0025-.0033 but that is a little too much for me. These are the 4032 alloy and this is going to be 300-350hp maximum.
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01-05-2011, 08:45 PM | #21 |
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mine are at .0024; quiet on start up and oil consumption is about a cup every 2k with Syntec 30wt/40wt blend and hard driving. Cars at ~300WHP now plan is 350-400WHP...
Mahle now makes these in a Power Pak Plus out of 2618 alloy (P/N SUB193642P16). Price is $506.42 shipped from autopartsdealer.com. That's an amazingfreakin price! |
01-05-2011, 08:47 PM | #22 |
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I wish they made these with a higher compression ratio.
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01-16-2011, 10:11 PM | #23 |
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Mahle can do custom pistons for you. You have to call them. Base price is around $650 for custom EJ Power Pak pistons.
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01-17-2011, 05:59 AM | #24 |
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I was quoted much higher than that for custom Mahles (~$1k... no idea why). Ended up going with CP instead for $550 shipped. I did exactly what you're asking, kim. Stroker 4032 pistons with 9.5:1 CR. What's interesting is that the recommended p/w clearance on those were 0.0015"...
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01-17-2011, 10:25 AM | #25 | |
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