Re: Compression Ratio

["Hiro Nishio" <hiro@octagongarage.com>]

Hi Ross,

I rebuilt my J2 engine (847cc) at the compression ratio of 7.48. Theoretical 
CR after
8psi supercharging is about 8.6, and could win a couple of Vintage Car Races 
recently,
using ordinary pump petrol. It has my own special lightweight pistons and 
can rev
up till 7000rpm. It produces about 60bhp I hope - rather optimistic, but it 
is actually enough
for 1060lb dry weight road/racing J2771 with ENV box on public road.
If you want I can send calculation chart of S/Ced compression ratio.

Good luck,
Hiro Nishio
Kobe, Japan

----- Original Message ----- 
From: "Ross & Georgia Kelly" <rgkelly@bigpond.com>
To: <mg-mmm@autox.team.net>
Sent: Thursday, January 01, 1970 11:16 AM
Subject: Compression Ratio


> MMM'ers,
>
> What would be recommended as compression ratio for supercharged 750cc J
> motor.
>
> Having recently stripped a few teeth from the crown wheel and pinion 
> during
> the hill climb at the NAT Meet I am taking the opportunity as car is off
> road to have the engine rebuild as the compression was very low.
>
> regards
>
> ross
> J3763
> tight lines and corners
///  unsubscribe/change address requests to majordomo@autox.team.net  or try
///  http://www.team.net/cgi-bin/majorcool
///  http://www.team.net/mailman/listinfo
///  Archives at http://www.team.net/archive/mg-mmm
///  Send list postings to mg-mmm@autox.team.net