MPI Turbo From Yamaha????

[Yamadog]

I do agree there is some small print " if " the turbo causes the issue that it wont be covered but if its kept stock at the less then 6 pounds of boost I really don't see this being a issue. I am sure this verbiage was added because Yamaha knows their will be guys kicking up the boost so they have to cover themselves some how. Yamaha and MPI have put the trail and mtn kits through alot of testing and some serious abuse. The motor is not what you need to be worried about if kept less then 6 pounds of boost . I'm more worried about the rest of the sled falling about around the motor.

Well I know of 2 that went down last year with 6 or less #'s of boost and were not warrantied same verbage in our warranties.

 

[Kerrdog569]

Bad fuel?what caused them to go down,lost fuel pressure?just curious

 

[yamahaguy]

Yamadog did you ever hear what happened with those 2 ?

 

[Kerrdog569]

I didn't spring order my sled so I don't know anything about the warranty you got but when I went with the hurricane kit I got a one year engine warranty with it and a one year chassis warranty through yamaha which equals the same as with the mpi kit. By going with the hurricane kit I saved money on the install to. Two hours for hurricane versus the 8 hour estimate for the mpi but mind you mine was the first done through my local dealer. But Dave himself installed my kit

I got a 5yr warranty thru yamaha

 

[Yamadog]

Mine was dropping cylinders from new and was only at 4#'s of boost. at just over 800 miles it notched the cylinder walls between 1 & 2. The other one was blamed on the KOSO gauge giving bad AFR reading and blew up while Pat Hauck was riding it testing the clutch kit.

 

[yamahaguy]

Sounds like yours maybe had a issue from new with something else and was blamed on the turbo? That sucks.

Matt from MPI told me with the stock trail kit and the electronic boost controller that (Yamaha required) you would not need a gauge. I hope that's still the case.

 

[Kerrdog569]

I was told the same thing

 

[yamahaguy]

I have more trust in the boost controller that Yamaha endorsed then a gauge that they didn't endorse. I wonder if the sled that blew up for Hauck was a stock trail kit with less the 6# ?

 

[Yamadog]

Yes I know the new controller should be better. I still want to know what my #'s are but it still does not take care of everything. The biggest problem in my opinion is the Nytro ECU has a knock censor the CAT ECU does not. So you can have enough fuel but poor fuel quality or low octane cannot be read on a gauge.

 

[Kerrdog569]

Yes I know the new controller should be better. I still want to know what my #'s are but it still does not take care of everything. The biggest problem in my opinion is the Nytro ECU has a knock censor the CAT ECU does not. So you can have enough fuel but poor fuel quality or low octane cannot be read on a gauge.

It would be nice if there was a knock sensor we could add with a light on our dash,when it senses pre ignition it would flash or something to let us know we have a problem

 

[Yamadog]

I have more trust in the boost controller that Yamaha endorsed then a gauge that they didn't endorse. I wonder if the sled that blew up for Hauck was a stock trail kit with less the 6# ?

They did not have the trail kit last year it was and is the stage I and he was at 6#'s

 

[Studroes144]

Fuel is the biggest thing people should have in mind, stock ecu works and the stock engine can withstand a lot! Matt from mpi posted awhile back that they dynoed a stage 1 kit at 252 hp to be exact I believe and that was with a totally stock engine, no head shim or anything like that. I believe he stated that the only changes made to the stage 1 kit was that they added the 4th injector and bigger fuel pump and that was running on 110 octane fuel. That should be a good sign right there that the ecu and engine aren't the biggest concerns, there's a lot of performance gains tied up in the stock ecu, but for the trail and stage 1 kits I wouldn't worry at all about that. Make sure you have good gas and enjoy the power.

 

[bluesrxman]

my dealer was told feb 3 but that is because we just bought the sled last week.

I purchased my sled and Turbo kit last week and my dealer got confirmation from Yamaha that turbo will be in by January 19

 

[Yamadog]

Fuel is the biggest thing people should have in mind, stock ecu works and the stock engine can withstand a lot! Matt from mpi posted awhile back that they dynoed a stage 1 kit at 252 hp to be exact I believe and that was with a totally stock engine, no head shim or anything like that. I believe he stated that the only changes made to the stage 1 kit was that they added the 4th injector and bigger fuel pump and that was running on 110 octane fuel. That should be a good sign right there that the ecu and engine aren't the biggest concerns, there's a lot of performance gains tied up in the stock ecu, but for the trail and stage 1 kits I wouldn't worry at all about that. Make sure you have good gas and enjoy the power.

You can do a lot of things in a controlled environment. 10 mins on a dyno vs 300 miles in a day on the trails is the problem. Having to take the stations word for what gas is in the ground tank is the problem. I blend to 96 min octane but to carry enough 110 on the trail to make sure is impossible. I went with lower compression Wiseco pistons to get it to run on lower octane but one mistake and its another motor. Even at 5#'s a drop in octane of 4 pts by mistake or unscrupulous station is certain death.

 

[Yamadog]

It would be nice if there was a knock sensor we could add with a light on our dash,when it senses pre ignition it would flash or something to let us know we have a problem

A light does nothing by the time you would see it your picking up parts on the trail. The Yamaha ECU makes changes to counter it.