Using water-only system year-round? Feedback?

[parmas]

Originally Posted by FI_Rubicon

Yes, with the Diablosport Trinty, I can carry a number of tune files in the device and flash the PCM when I want to change a tune. And that is indeed what I am doing.

The device also allows you to customize the tune with quick adjust parameters that take less time to fiddle with than loading a complete tune.

The interesting parameters that I have available (as software "knobs") are:

I can go up to 10 degrees of advance or retard:
WOT SPARK 1-3.8krpm
WOT SPARK 4-4.8krpm
WOT SPARK 5-7krpm


I can add or subtract up to 20% fuel:
WOT FUEL 1-3.8krpm
WOT FUEL 4-4.8krpm
WOT FUEL 5-7krpm


I have WBO2 connected and the device allows me to monitor and log interesting PIDs like:

ST KNK RETARD
LT KNK RETARD
BASE SPK
SPK ADVNC

Short term knock retard seems to just be the difference between BASE SPK and SPK ADVNC.

Anyway, before installing the HFS-4, my tune already had as much timing as I was going to get out of it.

Here are my settings for 25% methanol by weight:

I can go up to 10 degrees of advance or retard:
WOT SPARK 1-3.8krpm +8*
WOT SPARK 4-4.8krpm +6*
WOT SPARK 5-7krpm +8*


I can go rich or lean by up to 20%:
WOT FUEL 1-3.8krpm 2% lean
WOT FUEL 4-4.8krpm 5% lean
WOT FUEL 5-7krpm 6% lean

I think ignition is pretty much dialed in with the above and I get no long term knock retard and a little short term retard under extreme conditions but I understand that to be normal.

AFRs are about 11.6% across the RPM band at WOT and I am still fine tuning.

Although the control knobs are nice and simple I really don't like them at all.

From experience, I learnt to better adjust a basemap accordingly instead.

Could you share with us what engine/head/turbo etc.. specs you have. Also ignition timing values/ spark plugs over stock and ignition system is a good reference aswell?

Mine was an Forged 1.5L 8.5:1 compression / complete stock head / GT2560R @ 22psi 6800-7200rpm.

Ignition system is haltech truck coils x 4 with high tensions. Stock heatrange worked fine with 16psi while increase heat range by 1 with 22psi.

Ignition timing was high 40Degrees on low boost tapering low 40s on high boost.

AFR was found to be 13.5-14 running WM40.