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post #1 of 22 (permalink) Old 02-25-2012, 02:56 PM Thread Starter
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Dyno Disappointment

I finally got a dyno pass on my bike today to have a set of baseline numbers.

Way back at 5,000 miles, when it was still an 88" stock motor, I had it dynoed after the SERT, slip ons and and Stage 1 install and got 71HP and 78 ft/lbs on TQ.

I did the 95" build probably 5K ago (I have 52,500 miles on the clock now.) My engine specs are in my sig line. While I'm not disappointed in the TQ numbers, I am with the HP numbers. How did I lose 2 HP and gain 10 ft/lbs. TQ at the same time? Something's not right.

The service manager at the HD shop didn't think it was a big deal. He didn't think a proper dyno tune would give me much more than what I already had. In other words, he was suggesting I save the money on the tune, as long as the TQ numbers were the way they were.

I researched this build for a while before I decided on cam and piston combo, and I swore some of the articles I read said to expect 85-90 HP and 90-100 HP. I'm close on TQ, but way off on HP.

Should I go ahead and have it professionally tuned? Do you think I'd be able to get up towards 80HP through the SERT? Around town, the bike runs fine, and has plenty of throttle response for passing.

Opinions, please!


'04 FLTRI, originally Smokey Gold, now Vivid Black, 95", S/E forged high comp 9.6:1 pistons, Andrews 37G cams, Big Boyz heads, S/E adjustable pushrods, S/E Race Tuner, S/E Stage 1 kit, V&H Dresser Duals, S/E slip ons, H-D premium oil cooler, chromed wagon wheels, Brembo/H-D front brakes, added rear engine guards, Paul Yaffe 10" OEM Monkey Bars, detachable tour pak


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post #2 of 22 (permalink) Old 02-25-2012, 02:58 PM
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That sounds really low for a 95" build. Id be interested in what Frank Drago has to say, or Scott from Hillside.






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post #3 of 22 (permalink) Old 02-25-2012, 03:25 PM
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that looks low for having headwork done too.
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post #4 of 22 (permalink) Old 02-25-2012, 03:31 PM Thread Starter
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The heads are ported, polished and decked @ .020. Stock valves. Big Boys told me with with the head work and pistons, I should have an effective compression ratio of @ 9.8:1.

I guess I just need to get a proper dyno tuning. I need to make a road trip to Clermont, FL and see Doc. He's the closest reputable dyno tuner to me.

'04 FLTRI, originally Smokey Gold, now Vivid Black, 95", S/E forged high comp 9.6:1 pistons, Andrews 37G cams, Big Boyz heads, S/E adjustable pushrods, S/E Race Tuner, S/E Stage 1 kit, V&H Dresser Duals, S/E slip ons, H-D premium oil cooler, chromed wagon wheels, Brembo/H-D front brakes, added rear engine guards, Paul Yaffe 10" OEM Monkey Bars, detachable tour pak


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post #5 of 22 (permalink) Old 02-25-2012, 03:40 PM
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What does the AFR trace look like? What gear was the pull done in? Wouldn't hurt to check the CCP, and see if it's near the predicted value, as perhaps the compression is on the low side? Seems like that combo should make more power. Also, seems like SAE correction is generally used. Looks like yours is uncorrected.

Jeff

2009 Vivid Black FLTR/120R/Dewey's headwork/TMan 625G/Fuel Moto XXX 2/1/2 w/4" mufflers/HPI 55

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post #6 of 22 (permalink) Old 02-25-2012, 04:16 PM Thread Starter
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Jeff, this was a one time courtesy pass (it was Dyno Day at the dealership.) I'd have to make an appointment to have a proper dyno tune with the full hook ups. Service manager gave me a ballpark price but advised me to put it off. I'd feel more comfortable with someone who dyno tunes all the time versus someone who doesn't. If I have to shell out the cabbage, I want to get my money's worth. Know what I mean?

'04 FLTRI, originally Smokey Gold, now Vivid Black, 95", S/E forged high comp 9.6:1 pistons, Andrews 37G cams, Big Boyz heads, S/E adjustable pushrods, S/E Race Tuner, S/E Stage 1 kit, V&H Dresser Duals, S/E slip ons, H-D premium oil cooler, chromed wagon wheels, Brembo/H-D front brakes, added rear engine guards, Paul Yaffe 10" OEM Monkey Bars, detachable tour pak


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post #7 of 22 (permalink) Old 02-25-2012, 04:44 PM
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Is it the same Dyno that you got your first numbers from? I agree with you, I don't think I'd be a happy camper with 7 more CIs, and only 10 more TQ and 2 less HP, something seems strange, did you change cams.

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post #8 of 22 (permalink) Old 02-25-2012, 04:58 PM
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Quote:
Originally Posted by BigDaveOnBass View Post
Jeff, this was a one time courtesy pass (it was Dyno Day at the dealership.) I'd have to make an appointment to have a proper dyno tune with the full hook ups. Service manager gave me a ballpark price but advised me to put it off. I'd feel more comfortable with someone who dyno tunes all the time versus someone who doesn't. If I have to shell out the cabbage, I want to get my money's worth. Know what I mean?
If this is a run with a canned map on your SERT, then i think you will see a big improvement once you get a reputable dyno tune. Keep in mind, I dont know what i am talking about when it comes to this stuff! I have just read enough to know that a canned map is usually only good enough to keep you from hurting your engine.
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post #9 of 22 (permalink) Old 02-25-2012, 05:02 PM
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Quote:
Originally Posted by BigDaveOnBass View Post
Jeff, this was a one time courtesy pass (it was Dyno Day at the dealership.) I'd have to make an appointment to have a proper dyno tune with the full hook ups. Service manager gave me a ballpark price but advised me to put it off. I'd feel more comfortable with someone who dyno tunes all the time versus someone who doesn't. If I have to shell out the cabbage, I want to get my money's worth. Know what I mean?
Understand completely. Given Doc's reputation, and him being pretty close by, it would probably be worth the trip to pay him a visit.

Jeff

2009 Vivid Black FLTR/120R/Dewey's headwork/TMan 625G/Fuel Moto XXX 2/1/2 w/4" mufflers/HPI 55
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post #10 of 22 (permalink) Old 02-26-2012, 09:40 AM
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There is a guy at Tilley HD in Salisbury, NC. From what I have been told, he is the best tuner in our area and is a certified TTS Mastertune technician. I can't remember his name but he is from WV and I'm almost positive his name was on Doc's web-site as a graduate but I just looked and couldn't find Doc's list of graduates. The good thing is, unlike Doc who will only use TTS, he does both TTS and SERT and is not all the way down in Florida. He is thorough and does not rush through the tune. I have not talked to him but have talked to the service manager and he told me to plan on an over-night stay. I don't recall the exact cost but it seams to me it was around $350. I'm planning to take my bike down sometime this spring and thought you might want to check him out. Tilley's has two locations and he is at the Salisbury one.

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http://www.tilleyhdofsalisbury.com

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Last edited by Radioactive; 02-26-2012 at 09:46 AM.
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