Fuel Economy For Small Block For Touring!

[Psychedelicropcircle]

I was up north last weekend applecross to glencoe village 125 miles used 9 litres on the button GT186.

[burnside]

I was up north last weekend applecross to glencoe village 125 miles used 9 litres on the button GT186.

What's your setup with the GT186 as in pipe, carb and jetting?

[Psychedelicropcircle]

I was up north last weekend applecross to glencoe village 125 miles used 9 litres on the button GT186.

What's your setup with the GT186 as in pipe, carb and jetting?

Mb clubman 28mm phbh av266 x13 125 Main jet. Using a cyclone on it as well which I think makes it a little less fuel efficient.

[Rich Oswald]

I was up north last weekend applecross to glencoe village 125 miles used 9 litres on the button GT186.

What's your setup with the GT186 as in pipe, carb and jetting?

Mb clubman 28mm phbh av266 x13 125 Main jet. Using a cyclone on it as well which I think makes it a little less fuel efficient.

My Cyclone improved the fuel efficiency, isn't that the norm?

Rich'

[holty]

i would expect a 5th gear to improve your mpg but that would be reliant on having enough power to pull the 5th gear, without having to hold it at wide open throttle, final drive ratio will be very important as will engine set up, having your jetting bang on should give best results for economy, a good set up on a rolling road will help with your mpg for sure.

[Psychedelicropcircle]

Pre cyclone I done aviemore to home 136 miles in a Oner. With cyclone ran out about 5 miles short. Appreciate I could have had head winds etc.

[burnside]

I was up north last weekend applecross to glencoe village 125 miles used 9 litres on the button GT186.

What's your setup with the GT186 as in pipe, carb and jetting?

Mb clubman 28mm phbh av266 x13 125 Main jet. Using a cyclone on it as well which I think makes it a little less fuel efficient.

That would explain why you are getting better figures than me, I'm running 30mm phbh and franspeed race, I do tend to ride it quite hard and it is rich mid-range but getting around 10 miles per litre, hoping to get another 1 or 2 miles per litre with some fine tuning

[Swat]

My Cyclone improved the fuel efficiency, isn't that the norm?

Rich'[/quote]

Rich - Not if you're Binny !! or trying to keep up with him, then its 10 miles/litre if you're lucky

[Bilko]

I have the small-block GT Bilko and use it all year round, including for the Euro/C2C etc. In about 10k miles I haven't had any reed issues and they are doubled up.
I would advise checking that the casting allows the reeds to open fully though (I needed a manifold packer) and whether the manifold touches the frame (might need to use eccentric cones and/or fettle the manifold).

When doubling up the reeds, what side do you double or do you double both?

Also. when you say check reeds fully open, how much is fully open?

Thanks

[ULC Soulagent]

I think the reeds closer to the piston needed too be doubled up
And optimum opening is around 7-9mm on the petal stops

[Scooterdude]

I think the reeds closer to the piston needed too be doubled up
And optimum opening is around 7-9mm on the petal stops

isn’t that the main problem, there are no stops?

[Solid Air]

I have the small-block GT Bilko and use it all year round, including for the Euro/C2C etc. In about 10k miles I haven't had any reed issues and they are doubled up.
I would advise checking that the casting allows the reeds to open fully though (I needed a manifold packer) and whether the manifold touches the frame (might need to use eccentric cones and/or fettle the manifold).

When doubling up the reeds, what side do you double or do you double both?

Also. when you say check reeds fully open, how much is fully open?

Thanks

I doubled up on both sides. The reeds fouled on the inlet casting so used a packer, 3mm I think, to lift them away from the metal that they touched when opening... hope that makes sense

[Bilko]

I think the reeds closer to the piston needed too be doubled up
And optimum opening is around 7-9mm on the petal stops

isn’t that the main problem, there are no stops?

Thanks Shane

I think the reeds closer to the piston needed too be doubled up
And optimum opening is around 7-9mm on the petal stops

isn’t that the main problem, there are no stops?

Correct

I have the small-block GT Bilko and use it all year round, including for the Euro/C2C etc. In about 10k miles I haven't had any reed issues and they are doubled up.
I would advise checking that the casting allows the reeds to open fully though (I needed a manifold packer) and whether the manifold touches the frame (might need to use eccentric cones and/or fettle the manifold).

When doubling up the reeds, what side do you double or do you double both?

Also. when you say check reeds fully open, how much is fully open?

Thanks

I doubled up on both sides. The reeds fouled on the inlet casting so used a packer, 3mm I think, to lift them away from the metal that they touched when opening... hope that makes sense

Thanks, yes it does.

[ULC Soulagent]

I think the reeds closer to the piston needed too be doubled up
And optimum opening is around 7-9mm on the petal stops

isn’t that the main problem, there are no stops?

No wonder they breaking then