how good is a judson in a barndoor ?

barnjunkie

Hi all
I would like to know from fellow bd drivers with original 30/36hp
engines, How slow are they ?
and if you've driven a barndoor with a judson how did this compare to a
stock engine ?
Top speeds with judson ?

cheers

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BUCIOBATISTI

EverettB · Posted: Thu Sep 01, 2005 1:22 pm Post subject:

I can't comment on the Judson but my bone-stock '55 Kombi did 50-55 mph with no problems. Acceleration was a bit slow but once you got up to 55 mph, there were no problems maintaining that, even up most gradual hills.
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busracer · Samba Member Joined: January 24, 2002 Posts: 725

judsons run hot. all that friction.

why dont you fork out 6500 for one of mr okrasas no okrasa parts whirlwind 36 horse SHORT blocks and smoke some 1835s!

BUCIOBATISTI · Posted: Thu Sep 01, 2005 2:08 pm Post subject:

camerod · Posted: Thu Sep 01, 2005 6:58 pm Post subject:

my okrasa powered kombi(1300 tsv) still had less power than a 1600 single port bus...maybe not less RPM HP but for sure less torque which is what you really need in a bus anyway!
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barnjunkie · Posted: Fri Sep 02, 2005 2:50 am Post subject:

Thanks guys but I fogot to mention
the bus will not have reduction boxes/gears
it will be a 36hp beetle box will this make it worse ??

Cheers
Barnjunkie
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Luca Brasi's got nothing on me

54 rhd Judson super narrowed

BDM Wannabe

John Moxon · Posted: Fri Sep 02, 2005 4:59 am Post subject:

I'd forget about top speed with a Judson...it's the first thing people ask and really it's the least important.

The things you really need to know is that it give a really useful boost in torque meaning you don't slow to a crawl on anything but the steepest of hills.

Issues that exist with later splitties like cutting the engine bay ceiling to fit the air cleaner doesn't affect a Barndoor...lots of room.

As for running hot, well they run hotter but not enough to get the green light flickering. Ducting air from the vents onto the blower casing will keep things cool. If you have a good Judson you're not going to be bothered with overheating.

If Judsons cremate engines like some people think, they wouldn't have shifted over 70,000 units in their day.

Ask Julian Hunt if he misses his Judson on his '52 panel?
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barnjunkie · Posted: Fri Sep 02, 2005 7:57 am Post subject:

Hi John
the top speed will tell me how much the bus will gain
I know about what a judson charger will do on a bug

If I'm traveling long distances and cruising at 50mph without a charger
Its a little too slow for my liking only because I think its unsafe on
modern roads

but if I cruise at 60/65mph then thats exceptable

so if in a bug top speed was 80 something mph and I was traveling
at 65/70mph I know there is more power left

I just need to know what extra I would get in a bus

cheers for the input more please

Trevor
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Luca Brasi's got nothing on me

54 rhd Judson super narrowed

BDM Wannabe

John Moxon · Posted: Fri Sep 02, 2005 8:51 am Post subject:

Ahh, I didn't know you had a Barndoor Trevor...thought "barnjunkie" was a Judson virgin Laughing

I know you know all about Judsons on bugs. We have a few on the Register with Barndoors so if you give me an email address that doesn't keep bouncing (can't get through on the heidelberg one) I'll give you a couple of contacts.

Cheers
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EvilBus · Posted: Fri Sep 02, 2005 9:29 am Post subject:

I can comment on this, since I have one. The gearing in mine is stock and so unless you want to wind it out (Which I don't) you're still 55MPH tops. Since putting mine on
there's faster acceleration and the sound is definitely sweet to listen too. I was going up and down the hills in Eureka Springs last weekend with no problems.

I've had the inside of the housing honed and ceramic coated and polished. The outside was powdercoated. The only problem I had was clearance for the original style crank style rear pulley nut.

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EvilBus · Posted: Fri Sep 02, 2005 9:38 am Post subject:

John Moxon · Posted: Fri Sep 02, 2005 9:45 am Post subject:

DaveM · Posted: Fri Sep 02, 2005 9:46 am Post subject:

I just want to know why the license light wire is blue? Twisted Evil

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Ragman · Posted: Fri Sep 02, 2005 10:04 am Post subject:

As you all probalby know, the top speed would still be quite limited to the tranny. If you really want to increase your top end speed, you'll need to address the tranny as well as the engine.

EvilBus · Posted: Fri Sep 02, 2005 10:24 am Post subject:

barnjunkie · Posted: Fri Sep 02, 2005 3:34 pm Post subject:

barnjunkie · Posted: Fri Sep 02, 2005 3:42 pm Post subject:

EvilBus · Posted: Fri Sep 02, 2005 4:08 pm Post subject:

Well, that post didn't work. I'll try again.

There's lots of barndoors with straight axle setups and even some with later style reduction gears. To get to your original question, I think that a straight axle with a 36HP judson may work but I think it may be labored a bit. You may want to think of a larger power plant or if you want to still run a Judson there's a bit of work in setting up a 40HP judson on a 1600.

The later reduction boxes allow busses to go quite well in the 60-70MPH.
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John Moxon · Posted: Sun Sep 04, 2005 8:17 am Post subject:


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