Big HP means $$$$ fuel

[BO4RE]

Im referring to boosted 4 strokes in particular. Obviously everyone can agree that the mileage goes out the door when you turbo or sc your sled, that being said I can no longer realistically consider anything beyond 10 lbs of boost. In order to run these high boost applications race fuel is basically an essential ingredient, and the costs are insane. From a few shops in the city I found 108 octane to be about $3 per litre, thats like $120 per tank, who can afford that, a $20000 sled is one thing but spending a $100 a day in fuel is just not in the budget, I am so dissapointed, clearly the only way I can get arround this is to hijack a VP racing fuel rig, and hide it in my garage. Anyway thats just my 2 cents.

 

[powderlites]

boosted sleds

Vector with front mount turbo runs great and is cheap on fuel.
15 lbs boost on pump gas when setup right and just sips the fuel compared to Apex superchager.
Out handles Apex and can be lighten up more them Apex.
High torque motor ildles along on trails for better then stock mileage because of turbo clutching.
So there is your boosted sled and cheap to run.

http://www.powderlites.com/turbokits.html

 

[ken_climb]

My fuel economy didn't change after the turbo...and av gas is $1.25 a litre and alows me to run 16lbs of boost all day long with stock engine and head shim.If you want to run premium pump fuel, 13lbs all day long with the mcx rear!

 

[TurboJamie]

Running 10 PSI in MPI supercharger on pump 91 octane fuel. I get 100 Miles to a tank of gas. Not to bad for the HP increase IMO.

 

[HAMMER]

Everybody I know gets about the same were we ride 6-7 mpg, no groomed trails, long hard pulls at 10,000 ft. I know of 7 trxs, same riding conditions, same mileage, running between 8 and 20 lbs boost. It just depends on riding style and conditions. The turbo adds more air and burns more fuel thats what makes hp. If you are getting the same mileage as you did without turbo or sc then you are not using the hp.

Like snowy stated in another thread, bottom line is, it takes fuel to make horsepower, no way around it. 12:0 AFR at xxx boost, making xxx horsepower, is going to require xxx fuel. More horsepower = More fuel. If you want to run pump at high boost levels adjust your compression, ignition timing, cam timing, or all, accordingly. I’m sure Dave (www.powderlites.com) and some others can get real specific on the limitations of hp/boost/timing/octane, for the Yamaha snowmobile application, from their considerable on-the-snow experience.
Just like any other motorsport, performance will cost ya, how much can you afford...

 

[Trxster]

I guess you have to ask yourself how much hp you need. I've been running 10-12psi with pump gas and a little AV gas mixed in with 3 head gaskets and it seems like plenty to get yourself into some serious situations. If you're racing or climbing bigger stuff than a person can climb with 240hp then you should be sponsered (or in videos) and the $$$ should be a little less of a concern. Just my $0.02


Rt

 

[Mountaintech]

Mileage does not necessarily go out the door after turbocharging. When everyone else is pinned to go places the turbos can get there at half throttle. My mileage hasn't changed much since turbocharging as long as I don't hillclimb wide open all day long. Like everyone else said, if you're not happy with 12lbs. on pump premium, go buy avgas and you're good till 17 (with head shim).

 

[nitrousmudbogger]

e85 is a nice alternative also

 

[nitrousmudbogger]

water injection is also a good idea,just a few cheap hints

 

[snowy1]

20+ lbs boost +nitrous and I still want more, guess I,ll have to pay the extra for good fuel, it cost money to go fast, but if I run low on $ I can turn it down to about 12-14lbs and run pump fuel with LC pistons and 2 head gaskets at 10,000 ft.