Salt Flash. A Bonneville Beezer.

[lsrjunkie]

Awesome Briz! I'll be on the look out for you guys! see you in sixty some odd days!

[tauruck]

I wish I could say the same.

[wobblywalrus]

The needle valve that works with a pressure system can be smaller than the equivalent valve for a gravity setup.  It is possible to put in too large of a needle valve and it will not seal against a pressurized line.  This is stuff I read yesterday when I was dealing with my own problems.

This makes sense when you consider that the upward force exerted by the floats on the needle is spread out across the needle seat and force / area = pressure.  A seat with too much area results in not enough sealing pressure.

[Briz]

Yeah; we realised that. Went down from a 4mm seat to a 2mm. Still flooded though!
The day the bike shipped, we received from Amal a pair of deep floats intended for pumped applications. I put them in the toolbox as we were loading the pallet. We'll try them when we get there.

[Briz]

Time to come out of hibernation!
We're definitely coming back this year, so with a heap of paying work out of the way, we dusted off the ol' BSA and got started on some fuelling mods.
Inspired by Generatorshovels setup a page or 2 back, we scrounged a junk Holley carb off a fellow rodder and got the floatbowl set up thus:



No leaks! pic shows it holding a steady 4psi.
Rigged up a clear tube off the feed manifold to see fuel level, looks like its just about perfect. Thought I'd see how much pressure the Holley float would take; turned on the pump and kept adjusting the regulator up to an unbelievable 12psi; level rose by 5-6mm but still held it steady. Impressed!



Couple more tweaks and we're ready for some testing.

[generatorshovel]

It's good to see someone willing to think outside the box, I'm glad the Holley mod worked for you too Briz 
Go crack a can 'o Bonneville whoopazz mate.
Tiny

[Scottie J]

Such an awesome build Briz.  I hope to someday have my Enfield half as cool as your Beezer.  Did you ever get the chance to dyno the bike?

[Briz]

Yeah Scottie...it was a disaster! Fuel everywhere!
We'll be trying again quite soon.
Tiny; you thought outside that box mate. We just copied a good idea!

[generatorshovel]

Tiny; you thought outside that box mate. We just copied a good idea!

I had a cardboard box, left it in the rain, it flopped, now everything is outside the box (living in an isolated area of OZ makes thinking mandatory)

[thefrenchowl]

Hi Briz,

Glad to see progress and ideas,

See you soon,

Patrick

[Briz]

Dyno session at Krazy Horse went well. Made 57HP and 72 ft-lbs torque. Only revved it to 5K, being gentle on the motor. Peaking early; turbo seems to run out of puff. Was making 12 psi of boost at 3500 rpm.
Gonna try a bigger turbo.
Only problem we had was way too much oil pressure going into the turbo. Got past the seals & made smoke at high rpm.

[thefrenchowl]

Hi Briz,

Old Harry Miller 20's trick to send just the smallest necessary amount of oil to a supercharger:  a long coil of small copper tube to lower the pump pressure by drag itself.

Patrick

[Briz]

We got the pressure sorted; the pressure release valve wouldn't open because of hydraulic lock; oil would get behind the piston and would stop it moving far enough. Took awhile to figure it out, the valve worked fine on compressed air!
Machined some flutes 3/4 of the way along the piston.

[Briz]

On the subject of oil....the engine oil rather than the turbo oil............
One thing that always bugged me was the fact that whether running here on the dyno or over on the salt, the oil is never up to running temperature when giving it full throttle for a hard pass.
Less of a problem running synthetic 5/40 or whatever, but Castrol R (or our Rock Oil equivalent) is like molasses when cold which isn't going to help circulation, and will load the oilpump bits.
So; I just bought one of these:
http://www.ebay.co.uk/itm/290998002590?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Stick it in the oil tank while waiting to run, or while its on the trailer en-route. Problem solved.....hopefully.

[fordboy628]

On the subject of oil....the engine oil rather than the turbo oil............
One thing that always bugged me was the fact that whether running here on the dyno or over on the salt, the oil is never up to running temperature when giving it full throttle for a hard pass.
Less of a problem running synthetic 5/40 or whatever, but Castrol R (or our Rock Oil equivalent) is like molasses when cold which isn't going to help circulation, and will load the oilpump bits.
So; I just bought one of these:
http://www.ebay.co.uk/itm/290998002590?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Stick it in the oil tank while waiting to run, or while its on the trailer en-route. Problem solved.....hopefully.

One of the things the Milwaukee Midget did last year was to utilize magnetic oil pan and diff heaters, unlike years past.

2013 unheated best run 118+ mph
2014    heated best run  126+ mph

Unfortunately, higher oil temps were not the only detail differences between '13 & '14, BUT, the little details added up because he broke the I/GT record.

If it was me, I'd pay attention to EVERY detail.

Just my 2 cents

Fordboy