Good enough for me! Thanks Tom.
John
-----Original Message-----
From Tom Speed [mailto:tspeed at carolina.rr.com]
Sent: Thursday, August 19, 2004 9:06 AM
To: John.Deikis@med.va.gov
Cc: Spridgets
Subject: RE: Re AE Powermax Hepolite pistons
John,
My figures on the displacement of the 21253 piston is the result
of our actual measurement with a burette and a sheet of Lexan. We also
measure the combustion chambers and the head gasket.
Regards,
Tom Speed
12431 Lawyers Road
Charlotte, North Carolina 28227
-----Original Message-----
From John.Deikis at med.va.gov [mailto:John.Deikis@med.va.gov]
Sent: Wednesday, August 18, 2004 4:58 PM
To: spridgets@autox.team.net
Cc: tspeed@carolina.rr.com; nosimport@mailbag.com; brian@uunet.ca;
KansaR@diebold.com
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 at 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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