SDI-premixing

[HotShotHarry]

What do you guys think about premixing extra oil in the gas tank as added insurance against a breakdown in the 1000 sdi engines? If ok then what ratio? Would this cause a overly lean condition?

 

[Summitric]

Hmmmmm, Don't Think I Would Mix Too Much.... When My Sled Was New, The Dealer Said Put 1/8l Of The 2stroke Oil Into The Gas Tank, Just To Break It In... They Said Don't Run Anylonger, As The Injectors Might Plug Up.... Run Too Rich And The Spark Plugs Will Foul...... Mine Fouled In The First 5 Kms I Had The Sled, When I Had The Extra Oil In It For Breakin....... Injectors Are Finicky!!!!

 

[renegade x]

Why would you need to premix an sdi after the first tank of fuel?

 

[HotShotHarry]

There is some talk on the mach z dootalk site about adding oil to the fuel as additional insurance against the injectors washing too much oil off the pistons and causing premature piston failure. There is a suggestion that 100\1 mix may help. What I am wondering is if this would cause a leaner situtation especially in the mid rpm range which is already known to be quite lean to begin with? Any thoughts on this?

 

[Summitric]

There is some talk on the mach z dootalk site about adding oil to the fuel as additional insurance against the injectors washing too much oil off the pistons and causing premature piston failure. There is a suggestion that 100\1 mix may help. What I am wondering is if this would cause a leaner situtation especially in the mid rpm range which is already known to be quite lean to begin with? Any thoughts on this?

DON'T RUN IN THE MIDRANGE??? LOL

 

[HotShotHarry]

Well you know sometimes other people want to ride it too!!!!

 

[HotShotHarry]

Specially those guys on them cute little 800s. That would be about half throttle for them wouldnt it?

 

[Summitric]

You Know, A Small Amount Of Oil In The Gas Tank Shouldn't Hurt Anything.... If Anything It Will Be A Little Richer(not Leaner) With The Oil In It.....

 

[Summitric]

I Actually Put Lucas Octane Booster In It, And Seems To Doo The Job, Too.... Rather Than Putting Oil In The Gas.....

 

[HotShotHarry]

Actually I think it would be a little leaner as you would have 1 part per 100 less gas injected with each pulse with a 100 to 1 mix. The 1 part being oil instead.Enough to make a difference? I dont know. I also think a little lube for the injectors might be a good thing. Perhaps GLENN would have some info on this?

 

[Shredder]

These are lean in the mid range. I run +2 at 5000RPM and up to +5 at 6700 RPM. Then down to -10 at 7800 RPM to see around the 1175* EGT range across the board. That was with the '06 programming. I wouldn't think running a 100:1 premix would have any dramatic effect on running conditions, including EGT's. I've been dooing similar to what Summitric has been doing with his octane booster; except I am running a gallon of VP fuel per tank.

 

[Summitric]

These are lean in the mid range. I run +2 at 5000RPM and up to +5 at 6700 RPM. Then down to -10 at 7800 RPM to see around the 1175* EGT range across the board. That was with the '06 programming. I wouldn't think running a 100:1 premix would have any dramatic effect on running conditions, including EGT's. I've been dooing similar to what Summitric has been doing with his octane booster; except I am running a gallon of VP fuel per tank.

THE OCTANE BOOSTER ALSO HAS LUBRICANTS IN IT, THAT'S WHY I LIKE RUNNING IT..... JUST A LITTLE ADDED INSURANCE.... WILL HAVE TO TRY SOME RACE GAS SOME DAY, BUT DON'T THINK IT WILL HELP MUCH. THE RACE FUEL WON'T BE AVAILABLE AFTER JAN 1/09 ANYWAY!!!

 

[HotShotHarry]

I dont have a booney box or an egt guage so I cant see whats happening but if im understanding you guys correctly, you are adding octane boost to lower combustion temps by lowering the flashpoint. I see you are also running VP fuel, I am assuming it has a higher than 92 octane rating thereby reducing temps even futher. This has got me wondering what kind of temps were you seeing before using the box to richen the mid range?

 

[Summitric]

I dont have a booney box or an egt guage so I cant see whats happening but if im understanding you guys correctly, you are adding octane boost to lower combustion temps by lowering the flashpoint. I see you are also running VP fuel, I am assuming it has a higher than 92 octane rating thereby reducing temps even futher. This has got me wondering what kind of temps were you seeing before using the box to richen the mid range?

I DON'T HAVE A BOX OR GUAGE YET EITHER.... JUST DEALER RECOMENDATION WHEN THEY SET IT UP. I AM GETTING THE BOX AND GUAGE THOUGH!!! ADDED INSURANCE

 

[HotShotHarry]

I just read summitrics comment about the octane booster having lubricants in it. I like that. that is possibly the better way to go.

 

[HotShotHarry]

How much octane boost are you guys adding? Oh and thanks for the replys.

 

[SLEDBUNNYRACING]

We can try a little race fuel this weekend.

THE OCTANE BOOSTER ALSO HAS LUBRICANTS IN IT, THAT'S WHY I LIKE RUNNING IT..... JUST A LITTLE ADDED INSURANCE.... WILL HAVE TO TRY SOME RACE GAS SOME DAY, BUT DON'T THINK IT WILL HELP MUCH. THE RACE FUEL WON'T BE AVAILABLE AFTER JAN 1/09 ANYWAY!!!

 

[Summitric]

We can try a little race fuel this weekend.

EXCUSE, US BIG GUYS, BUGS, BUT THIS IS 1000 SKI-DOO ONLY TERRITORY, RIGHT GUYS!!!! LOL

 

[HotShotHarry]

Ya, havent you been reading properly? Our sleds dont like half throttle!!!

 

[SLEDBUNNYRACING]

Just so I'm clear, you don't want me to throw a little race fuel in your tank (for free) to see if it makes any difference at all...Hmmm...that seems strange...no problem...lol...
Reallya Tank 1000

EXCUSE, US BIG GUYS, BUGS, BUT THIS IS 1000 SKI-DOO ONLY TERRITORY, RIGHT GUYS!!!! LOL