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Cause of lifted ring lands on pro charger motor

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Old 08-11-2015, 10:55 PM
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Originally Posted by C1000 View Post
Artic What fuel ratio range have you found to be ok with the procharger under some boost WOT 11:1 give or take?
Define "some" boost, at 14 lbs I shoot for11.2 to 11.6, made decent power there too, above 12.0 went down hill, below 11.2 dropped fast too. At 0-5 psi I start around 12.0 to11.8,
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Old 08-11-2015, 10:56 PM
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some boost,,what do you mean by that?
I tuned some 540's w/ afr 335's and 8.5-1 comp ratio in a 382 fastech w/ arneson's,0-4lbs of boost is in the 12.2/3 range w/ 33 of timing,5-7lbs gets 11.6/8 w/ timing at 32 and 8-10lbs gets 11.2-11.4 w/ 31 timing.boats run a best so far to 112mph in the ocean.btw,I set up his cylinder heads.
video of us after some lower load cell fuel trimming
https://youtube.com/watch?v=OhwGR64_Ghw
Pretty much EXACTLY how I tuned mine too
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Old 08-11-2015, 11:11 PM
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Now that's a Performance Boat.
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Old 08-12-2015, 07:10 AM
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Plain & simple, if you are running the procharger kit for a merc EFI they way they say to do it, the pin has been removed, their bandaid setup for the fuel/ECM is just that...a joke, all they do is jack of the fuel pressure to hopefully get by. pretty much a pull and pray method. if you want it to live need to fix the fuel rain issues, change the entire fuel delivery system and have the ECM tuned(at least) or upgrade the ECM to a aftermarket setup, ck with Haxby speed or Youngs performance, both know the deal very well, one other is to trash the merc EFI and swap to a blow thru carb or complete aftermarket EFI...good luck
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Old 08-12-2015, 08:28 PM
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Artic and Sutphen thanks for the feedback I was thinking 5-7lbs on a 502 carbed set up Ill shoot for 11.5
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