Piston To Wall Clearance ???

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Piston To Wall Clearance ???

Post  colormebad on April 14th 2014, 7:13 pm

Whats the most piston to wall clearance you can safetly run on diamond pistons ??? This is a nitrous motor...

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Re: Piston To Wall Clearance ???

Post  Lem Evans on April 14th 2014, 7:40 pm

It'd depend on how the skirts were designed . There is not one answer here.

I suspect you would be better served to ask the people that make them.


Last edited by Lem Evans on April 15th 2014, 1:29 pm; edited 1 time in total

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Re: Piston To Wall Clearance ???

Post  colormebad on April 14th 2014, 10:37 pm

Lem Evans wrote:It'd depend on how the skirts were designed . There is not one answer here.

I suspect you would be be served to ask the people that make them.  



My machine shop says 8-10 with 2 stages of nos, Diamond says 7... Diamond says they will handle all the nitrous i throw at them...


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Re: Piston To Wall Clearance ???

Post  cool40 on April 15th 2014, 12:26 am

So whats the problem?
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Re: Piston To Wall Clearance ???

Post  colormebad on April 15th 2014, 9:05 am

cool40 wrote:So whats the problem?  



The machine shop has the p/w clearance on .009 and thats why i was asking the ?

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Re: Piston To Wall Clearance ???

Post  the Coug on April 15th 2014, 12:33 pm

My suggestion is you are not comfortable with your machine shop then find one you are comfortable with....
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Re: Piston To Wall Clearance ???

Post  colormebad on April 15th 2014, 12:55 pm

All is well....Just talked to diamond and they said i could go up to 10 on these pistons running 2 stages of nos....

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Re: Piston To Wall Clearance ???

Post  supervel45 on April 15th 2014, 2:39 pm

More power more heat more expansion. Sometimes looser is better, but it sounds like you almost split the difference, and it should be OK. I would be sure to keep the engine warm, before you hit it though. Block heaters make sense in cold weather, and get brought up alot I have noticed around here. This may be a good reason why, besides fuel conservation.

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Re: Piston To Wall Clearance ???

Post  richter69 on April 15th 2014, 4:38 pm

Run it
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Re: Piston To Wall Clearance ???

Post  colormebad on April 15th 2014, 4:41 pm

 
richter69 wrote:Run it


Will be firing it up in a few days.... Very Happy 

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Re: Piston To Wall Clearance ???

Post  crittersf1 on April 16th 2014, 7:49 am

Need a video.
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Re: Piston To Wall Clearance ???

Post  richter69 on April 16th 2014, 8:18 am

I thought it ran already? Or is this a different build?
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Re: Piston To Wall Clearance ???

Post  colormebad on April 16th 2014, 8:45 am

richter69 wrote:I thought it ran already? Or is this a different build?

Yeah it ran good...Just had that oil weap between the head and block at driver rear....After pulling the motor and lookin at everything with the ole bi-focals, found the upper threaded hole above the oil return hole was raised .007 where it hadnt been chafered...Im about 99 % sure that was holding up the gasket enough to cause the oil weap....Can't stand a oil leak....

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Re: Piston To Wall Clearance ???

Post  the Coug on April 16th 2014, 3:02 pm

if you are worried about that spot go to Harbor Freight and buy you a carborandum wit rock and use WD40 and smooth it off...I hit all my gasket surfaces with this rock and especially the pan rails....and intake surface... but to make sure you never let your buddies try and sharpen their knives with this rock I have one in my tool box for engines only.....
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Re: Piston To Wall Clearance ???

Post  colormebad on April 16th 2014, 3:22 pm

I bought this off ebay that others have used....


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