Miata Mailing List: June 1998, Message #550

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  Just another data point.. My 97 was Pinging at 13-13.5 Deg. timing untill
I went to 89 octane.

   Jason

> -----Original Message-----
> From: miata@realbig.com [mailto:miata@realbig.com]On Behalf Of
> LeanAngle1@aol.com
> Sent: Wednesday, June 03, 1998 11:52 AM
> To: Multiple recipients of list
> Subject: Re: Normally aspirated Mods
>
>
> In a message dated 98-06-03 15:46:30 EDT, jm243@prism.gatech.edu writes:
>
> <<  My main concern is that I maintain my
>  overall reliablility  even though I stretch a  couple of extra
> horses from
>  the engine.....thats why I've decided to stay naturally aspirated.
>
>  I've already increased my timing to 13 degrees Btdc and I'm pinging even
>  on 89 octane.  The timing advance helped marginally with low end torque
>  but I think I'm going to decrease to 12 degrees to avoid running 93
>  octane.
>   >>
>
> * If your main concern is low end torque...and you have a 1.8..go
> to 18 degree
> bump in timing...beware, you may have to up the octane a few
> points....but the
> bottom end will definately improve..never heard of pinging at 13
> degrees..but
> may be due to the quality of gas..are you in California...then I can
> understand...gas quality here is bad...
>
> FWIW,
>
> Aaron
>