just got a 95 kit put in my 06 ultra with a pcIII, was wondering if I needed to get my ecm remapped with the stage 1 95" map from HD or not or something else?

Before it had a stage 1 flash for an 88 motor.

06 ultra, 203 cams, 95" screaming eagle 9.4:1 flat tops, supertrapp two into one

I had some heat on the front cylinder (275 degrees) according to the dyno guy, and he wouldn't tune it running that hot, he suspected to much cylinder pressure from a tight bore or something (talked to Kirby who bored it and he assured me the bore was correct). He wanted me to check cylinder pressure, squish, and if those proved ok get a reflash on the ecm. Was starting to check the cylinder pressure and the guy helping me wanted to hear the bike so we cranked it and as revving it up notice the front cylinder head gasket was blown. It was a SE 1550 big bore gasket (tri-metal). Just wondering if anyone has had problems like this.

 

n e one

 

Is the PC III map you're using aware of the previous flash done to the ecm? The PC III map might be for a stock ecm. Either way, a "good" dyno guy should be able to adapt.

 

Sounds like that tuner doesn't know what he's doing. That's why you tune an engine so that it doesn't run hot.
Also, that build is not a complicated high cylinder pressure build. So that answers that question.
Your engine builder should have told you what your squish would be based on the pistons that you have and the head gasket thickness. He should know this value within .005" without even measuring it.

As far as the head gasket blown, I would take it back to the guy that assembled your top end and tell him to fix it for free; unless it was something that you caused.

 

1. 275* is not hot for a cylinder.

2. Were you getting a dyno tune or reflash? For sure, the stage 1 (a/c and mufflers) on your 88 wasn't what you needed for a 95" with new cams. And a Stage II is what HD does with a 95" BB w/ SE 203 cams IIRC.

3. No reason for the head gasket blowing unless you put some significant miles on the 95" build running that Stage I 88 download. You were running lean (i.e hotter) with the 95" build without any adjustment to add fuel.

Carl

 

I was Getting a dyno tune and had put about 500 miles on it tryingto break it in to get a tune. Tuner was wondering if the new ECM flash was what I needed to make the pcIII work correctly. The tuner knew I had a stage one ECM flash for an 88.

Thanks for any advise

 

The map in the pcIII was for a 95" 203 cams pipe and stage one ECM flash.

 

sounds like you need a new tuner. Just becuz someone says they can tune, doesn't make it so.

 

the canned map will make the bike drivable so you can run it to get it tuned. Once the tuner has it, it should be custom tuned to your exact build. He can add or remove fuel, to get the exact fuel ratio's need for the best performance, thru out the entire range of operation. You should see a big difference in performance over a canned map.,

 

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