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Yes. He is at my house right now, he says that he has the timing at 18 degrees right now without any problems. He's been running the 18 degree timing for a while now. If the motor had pinged, it would've been toast like months ago. But it runs this way very happily. I mentioned the other guys earlier running similar as Mike, I should say that of course those guys have the JWT ECU, but they run similar boost levels with race gas. The point I've been trying to get across, is that octane is the the bottleneck with stock turbos, not the fuel injectors. These guys run higher boost using the octane, not just the jwt ecu, just like Mike. : The 8 degrees of timing was an accident and I would assume it was reset at a more reasonable setting when that was discovered. Since Mike has made plenty of 1/4 passes since his dyno run, I'd assume he's made those passes at high boost with respectable timing. : As far as "just retard the timing," I'm talking about retarding it to 13 degrees or so (just like Jim Wolf does). : I'd go as far as to say that he probably could have run 15 degrees of timing, at 19psi with a hefty dose of high octane fuel like he runs, but I'd rather him comment on that. : You can't always hear detonation, but I've seen Z's run additional boost without an ECU without an audible detonation, and then upon further inspection of the spark plugs, there's still no visual sign of detonation. See no detonation, Hear no detonation, there is no detonation. : I believe that the majority of Z's will be fine in the 12-13psi range on good 93 octane gasoline, with even further increases with the assistence of a high octane racing fuel (ie Sunoco 104). If the mixture did run a bit lean, why not just up the fuel pressure to compensate? This can be achieved with a fuel pressure regulator, or there's an old racers trick that will do the same. : If anyone has good examples of people blowing engines, burning valves, etc at 13ish psi on 93 octane I'd like to see it. I probably wouldn't recommend a 5th gear pull to 150 at full boost, but for the occasional throttle stab or 1/4mi pass in my opinion the Z should be fine.
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