 911 pistons in a type 4?, can it be done? |
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| tat2dphreak |
 Sep 12 2003, 11:04 AM
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#1
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stoya, stoya, stoya  Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region   |
topic explain's it all... can it be done? I know the answer is probably "no,dumbass of course not" but it doesn't hurt to ask right?!
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| Brad Roberts |
Sep 12 2003, 11:09 AM
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#2
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
Yep. I have two engines right now that have 98mm turbo 911 P+C's in them (Aluminum cylinders)
From Mahle... B |
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| Dave_Darling |
Sep 12 2003, 11:12 AM
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#3
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Ain't nothing magical about Type IV pistons. Or 911 ones, for that matter. As long as the wrist pin hole is a reasonable size, and the wrist-pin-to-crown height is reasonable for your configuration, you can use Yugo pistons if you really like. I know of people who have used Chevy ones, for that matter. (Heck of a lot cheaper than Type IV or 911 pistons!)
The 911 cylinders, however... That's a whole lot more complex. You have to re-drill the holes for the head studs, you have to do some machining to the cylinder bottoms (I think), maybe more. Plus you get little dinky cooling fins so you get to re-do the cooling system to work better with those. Or you don't bother, and live with whatever you get... --DD |
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| tat2dphreak |
Sep 12 2003, 11:18 AM
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#4
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
I just didn't know if they had a hugely different wrist pin location/size... I guess I should have asked the more accurate/general question of what needs to be done to make other cars pistons work with our engines? thanks for the quick response guys!
do you know of any "direct swap" pistons? like a chebbie size that has a 24mm wrist pin? or am I just dreamin'? (IMG:style_emoticons/default/smile.gif) |
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| Brad Roberts |
Sep 12 2003, 11:37 AM
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#5
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
The wrist pin is always the issue. Raby uses Typ1 VW pisons on a different rod in his combos (cheaper to get type1 HP goodies and use them in the T4 than it is to buy T4 specific goodies)
B |
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| tat2dphreak |
Sep 12 2003, 11:42 AM
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#6
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
yea, this is just one of those wild hairs of curiosity that I got up my butt! I HAD to ask and see if anyone had done this or if it was just a worthless idea! thanks for the help.
I knew about the type 1 pistons/rods... but I know that requires basically changing everything... rods, crank, and pistons... |
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| J P Stein |
Sep 12 2003, 01:21 PM
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#7
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
AFAIK, the turbo pistons are the only flat tops.....and not cheep.
All the rest are domed for a hemispherical head. You'd play hell using them. The wrist pins would be the least of your problems. |
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| Jake Raby |
Sep 13 2003, 12:03 PM
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#8
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Brad is correct...I modified several of JE's TI pistons to get some awesome customs for the TIV.......I have even used some off the shelf TI pistons to make good clean power!
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