Dyno run - Road Star Warrior Forum : Yamaha Star Warrior Forums

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Old 06-07-2012, 06:31 PM   #1 (permalink)
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Default Dyno run

Just got another dyno run done by a local Harley dealer(who was actually really nice about it) since my Yamaha dealer has had nothing but problems with their dyno over the past couple months. Numbers were 89hp/112torque. The butt dyno feels great but the numbers were a little lower from what I was expecting with the pr110 and stage 2 headwork done. It's running without a custom map so that may have something to do with it, but other than that it is what it is I guess
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Old 06-07-2012, 06:32 PM   #2 (permalink)
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What brand and model of dyno was it?
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Old 06-07-2012, 06:38 PM   #3 (permalink)
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Did they give you A/F ratios? Make sure she is getting enough fuel! Hate to see all that money go to waste cause she was running too lean!
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Old 06-07-2012, 06:40 PM   #4 (permalink)
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it was the dynojet winipep 7, looks like it was set to sae correction. i will attach the slip but he was unable to email to me so i took a picture of the print out. it looks like good enough quality to be read
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Old 06-08-2012, 11:14 AM   #5 (permalink)
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it was the dynojet winipep 7, looks like it was set to sae correction. i will attach the slip but he was unable to email to me so i took a picture of the print out. it looks like good enough quality to be read
You are running pretty lean. I run mine that way on purpose but if you want the most power you can get, that ratio needs to be around 13.5:1

Fatten it up some and I bet there is 8 more HP and probably a few more ft-lbs in there.
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Old 06-08-2012, 11:20 AM   #6 (permalink)
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Do you have a baseline to know the increase? It doesn't ping does it? That would not be good
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Old 06-08-2012, 01:42 PM   #7 (permalink)
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With your PR 110 did you also do cams or just the bore/pistons/headwork?
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Old 06-08-2012, 01:54 PM   #8 (permalink)
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With your PR 110 did you also do cams or just the bore/pistons/headwork?
I think pr talked him into just doing pistons in head work said that he would get more out of head work than just cams I find that very hard to believe.

Throw in a set of cams and I bet you see an increase of 10 hp and torque.
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Old 06-08-2012, 02:15 PM   #9 (permalink)
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I think pr talked him into just doing pistons in head work said that he would get more out of head work than just cams I find that very hard to believe.

Throw in a set of cams and I bet you see an increase of 10 hp and torque.
I believe you are correct. I pushed 104 hp with the PR 110, cam kit, and a good tune. Wont be doing the head work till next winter
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Old 06-08-2012, 02:23 PM   #10 (permalink)
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I think pr talked him into just doing pistons in head work said that he would get more out of head work than just cams I find that very hard to believe.

Throw in a set of cams and I bet you see an increase of 10 hp and torque.

Agreed. Do not see the point of the head work with no cams to take advantage of it. I have speed* pistons and cams and have not had it checked on dyno yet but would not be surpised if I am getting similar numbers with my stock heads and bore. Will post some numbers once I have them. Also the cams give you more RPM range if you have a speed* edu or dyno jet ignition module to go with them.
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