bottem end issues

[supra_power2]

2010 bd m8t with 09 head, ebc and mini cooler


sled runs really hard once it makes boost however it falls on its face if u go wot from idile or if ur barley moving.

if you get into it rather slowly its fine and once it starts making boost everything is good, but for real slow tight trees, or in a sticky spot it has caused me to get stuck a few times, and well nobody else i ride with is turbo so generaly, ya im on my own to get it out.

could it be that im running to much octane? 7-8psi at 8-10k on straight 100ll
and also i was thinking bout getting my ecu flashed to a 2011 and possibly going back to a 2010 or 11 head?? any thoughts? im torn here a little becuse i wanna get the bottem end fixed, but also wanted to turn it up this year to 12lbs so i would need the octane then for sure.

 

[WyoBoy1000]

Change the reeds, typical symptoms for reeds, and for that kind of boost you could dang near get away with 91 oct. I would run 2-3gal of av for 8lbs and see how it does. If tuned right it should be fine.

 

[supra_power2]

sled only has 400 miles? was boosted as soon as it came out the crate?

i will chenck into it tho, but i think reeds are ok


anyother thoughts??

 

[ACMtnCat]

I run straight 91 on 9#s at 8-10k feet. I hit the knock sensor twice this year. I was whaling on it hard in deep powder at 8500 feet tho!

What about tps? Could that be off or wack and cause those bogs? I'd say it sounds like reeds by your description. Correct octane would be a good place to start tho.

 

[ACMtnCat]

I run straight 91 on 9#s at 8-10k feet. I hit the det sensor twice this year. I was whaling on it hard in deep powder at 8500 feet tho!

What about tps? Could that be off or wack and cause those bogs? I'd say it sounds like reeds by your description. Correct octane would be a good place to start.

 

[Tonysnoo]

I've got a different animal, but had similar symptoms. I have an early M8motor, big turbo and a 2011 pipe and it is an animal when it got going but flakey on the bottom end. OK one time..... kindy pukey the next, especially when the belt has some wear.

I recently rode with the OVS guys and they suggested that I try the early pipe. Wow! its a rock crawler on the bottom now. I did have to add 8 grams to each arm to pull like the 2011 pipe on the top. Just one test ride, so I'm still tuning with this setup, but it's showing lots of promise!

Not to say you need to run out and get a different pipe. I guess there are so many things that can change bottom end tuning, but this was one big difference for me.

 

[av8er]

I ran my sled 2day

09 TM901 just put in new pipe sensorm was at base elevation 7300 fett and then went up from there 55 degrees outside, My box was turned up a lot, runnin rich, wot 1306, but was real boggy on low end, would blubber and if I shut it off real hard to start back up, but at mid throttle wot temps were good and it ran hard.

 

[WyoBoy1000]

I run straight 91 on 9#s at 8-10k feet. I hit the det sensor twice this year. I was whaling on it hard in deep powder at 8500 feet tho!

What about tps? Could that be off or wack and cause those bogs? I'd say it sounds like reeds by your description. Correct octane would be a good place to start.

You mean tss? if the throttle cable is to tight it can sometimes cause a low end bog. but it feels more like a shut down then a bog.

If the clutches start going bad, rollers, bushings etc... could cause it also but not likely with low miles, but look to make sure the primary clutch weights are centered and if you are running the stock rollers in the secondary replace them with hi-torque or rock rollers. Try a new belt and different belt deflection also.

 

[wasatchcomm]

2010 bd m8t with 09 head, ebc and mini cooler


sled runs really hard once it makes boost however it falls on its face if u go wot from idile or if ur barley moving.

if you get into it rather slowly its fine and once it starts making boost everything is good, but for real slow tight trees, or in a sticky spot it has caused me to get stuck a few times, and well nobody else i ride with is turbo so generaly, ya im on my own to get it out.

could it be that im running to much octane? 7-8psi at 8-10k on straight 100ll
and also i was thinking bout getting my ecu flashed to a 2011 and possibly going back to a 2010 or 11 head?? any thoughts? im torn here a little becuse i wanna get the bottem end fixed, but also wanted to turn it up this year to 12lbs so i would need the octane then for sure.

i run the same set up as you, if i had the 09 head on my sled i would be running 50/50 avgas/premium for my elevation which is 4k-7k
so i would think wyoboy is correct you are losing a lot of bottom end with the over octane, i would try the 50/50 mix, if you get a octane code thrown turn boost down 1lb at a time till you quit getting code
or go back to the 2010 head and keep running the avgas 100%
or crank the boost up to 12lbs like you wanted to.
i ran a couple rides this year at 8lbs with 2 gallons of premium in a tank and i have the 2010 stock head, no problems till i ran it up to around 9lbs, this is at 5500' elevation mind you....
the bottom end is real lazy when you have to much octane.
just the same i would check your reeds also.
i got about 1000 miles out of my first set, and the second set is about due, but with the higher air temps it will eat up the reeds quicker, IMO!!!

 

[supra_power2]

clutching is all in good shape, belt is next to new, belt deflection checked before and after, problem still there. im guessing its a combonation of oct. and maybe some minor low end box changes,

like i said . . say im on a trail racing another sled from a dead stop if i hammer it i could get beat by a m5.

if i hammer it it will fall on its face and then if it let off and get right back into it then it will go, (i would be moving maybe 2-5 mph by the time i get back into it and it takes off.


or i can sort of slowly get into it almost like the motor, or fuel or lag or something had to just catch up a bit, maybe a couple pounds of boost and then BOOM no skis, and haulin the mail.


i will keep looking into it, i apreciate the comments

 

[WyoBoy1000]

first get the octane figured out.
Sounds like a low end lean condition, does this happen every time you try it or just right after you start it, mine does it right after I start it, figured it take a few seconds to charge the capacitor then its fine. I would try added a bunch of fuel in the normal settings at 3000 low mid hi, try just adding +5 to each and see what happens it should get worse or better, if it is better but still bogs try +8, +5, +3 then in 5000 add +3, +2, +1. see what happens, if nothing else it might tell you something.

 

[Dogmeat]

2010 bd m8t with 09 head, ebc and mini cooler


sled runs really hard once it makes boost however it falls on its face if u go wot from idile or if ur barley moving.

if you get into it rather slowly its fine and once it starts making boost everything is good, but for real slow tight trees, or in a sticky spot it has caused me to get stuck a few times, and well nobody else i ride with is turbo so generaly, ya im on my own to get it out.

could it be that im running to much octane? 7-8psi at 8-10k on straight 100ll
and also i was thinking bout getting my ecu flashed to a 2011 and possibly going back to a 2010 or 11 head?? any thoughts? im torn here a little becuse i wanna get the bottem end fixed, but also wanted to turn it up this year to 12lbs so i would need the octane then for sure.

7-8 psi at that altitude you are fine on 91 pump, don't run the 100LL. I was doing the same thing on 12 psi and the bottom end was terrible on it. I still mix %10 110 race just to be on the safe side, but yeah, the bottom end is a lot cleaner on pump gas than 100LL.

Also, I'm ditching my IC next year. You don't need one at 8 psi. Allthough, I'm not throwing the IC out. 60 degree spring riding, I still never see above 140 F charge temps at 8-9 psi with it, so it does have its uses

For cold weather deep pow boondocking, ditch it though.

 

[WyoBoy1000]

7-8 psi at that altitude you are fine on 91 pump, don't run the 100LL. I was doing the same thing on 12 psi and the bottom end was terrible on it. I still mix %10 110 race just to be on the safe side, but yeah, the bottom end is a lot cleaner on pump gas than 100LL.

Also, I'm ditching my IC next year. You don't need one at 8 psi. Allthough, I'm not throwing the IC out. 60 degree spring riding, I still never see above 140 F charge temps at 8-9 psi with it, so it does have its uses

For cold weather deep pow boondocking, ditch it though.

Ditching the IC will need retuned, I know you guys have bd kits but the first thing I would do is throw on a 2876 and convert to twisted kit. IMO

 

[supra_power2]

over all im still very happy with my dealer, they have stood behind the sled even being turbo better than any other dealer ive ever seen (yellowstone motorsports belgrade MT) and code red performance and boondocker, aside from this minor issue, sled is hella fast and seems very well built and tight. i love it!

thumps up to boondocker, even though i believe u really cant go wrong with any of the major brands on the market, install and tuning is a huge part.


i will try some of those things and im sure it will be fine,


thanks for all the ideas

 

[WyoBoy1000]

Let us know what you find, have you had to take it to a dealer before.

 

[akholland]

I would also like to know what you found. My 09 M1000 pg turbo is doing the same exact thing, except that it runs like a raped ape if you shut it off and start it back up and hit the gas. but on the second grab of the throttle it's dogging if I let it under boost.