[Fot] GT6 pistons...again

Sat Jan 23 12:08:10 MST 2016

Custom piston manufacturers are exactly that, they make pistons to customers specs.
Give them numbers, they supply the rest.
Some of the info that they will want in addition to the basic bore is skirt type, dome configuration, offset if any, compression height, ring width & backspace, top ring land width, pin specs, etc etc. Also be absolutely sure of your finished bore size, and be clear on the piston to wall clearances, it's always best to have the pistons done to slightly oversize, so the last few thou can be taken out of the bore in the final honing to get the correct clearances. Then of course the ring end gap has to be considered as well.
This, or as has been mentioned, a job sheet number.
I deal primarily with JE but the others are pretty much the same.
Glen

-----Original Message-----
From: John Hasty <jhasty at mhc-law.com>
To: 'Duncan Charlton' <duncan.charlton54 at gmail.com>; Jim Gray <toodamnfunky at comcast.net>
Cc: FOT list <fot at autox.team.net>
Sent: Sat, Jan 23, 2016 11:56 am
Subject: Re: [Fot] GT6 pistons...again

That’s the same with J&E you specify what you want

From: Fot [mailto:fot-bounces at autox.team.net]On Behalf Of Duncan Charlton
Sent: Saturday, January 23, 2016 10:17 AM
To: Jim Gray
Cc: FOT list
Subject: Re: [Fot] GT6 pistons...again

I’ve ordered a few times from them.  The first time I sent the a piston to measure and they replicated it exactly other than bore diameter, and most recently I knew the job number for the piston order make ten years ago by the previous owner, so I just gave them that number and the 0.040” overbore size I wanted.

Some manufacturers I’d contacted required a minimum order of pistons or a certain dollar minimum.  Venolia was willing to sell me just two new pistons for a 1936 V-twin motorcycle engine for a very reasonable price.

Duncan

(Texas)

On Jan 22, 2016, at 8:22 PM, Jim Gray <toodamnfunky at comcast.net> wrote:

The machinist that is working on my project GT6 was kind enough to source parts at a discount for this project and when he called Venolia about 

Pistons they told him they only make them on a custom basis. The person he spoke with even asked for specs.

Is this how everyone else get’s their pistons from Venolia ? If Venolia gets to be a problem can anyone suggest a source for forged pistons ?

Thanks as always,

Jim Gray

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