 NPR pistons?, any good for a rebuild? |
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| tat2dphreak |
 Sep 2 2003, 03:07 PM
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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   |
saw these on ebay, and stock pistons seem to be getting rare.. are these any good?
NPR pistons on EBAY |
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| Jake Raby |
Sep 2 2003, 03:37 PM
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#2
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Engine Surgeon Group: Members Posts: 9,396 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
They are a decent piston...But I have seen one set up to 23 grams out of balance....double check them all.Also check the piston ring end gaps. I saw some supplied with rings that had .030 out of the box!
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| Charles Deutsch |
Sep 2 2003, 03:50 PM
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#3
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Unregistered |
They're Japanese (Nippon Piston Ring) which usually means it's good quality.
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| tat2dphreak |
Sep 2 2003, 04:01 PM
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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 |
cool! they may be they break I was looking for to get my baby back limping, if not running!
thanks for the info!! |
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| Brad Roberts |
Sep 3 2003, 12:38 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 |
Careful. Running these on your 1.7 will mean the heads need to be opened up for the new cylinders. Only the 1.8 and 2.0 heads are direct bolt on with these.
B |
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| sj914 |
Sep 3 2003, 02:18 AM
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#6
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Senior Member Group: Members Posts: 805 Joined: 20-August 03 From: San Jose, CA Member No.: 1,053 |
I had the NPR 96mm big bore kit in my 1.7 and yeah I had to get the heads opened up too. Overall the NPR's held up pretty good to the beating I put them through.
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| Gary |
Sep 3 2003, 07:18 AM
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#7
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Senior Member Group: Members Posts: 744 Joined: 12-January 03 From: Mount Airy, MD Member No.: 134 Region Association: MidAtlantic Region 
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Passed 20k on my rebuild recently, also NOS NPRs - 66X96 = 1911cc. I did have them dynamically balanced with the rods, crank, flywheel and pressure plate. Makes for a nice smooth ride.
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| tat2dphreak |
Sep 3 2003, 09:28 AM
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#8
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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 |
guys, these are 90mm... stock 1.7... why do I ned to open the heads up for the same size?
I want to use these until I can save the pennys in my piggy bank to get one of jakes kits for my 1.8 Bus engine and make it a 2056... |
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| Dave_Darling |
Sep 3 2003, 11:29 AM
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#9
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914 Idiot Group: Members Posts: 15,002 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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They were thinking these were 96es... But some 96es fit in the 1.7 heads. They're really really thin, though, and tend not to be reliable.
--DD |
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| tat2dphreak |
Sep 3 2003, 11:56 AM
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#10
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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, I've heard about how bad those were... but I was just afraid that these NPRs used a super thick cylindder that wouldn't fit in the 1.7 head...
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| Brad Roberts |
Sep 3 2003, 12:07 PM
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#11
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
DOH !!.
I did think they where 96's... My bad.. B |
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| Charles Deutsch |
Sep 3 2003, 12:21 PM
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#12
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Unregistered |
We need a Homer Simpson smilie ...
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| Brad Roberts |
Sep 3 2003, 12:23 PM
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#13
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
The thought of someone actually "building" a 1.7 engine scared me..
Find a free 1.8 and make it a 1911... or find a used bus 2.0 and make it a 2056 with a different cam. B |
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| Gary |
Sep 3 2003, 01:24 PM
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#14
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Senior Member Group: Members Posts: 744 Joined: 12-January 03 From: Mount Airy, MD Member No.: 134 Region Association: MidAtlantic Region
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I think the wrist pin is different for the 71mm crank/rods... The 1911 works out nice though...
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| tat2dphreak |
Sep 3 2003, 02:13 PM
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#15
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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 have a 1.8 already... and when I pull it, the 1.7 will go in until I can turn it into something more respectable... I hadn't thought of 1911cc... I was thinking of buying a kit from Jake and turning the 1.8 to a 2056... but the 1.7 needs to last long enough to get my piggy bank nice a fat! (IMG:style_emoticons/default/smile.gif)
also I was thinking if I get the 1.7 running right, then I could be patient and wait for someone to convert to a six and buy their 2.0!!! which would make the jump to 2056 much easier!!! (and cheaper) I'm all about cheaper! |
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