> -----Original Message-----
> From: Brian
>
> For starters, I'm wondering hy you went to a higher octane fuel to try and
> pass emissions. The higher octane will burn slower resulting in more
> unburnt fuel entering the exhaust. I'd try running a couple tanks of the
> lowest octane you can get through and trying again.
>
> brian cropp
Good point Brian! I missed that. On my '92, despite all my mods (see
dragtruk link) and higher than stock compression, I've found that it runs
slower at the track on 94 octane than it does on 92. (haven't tried
anything lower since the MP PCM)
Our daily drivers that we race run the same times whether we use 87 or 89
octane. Never felt the need to try any higher octane on those two as
they're still (essentially) stock. :-)
Ray
'92 Dakota 5.2L magnum (12.98 @ 105 mph)
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
'00 Grand Cherokee 4x4 4.7L (15.40 & 86)
'02 Stratus R/T sedan 2.7L (16.12 @ 86)
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