about 16.2 psi. Greg Dupree had some cars in SoCal running 17-19 psi at the time on race gas (just for short bursts at the drag strip). I was too scared to do that, but 16.2 was working fine with no detonation. I would e-mail Greg or Seb and ask them. I would never run more than 15 psi on 93 octane however. I always used the "Jim Wolf" mentality that anything over 15.5 psi on his programming will max out the injectors. But running race gas apparently will let you as it did for me. But his Bentley can probably make a much broader range of adjustments on the fly with the race gas in the tank all by itself. It's certainly possible. I think maybe it has something to do with the OBDII cars and beyond having more complexity to them. They can adapt on their own to higher octane.
TTZMatt: did i ever think id be the guy to sell the z or go kart? TTZMatt: no TTZMatt: but now that ive found true love, i dont care about it anymore TTZMatt: lol - TTZMatt 10/19/07 "It's a little longer and skinnier than the one i bought." - TTZMatt on 10/22/06

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