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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1  
Old 17th February 2020
Ztomasc Ztomasc is offline
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Default Ve tables for iron 883 with 1250 conversion

I’ve got a 19 883 with straight pipes and a hammer performance 1250 kit stock heads and stock air cleaner. Just curious if anyone has the same set up with a screenshot of their ve tables so I can get the ve tables dialed in more for an easier time auto tuning.


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  #2  
Old 18th February 2020
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hexnut hexnut is offline
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Using power vision in auto tune is what adjust the VE tables. Hammer will send you the revised tune for your 1250 build.
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2014 Sportster Superlow, Hammer 1250, smash head work, 560 cams, S&S rockers and lifters. ported throttle body and intake,
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Old 18th February 2020
Bikeaholic Bikeaholic is offline
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Yes. What the others have said.

I do understand your question. However, even if someone has already auto-tuned to similar modifications as your bike and you copied their VE tables prior to your auto-tuning, it would possibly make little difference.
Hammer may already have a VE ballpark figure for your mods to send too you.

Ride Safe.
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Old 18th February 2020
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Hopefully you had Hammer send you a tune before you started your 1250 build.

I'm sure they change the Engine Displacement to about 77.6 cu in for a 1250.
I know they also have ignition timing tables specific to their kits.

From the Hammer Instructions- http://www.hammerperf.com/ttinstallkit.shtml#Tuning

If you're using a Dynojet Powervision we will provide you with a starting point map. Please contact us before you even start your motor.
We very much prefer to modify your stock map as opposed to basing your new tune on a canned map. The reason is that there are numerous parameters
in the tune that we don't want touched, and canned maps often have changes in those areas. So email a copy of your original tune to us.
To retrieve the original tune using your Powervision, (connected to the bike)
go to Program Vehicle [accept], Load Tune, Load Copy, Load Copy of Original.
It will let you put a copy of the original tune into one of the slots.
Then pull that tune over to the PC using the USB cable and WinPV, save it as a .pvt file, and email it.
We'll make the needed changes and send it back to you.
Do not send us the .stk file that the software creates as a backup of your original tune, this does nothing for us.
Please retrieve the original tune and save as a .pvt as described.
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Old 18th February 2020
Ztomasc Ztomasc is offline
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I’m using an fp3 that’s why hammer wasn’t able to send me over a full tune. They did send me the spark advance and afr tables to program which I have already got those implemented. I spoke to hammer yesterday and let them know that I had run 3 autotunes to adjust my ve tables but was still having a hesitation. They told me to go in and manually adjust the ve tables to match the surrounding cells in the ve tables which I did and the hesitation is almost gone so all is going well. Thank you guys for your input your help is much appreciated.


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Old 19th February 2020
Bikeaholic Bikeaholic is offline
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Sounds like a good outcome. Enjoy the upgrades and ride safe.
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