Motorcycle frame design question

[Dakin Engineering]

bak,
  Do you have any pictures?

Regards,
Sam

[peterdallan]

It appears, when looking at the record books, that motorcycles using fuel are only marginally faster than their gas counterparts. From all your comments it looks like fuel mileage using FUEL is considerably worse that an engine using gas.

Am I right in thinking that fuel is often used because of it's cooling properties or are there other reasons I should consider this route?

Cheers

Peter

With the 6T Tri. engine on gas (petrol to you) about 1 gal. should be enough......Our frame tank was a 3 inch dia. tube, 2 feet long.....after our run on the salt we had about a couple of pints left in the tank.....
our engine was a pre-unit Tri. using a 750c.c. Morgo Kit, running thru a BSA close ratio gearbox.......
The bike has been retired and sold and is on display at some Texas truck stop....Oh, the shame of it all....

[55chevr]

That is because most of the fuel records were set with non event gasoline. Check out the big displacement push rod engines and you will see a dramatic difference ... as in Harley's on nitro.

[JimL]

Re: fuel burn for 650cc pushrod (gas).  I'm running one PG/PF engine at 680cc (750 class) and an engine at 647cc.  We found less than 1/3 gallon gasoline burn per run (3 mile).  This with 38mm Mikuni and 230 main jets, for your comparison.

If you make your tank (tanks) very easy to get on and off, it'll be easier for fuel check and for record cert.  Food for thought; twin tanks means more connections and lines to route/cover correctly (especially for fuel class).  We're doing fine on the MPS-PG-650 bike with a single tank offset to the left (meeting the 5 liter minimum rule).  Leaves room for the coil pack on the right, and still get the rider low.

Hope this helps.

Regards, JimL

[bak189]

If you are planning on using real fuel (not petrol) in your 6T....best get some Carillo con-rods...........

[ol38y]

If you are planning on using real fuel (not petrol) in your 6T....best get some Carillo con-rods...........

Plan on at least 2 months to get yur Carillo rods also... 

[peterdallan]

We are using R & R rods in the build.

www.rrconnectingrods.com

Peter

[oz]

You know where I am if you need a hand peter, If you want oversized tube I can always roll and weld for you if need be.

Oz

[peterdallan]

Cheers OZ appreciate it.

Was looking to give you a call sometime with some questions if that is ok mate?

Peter

Can't find your mobile, if ok can you pm me it, cheers

[Seldom Seen Slim]

Dare I ask - what's a "hand peter"?

[Stan Back]

Same as a hand job?

[oz]

LOL maybe I didnt phrase that quite right.
I dont mind helping anyone but I aint going that far not even for a fellow racer they can use there own spanners for that job!!
Pm sent