Wiseco Pistons

[chaterlea25]

Hi All,
I know some Forum members have fitted Wiseco pistons to their A10's

Does anyone know the Wiseco reference number?

Regards
John O R

[mark]

John,  I got mine from Cake Street Classics and I believe that he had a batch specially made. There are a few different numbers on the box but the main one is 7949MO7200. These are +80 thou, I think that the last 4 digits show this. Other numbers on the box are 2835XC, CW19, S746 and 022208/3/3/1438. The CW19 is the number on the circlip packet I just noticed. Hope this helps.

Mark

[RichardL]

So, I'm guessing, if one goes +80, one probabaly will want to ease up on the compression ratio, maybe like 7.5:1. Does that make sense? If +80 is usable, that would be my next stop when the time ultimately comes. Right now, I'm at 9:1.

Richard L.

[mark]

When I ordered mine I was of the understanding that they only come in the one ratio of about 8.75:1. I have just done 300k on the BSA national rally in South Aus and they performed brilliantly, although my knee wasn't real flash by the end.
Mark

[chaterlea25]

Hi Mark,
Many thanks for the speedy reply,
I will pass  the info on to my friend in the USA

Cheers
John O R

[chaterlea25]

Hi Richard
My quick calculation shows an increase of 18.74cc per cylinder going from standard 70mm to +0.080, 72mm
You would need to know the volume of the compression chamber to exactly calculate the increase in compression
Its too early on a Monday morning to tax my brain any further 
Cheers
John O R