Cylinder wall to piston clearance with Nitrous.
#1525957
10/30/13 03:08 PM
10/30/13 03:08 PM
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70satelliteguy
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Ross recommends .006 clearance with bore size of 4.50 and above. They also recommend an additional .002 with Nitrous use over 250 hp.That comes to 008 total.  That seems like A lot of clearance! What are you guys with Nitrous assisted motors 4.5 or larger running? Thanks Mike 
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: Biginchmopar]
#1525959
10/30/13 03:16 PM
10/30/13 03:16 PM
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Nitrojunkee
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Quote:
That's not alot. Put it where they want it. Good Luck!
x2 I Assume they are Ross forged pieces? You may get a little slap when It's cold, but that's not a lot of clearance.
Run it how they are saying, and you'll be golden.
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: Nitrojunkee]
#1525960
10/30/13 03:40 PM
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70satelliteguy
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Yes they are Ross forged pistons. I just did not want to put it back together at 008 if there would be a problem!  "You may get a little slap when It's cold" I will never be able to hear it anyway  Thanks MIke
Last edited by 70satelliteguy; 10/30/13 03:44 PM.
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: cudaman1969]
#1525962
10/30/13 03:46 PM
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70satelliteguy
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"Fast Hemi's run .012 .A secret they don't tell." Really  Is there a performance advantage to that? Mike
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: 70satelliteguy]
#1525963
10/30/13 03:48 PM
10/30/13 03:48 PM
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moparniac
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On my diamond pistons at 4.505 the piston called for .0065 clearance.
Mopar Performance
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: 70satelliteguy]
#1525964
10/30/13 04:06 PM
10/30/13 04:06 PM
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Nitrojunkee
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Quote:
Yes they are Ross forged pistons. I just did not want to put it back together at 008 if there would be a problem!
"You may get a little slap when It's cold"
I will never be able to hear it anyway
Thanks MIke
Exactly! 
FYI, Diamond recommended .0075 on my custom blower pistons... Minus .002 for hard anodized coating. So I think you're right on!
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: 70satelliteguy]
#1525965
10/30/13 08:25 PM
10/30/13 08:25 PM
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Crizila
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A lot depends on the length of the skirt. I run a pretty short skirt on my forged Icons and their blower application recommended .008 to .010". I set them at .008". When I pulled it down recently, there was some skirt scuffing going on. New build will get .007".
Fastest 300
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: 70satelliteguy]
#1525966
10/30/13 11:28 PM
10/30/13 11:28 PM
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fredericksburg,va
cudaman1969
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Quote:
"Fast Hemi's run .012 .A secret they don't tell."
Really Is there a performance advantage to that?
Mike
my older (90s) had .012 much newer (big name) had .011
whatever works,has to be a reason, they don't make make mistakes like that. Personally i don't know but what i measured. Pay them 250 grand and they will tell. Ask something on SSAH and hear the quiet.
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: 572charger]
#1525968
10/31/13 03:41 PM
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70satelliteguy
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"my 4.50 bore are at 9 thou so i can run my fogger at 300 hp " 572 are those Ross pistons? Do you have any noticeable blowby? Thanks Mike
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Re: Cylinder wall to piston clearance with Nitrous.
[Re: Cab_Burge]
#1525970
11/03/13 08:01 AM
11/03/13 08:01 AM
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they are diamond pistons no blow by ring end gap is 28 on the top and 30 on the second . most of the time i put about 6.5 thou on a piston to wall on a street motor 
Last edited by 572charger; 11/03/13 08:05 AM.
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