Piston skirt to cylinder wall clearance
07-21-2004, 08:15 AM
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Piston skirt to cylinder wall clearance
I just dropped my new block off at the machine shop to be bored out to 81.5 mm for some JE 9.0:1 CR forged pistons. The machinist there said that he recommends boring them a little larger for a turbo application. What is the general consensus here? I figured that JE would have already taken this into account and made the piston the correct size for the sleeve, not the other way around. Help me out here....
07-21-2004, 08:25 AM
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Re: Piston skirt to cylinder wall clearance (db2integra)
Turbo motors create more heat causing the piston to expand. Your machinist is taking this into consideration. I would just tell him to run the recommended clearances that came with the pistons. I am sure that JE knows more about the expansion tendencies of their pistons than your local machinist.
07-21-2004, 09:51 AM
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Re: Piston skirt to cylinder wall clearance (earl)
From Mr. Honda-tech himself even... advice taken Earl, you are the man. I am sure you get that on occasion though...
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07-27-2004, 10:19 AM
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Re: (Sonny)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sonny »</TD></TR><TR><TD CLASS="quote">
earl is The Duke of Turbo
</TD></TR></TABLE>
lmao
earl is The Duke of Turbo
</TD></TR></TABLE>
lmao
07-27-2004, 10:31 AM
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Re: Piston skirt to cylinder wall clearance (earl)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl »</TD></TR><TR><TD CLASS="quote">bore to 81.5mm and not .01mm more than that. clearance built into that piston</TD></TR></TABLE>
From what I've heard, JE's slap pretty badly. Is this because they spec larger clearances or their alloy does not have as high a silicon content?
From what I've heard, JE's slap pretty badly. Is this because they spec larger clearances or their alloy does not have as high a silicon content?
07-27-2004, 11:44 AM
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Re: Piston skirt to cylinder wall clearance (earl)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl »</TD></TR><TR><TD CLASS="quote">bore to 81.5mm and not .01mm more than that. clearance built into that piston</TD></TR></TABLE>
...but not the SRP's then?
...but not the SRP's then?
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