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Off centered piston...WTF?!

This is a discussion on Off centered piston...WTF?! in the Engine Building forum
i don't understand how it can be off center??? is it on backwards?? or is the rod on the crank backwards?...
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Old 12-12-2005, 03:01 PM   #1
 
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i don't understand how it can be off center??? is it on backwards?? or is the rod on the crank backwards?
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Old 12-13-2005, 09:29 AM   #2
 
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sounds like a fucked up piston to me...
damn, that sucks man

if you are in that much of a rush you could probably dremel the piston, but thats something i would do so you might want to rethink it...

i don't normally advise people to do shit i would do...
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Old 12-13-2005, 03:54 PM   #3
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That's....weird...


Get some pictures of it....


[img]style_emoticons/<#EMO_DIR#>/shrug.gif[/img]
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Old 12-14-2005, 08:49 AM   #4
 
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wow, something is seriously wrong there...
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Old 12-14-2005, 09:04 AM   #5
 
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the only way that could happen, would be a bent rod....

and i sent the cam with some battery life left-- surely enough to snap 2 pics
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Old 12-14-2005, 09:22 AM   #6
 
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THATS A FREAKIN BENT ROD! ITS OBVIOUS, YOU CAN SEE IT? AND WHO PUT IT TOGETHER?


Their freaking retarted!
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Old 12-14-2005, 10:13 AM   #7
 
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Originally Posted by eicivic @ Dec 14 2005, 11:22 AM) [post=600113
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Their freaking retarted!

X 10.

Seriously, what builder would put that together and deliver it to a customer?? You need to fire that piece of shit. Get a refund or something.
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Old 12-14-2005, 12:21 PM   #8
 
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does that rod look untrue to anyone else besides me?

those are stock pistons?
i thought maybe they were aftermarket knock offs that could have an error in their making...
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Old 12-14-2005, 12:22 PM   #9
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The rod looks bent to me.
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Old 12-14-2005, 04:05 PM   #10
 
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another fine cali engine builder [img]style_emoticons/<#EMO_DIR#>/happy.gif[/img]

sorry, i'll keep my mouth shut...
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Old 12-14-2005, 05:09 PM   #11
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When I said 'bent' rod, I meant twisted...



and from that image, I'm sticking with the problem being in the rod.

Swap the piston over to another rod, and that rod over to another piston, and install them in the block. If the other piston is off-center, it's the rod. If the same piston is still off center, it's the piston.
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Old 12-15-2005, 01:00 AM   #12
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...since they did such a good job in the first place
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Old 12-15-2005, 09:48 AM   #13
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60 miles >
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Old 12-15-2005, 10:05 AM   #14
 
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i'd bring it back to the orig shop. demnad that they fix it for free.

if they don't bad mouth them all over the domestic board.
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Old 12-15-2005, 04:35 PM   #15
 
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he should have seen that, called you, and said hey- something is up.
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Old 12-16-2005, 10:38 AM   #16
 
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he should have seen that, called you, and said hey- something is up.


my vote is gonna go to the piston being not right

what rods are they? stockers?
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Old 12-17-2005, 10:59 AM   #17
 
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if the rods havent changed its gotta be the piston then.
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Old 12-17-2005, 12:34 PM   #18
 
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Originally Posted by TurboMirage @ Dec 17 2005, 12:59 PM) [post=601586
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if the rods havent changed its gotta be the piston then.

I don't agree.... If the piston were bent/warped then how would it go into a Perfectly Cylinder hole and not be a tight squeeze especially with the rings. If they are what the appear to be as stock cast pistons then im pretty sure they would crack or break before they would alter by bending or warping.


Just my .02
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Old 12-17-2005, 03:15 PM   #19
 
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i dont think those are stock pistons.
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Old 12-18-2005, 11:02 AM   #20
 
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Originally Posted by Blanco @ Dec 17 2005, 06:20 PM) [post=601660
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Indeed they are not. They are cast, but they're Nippon Racing pistons not OEM Honda pistons. The Nippon pistons are suppposed to be able to handle up to 300hp.

And I'm not thinking that the piston is warped, I'm thinking incorrectly cast and/or machined in some way. I'm going to be able to drop it off on Monday to hopefully find out what's going on.

That helps sum it up...
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Old 01-10-2006, 03:50 PM   #21
 
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I'm thinking incorrectly cast and/or machined in some way. I'm going to be able to drop it off on Monday to hopefully find out what's going on.
so what ever happened with this???

are nippons junk?
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Old 01-11-2006, 04:33 PM   #22
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Guit-Guit?
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Old 01-11-2006, 11:12 PM   #23
 
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sorry to see that. i know others have said this but it looks like maybe the rod was drilled at an angle to get the piston pin through? hope you get this fixed and i would like to hear how this turns out since i was interested in nippons.
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Old 01-12-2006, 11:03 AM   #24
 
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Nope, that machine shop sucked.
lmao

so thats a nope that you did not get it figured out?

or a nope it was not the piston, the machine shop fucked it up?
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Old 01-13-2006, 09:31 AM   #25
 
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so how the hell did it happen?

did the apprentice bend the rod?
or was the rod junk?
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