How Much Dyno Time is Required? - Road Glide Forums
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post #1 of 10 (permalink) Old 08-30-2011, 12:30 PM Thread Starter
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How Much Dyno Time is Required?

Just got a 2012 FLTRXSE and want to change just the headers and mufflers. Purchasing the SERT (at the advice of the techs at local stealer) and was told the dyno time for this would be about 5 hours...

5 hours to set performance on one bike with a new exhaust? Does that seem high to anyone other than me? It's not like we're re-writing the compuetr program on the bike nor are we adding head work and a cam... yet, just exhaust (V&H Dresser Duals w/Widow Slip-ons). This cant take more than 1-2 hours max, can it?

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post #2 of 10 (permalink) Old 08-30-2011, 12:47 PM
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Sounds ridiculus.
Shouldnt have to buy a tuner either for exhaust.
My buddy has a 2011 CVO RGU, and he put Rinehart full exhaust on, still uses the o2 sensors, doesnt have a tuner, and has not had it Dyno'd. He is consistently getting 42-45 MPG and the bike runs great. He has 16,000 miles on it since April, and has had no problems.
I think normal Dyno time is about 3 hours for a good tune.

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post #3 of 10 (permalink) Old 08-30-2011, 12:59 PM Thread Starter
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Thats what I thought too on the time. I plan to upgrade over winter to a new CAM and having heads decked/ported and polished so I figured I'll need SERT at some point, might as well get it now. 5 hours for dyno of just an exhaust change is just raping people... Calling my mechanic and asking him what he thinks about doing exhaust as you suggested. I bet they'll say it voids the warranty...

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post #4 of 10 (permalink) Old 08-30-2011, 01:18 PM
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Id find a different dealer. My buddy has all his work done at the dealership and this is probably his 10th SE/CVO bike and the best one yet.

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post #5 of 10 (permalink) Old 08-31-2011, 01:04 PM Thread Starter
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I called my mech. and he agreed with us... 2 hours for just an exhaust change, if that and said don't ask the parts guys anything about service stuff cuz they don't know what they're talking about on anything other than parts.

I trust this guy as he has done two previous builds from 88's to 95's and P&P heads and everything for both (2003 FatBoy and 2006 StreetGlide) and they both run great!

Exhaust to ship today so I should have it on in about 2 weeks. Will let you know ho things turn out.

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post #6 of 10 (permalink) Old 08-31-2011, 01:54 PM
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Find an indy who is more interested in tuning a masterpiece than soaking you for hours. Ask around here or on other twin cam forums for one in your area and you'll find good recommendations.



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post #7 of 10 (permalink) Old 08-31-2011, 03:04 PM
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You don't need to dyno the bike if you just change the exhaust system. I have SERT and it is serving me well it is very trouble free. If you are going to do other upgrades you will need a tuner of some kind. A good DYNO will take about 5 hours because the tech will bring the engine up to high RPM's many times and the engine will heat up so the tech also has to let the bike COOL down to prevent damage to the engine. On A CUSTOM DYNO (which you don't need right now) the tech will turn off the rear cylinder and tune the front cylinder in 500 RPM intervals from 1500 rpm's to 6500 rpm's when he is done with the front cylinder the tech will turn off the front cylinder and turn on the rear cylinder and repeat the tune process at the same rpm's intervals as the front. The tech may have to repeat this procedure many times until the bike is perfectly tuned.


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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.
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post #8 of 10 (permalink) Old 08-31-2011, 04:08 PM
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For exhaust, AC and tuner, my dealer charges 3 hours of dyno time.

2010 Road Glide Custom FLTRX Scarlet Red - SE Stage 1 AC, Carriage Works Tornado Slip-on, SE SuperTuner, Jagg Fan Assisted Oil Cooler, 12" Windvest, HD Chrome Saddlebag Guards, Arc Audio MPAK 6
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post #9 of 10 (permalink) Old 08-31-2011, 04:23 PM
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well if your tuner really is a perfectionist and you want your bike to run 100% of its abilities even just adding a/c and pipes he is in the ball park. People don't realize it takes just as much to tune a basically stock bike as it does to tune a built one. Most don't take the time to tune but guys that do and have a really good tuner think it is money well spent. There are people who tune 100% stock bikes just getting a sert and no other mods and see a nice rideabiltiy imporvement.
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post #10 of 10 (permalink) Old 09-14-2011, 08:54 AM
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If you have SE Pro Super Tuner, it has Smart Tune feature. Just follow the Smart Tune directions and should get your VE tables close.

2009 RG - V&H V02 intake, V&H Dresser Duals, V&H Blackout Rounds, SEPST

2002 1200 Custom - V&H short shots, SE AC, rejet
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