My vote is to get av8er up and running and confident with his sled.
Then we can help him with the advanced tuning.
Then we can help him with the advanced tuning.
New to afr gauge- need #'s for twisted Extreme
- Thread starter av8er
- Start date
Jensen, I agree with you 100%. This is why I would like to give him my numbers tomorrow, as well as explain the process from start to finish
on how to tune his sled.
on how to tune his sled.
J
jensen
Member
If his fuel pressure is too low then that will not be too high. And if he runs too long at wfo then he will burn down
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My old turbo had EGT's this one only has AFR
I haven't touched fuel pressure, running straight avgas at 8.5-9 lbs of boost, not sure gauge is hard to read, and I'm usually trying not to run into anything under that kind of boost, with blue green sled ran ok, was showing about 12.2-3 at WOT, but was running poor coming down the hill, I did not turn off sled and let Box recalibrate which Shain recommended yesterday on the phone, Do not want to burn this thing down. on the trail going up the Mtn . I saw 16, 17 and all dashed lines which is bad, very bad
I haven't touched fuel pressure, running straight avgas at 8.5-9 lbs of boost, not sure gauge is hard to read, and I'm usually trying not to run into anything under that kind of boost, with blue green sled ran ok, was showing about 12.2-3 at WOT, but was running poor coming down the hill, I did not turn off sled and let Box recalibrate which Shain recommended yesterday on the phone, Do not want to burn this thing down. on the trail going up the Mtn . I saw 16, 17 and all dashed lines which is bad, very bad
K
knzee
Well-known member
Av8er. long post a coming.
Av8er,
My numbers are.
G-1.5
Y-1.5
R-.5
G/B-4.5 @ 9lbs 10,500 to 12,500'
R/B-7.5
At your altitude I would run 9lbs max on 100ll
This info is based on the fact that you already know for sure your sled is
set at 8.5 to 9 lbs of boost. When you are done tuning this weekend it will either be 8.5 OR 9lbs.
So, you are going to tune your sled to the existing boost setting by
finding a hill that you can make a 5 second pull on with no distractions,
such as trees and rocks.
1. Make sure fuel pressure is set at EXACTLY 40 psi at idle.
2. Make a short pull to make sure fuel pressure is rising as sled is
coming up on boost. Should be 1 to 1.
40 psi at idle 9lbs boost. 40psi plus 9lbs=49 psi at full boost.
3. Make a wot pull looking at A/F gauge only. Tune sled from
11.8 to 12.2 A/F reading. My box gives .04 to .05 up or down, on the A/F gauge per 1/2 point of fuel added or taken away.
4. Make a WOT pull looking at boost gauge, making sure you are going to full boost. Remember we only tune to WOT, and full boost on G/B.
Make small adjustments. If you are raising or lowering boost do so at 1/4
turn at a time on controller so you are not guessing on fuel. All of the cats
seem to have the hot spot a mid to 3/4 throttle. make sure you vary throttle
thru this range on trail. honestly the only time I ever pay attention to my A/F
gauge is when I am boosting, and the occasional look down to make sure it is still working.
Once you have the G/B number for the area you are riding it should not change as long as fuel pressure doesn't change.
I would start with the G/B at 4.5 to be safe. 4.5 should be rich. Technically you should be in the 3.5-4 range. The numbers do not vary that much.
Mine are:
G/B-10,500 to 12,500=4.5
G/B-9,750 to 10,500=4.0
G/B-9,000 to 9,750=3.5
So, 1 point of fuel in 3500' feet of elevation. These numbers have never
changed since day one.
Take your time, small moves, and you wil get it figured out. If I missed something give a shout out. Been a 18 hour day.
Hope this helps;
John
once you get your sled tuned to the boost you are set at now, it is super simple to move boost around.
Get this method figured out and we will move to tuning with boost controller.
One more Thing, You are tuning with G/B only. If this method does not work I
would get sled back home safely and start looking for other issues.
My numbers are.
G-1.5
Y-1.5
R-.5
G/B-4.5 @ 9lbs 10,500 to 12,500'
R/B-7.5
At your altitude I would run 9lbs max on 100ll
This info is based on the fact that you already know for sure your sled is
set at 8.5 to 9 lbs of boost. When you are done tuning this weekend it will either be 8.5 OR 9lbs.
So, you are going to tune your sled to the existing boost setting by
finding a hill that you can make a 5 second pull on with no distractions,
such as trees and rocks.
1. Make sure fuel pressure is set at EXACTLY 40 psi at idle.
2. Make a short pull to make sure fuel pressure is rising as sled is
coming up on boost. Should be 1 to 1.
40 psi at idle 9lbs boost. 40psi plus 9lbs=49 psi at full boost.
3. Make a wot pull looking at A/F gauge only. Tune sled from
11.8 to 12.2 A/F reading. My box gives .04 to .05 up or down, on the A/F gauge per 1/2 point of fuel added or taken away.
4. Make a WOT pull looking at boost gauge, making sure you are going to full boost. Remember we only tune to WOT, and full boost on G/B.
Make small adjustments. If you are raising or lowering boost do so at 1/4
turn at a time on controller so you are not guessing on fuel. All of the cats
seem to have the hot spot a mid to 3/4 throttle. make sure you vary throttle
thru this range on trail. honestly the only time I ever pay attention to my A/F
gauge is when I am boosting, and the occasional look down to make sure it is still working.
Once you have the G/B number for the area you are riding it should not change as long as fuel pressure doesn't change.
I would start with the G/B at 4.5 to be safe. 4.5 should be rich. Technically you should be in the 3.5-4 range. The numbers do not vary that much.
Mine are:
G/B-10,500 to 12,500=4.5
G/B-9,750 to 10,500=4.0
G/B-9,000 to 9,750=3.5
So, 1 point of fuel in 3500' feet of elevation. These numbers have never
changed since day one.
Take your time, small moves, and you wil get it figured out. If I missed something give a shout out. Been a 18 hour day.
Hope this helps;
John
once you get your sled tuned to the boost you are set at now, it is super simple to move boost around.
Get this method figured out and we will move to tuning with boost controller.
One more Thing, You are tuning with G/B only. If this method does not work I
would get sled back home safely and start looking for other issues.
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FYI, I tried other setting in the Y setting and 1.5 was the only setting in the Y that seemed to work, if I raise it to 2 it bogged bad, down to 1 it wasn't bad but not as good.
It will never run great down the trail unless wot, If it start running rich let completely off the throttle, what happens is it builds boost and starts running off the boost fuel and runs rich, you can look at your box and see if the G/B is on and that will tell you. I had to let off the throttle completely (almost push it shut) to get it out of the G/B and it would clear up instantly.
Running 100% av gas is to much and going to screw with the sensor, I was running 4gal or less a tank with 91 @ 8-10lbs, and it ran way better (more snap) If by chance its not enough octane the det sensor will let you know ( it will feel like it bogs in the mid range) if it does you just turn it down a touch.
BTW, huge gains with MDS weight and this turbo kit.
and massive control with a kmod.
Do you ever ride down this way.
It will never run great down the trail unless wot, If it start running rich let completely off the throttle, what happens is it builds boost and starts running off the boost fuel and runs rich, you can look at your box and see if the G/B is on and that will tell you. I had to let off the throttle completely (almost push it shut) to get it out of the G/B and it would clear up instantly.
Running 100% av gas is to much and going to screw with the sensor, I was running 4gal or less a tank with 91 @ 8-10lbs, and it ran way better (more snap) If by chance its not enough octane the det sensor will let you know ( it will feel like it bogs in the mid range) if it does you just turn it down a touch.
BTW, huge gains with MDS weight and this turbo kit.
and massive control with a kmod.
Do you ever ride down this way.
S
sweperformance
Member
My sled goes over the lean afr limit on midrange, low load, regardless of adjustment om the attitude box. Do you have the same on your sleds??
Yes, mine does. Right or wrong I only pay attention to my A/F at full boost
only. My sled gets run very hard and absolutely zero issues. That is how shain has the box set up and that is how I run it no changes.
only. My sled gets run very hard and absolutely zero issues. That is how shain has the box set up and that is how I run it no changes.
K
knzee
Well-known member
Yes.
I hope it goes well for ya.
One more thing. I have never ran anything in my sled but Boost Juice at 3oz.
per gallon of non ethanol 91. I personally love the stuff. Was going to try 112
, but got screwed on purchase.
One more thing. I have never ran anything in my sled but Boost Juice at 3oz.
per gallon of non ethanol 91. I personally love the stuff. Was going to try 112
, but got screwed on purchase.
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on my twisted m1 attitude box it has a yellow or amber color with blue setting, I now understand the rest of the settings but not this one? Whats your guys' info on this?
av8er, how did it go for ya.
The yellow/blue mode controls how fast the yellow mode kicks in. We
do not have that mode on our m8 sleds. To go any further you should call shain.
do not have that mode on our m8 sleds. To go any further you should call shain.
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