INDIAN 741 Supercharged...See you in 2011

[SPARKY]

 

[octane]

Lars, You are the Prince of Denmark with the stoutness of that tune-up.
  Rocky
  1957S/VG

Let's just hope that the Prince of Denmark is not related to the Prince of Darkness (Lucas)!  Hope to see you at BUB.
Tom

He's a VERY distant cousin, so I don't worry about it

to you Sparky !

See ya'

[octane]

The start-up the other day was mostly to check all systems
before it goes on the dyno Monday morning.
The guy who runs it has the appropiate name "Speedy".
He knows his stuff. particularly old stuff; he runs a turbo-charged Norton.


One thing we checked was if the vacuum piston in the CV carb
actually did lift all the way up at WOT.
I would have been surprised if it didn't
what with the blower and all, but here's one nerdy video to show it: CLICK
( probably won't win me a most-seen-YouTube-video prize...ha ha

Took the heads off to check things.
basically it all good:
absolutely no trace of damage to the fine new copper gaskets...PHEW !
No damage to the piston tops.
One little problem:



...slight valve/head interference.
Fortunately the heads are made of marsmallowium.

AURGH ! You might recall that I DID check for clearance before
engine assembly.
The problem is that the diameter of the bolt-holes in the heads a quite considerably larger
than the diameter of the bolts , so the head can move about.
I really should have made some dowels ( is that the term ?) going
through the head / gasket / cylinder, to keep them in position.
Any way, I removed enough material so it won't happen again



There was a slight sign of bolt-lubrication 'sweating' around the bolt-holes
its way into between the gasket and the head/cylinder
so this time I painted the gaskets , both sides, with zinc paint
before assembly, as suggested by some good folks here.



This also gave me an oppotunity to position the gaskets perfecrly on the head
while the paint was wet. I let it dry for a while and the gaskets were thereby 'glued' to the heads.
I could then turn them around and position the heads on the cylinders
WITH the gaskets under them in the proper position.

Getting ready for the dyno-test.
Wish me luck
and have a brilliant weekend ya' all  !

[octane]

Dyno test result
WoooooooooooooooooHaaaaaaaaaaaaaaaaa!



Now that was interesting:
did all kinds of set-up, gas , gas/alcohol, pure alcohol,
ran it lowered boost; simply put a too-weak spring on the pop-up valve
so part of the gasses/boost leaked out...NOT the proper way...but heeey: rock'roll !

First surprise: the boost is beyond the wildest expectations: 1 bar / 14.5 psi plus.
Must have been running with a malfunctioning blower at Bonneville.
I could watch the intake-hose expanding like a fat man breathing when cranking up.
Something I did not experience at Bonneville last year.

Finally after a lot of fooling around da' little devil delivered close to 40 bph at the rear-wheel
running pure alcohol.
That of course is nothing by the standards of what most of you guys run,
but for a little 70 year old stone-age-technology flat-head that left the factory with probably
considerable less than 20 bph , it is a result beyond my wildest expectations.
Some interesting figures:
accelerating from 100 km/h to 150 km/h is done travelling just 180 meters
or from 62 mph to 93 mph is done travelling just 590 feet.

It didn't get too hot. Nothing broke. Nothing fell off.




Here's a video from when it still ran on gas making some 32 bph.
No Indians were harmed during this video-recording.

CLICK

Removed heads today: no damage whatsoever to the head-gaskets,
no pitting ( is that the word(?)) on top of piston...PHEW !
I think my gasket problems is a thing of the past.

Going back there tomorrow morning to fine-tune ignition and jetting.



.

[gearheadeh]

Nice videos, great work, looks like things are coming together for a fun time at B.ville this year!
I especially like this part: No Indians were harmed during this video-recording.

[ironwigwam]

It raises the bar to keep on track. Thanks Cool Bean lars. Is that Moen in the background?

[MC 1314]

Lars
Were any Danes harmed?

I still say you will do 130..mph not kph.
See ya in Pre-stage.
Bob

[ol38y]

That's great to hear Lars...    See ya in Sept. 

[twinspeed]

Nice topic Lars, and thanks for posting dyno results... Very interesting project you have, very interesting.

Fine-tuning probably yields few more horsepowers.

 

[twinspeed]

Forgot to ask, what were or are the RPM's in best power?

I saw only the speed... Do you know the exact RPM number or what is the estimation of these?

Absolutely fantastic idea that supercharged side valve Indian...

[SPARKY]

No indians were harmed---lol 

[saltwheels262]

it sounds good lars.
it's a good thing your 4 way flashers are working.
see ya when I see ya.

franey

[wobblywalrus]

Hi Lars.  This build shows a fellow with strong craftsmanship talent who is progressing to learn the tools and analytical skills of seasoned builders and racers.  The future looks good.

[octane]

It raises the bar to keep on track. Thanks Cool Bean lars. Is that Moen in the background?

Rocky: check your P.M.

Lars
Were any Danes harmed?

LOL.....nope

I still say you will do 130..mph not kph.

Naaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa...no way

See ya in Pre-stage.
Bob

Looking forward to see you Bob!
In my book, you as a volunteer working to make it all happen, makes you one of the heroes of Bonneville

That's great to hear Lars...    See ya in Sept.  

See ya !

Forgot to ask, what were or are the RPM's in best power?

I saw only the speed... Do you know the exact RPM number or what is the estimation of these?

We got the RPM readings fixed yesterday and as I remember it, the best power is around 4500 RPM

No indians were harmed---lol  

Cheers Sparky !

[octane]

it sounds good lars.
it's a good thing your 4 way flashers are working.
see ya when I see ya.

franey

See ya' Franey !