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CVO Technical => Intake/Exhaust/ECM => Topic started by: longlast on October 23, 2018, 02:19:57 PM
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Had it's first dyno run today. The dyno guy thinks there's a fuel issue going on or there's a issue with the V&H fuelpak. "He's not fond Fuelpak "
What do you experienced dyno chart readers make of the chart.
The guy wasn't to forth coming on explaining the chart. I noticed he was also cracking the throttle then hitting the kill switch off then on again straight away "Don't know why"
He said to disconnect the Fuelpak and take it for a run to see if it runs any better , didn't think it would run without the Fuelpak.
For me I find it runs good it has lots of get up and go when I crack it. It doesn't cough spit or sputter at any point there's also no hesitation "example " 6th gear 70mph crack the throttle it picks up speed gradually for thr first little bit, but drop it into 5th and stand on it then it'll pull straight away to a 100mph no hesitation.
On the chart top left corner, what does the RunFile 004,3and 2 drf stand for?
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I don't have any problem with it whatsoever. You say it runs perfect. What's the problem?
Runfile is just the software stamp for a given run.
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Had it's first dyno run today. The dyno guy thinks there's a fuel issue going on or there's a issue with the V&H fuelpak. "He's not fond Fuelpak "
What do you experienced dyno chart readers make of the chart.
The guy wasn't to forth coming on explaining the chart. I noticed he was also cracking the throttle then hitting the kill switch off then on again straight away "Don't know why"
He said to disconnect the Fuelpak and take it for a run to see if it runs any better , didn't think it would run without the Fuelpak.
For me I find it runs good it has lots of get up and go when I crack it. It doesn't cough spit or sputter at any point there's also no hesitation "example " 6th gear 70mph crack the throttle it picks up speed gradually for thr first little bit, but drop it into 5th and stand on it then it'll pull straight away to a 100mph no hesitation.
On the chart top left corner, what does the RunFile 004,3and 2 drf stand for?
If'n you are happy with everything, ride the sum beach, Pete, and forget it. No cough, spit or sputter is a good thing at our age.... ;D
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Sounds like you got a real winner for a "dyno tuner". Are there any real professionals near you, or is this what you're stuck with?
The air-fuel ratio part of the chart indicates an extremely lean mixture below 2500 rpm. If that's accurate, you could see a significant improvement in off-idle performance and smoothness by getting that corrected.
JMHO - Jerry
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Sounds like you got a real winner for a "dyno tuner". Are there any real professionals near you, or is this what you're stuck with?
The air-fuel ratio part of the chart indicates an extremely lean mixture below 2500 rpm. If that's accurate, you could see a significant improvement in off-idle performance and smoothness by getting that corrected.
JMHO - Jerry
I knew it was lean, I did up the value on the fuelpak air fuel from 0 to +5 by doing so it was hard to start when cold. It would run for 4/5 sec. then die out then crank crank crank had to crack the throttle to start it again but was hunting like crasy. I put the value back to "0" it starts first time and has a smooth idle.
There's one other dyno tuner near by
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If'n you are happy with everything, ride the sum beach, Pete, and forget it. No cough, spit or sputter is a good thing at our age.... ;D
Hahaha! Yeah I admit I get the cough, spit and sputter ;D
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Sounds like the issues one would expect when you're forced to tune on the left side of dino. If it ain't broke don't fix it Pete. Runs and feels good, fuel mileage is what you expect, pipes look normal, makes you happy; just go for it. Nothing in your chart that screams, "spend more money now!"
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Thanks guys, you think the chart looks good then I'm good with that. If it wants to run a bit lean at the bottom end I think I can live with that. I don't believe it's overly lean because of the header pipes are not discolored and the silencers have that little bit of black dry sooty powder to them.
And your right Don,...if it ain't broke don't try to fix it.
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Probably started the recording from a rolling start, coming off speed with throttle closed. That would explain the start of the graph a:f curves. As long as it's not popping off idle when accelerating or when decelerating then don't screw with it. Those curves are very good. All exhaust systems will get a little sooty.
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Sounds like the issues one would expect when you're forced to tune driveon the left side of dino. If it ain't broke don't fix it Pete. Runs and feels good, fuel mileage is what you expect, pipes look normal, makes you happy; just go for it. Nothing in your chart that screams, "spend more money now!"
Lol. Subtle, very subtle. Fixed that to pull the other leg (longlast, that's like taking the piss. Cheers, mate).
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Did you pay for a tune, or a set of baseline pulls?
I'd ask him to reprint a copy of the sheet in SAE correction factor, showing torque on left and power on right, with AFR on the bottom. Ask him which cylinder he sampled.
If you want that corrected, a FP isn't going to get you there easily.
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just go for it. Nothing in your chart that screams, "spend more money now!"
.............. :2vrolijk_09: