105/118 wtf ???????? - Road Glide Forums
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post #1 of 21 (permalink) Old 02-14-2015, 07:23 PM Thread Starter
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105/118 wtf ????????

So today I finally took my bike in to get it Dyno tuned. I installed the woods tw555 cams,V&H pro pipe black with baffle plug removed and SE heavy breather. My current tuner is a power vision. I used a base map from fuel moto and did the auto tune basic for awhile. It always ran strong, but I didn't notice any difference in the auto tune basic. So I decided to take it in to a well known tuner in Hayward , California. Bob from RC cycles. I seen numerous Dyno sheets with my similar build and expected low 90's hp and 110 tq give or take, but 105hp and 118tq on a stock 103 heavy breather, pro pipe and tw555 cams. What am I missing, I mean Iam more than satisfied just don't understand, even the pre numbers are high 90's. After he was done and took it for a spin it feels like I got 10 more hp and tq, smooth as butter. I was there watching the whole time around 3hrs, what a day. Thank you Bob
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post #2 of 21 (permalink) Old 02-14-2015, 07:28 PM
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I aint saying he is playing with the dyno , but 100 HP with a stock 103 is pushing the limits of my imagination .. Never put much faith in dyno numbers ..

JtB

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post #3 of 21 (permalink) Old 02-14-2015, 07:29 PM
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Good numbers.

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post #4 of 21 (permalink) Old 02-14-2015, 07:33 PM Thread Starter
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I'm trying to figure out how to upload the a pic of the sheet
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post #5 of 21 (permalink) Old 02-14-2015, 08:49 PM Thread Starter
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post #6 of 21 (permalink) Old 02-14-2015, 09:57 PM
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I aint saying he is playing with the dyno , but 100 HP with a stock 103 is pushing the limits of my imagination .. Never put much faith in dyno numbers ..

JtB
not quite stock, he did have cams installed.

some dyno's are 'happier' than others and can read a little high, so that could be part of it. but the important thing is that you're happy with the way it runs.

my fm 107 with the same cams got 98/124.....

I understand the concept of reality, but find it too confining for a way of life.

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post #7 of 21 (permalink) Old 02-15-2015, 08:31 AM
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Its very difficult to see, but one thing I can see is that he used STD correction factor.

If he had used the more accurate and comparable SAE correction factor, your numbers would have been about 5% lower, give or take.

It really bugs me when tuners do this because one of 2 things is happening:

1) they are knowingly deceiving their customers because they count on most people not knowing the differenc (bad)

Or...

2) they themselves dont know the difference (also bad)

Even if you take this into consideration the number still seem optimistically high, but if you have the cash to pay for another run at a different shop, I'd do that. And make sure they use SAE correction factor.

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post #8 of 21 (permalink) Old 02-15-2015, 10:07 AM
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I'm impressed that he smoothed out the power curve, it was to wavy on the early pull and he also moved your peak tq noticeably to the left. These are the things you pay a person to do that computers just dont quite get and would be a big part of the difference your feeling. Enjoy it

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post #9 of 21 (permalink) Old 02-15-2015, 12:51 PM Thread Starter
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Thanks for the feed back. What does a tuner have to gain by fudging the numbers and that extreme? All I know is I feel a huge difference in performance. It's like the feeling when you ride a 103 with stock cams and then ride one after your cam install. That's the same feeling I'm getting.
Can I post a short video? If so how
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post #10 of 21 (permalink) Old 02-15-2015, 03:20 PM
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Originally Posted by Livindadream View Post
Thanks for the feed back. What does a tuner have to gain by fudging the numbers and that extreme? All I know is I feel a huge difference in performance. It's like the feeling when you ride a 103 with stock cams and then ride one after your cam install. That's the same feeling I'm getting.
Can I post a short video? If so how
Post it to Youtube then post a link here.

Again, its either willful deception or not knowing. Neither is good in my opinion.

But everyone compares charts, and most people dont know the difference, and most tuners want you to think they're great at getting every pony out of your bike.

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