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Author Topic: Dyno tuning  (Read 4007 times)

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gordy

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Re: Dyno tuning
« Reply #15 on: June 12, 2009, 11:13:59 PM »

Had nothing but bad luck with HD dealer installing the Super tuner, so I made an appointment with Jarz Performance, Abbotsford BC.  They did a baserun 83.6hp/105trq and then started addressing my issues of popping, throttle lag, running hot, backfire on shutdown, hard starting etc.  5 hours later,  I got the nicest running SERG ever, 94hp 110 trq 
Lee, Murray and his tuner were great. 
Glad I got my head out of my butt and gave them a chance.
Thanks Geezer for your input.
Funny how OEM dealer said all these issues were "normal" for a 110. :-\
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Unbalanced

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Re: Dyno tuning
« Reply #16 on: June 13, 2009, 07:42:51 PM »

Grats Gordy,

I bet the curve looks great and I bet it runs a whole lot better.   Any dynosheets to post to see the curve?   How is your fuel mileage with the updated tune?   Damn I should of bet on the read out hehe.

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sportygordy

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Re: Dyno tuning
« Reply #17 on: June 13, 2009, 08:27:07 PM »

Hey Gordy,,

keep your SERT an try this out

http://www.tunemyharley.com/
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HD Street Performance

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Re: Dyno tuning
« Reply #18 on: June 14, 2009, 09:30:14 AM »

Dyno should show you 86 - 90 hp and 108 to 110 torque happier dynos the numbers go up from there.

The dealer should be able to show you step tests to get flat lines from 2 - 30 percent throttle and sweep tests from 40 to 100 percent throttle for each cylinder as well as first pull ... to be compared to a last pull wide open throttle for final approval for overall gains.  You should get a 4th and a 5th gear pull in SAE with some smoothing and forced scale if it is a dyno jet.

If they can't show you reasonable flat runs from each cylinder tuning the VE's they haven't taken the time.   You should also compare the final map with the starting map looking at what timing changes were made and hopefully they should be all over the map and not just 90/100 percent throttle as well as what they are setting the closed loop bias tables to for your cruising area.

Hope you found a decent tuner at the dealer your looking at.  You should check out Doc1's post on questions to ask a dealer before getting them to tune your bike.

http://www.cvoharley.com/smf/index.php?topic=25159.msg406911#msg406911



So there is much good info here but really why tune it now, assuming it has no running maladies and a cam change is in your future? It will need to be tuned then again. I would just wait.
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