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 Post subject: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 9:01 am 
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My tune is for 93. What do you do at Hallett with only 91? Does octane boost work? Mix race fuel? What ratio?

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Ken O. -2003 BMW///M3 - 199 TTB
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 Post subject: Re: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 10:25 am 
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Just mix 50/50. I am kinda screwed! Going to buy that expensive track stuff and ice. Lots of ice!!

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 Post subject: Re: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 10:27 am 
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tow and bring a few jugs of the good stuff from TX with you

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 Post subject: Re: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 11:30 am 
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kbrew8991 wrote:
tow and bring a few jugs of the good stuff from TX with you

I have a 91-octane tune and take two jugs of 93-Texas Tea.

Don't you have an email tune? If so, and you're close enough to deontation that 2-octane points puts you over the edge, then I envy your bravery.

I have some detonation headphones you can borrow to see if you're detonating, and you can even record into an MP3 player during your session, then have a listen. I use them for road tuning and dyno tuning to listen for combustion irregularities that are outside the sensitivity-range of the naked ear.


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 Post subject: Re: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 11:54 am 
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I might try the headphones.

I now have a dyno tune.

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Ken O. -2003 BMW///M3 - 199 TTB
NASA Texas TTB Champion '13, '12, '11, '10


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 Post subject: Re: 91 fuel at Hallett
PostPosted: Wed Jun 08, 2011 12:30 pm 
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ken o wrote:
I might try the headphones.

I now have a dyno tune.


Tell me about how they loaded up the dyno in 5th gear, ran the full sweep, then pulled the wheel speed down to 3000rpm, and back up to redline...WOT the whole way. Yeah, this is the best way to see if your dyno guy is worth his salt. When your exhaust plumbing is glowing yellow, and then you make a pull on the dyno without detonation, you know it's safe.


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