Ahhhh, OK. Your right. I get it. Well nothing seemed to make any
difference at all. I ran the 91 initally because I had the Mopar
Performance PCM and they say you have to run 91 or better. But what
your saying makes sense.
Thanks again,
Mike
On Sat, Jul 19, 2008 at 3:20 PM, Ray Block <BPracing@wowway.com> wrote:
>
>> -----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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