[6pack] Combustion Chambers

[EdB]

Brian:

You might find this MG (sorry) site of interest as it is supposed to stop 
pinging.

.  I first learned abiut grooving a cylinder head from an article in " Farm 
Show " paper

Ed Bratt
Regina Saskatchewan

1976 TR6

----- Original Message ----- 
From: <brian at asmoothmove.biz>
To: "'6pack'" <6pack at autox.team.net>
Sent: Friday, March 09, 2012 10:06 AM
Subject: [6pack] Combustion Chambers


>I thought I would share with you another confirmation of a cure for pinging
> found both in the 6-pack archives and in Kastner's Competition Preparation
> Manual.
>
>
>
> A 1972 engine with a total of .125" shaved (.075" when rebuilt in '04 and
> another .050" 4 years ago) to bring the compression up to 10.1 (measured 
> via
> liquid cc method). Changing timing and fuels never made a real difference,
> however smoothing out all the sharp edges in the combustion chamber has
> yielded excellent
>
> results. No pinging or run-on, period.
>
>
>
> Being fairly new to the Triumph brand when I originally rebuilt the 
> engine,
> I thought just shaving the head, a hot cam and headers would bring
> significantly more power. Wrong! Making power with these engines is more
> complex than with the American V-8's of which I was previously familiar. I
> went back to original cam and exhaust four years ago, but until now the
> pinging remained.
>
>
>
> Your mileage may vary.
>
>
>
> Brian J. Alwin
>
> 1972 TR6 CC79085
>
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