Boring recommendations
So here's my wear on the engine that I'm rebuilding.
Standard is 86.000 mm and here's what I have Cylinders 1,2,3,5 and 6 are mic'd at 86.0425 and cylinder 4 is 86.0679 with the maximum wear being 86.1mm. What bore recommendations do you have for me, considering I need to buy new pistons and rings now that I destroyed my previous ones. Would a .5 mm overbore be too much? I'm going to buy ITM's pistons from a distributor right by my school. As for the boring and honing I might have a machine shop do the boring, or I might take a crack at it myself. Any tips or recommendations? |
Originally Posted by thetremendousti
(Post 268568)
Cylinders 1,2,3,5 and 6 are mic'd at 86.0425 and cylinder 4 is 86.0679 with the maximum wear being 86.1mm. What bore recommendations do you have for me, considering I need to buy new pistons and rings now that I destroyed my previous ones. Would a .5 mm overbore be too much?
My point of view is to go 1mm overbore for two reasons: #1: If you are going bigger, GO BIG... not just "kinda big". #2: .5mm (.020) rings are (or at least used to be) hard to find. |
if your gonna bore and have to get new pistons might as well go out to 89mm
itl make it a 2.9L (get a diesel crank and 9mm rods and youve got yourself a 3.1L stroker:biggrin:) |
^^^ lulz.
Great minds..... |
Originally Posted by NismoPick
(Post 268575)
^^^ lulz.
Great minds..... and compared to an 86.5/87mm bore itl be easier to get pistons and rings too 89mm = KA24 :023: |
Is this going turbo, or are you just going to run it N/A?
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KA has so many aftermarket for it it's nuts. 'If they don't make for your engine. make your engine for them"
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Originally Posted by duowing
(Post 268579)
Is this going turbo, or are you just going to run it N/A?
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Originally Posted by NismoPick
(Post 268585)
Second rebuild on his L28ET in his S30.
I've decided to go with .003" oversized from ITM obviously I have to bore it out, so should I bore it to .0028 and leave some for the hone? Or maybe .0026. Thoughts....ideas....experiences? i'm all eyes |
dose that first one really count.... :037:
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Originally Posted by thetremendousti
(Post 268604)
I've decided to go with .003" oversized from ITM
Originally Posted by thetremendousti
(Post 268604)
so should I bore it to .0028 and leave some for the hone? Or maybe .0026.
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if only i could find the pistons i need. that's the largist part of my build. pistons.
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Originally Posted by FubarI33t
(Post 268664)
if only i could find the pistons i need. that's the largist part of my build. pistons.
|
check your PM's
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well ITM doesn't have my pistons, they CARRY the standard, .02, .03, and .04 but NONE are in stock....
L31et? sounds really FRIGGIN hard |
Originally Posted by thetremendousti
(Post 268681)
L31et?
sounds really FRIGGIN hard |
Originally Posted by thetremendousti
(Post 268681)
well ITM doesn't have my pistons, they CARRY the standard, .02, .03, and .04 but NONE are in stock....
Have you called Nissan? |
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