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Old 11-12-2013, 10:52 PM   #261
JAWS
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Default Re: Blown 45 build

Here's a Super B with a mod....

Ask Jesse_in_NY about it.
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Old 11-12-2013, 11:01 PM   #262
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Default Re: Blown 45 build

Quote:
Originally Posted by thefrenchowl View Post
Hi Elfors, Jaws...

Can't really say I designed the bike with another carb 1st.

What happened was I got that carb as a gas carb on a 74 ci 1967 CH engine... Way too big for the bike so it ended up on the shelves for a long while...

Then I acquired an XLRTT, same again, 74ci, but with huge domed Dytch pistons. Wouldn't rev past 2000rpm on gas... So decided to mod the carb to methanol, n.a.

That took about 5 years to set up, not cause I'm an idiot, just that I did not use the bike that much cause of work loads, maybe 2 or 3 times a year...

Eventually, got fed up of the methanol palava on the XLRTT, castor oil, flushing oil... Put it back to std with a 38mm race Tilly fed with regular gas.

Big carb back on the shelves until I decided to build the Bonneville bike. When I received the Ansin AMR500 supercharger, the ports did impress me, about 2" x 2" square... seemed to be asking for a big carb to hand out there...

MGAL off the shelves and on the bike...

Patrick
Where is this hot rod XLRTT? Did you do a thread on it. I would love to know more..How much compression, cams and such? Got a sound bite maybe or a vid?

Um, that's a big charger.....How big a mill is this going on? When can I ride it?!!!
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"In short, if you have engineering experience and are cautious and sensible they're fun and look great, if you're lazy and stupid, throw them on the bike and go for a ride you'll be dead the same day." -=JL=
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Old 11-13-2013, 03:26 AM   #263
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Default Re: Blown 45 build

OK, Jaws, I'll start sommat...

Patrick
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Old 11-17-2013, 02:02 PM   #264
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Default Re: Blown 45 build

Been doing an resto to my SU carb.
It was pretty worn, but i got it for nothing out of an box of junk at an mgb specialist dealer.
But even when i crank it wide open there aren't enough vacuumsignal to lift the "piston" in the bell. Even though the piston runs freely in it's bore. got to work on that.

Brought the camera along today and got some snaspshots of various things
The new brake pedal:
An shot of how low this thing actually is! thats about the height of my knee.
Chain clearance:
And carb


Been

Last edited by Elffors; 11-17-2013 at 02:13 PM.
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Old 11-17-2013, 02:39 PM   #265
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Default Re: Blown 45 build

is there the possibility you'll have to make a "snaps" nossle between blower and carb?? to get the fuel for the engine to spark and draw it's own juice?? looks great

//Janne
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Old 11-17-2013, 02:41 PM   #266
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Default Re: Blown 45 build

and maybe softer spring for the throttle piston??
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Old 11-17-2013, 03:11 PM   #267
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Default Re: Blown 45 build

Never heard about an snapsing device, but i haven't heard much about anything at all.

It's been sweating horsepower (oil) all over my bikestand for the last year so there where trouble getting an healthy kick while looking for a rise in the piston. the rear end where skidding around in the sweat.

A friend at work was having trouble with this to, on his Su carbed shovel unless it where held wide open to.
He was given the advice to run the piston bell dry cause it wasn't enough vacuum created by kicking to overcome the added resistence of oil(??).
The piston decided to seize at an cross road many miles from home..

I lubed it with 5-56 don't know if it's widely known but it's equivalent to WD40.
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Old 11-17-2013, 03:21 PM   #268
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Default Re: Blown 45 build

i ran without oil in my carbs on my amazon just to get quicker response

the snappsing thing was just a suggestion,a one way nipple to inject fuel via an external bottle or something,just to get it to run on it's own
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Old 11-17-2013, 03:53 PM   #269
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Default Re: Blown 45 build

Quote:
Elffors: I lubed it with 5-56 don't know if it's widely known but it's equivalent to WD40
Yep, as fluid as you can...

Try also different volumes in the dash pot until you find which quantity works best...

To start with, when it's not really tuned up yet, I would find a friend with starting rollers, or a tow car/bike... That should give enough revs to start it then heat up.

Patrick
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Old 11-17-2013, 04:15 PM   #270
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Default Re: Blown 45 build

I have seen "primers" or snaps on early bigtwin flatties. Most are right next to the plug.

I think a guy could make one up with a small tube/pipe and threaded cap. Or possible "t" in the fuel line, a shutoff and some small nipples in the intake right before the ports. Could even use an automotive fuel jet in the fuel line after the shutoff to help regulate/tune the fuel for priming.
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The police never think it's as funny as I do....

ROLLING DEATH

"In short, if you have engineering experience and are cautious and sensible they're fun and look great, if you're lazy and stupid, throw them on the bike and go for a ride you'll be dead the same day." -=JL=
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Old 11-28-2013, 12:46 AM   #271
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Default Re: Blown 45 build

Made an extra safty device last night.
It will be nice to not blow my leg of in case of a serious backfire.
It clogged up the look of the pop up valve but function will triumph over looks this time



Quote:
Originally Posted by JAWS View Post
I have seen "primers" or snaps on early bigtwin flatties. Most are right next to the plug.

I think a guy could make one up with a small tube/pipe and threaded cap. Or possible "t" in the fuel line, a shutoff and some small nipples in the intake right before the ports. Could even use an automotive fuel jet in the fuel line after the shutoff to help regulate/tune the fuel for priming.
This will be one of the first things i will dig in to if it won't fire. Have also heard that drawthrough set ups doesn't like low temperatures. My shop has 35f like temperatures at this time of year. Have to crank that up too.
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Old 11-29-2013, 01:26 PM   #272
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Default Re: Blown 45 build

I love this bike, do you have any more pics of how you shortened the SC? It would be cool to see how you did it.

Cheers Dan.
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Old 11-29-2013, 02:01 PM   #273
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Default Re: Blown 45 build

Quote:
Originally Posted by Elffors View Post
Made an extra safty device last night.
It will be nice to not blow my leg of in case of a serious backfire.
It clogged up the look of the pop up valve but function will triumph over looks this time





This will be one of the first things i will dig in to if it won't fire. Have also heard that drawthrough set ups doesn't like low temperatures. My shop has 35f like temperatures at this time of year. Have to crank that up too.

Change of molecular state when the fuel is mixing with air and atomizing.
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The police never think it's as funny as I do....

ROLLING DEATH

"In short, if you have engineering experience and are cautious and sensible they're fun and look great, if you're lazy and stupid, throw them on the bike and go for a ride you'll be dead the same day." -=JL=
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Old 11-29-2013, 03:22 PM   #274
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Default Re: Blown 45 build

Damnit Jon, I really have to see the progress in person! Too bad it´s a 800km one way drive...
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Old 11-29-2013, 06:21 PM   #275
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Default Re: Blown 45 build

That's really nice!
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Old 12-05-2013, 01:30 PM   #276
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Default Re: Blown 45 build

Took the clutch apart..
Heard the very familiar sound of an ballbearing ball, bounching of an messy concrete floor into the twillight zone with jimmy hoffa and a million missing socks.

So my question to you guy's should there be an ball between the clutch adjusting screw and the clutch rod?
or can i stop looking for it now, it's getting kinda boring and cold on the knees..


Anyhow, Have been trying to get some surface treatment to all the fabricated parts before final assembly.

At work we can blackoxidize stuff small enough to fit in an bucket. Great look and it doesn't flake off or scratch but it isn't very rust resistant... Ohh well, everything will be covered in chainlubricant anyhow!

Thanxs jj for fixing the forum again. I have'nt been able to post in aprox 6 days.
Multiquoting still doesn't work.

Last edited by Elffors; 12-05-2013 at 01:59 PM.
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Old 12-05-2013, 02:41 PM   #277
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Default Re: Blown 45 build

I looked into the magic papers, but i couldn't really find anything.
Does this help?



Your build is far out! Always helped me to keep the faith
when i was at a dead end with mine. Can't wait till you can fire it up!

I have parkerized a bicycle frame a few years ago,
with parkerizing solution from the gun shop.
It was treated with bees wqx and black pigment afterwards
and it is rust free to this day! And it looks great.

Now back to your build....
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Old 12-05-2013, 06:18 PM   #278
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Default Re: Blown 45 build

gonna keep an eye on this one
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Old 12-06-2013, 01:43 PM   #279
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Default Re: Blown 45 build

glad to see the continued progress on an awesome project, can't wait to see an end result, keep at it
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Old 12-06-2013, 02:03 PM   #280
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Default Re: Blown 45 build

Quote:
Originally Posted by Cpt.Fred View Post
I looked into the magic papers, but i couldn't really find anything.
Does this help?



Your build is far out! Always helped me to keep the faith
when i was at a dead end with mine. Can't wait till you can fire it up!

I have parkerized a bicycle frame a few years ago,
with parkerizing solution from the gun shop.
It was treated with bees wqx and black pigment afterwards
and it is rust free to this day! And it looks great.

Now back to your build....
Thanxs! My bike is an 42 wlc too. I had it in an bobberish version of this bike earlier and i remember when it started for the first time, it was real sweeeeeeeeet!!

it was just like this:
Riding on my road was just like this:
Couldn't hold it wide open into the corner cause of loose gravel.. chicken. It makes funny noises when im off trottle
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