12 800 pro with a 13 Boondocker GT 2860 tial exhaust turbo with bogging issues.

[briand]

Have a 12 pro like the title says with a bogging issue since the kit was installed.
Just wondering if anyone has any advise as what is causing this bog.

Things I have tried so far.

1. I have checked the exhaust valves and cleaned them and did not cure it
2. look over the reeds and they are fine.
3. changed fuel nos. leaner and richer still no help.
4. plugged the exhaust valve hose after the solenoid and still no change
5. changed out plugs and even tried different gaps of .018 .020 .022 .024. nothing helped.
6. checked exhaust system, pipe for leaks and cracks none.
7. different levels of octane. and there is some help here but does not fix it.
8. lower boost levels. this seems to have the biggest change in the bog then anything. if you run lower boost level, say about 4 -6 # the bog pretty much disappears. Once you start raising it over 7# it gets progressively worse. If you ease into the throttle its gone but if you stab it, the bog is there over half the time. At 8 - 10 # of boost you can still ease into the throttle but you will start to get a bog here also and stabbing the throttle its there all the time.
9. Checked all turbo routing and hose connections all good here.
10 fuel filter was changed and pump pressure is good.

At a loss here, any advice on what to check or remedy this bog?

I have posted some of the bog issues in the Silber bullydog thread to as there are other boondocker turbos having issues too so i thought i would start a new thread about boondocker turbo bogs.

 

[carms]

are you using the stock numbers out of the box from boondocker? Do you run 50/50 mix? Is this happening ditch banging in Alberta or in the mountains? Are you hittin the DET sensor?

 

[briand]

are you using the stock numbers out of the box from boondocker? Do you run 50/50 mix? Is this happening ditch banging in Alberta or in the mountains? Are you hittin the DET sensor?

No its not hitting the det sensor, the bog comes on at around 7000 rpm. Did a rpm record on the polaris gauge and it shows it getting up to 7000 and just hangs there till you let off.

Fuel is 60% furry 108 (MON) octane and 40% 91 octane shell premium.

Fuel settings are based on the Boondocker canada web site. See attachment below. the numbers i am using is the top of the page 2013 3D Tuning Control Box for 800 pro rmk. The a/f ratios with there numbers are really close to ideal so haven't strayed to far from the original nos. just enough to get a rich or lean a/f ration on the gauge. no difference.

It Is better up high (7500 ft) but not by a whole lot.

 

[die hard poo]

Could it be a bad BD fuel controller?

 

[MATCO]

Check your muffler. I bet the baffle is loose and plugging the exhaust. I have had 2 do that same thing in my sled and I'm now on my third stainless muffler from Boondocker.

Like you said it seems to go away at low boost and come back at higher boost levels. I usually notice a rattle noise before it starts acting up and bogging.

Also you could check your fuel filter, secondary injectors and DET sensor. But my money goes to the muffler without seeing the sled.

 

[briand]

Could it be a bad BD fuel controller?

Just don't know. I'll Check with my dealer on that as he may have one i could try. good point thanks.

 

[briand]

Check your muffler. I bet the baffle is loose and plugging the exhaust. I have had 2 do that same thing in my sled and I'm now on my third stainless muffler from Boondocker.

Like you said it seems to go away at low boost and come back at higher boost levels. I usually notice a rattle noise before it starts acting up and bogging.

Also you could check your fuel filter, secondary injectors and DET sensor. But my money goes to the muffler without seeing the sled.

When i was checking all connection with the turbo I had removed the intake pipe and muffler to checkout the turbo and the muffler is fine, the baffle is still in place and no obstruction. Just put in a new filter so thats fine. Good point on the secondary injectors. How do you check them out? Just replace them?. I have no det codes or other codes so i assume the sensor is fine.

thanks everyone for the help.

 

[modrmk]

It sounds like it could be your throttle body adapter between the motor and the throttle bodies. The rubber delaminates from the aluminum causing a leak. It will definately get worse as you turn the boost up.

 

[briand]

It sounds like it could be your throttle body adapter between the motor and the throttle bodies. The rubber delaminates from the aluminum causing a leak. It will definately get worse as you turn the boost up.

Thanks i'll check that.

 

[briand]

Another thing I noticed but forget to mention was that when this so called bog happens the A/F ratio spikes up and stays really high around 20 or until you let off. I am almost beginning to believe it might be a secondary injector sticking or what not if its possible. I have no experience with fuel injectors so I don't know what to look for.

 

[modrmk]

If you have a boost leak at the adapter, it would definately give you a rich condition. Your fuel box thinks your getting say...8#'s of boost when in reality the motor is only recieving 4#'s of boost and enough fuel for 8#. The higher you turn the boost up, the more noticable the problem.

 

[briand]

If you have a boost leak at the adapter, it would definately give you a rich condition. Your fuel box thinks your getting say...8#'s of boost when in reality the motor is only recieving 4#'s of boost and enough fuel for 8#. The higher you turn the boost up, the more noticable the problem.

Thanks modrmk. Haven't had a chance yet to check boots out but i will. Work has kept me busy for the last couple of days and early evenings.

 

[gmustangt]

Pressure test the system, cap the compressor inlet, cap compressor outlet, and add compressed air in through the wastegate signal line.
Any leaks will show up real quick.

 

[MATCO]

I am having this same issue and found my turbine was all chewed up. I cannot find any reason that this happened. I have the gtx2863 and no parts are available. New turbo ordered but I would like to find out why this one went out. Jared @ Boondocker says something had to go thru the exhaust and hit the turbine wheel to break it. But I can't find any broken parts other than 2 reeds missing a sliver on the corner. I would not think a reed would cause this. Pistons, rings, bottom end all look great with 130psi comp. on both cyl.

Anyway, check your turbine wheel carefully. Mine looks like it was sand blasted or melted away on the leading edge and chunks missing. Expensive part to replace when you don't know what caused it...

 

[briand]

OK finally got a chance here to check more things out. check boots at throttle bodys, all fine here no separation and no leaks. Plugged exhaust outlet at y pipe and turbo inlet and put 5 psi in and pressure held up. so no air leaks in motor or turbo.

Did some thinking and decided to change out exhaust valve springs. took the orange out and found some old 7041786-08 Green/Yellow 8.0 - 10.0 pounds exhaust valve springs. and stuck them in. Bog has disappeared up to 8 pounds of boost and at 10 pounds is only occasionally. so this has help me out. would like to try a 7041786-07 Purple/White 9.0 - 11.0 but I think that will be next to impossible to find as polaris has discontinued a lot of the old ves springs. This has sure help me but need to do more running up in the mountains to see if it is consistent now. But remember I also have the RK tec drop in kit with the 12.1 turbo domes so this might not work for you if you want to try it out.

 

[briand]

Problem might be solved with bog

Finally got a chance here to do a lot more looking into the problem with the bog. Last time i changed out the ev springs from a orange to a 7041786-08 Green/Yellow 8.0 - 10.0 pounds. This help a lot but still had a bog at 9 to 10 pounds boost. Today at home here a 2200 ft elev I ran a 65/35 108 race and 91 octane fuel to test out some more just to be on the safe side. I ran up to 10.5 pounds boost but I changed out the ev springs from the 7041786-08 Green/Yellow 8.0 - 10.0 pounds and replaced with some new 7041786--11 PINK/YELLOW 9.0 11.5 2.323 .051 ev springs that I had for my old 03 800 edge.

Tested it for about an hour here just hitting releasing the throttle and it ran great. Just one time when I stab the throttle it went into a bog. Temp here today was +8 celsius so maybe warm conditions come into play here also but temps are going to drop off tonight to near -15 Celcius so tomorrow will take it out again and try it. Maybe its just conditions but it feels a little more responsive in the mid range.

Even if it bogs on a few occasion i can live with it. So far these EV valve spring changed seems to be the answer for my bogg issues.