[6pack] Compression boost

[Raymond Hatfield]

I plan on taking my TR engine up to 9.5:1 based on the fact that my Miata runs on regular with that compression ratio - it will ping a tiny bit under hard acceleration UNLESS I'm using E10 gasoline.  Never pings with mid-range or hi octane gas.

Raymond


--- On Fri, 6/13/08, Foster, Stan <stan.foster at hp.com> wrote:

> From: Foster, Stan <stan.foster at hp.com>
> Subject: Re: [6pack] Compression boost
> To: "Alan Salvatore" <tr6parts at charter.net>, "triumphs at autox.team.net" <triumphs at autox.team.net>, "6pack" <6pack at autox.team.net>
> Date: Friday, June 13, 2008, 10:08 PM
> 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