Bender II blowing oil out the turbo still....any revelations

[Turbo lover]

I have not been spending any time this summer on this site like a dumbass. Has anyone come up with anything better than a 90 main jet in the oiler line for a fix. The main jet did slow it down more than half. I still use about 1qt of oil per 100 miles. Thanks for your time guys.

 

[4strokes are better than2]

you need a crank case pressure release kit think you can get from lightning pro will solve the prob.

 

[Mountaintech]

Has nothing to do with crankcase pressure. His turbo is consuming oil, probably through the intake side seal. IMO Benders turbo lube system is poorly engineered. The suction return seems to not be matched to the supply. No catch tank (post turbo) plus electric pump is not variable flow. It tries to pump as much at idle as it does at 10000rpm. The MCX system works well with its variable pump, catch tank, and venting.

 

[Ted Jannetty]

It does have a lot to do with crankcase venting, I was playing around with mine on the jack stand idling, and I stuck my thumb over the vent hose for 3 seconds and my sled started to smoke like a train, the turbos cannot have any crankcase pressure present or oil will go by the seals.

also .090 sounds a little big, most only need a .030 jet for oiling but check with your turbo manufacturer.

 

[Turbo lover]

Ted, What you describe is not what I have going on. You are using oil from the crankcase and it is going out of your exhaust. My problem is the oil supply to the turbo is excessive and the return is not matched as RX Fun describes. The mainjet is used in the supply to restrict the oil flow. my issue is not generated at the engine it is at the rear mount turbo.

anyone one else heard anything new in this department??

 

[Mountaintech]

Doc, I know of more people with the same problem. Does the back of your sled get dirty from the exhaust? Is there oil in your intercooler? Everyone experiencing this problem should be talking to Bender so they come up with a solution.

 

[Turbo lover]

Yes and yes. I know of 5 people with these 3 have problems and 2 dont. I dont understand. I am going to call him. He sent us a new turbo and that didnt do it, then the mainjet solved the problem for many, but not us. That is why I was hoping someone came up with something or has talked to Terry lately.

 

[Mountaintech]

Doc, PM Spray25 if he isn't one of the three you are talking about.

 

[thinksnow]

Talk with Spray25. He is a great guy. He helped me out with some questions. He had me rotate my turbo to help with this problem. Ask him about the fix.

Lance

 

[Skydog]

Jet fixed 95% of mine. Make sure your air filter is clean to!

Skydog

 

[Ted Jannetty]

Ted, What you describe is not what I have going on. You are using oil from the crankcase and it is going out of your exhaust. My problem is the oil supply to the turbo is excessive and the return is not matched as RX Fun describes. The mainjet is used in the supply to restrict the oil flow. my issue is not generated at the engine it is at the rear mount turbo.

anyone one else heard anything new in this department??

I gathered that but I thought I would throw it out there anyway, but I am still concerned about the jet being too big, if you go on ATP web site they show a .030 orifice for this series of turbo.

Ted.

 

[LightningPro]

Doc,

I am not totally familiar with the bender setup but have you checked your oil return lines for any restrictions or possibly being undersized? If the turbo and scavenge pump have to work hard to remove the oil, the turbo will burn some oil. I know that the initial fix has been to restrict the oil flow (not oil pressure) to the turbo, but it is better to have plenty of free flow for the oil return. We supply unrestricted oil pressure/flow to our turbo but have a very large drain line, and seems to work very well. I think Ted J. is using a pretty good sized return drain line also with good results.

Bob Flores
www.LightningProLLc.com

PS If you don't have some kind of extra crankcase venting, it is probably adding to the oil burning problem. I think this can apply to all the turbo kits for the RX in general, according the calls I get. This is not a slam against anyones kit but hopefully some helpful information. I would rather see everyone running at the top of their game instead at the sidelines, it is more fun when everyone can play. Give me a call if I can help.

 

[Mountaintech]

Bob, the Bender kit is a rear mount with the turbo behind the seat and the oil scavenge pump mounted in the nose of the sled. This means that the line connecting the two is very long. It may well be too restrictive as you suggest, but you're still dealing with an oil pump that pumps at a fixed rate. I believe the way to solve this problem is to build a catch tank that will collect the oil as it exits the turbo housing,vent it, and evacuate the oil from the tank with a variable speed, variable flow (engine mounted) pump. Porsche used the same system on the 911 Turbo. I believe Ted is running a front mount turbo, so in his case his oil return would simply be gravity through an appropriately sized return line.

 

[Turbo lover]

Does mcxepress rear mount use the same oiling system for the turbo???

 

[Skydog]

Get a .030 orifice frist!