turbo question

seitz9 · Jan 19, 2015

I am really considering and want to put a boondocker turbo on my kx450f, I am just really struggling with the cost of the race fuel "vp c12 " is 130 for 5 gallons here .so basically for a full day of riding you are going to spend 120 ish on fuel. Am i correct or does running the higher octane result in less fuel ccnsumption. Was just looking to see how much fuel everyone is using the average price . I was also wondering if it was possible to run at a lower boost with pump gas or a spljt of pump and race fuel, Any imput is really appreciated thanx

powderzone · Jan 19, 2015

You can run aviation fuel on a turbo bike. It is a lot less expensive than race fuel and still has what you need...100 octane, no moisture, some lead, anti knock. It will get the job done. I alternate between av-gas and race fuel and can't tell the difference in performance.

seitz9 · Jan 19, 2015

I was told its damn near impossible to get av gas .... i c your from calgary where do you get it from . Im located in regina sk

pat84 · Jan 19, 2015

Stop at the Swift Current airport on your way west. Haven't been there in a few years but you used to be able to swipe your credit card at the pump and load up as much you have room for and can afford.

summitboy · Jan 20, 2015

Avgas isnt very good imo. Was never developed for high rpm etc. If you dont want/unable to run good fuel i wouldnt turbo charge. Many have used 100LL in different applications without issues. However the majority of failures i have seen or heard about are with Avgas.

seitz9 · Jan 20, 2015

Thankyou guys for the info/help its much appreciated

wwillf01 · Jan 20, 2015

seitz9 said:
I am really considering and want to put a boondocker turbo on my kx450f, I am just really struggling with the cost of the race fuel "vp c12 " is 130 for 5 gallons here .so basically for a full day of riding you are going to spend 120 ish on fuel. Am i correct or does running the higher octane result in less fuel ccnsumption. Was just looking to see how much fuel everyone is using the average price . I was also wondering if it was possible to run at a lower boost with pump gas or a spljt of pump and race fuel, Any imput is really appreciated thanx

I would look at KMS performance also for a turbo and run some of these questions by him....

powderzone · Jan 20, 2015

I use the 100LL (blue) avgas on my NOS 520 bigbore setup. Buddies on turbo bikes run the same fuel without issue. Not sure what RPM, prop / turboprop airplanes are running (probably less than a bike) but the application does require anti-knock and suitability to higher altitudes (uniform vapor pressure). 100LL meets the criteria. That said, it isn't specially formulated for bikes so there is a compromise.
Most small airports will carry 100LL since it is produced in sufficient quantities for non-military purposes. I buy mine a small airstrip in Sparwood, BC.

up-high · Jan 20, 2015

I've run 100ll in turbo Apexes for years. Talk about high rpm? Never had a problem. Of course, that 1L is a well built motor

wwillf01 · Jan 20, 2015

Does the apex go over 8 grand?

4bangrboost · Jan 20, 2015

Just mix race fuel and premium 50/50 . I do this with 110 sunoco in my turbo YZ. When i turn the boost up, I worry about other engine parts before I even think about detonation.

jskattum606 · Jan 20, 2015

wwillf01 said:
Does the apex go over 8 grand?

yup. rev limiter is at 11,300 i think

M5- · Jan 20, 2015

wwillf01 said:
Does the apex go over 8 grand?

Rev limiter is 11,300 target rpm is 10,500 on an Apex. Best motor ever to be on snow.

M5

wwillf01 · Jan 20, 2015

Agreed

up-high · Jan 20, 2015

^^^^ X2

Mtn. Muncher · Jan 20, 2015

I agree to sticking with quality race fuel. If you are going to run a little motor that hard you want to have the best in it. I also run Klots fuel lube additive for four cycle engines in my Boondocker turbo KTM 450. I ran this bike hard all last winter and took it down to do a new top end in it this year and everything looked perfect valves were even still in speck.

Allen from Timbersled

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