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Old 12-07-2012, 03:34 PM   #1 (permalink)
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Exhaust mapping

I have an 09 ultra. I upgraded exhaust and intake with V&H oval slip on pipes and Dak intake. I had the system mapped and dyno tested by the dealer. I'm thinking of changing out the pipes to V&H fishtail slip ons. Does any body know if re-mapping is necessary?
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Old 12-07-2012, 09:00 PM   #2 (permalink)
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Call V&H.
Their legal department will probably say to remap just to CYA.
Maybe not.
I would think its the catalyst that determines a remap after the mufflers have been changed.
So if that is the same I wouldn't bother.
Of course the dealer will say its mandatory.

One slip on to the next cant be that big of a deal.
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Old 12-07-2012, 09:38 PM   #3 (permalink)
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You'll be good without remap. Might even run better with fishtails. The EFI will handle any minor change.

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Old 12-08-2012, 08:50 AM   #4 (permalink)
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Quote:
Originally Posted by Duke22 View Post
I have an 09 ultra. I upgraded exhaust and intake with V&H oval slip on pipes and Dak intake. I had the system mapped and dyno tested by the dealer. I'm thinking of changing out the pipes to V&H fishtail slip ons. Does any body know if re-mapping is necessary?
If adjustments were made to fuel when the ovals were installed, I would think no additional adjustment for the fish tails would be necessary. Having said that, I wonder what "mapped and dyno tested by the dealer" means? If a canned map was down loaded they are notoriously lean. However if a flash tuner like a Pro Tuner was used and a map was created with richer values, then that is another issue. Need more info to answer definitively. Oh yeah...an 09 header has no cat so that is not an issue as in the 2010's and newer.
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Old 12-08-2012, 08:57 AM   #5 (permalink)
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The mapping was not dine with a flash tuner. I don't recall which tuner I bought when I did the oval slip ons. I had the dealer perform all the work. If I do the fishtails I'd like to do it my self.
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Old 12-08-2012, 11:04 AM   #6 (permalink)
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The general differences between the one set of slip-ons and another isn't do drastic that a remapping is necessary. Perhaps on a Dyno, you may see a dip in the AFR at some point, but nothing I'd lose sleep over. You're maintaining the same headpipes and simply changed the muffers. If both are baffled, I'd just ride it. Take a peep at the plug color in about 100 miles.
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