Drop in power on each dyno run

Calibrations for FlashPro Manager - Use all calibrations at your own risk (dyno tuning recommended)

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ITR1102
Posts: 46
Joined: Tue Jan 26, 2010 8:34 am

Drop in power on each dyno run

Post by ITR1102 » Wed Mar 22, 2017 8:33 pm

Car - 2015 Civic Si with forged 10.5:1 pistons and CT supercharger. Not sure on the pulley size, but was seeing a max of 10.3psi (stock map sensor). Stock I/H/E.
Calibration - US Acura ILX, MAP Based, CT Super Charger, 1000cc. The injector dead times have been changed for the injectors being used. Fuel tables copied from a prior map that the owner claims drove the car well.

Issue - The AFR on the first pull appeared to be decent. On the second pull before making any changes, there was a roughly 5hp drop in power. Third pull, no changes made to calibration and lost another 3-5hp. We didn't hear any pinging, but the knock count kept climbing. We do not know what the engine clearances are or who assembled it. The knock count increased prior to full throttle and at different areas of the map. I've mainly experienced false knock in one particular area of a map but not everywhere. Are sensitivity settings too high or is this most likely piston slap or some other issue? When I last saw this car with the original motor and supercharged, FlashPro was not detecting knock.
We let it sit for a couple of minutes before doing another pull and the power was back up; however, lost about 3-5hp with the next 2 pulls.

To do: Consider replacing the stock intake arm. Replace the map sensor with RDX or Hondata as the reading may be maxed out and boosting beyond what the sensor can read. Recommend a full exhaust.

What else are we missing? Calibration and Datalogged attached.
Attachments
4.fpdl
(8.88 KiB) Downloaded 47 times
Set up run 1.fpcal
(21.68 KiB) Downloaded 48 times

keto06
Posts: 499
Joined: Fri Jul 17, 2009 9:29 pm

Re: Drop in power on each dyno run

Post by keto06 » Tue Apr 04, 2017 9:43 pm

Knock level is 0 but knock retard and high counts? Cylinder 2 is your troublemaker.
Attachments
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07 Civic Si Sedan
Drop-In Filter, Berk HiFlow Cat, 2.5" exhaust, 60a rear mount, Mugen Sport Suspension, FlashPro Tuned by me.
14.6@97 (full weight)
Hit me up for free Hondata Help!

ITR1102
Posts: 46
Joined: Tue Jan 26, 2010 8:34 am

Re: Drop in power on each dyno run

Post by ITR1102 » Wed Apr 05, 2017 12:29 pm

Do you believe there is an assembly or other mechanical issue with cylinder 2, or that it needs timing retard on that one cylinder? I have yet to use individual cylinder timing retard on an engine.

Zperformance
Posts: 100
Joined: Thu Jul 14, 2016 12:32 pm
Location: Fresno,Ca

Re: Drop in power on each dyno run

Post by Zperformance » Sun Apr 09, 2017 5:30 pm

Compression test. Add more fuel into cylinder 2 and see.

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