[6pack] Compression boost

[Navarrette, Vance]

	Alan, Stan:

	I am coming to this discussion very late, but a data point is
that I run 9.6:1 CR, with a 270 degree cam on regular (87 octane R+M/2),
never the slightest hint of pinging.
	I run the factory timing of 10BTDC static, 4ATDC dynamic with a
stock dizzy, 13 degrees of mechanical advance at the dizzy.
	I have the later head with the smaller exhaust valve and I run
Zenith carbs with B1AR needles. The plugs are a nice grey brown color.
In short, no issues. YMMV.

	Vance


      Vance Navarrette
    Cogito Ergo Zoom
    I think, therefore I go fast

-----Original Message-----
From: 6pack-bounces+vance.navarrette=intel.com at autox.team.net
[mailto:6pack-bounces+vance.navarrette=intel.com at autox.team.net] On
Behalf Of Foster, Stan
Sent: Friday, June 13, 2008 8:09 PM
To: Alan Salvatore; triumphs at autox.team.net; 6pack
Subject: Re: [6pack] Compression boost

My understanding is that you can go at least as high as 9.5:1 or perhaps
9.6:1
and still be fine on regular gas. At least I hope so, I had my head and
block
machined for 9.6:1 based on that assumption. It would not ruin my whole
day if
I had use a higher octane however.

Stan

-----Original Message-----
From: 6pack-bounces+stan.foster=hp.com at autox.team.net
[mailto:6pack-bounces+stan.foster=hp.com at autox.team.net] On Behalf Of
Alan
Salvatore
Sent: Friday, June 13, 2008 10:56 PM
To: triumphs at autox.team.net; 6pack
Subject: [6pack] Compression boost

I am in the process of rebuilding my 76 motor.
I had it bored out 20 over and got a G2 cam, aluminum flywheel.
I couldn't decide what to do with the head.  I just left it at the
machine
shop and am going to have it milled for
9 to 1 compression.
The nice thing about the 7.5 to 1 compression was that it ran on regular
gas.
Not to sure what effect the 9 to 1 will have on gas requirement;
or if I just should have  bumped the compression even higher.

Al
6pack at autox.team.net
http://autox.team.net/mailman/listinfo/6pack

http://www.team.net/archive

You are subscribed as vance.navarrette at intel.com