I have a 2007 M8 BD RGT with the new ADA updates. When I first start the sled with fresh plugs it will start up and idle fine. It will take throttle and run decent for the first 2-3 miles. After that it seems to fall on its face. Feels like its loading up. My Boondocker box will show that I have charge tube temps of 255 ( I know this is the max setting) but when I reset it, it then goes back to 65 or so and then the minute I give it throttle its right back up to 255. I would assume this is why my sled won't idle and dies because the computer thinks it hot and adds more fuel but I don't know for sure. I need some help!!!!!!
M8 RGT bog issues
- Thread starter boondocker800
- Start date
Air temp sensor is bad. Get a new one or put a resistor in it and do away with it altogether. This will also aid in the consistancy of your sled. PM me if you need more info.
Thats not it. My BD box tests fine, ADA sensor tests fine so now I am checking all wiring connections between box and connections. So far I am finding that the white connectors on the BD application have been bent or are worn out. Looking at replacing all connectors unless anyone has a better idea???
At least 10 or 15 times, my BD box said the max temp was 255 when I cleared it on the past couple trips, but when I used the capture feature it always seemed to have the correct temp: 96-125 degrees on the last trip which was after compressing 10-15 degree ambient air temp to 9.5 psi. I didn't get the feeling that I had any tuning issues due to the temp sensor on my RG kit.
My sled was loading up a lot at lower boost on my Thanksgiving trip and fowling the mag side at low boost. It made a big difference when I changed the CR (crossover) from 13 (old BD setting) to 26 (which is the new BD setting for the 2010 season) on the next trip - thanks BigHoe. The mag side plug was getting really wet back in November& I think it was because the secondary injectors were coming on way too soon. The only thing I changed before the 2nd trip was the CR & my plug fowling issues were gone.
My sled was loading up a lot at lower boost on my Thanksgiving trip and fowling the mag side at low boost. It made a big difference when I changed the CR (crossover) from 13 (old BD setting) to 26 (which is the new BD setting for the 2010 season) on the next trip - thanks BigHoe. The mag side plug was getting really wet back in November& I think it was because the secondary injectors were coming on way too soon. The only thing I changed before the 2nd trip was the CR & my plug fowling issues were gone.
I finally tracked it down to a faulty motor to chassis ground. I put a ground from the head to my steering hoop and I haven't had a problem since. My ada temp has been between 50 and 150 and i have yet to see anything over 200. The issue I am having right now is when I am boondocking thru the trees (mainly mid range) and I go to get on it and it loads up and wont open up. If I let off and grab throttle again it will eventually clean out. So I on my next ride I will be using the numbers bighoe gave out and compare them to what I have now.
Any other suggestions??
Any other suggestions??
My CR number was 83 from boondocker and it burned down I believe my number now is 36 but I am goin to use the numbers Bighoe gave in your other post.
J
JHG
Well-known member
A CR of 83 is the default for the Pump Gas setup. If it burned down it was most likely because the AUX injectors never came on. 36 would have them coming on close to 7 lbs depending on how tight you have your wastegate set, which is pretty close to where you want it.
07 Boondocker RG M8 CR and OS issues
how do you change the CR #'s and the OS #'s on a Boondocker box? I searched through what i thought was all menu options in advance tuner mode???
how do you change the CR #'s and the OS #'s on a Boondocker box? I searched through what i thought was all menu options in advance tuner mode???
supertuner mode
From BigHoe February 2010.
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To check the os and cr you need to be in supertuner mode. Turn the sled off or unplug the battery. Hold the right and left arrows and plug the battery in or start the sled. The screen should say super tuner mode. Cycle through everything until you find the os and cr. If the cr is up around 83 then the aux injectors won't come on, lower that number to 30. The aux injectors will come on at about 7 lbs of boost when cr is at 30. Use the PSI low if you are under 7 lbs and psi high for over 7 lbs. You should not need to adjust the PSI H low very often, like wise with the PSI L hi. Make sure you don't get your psi mid numbers in either range to low, you need that fuel when you accelerate.
Put your box back into advanced mode when your done checking the os and cr. Don't touch anything else in the supertuner mode.
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From BigHoe February 2010.
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To check the os and cr you need to be in supertuner mode. Turn the sled off or unplug the battery. Hold the right and left arrows and plug the battery in or start the sled. The screen should say super tuner mode. Cycle through everything until you find the os and cr. If the cr is up around 83 then the aux injectors won't come on, lower that number to 30. The aux injectors will come on at about 7 lbs of boost when cr is at 30. Use the PSI low if you are under 7 lbs and psi high for over 7 lbs. You should not need to adjust the PSI H low very often, like wise with the PSI L hi. Make sure you don't get your psi mid numbers in either range to low, you need that fuel when you accelerate.
Put your box back into advanced mode when your done checking the os and cr. Don't touch anything else in the supertuner mode.
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What # do you need for the "OS" number? If you want your aux injectors to come on around 9 psi, would a CR of 40 be about right?
OS of 20 was the boondocker suggested setting as of 2009 season & that's what I've been running. CR of 40/4.5= 8.88psi
I bumped up my CR to 30 recently (from BD's stock setting of 26) to get rid of a little midrange fat-spot. I think CR=40 could max out the stock injectors unless you are at really high altitude. I ride at 10K-12K and CR of 30 works good for mine. I wouldn't trust my stock injectors past 8psi at my altitude. Keep a close eye on your DC (duty cycle) so you don't burn down before your secondary injectors come on. If you're WOT all the time, you will probably get away with it, but using mid-range throttle to sidehill during a climb, you could find a hot spot that you made by having your CR too high.
Ok, is the CR number a DC(in) value?
EG, when the box sees %30 DC(in), and its at whatever it is under boost for DC(out) it knows to turn on the aux injectors at that point, so you adjust your CR number to never acheive more than say a %92 DC(out)?
Then to tell if your injectors are working, you pretty much just watch your EGT gage to see if its getting too hot at high boost?
EG, when the box sees %30 DC(in), and its at whatever it is under boost for DC(out) it knows to turn on the aux injectors at that point, so you adjust your CR number to never acheive more than say a %92 DC(out)?
Then to tell if your injectors are working, you pretty much just watch your EGT gage to see if its getting too hot at high boost?
The BD does not use the DC (duty cycle) to assist with tuning. That number is displayed so YOU can see how much you are working your stock injectors. The BD box won't turn on the secondary injectors until boost reaches the psi level you set with the CR number. Pump gas kits come with the CR set to something like 83 (about 18psi) so that the box doesn't try to turn on the secondary injectors that don't exist with a pump gas kit. I would suggest CR=30 (approx 6.6psi) since that has been working for me & others on the forum. If you ride low altitude (below 5000 feet) you may need to use a lower CR so you get more fuel sooner.
I don't remember my exact Duty Cycle numbers, but it seems that they are in the 85% range. I figure even if the BD box says the injectors are only 92 or 95%, they could be maxed out already. It's not like the box is getting feedback from the injectors, so it's estimating the percentage.
What elevation are you at and what problem are you trying to tune?
If you want to test your secondary injectors, set the CR to about 10 and see if the sled loads up badly as soon as you come on boost at partial throttle. My CR was at 13 when I bought my sled and it was severely FAT & blubbery at about 3 to 5 lbs of boost.
I just did the race gas upgrade to my PG kit and there was nothing whatsoever in the instructions about going into 'super tuner' mode to set that CR number if you upgraded from the PG kit. I couldn't find what I was looking for in the 'advanced mode' and was thinking my box was flashed wrong or something.
I'm trying to tune it for 7,000-12,000 (but %95 of my riding will be at 8,000-11,000 feet) feet basically, so I'm thinking based on what everyone has said a CR of ~35 would probably work well for me.
That is a good tip on the DC out being a calculated number instead of directly measured, I will definatley keep that in mind.
I'm intending on running straight 100LL AV gas and basically EBC to 12 psi at ~8,000 feet and letting it adjust itself for altitude from there.
35 sounds like a safer choice to start with. I ran a 50:50 mix of 91 & 100LL last trip at 10.5 lbs and 10,000-11,500 feet so you should get along fine. I am still trying to tune out a hot spot that pops up (1350-1400 degrees) at about 9-10psi in the "Mid" occasionally when doing part-throttle climbs around the trees, but other than that mine runs WOT at 1225-1250 EGT temps. Hook up a nitrous button to use the "capture" feature and it will make fine tuning A LOT easier.
Regarding the capture button ...
What all does that store the stats screen doesn't? How do you review all the data it stores?
I've never really seen any discussion on here on the data capture, but I'm definatley interested in it.
