The Fingertight Racing Sidecar Project

**Drew** · 11th July 2013, 19:31

Originally Posted by Moooools

Also I can't imagine standard float bowls are much use with any sort of lateral G. But I don't know if they will actually stop fuelling or just try and spill out the overflows.

Hasn't presented any issue on the carbed full size ones I've ridden. Prolly getting higher lateral G's on those than a bucket.

**wildman** · 11th July 2013, 19:34

Originally Posted by Moooools

Hey now I didn't say it was just your chair!
I was referring to a variety of three wheeled automotive contraptions that have turned up. I don't know if a jet has specifically fallen out on any chair but there seems to be a repeating issue of engines not fuelling properly in these things.

You forgot the exhaust snapping off and firing out the side of the chair,

Doh that was mine.

**wildman** · 11th July 2013, 19:39

Originally Posted by Drew

Hasn't presented any issue on the carbed full size ones I've ridden. Prolly getting higher lateral G's on those than a bucket.

The vaccum pumps being used are go-kart ones, and the trick to getting them working right is make sure the pulse line is as short as possible and the right material and ideally should be picking up from the crankcase, not inlet tract and fit adjustable vavle in bypass line.

**Henk** · 11th July 2013, 20:04

We've found the trick to be to run the fuel in a loop with a T down to the carb and basically letting it gravity feed down. Header tanks and the like we're causing issues with getting pressurised, only real bugger with ours and the vacuum pump is manualy priming it by doing a suck blow on the vacuum line to the pump before the first run, but I think I have the solution for that.

**Kickaha** · 11th July 2013, 20:51

Originally Posted by Drew

Pressure regulator fixes the over fueling on carbs.

There's a Yamaha fuel pump with built in regulator which is an even better fix

Originally Posted by wildman

The vaccum pumps being used are go-kart ones, and the trick to getting them working right is make sure the pulse line is as short as possible and the right material and ideally should be picking up from the crankcase, not inlet tract and fit adjustable vavle in bypass line.

We used a Holley fuel regulator with those Mikuni pumps set at about 1.5-2psi, still not as good as the electric Yamaha pump (if you have a power supply)

**Henk** · 13th July 2013, 16:53

Going to be quite crowded out there tomorrow if everyone turns up. Brian has welded a third wheel to the AX.

**Pumba** · 13th July 2013, 17:08

Originally Posted by Henk

Brian has welded a third wheel to the AX.

That sounds scarier than my unproven rig.

**Henk** · 13th July 2013, 17:38

He's never going to wear out the tyre on the third wheel with the amount of time it spends in the air.

**Rick 52** · 13th July 2013, 19:55

Originally Posted by Henk

He's never going to wear out the tyre on the third wheel with the amount of time it spends in the air.

It's the scariest thing I have even made go forwards !

**ac3_snow** · 13th July 2013, 20:02

Originally Posted by Pumba

That sounds scarier than my unproven rig.

Haha I prefer.... 'Exhilerating'

**Henk** · 13th July 2013, 20:43

Originally Posted by Rick 52

It's the scariest thing I have even made go forwards !

Wasn't that bad, how would you feel about selling up our rig and welding one of our spare kart wheels on the side of the road bucket, if we extend the platform miles to the front we may even be able to make it go round corners, and the up on two wheels thing is great fun.

**koba** · 14th July 2013, 15:26

Originally Posted by ac3_snow

Haha I prefer.... 'Exhilerating'

Show us a fota!

**Henk** · 14th July 2013, 18:44

Bloody entertaining today. Six starters, all finished race one and five started and finished race two. Conditions could have been better, had to take a completely different approach to swinging today, forget about keeping the chair wheel on the deck and concentrate on trying to get SOME drive to the rear wheel, bloody hilarious as always.