Question about the look of pistons : V-Twin Forum: Harley Davidson Forums

jpowell490 · 03-02-2008, 07:40 PM

Hey All,

Well I think I got the SERT pretty well figured out. I increased the VE tables on the front and rear cylinders by three mouse clicks throughout the range. Bike seems to be doing well, plugs are clean - white. I shined a flashlight down in the back plug hole today and the piston is super clean all the way around except in the very middle where the plug fires. It looks like black - tan carbon build up. Is this normal or do I have it too rich or too lean?

My bike is a 2008 xl 883 with 650 miles on it, so it is pretty new.

Thanks for any help.

Jason

MouseGB · 04-10-2008, 01:48 PM

Hi,

What is SERT? I'm guessing it's the laptop software to modify the injection system mapping.

springer- · 04-10-2008, 02:17 PM

Quote:

Originally Posted by MouseGB

Hi,

What is SERT? I'm guessing it's the laptop software to modify the injection system mapping.

Thats what it is, here is more about it ... http://www.v-twinforum.com/forums/v-...wers-here.html

MouseGB · 04-10-2008, 04:57 PM

Thanks, feels weird having the OEM injection system open to mapping. Never happen in the car world

claydbal · 04-10-2008, 08:13 PM

Quote:

Originally Posted by MouseGB

Thanks, feels weird having the OEM injection system open to mapping. Never happen in the car world

i used TWEECER on my 95 mustang! yep, it happened.

snakeman48 · 04-10-2008, 09:58 PM

The diesel truck people remap their engines and transmissions all the time.

I have a remap of my Duramax ECM right now. Did it with EFILive software.

HARLEYMANIAC · 04-11-2008, 01:30 AM

I remap my Subaru WRX from time to time

in europe most all turbos and diesel car get remaped ( chip tuning ).

Fred

Jeffytune · 04-11-2008, 01:37 AM

Quote:

Originally Posted by jpowell490

Hey All,

Well I think I got the SERT pretty well figured out. I increased the VE tables on the front and rear cylinders by three mouse clicks throughout the range. Bike seems to be doing well, plugs are clean - white. I shined a flashlight down in the back plug hole today and the piston is super clean all the way around except in the very middle where the plug fires. It looks like black - tan carbon build up. Is this normal or do I have it too rich or too lean?

My bike is a 2008 xl 883 with 650 miles on it, so it is pretty new.

Thanks for any help.

Jason

Hi Jason.

You really should be setting this up on a dyno, not just playing with it.

You can do a lot of harm to the engine without knowing just what the result of the adjustments are doing to the engine.

You can burn a piston, or ping a hole through one, and no, it will not be under warranty because you caused it.

Please have a dyno tech set this for you.

jpowell490 · 04-11-2008, 01:28 PM

Jeffy,

I traded the bike for the night train. It was running great, I loaded a map and increased both the front and rear VE tables by 3 throughout the map, it worked nicely.

MouseGB · 04-11-2008, 04:40 PM

tuning should only be dealt with by those that know, simple as that