I have a 21251 piston here, and for that one, I wouldn't be surprised if the
dish was 8.09cc.
Later, Paul A
----- Original Message -----
From <John.Deikis at med.va.gov>
To: <spridgets@autox.team.net>
Cc: <tspeed@carolina.rr.com>; <nosimport@mailbag.com>; <brian@uunet.ca>;
<KansaR@diebold.com>
Sent: Wednesday, August 18, 2004 1:58 PM
Subject: Re AE Powermax Hepolite pistons
> Several people have shared their opinions with me on the dish size of the
AE
> pistons from Winners Circle. I've appended Tom Speed's information
because
> he has proven to be pretty knowledgeable when it comes to racing Sprites.
> Below that is the email I received from Federal Mogul, manufacturers of
the
> AE brand of piston.
>
> My pistons are part #21253. Winners Circle says they are 6.5cc. Tom says
> 6.2cc. F/M tech guy says 8.09cc. I understand these are made in the UK by
> blacksmiths, and a couple of cc's don't amount to much when you're forging
a
> plow, but only one of our contestants can be correct and take home the
2004
> Panoz we have available as a prize today.
>
> Has anyone done (or have an uninstalled piston and is willing to do) a cc
> volume check with a plate and graduated burrette? Let science prevail!
Am
> I running 10.9:1 or not?!
>
> JohnD
> -------------------
>
> John,
> A/E sells two pressure cast pistons. Part# 21253 are the
> replacements for the old Hepolite PowerMax pistons and have a 6.2 cc
> dish. Part# 21151 are replacement pistons for the stock pistons and have
> an approximately 8 cc dish. We run a 1310 cc (1275 +.040) motor in our
> HP/LP race car in SCCA races. Under the LP rules we are restricted to
> 11.0 to 1 compression ratio. We use the 21253 pistons in our race motors
> and they work well and cost a lot less ($325) than other racing pistons
> ($500+)
>
> Regards,
>
> Tom Speed
> www.mgracer.com
>
> -----Original Message-----
> From: Geoff_Waterhouse@eu.fmo.com [mailto:Geoff_Waterhouse@eu.fmo.com]
> Sent: Tuesday, August 10, 2004 11:31 AM
> To: John.deikis@med.va.gov
> Subject: 21253 Piston
>
>
> Hello John,
> The dish volume on piston reference 21253 is 8.09cc.
> With regret there are no published figures for piston temperatures. AE
> Aftermarket pistons are standard replacement equipment, designed to
operate
> within OE specifications and design tolerances.
>
> Best Regards
> Geoff Waterhouse
> Technical Services Administrator.
>
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