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HELP Request [REP] - Reduced Engine Power - Twin Turbo 427 Corvette

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Old 02-27-2017, 03:27 PM
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Turbo-Geist
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Default HELP Request [REP] - Reduced Engine Power - Twin Turbo 427 Corvette

I have a 1999 C5 Corvette FRC with a 427 cubic inch engine and twin Precision 6265 turbos. Yesterday at the track, it went into REP mode on 3 out of 10 passes. It happens during launch when trying to get more aggressive than a 1.5x 60 foot. The car has the potential to go low 9s with the 6 speed transmission if I could launch it more aggressively, but getting aggressive with the boost controller and trying to apply the throttle quickly results in an aborted pass and spending your time going down the track at 25 mph. It's not very fun when the event is being broadcast online and it looks like the car can't get out of its own way. I told people I was trying to tune around it with HPTuners and they just scratched their head.

I have attached the tune file. I'll upload all (3) log files later this afternoon from when it went into REP mode. The tune is scaled 50% and I've maxed out all of the tables that I know of to change. The combo spools very quickly. There is no 2-step, but it is at 19.2 psi by 18 mph and 44 lb/min at 24 mph.

Please take a look at the tune and let me know if there is anything I have overlooked.
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Old 03-01-2017, 09:46 AM
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Turbo-Geist
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I must have posted in the wrong section. Is this "C5 Scan and Tune"?

Last edited by Turbo-Geist; 03-01-2017 at 09:47 AM.



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