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Old 10-14-2012, 06:58 PM   #121
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Btw here are some screenshots from the beta instructions dynojet put out. If you dont scale it wont make the changes. Ve+ means changes are happening too fast.

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Old 10-30-2012, 11:37 AM   #122
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I just noticed after a firmware update that there is now an option for "quick tune" and you can finally adjust the idle. I lowered mine down 200rpm to give it a more harley-esc idle
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Old 10-30-2012, 01:51 PM   #123
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Lowering the idle is the quickest way to flatten the cam.

They put it at 1250 for a reason.
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Old 10-30-2012, 05:27 PM   #124
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Quote:
Originally Posted by rdscustoms View Post
Lowering the idle is the quickest way to flatten the cam.

They put it at 1250 for a reason.
Whats the reason? Does it lower the oil pressure causing the cam to wear more? If that's the case it would also wear out the journals on the crank too right?
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Old 10-30-2012, 06:23 PM   #125
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Quote:
Originally Posted by rdscustoms View Post
Lowering the idle is the quickest way to flatten the cam.

They put it at 1250 for a reason.
I dont have a oil pressure gauge but how much less pressure/volume could there possibly be? There could be 1000 different reasons why its 1250rpm, my guess would be that is where the cams seem to idle smoothly.

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Old 10-30-2012, 08:01 PM   #126
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Originally Posted by DOITLAYNSTYLE View Post
Whats the reason? Does it lower the oil pressure causing the cam to wear more? If that's the case it would also wear out the journals on the crank too right?

I'm not an engineer, I'm just going by what I was taught by mechanics and racers who came before me. But if you want to do your own research, I'd check into the topic of "hydrodynamic wedge principle."

A slower idle would decrease the wedge of oil being pushed in front of the surfaces that might come into contact during the rotation.
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Old 10-30-2012, 08:12 PM   #127
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I'm not an engineer, I'm just going by what I was taught by mechanics and racers who came before me. But if you want to do your own research, I'd check into the topic of "hydrodynamic wedge principle."

A slower idle would decrease the wedge of oil being pushed in front of the surfaces that might come into contact during the rotation.
Thanks for the info rds, I bumped it back up to normal idle.

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Old 10-30-2012, 08:15 PM   #128
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I dont have a oil pressure gauge but how much less pressure/volume could there possibly be? There could be 1000 different reasons why its 1250rpm, my guess would be that is where the cams seem to idle smoothly.

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I (do) have a mechanical oil pressure gauge. The motor is supposed to have between 43 and 94 psi of oil pressure when the oil is at 158 degrees operating temperature.

Your "idiot oil light" will come on when the pressure falls to 2 psi.

It's your bike, do what you want to it.
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Old 10-30-2012, 08:19 PM   #129
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Thanks for the info rds, I bumped it back up to normal idle.

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No problem.

I'm no genius, but I do listen to the people that know a few things. I'm getting old, I probably forgot all the important stuff and just cling to obscure bits of information that may or may not come up from time to time.
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Old 10-30-2012, 10:22 PM   #130
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No problem.

I'm no genius, but I do listen to the people that know a few things. I'm getting old, I probably forgot all the important stuff and just cling to obscure bits of information that may or may not come up from time to time.
That's good info man. Always good to learn from those that have learned the hard way.

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Old 10-31-2012, 12:57 AM   #131
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I do have an oil pressure gauge and you got at least 40 psi at idle. As for how much oil is needed between the cam and the bucket. With today's synthetic oils not much, you could probably run the motor a few hundred miles with no oil pressure with little or no ill effect. As to the real reason not to lower your idle, you'd be beating your rod bearings to a slow death. I can attest to both those last 2 statements.
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Old 11-25-2012, 03:25 PM   #132
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Yes its normal

I think i used scale when I saw that. Also not a bad idea to reset trims.

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So I've been messing around with my PV with the autotune in "Pro mode."

I got the the message about being out of range and if I wanted to "scale." The first couple of times I figured I'd just let it do some adjustments and then see if it came into range by it's self. Sort of like the old PCV autotune and accepting the trims until it didn't need to accept the trims anymore.

Couple of more times with this message and I just accepted the scale.

I went back and looked at the MAP via the computer and the PV software, I used the feature that overlays two different tunes and lets you compare one to the other in real time.

Anyway, when it "scales" it's actually changing the displacement of the engine to fit into the parameters of the tables.

My engine changed from 76 cubic inches to 82 cubic inches.

I'm currently being schooled by Dynojet via an email conversation because I have all kinds of stupid questions to ask.

I'm waiting for confirmation that the autotune kit is a "temporary item." Once you take your pre-configured map and flash it a few times to make all the adjustments, you disconnect everything and put the stock o2 senors back in.

If anyone is interested, I was told you can get certification training from Dynojet for $750. It's a three day class. It's obviously set up for someone working in a shop with a dyno, but I certainly wouldn't mind taking the class to really know what I was doing with fuel injection.
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Old 11-25-2012, 05:48 PM   #133
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Wow was your tune out of whack. That scale adjustment is close to 9%. Sounds like you have your closed loop bias way to lean. The actual cu in is 76.3 making it 82 is asking for a lot more fuel.
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Old 11-26-2012, 01:27 AM   #134
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Wow was your tune out of whack. That scale adjustment is close to 9%. Sounds like you have your closed loop bias way to lean. The actual cu in is 76.3 making it 82 is asking for a lot more fuel.
Preloaded tune for Rhinehart 2-1 and a K&N.

I sent the pre-loaded tune and the adjusted tune from the PV autotune in for review at Dynojet. I was told everything was normal. The autotune session was performed during and 80 degree day, not a cloud in the sky and around 300 ft above sea level.

The were a couple of cells coming in at 127.5.
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