Author Topic: My '59 Enfield /Indian 750cc Chief High Compression Build  (Read 161219 times)

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Offline Scottie J

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #15 on: December 04, 2013, 04:35:12 PM »
Don Sliger was the guy who built the dual engine Interceptor.  He was the first man to break 200mph with an unstreamlined bike.  I believe he ran just over 203mph.  Also, are these lsr fairings available for sale or does one have to fabricate it themselves?

Scottie
« Last Edit: December 04, 2013, 04:37:43 PM by Scottie J »

Offline Koncretekid

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #16 on: December 04, 2013, 04:43:03 PM »
Scottie,
My bike is pretty slippery, and I've managed  a 143 mph record with 45 rear wheel hp.  Using the rule of cubes (required hp increases at the cube of the desired new speed), I calculate that I can go 200 mph with 123 hp.  And that requires everything to be perfect.  My bike is partially streamlined with a specially built long low frame and fairing.  I live in Lafayette, Colorado in the spring and fall, so I may be able to provide some help when I'm there.  As for my significant other, she knows exactly what I spend because she keeps the books!   I seem to be able to go thru 8 to 10K per year on upgrades (includes some other projects).  Otherwise, I just might try to find 123 hp, somehow. Hard to do with a single cylinder.  Learn to walk before you run.
Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Offline DND

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #17 on: December 04, 2013, 05:00:55 PM »
Hi Tom

How much power do you think a turbo 4 valve Thumper can make ?

G Don

Offline Koncretekid

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #18 on: December 04, 2013, 05:41:49 PM »
Hi Tom

How much power do you think a turbo 4 valve Thumper can make ?

G Don
Not to hijack Scottie's thread here, but I can't imagine more than 70 for the 500 before it blows.  And of course, the 4 valve head (Westlake?) that was made for a 441 BSA never achieved much success that I know of.  Anyway, turbocharging a single cylinder has not worked well in most cases, but a supercharger will.
Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Offline SPARKY

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #19 on: December 04, 2013, 05:52:50 PM »
Scottie J,  we got a 600 Suzuki PP to a little over 160 for a record, using several things that rules are now written against:
---I think you better be looking at A full fairing, & a LOT of NITRO or snoot full of NITROUS if you are looking to go + 2  ymmv
« Last Edit: December 04, 2013, 05:55:16 PM by SPARKY »
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!

Offline Stan Back

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #20 on: December 04, 2013, 06:19:55 PM »
Thanx, Scottie.

I had the Don, just not the Sliger.

Is that the bike in Reply #11?
(Been a long time.)
Past (Only) Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club" -- 19 Years of Bonneville and/or El Mirage Street Roadster Records

Offline MattGuzzetta

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #21 on: December 04, 2013, 06:55:17 PM »
This is Don Sliger from about 1970 methinks.  Should be from the time of the first 200mph run.
Enjoy!



Matt Guzzetta


Offline JimL

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #22 on: December 04, 2013, 08:44:25 PM »
Kimtab Snowflakes!  Maybe '71-'72 when those hit the market?  .....cant remember. :|. I recall the early ones didnt have the bead area quite right...but not sure of the year.

Oh well....
« Last Edit: December 04, 2013, 09:27:47 PM by JimL »

Offline Scottie J

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #23 on: December 04, 2013, 09:01:50 PM »
Kimtab Snowflakes!  Maybe '71-'72 when those hit the market?  .....cant remember. :|


The MK I Interceptor was introduced in 1963.  It was basically the upgraded 692cc punched +.040 with 92mm stroke making it a 736cc, it also had bigger camshafts.  In 1964 they introduced the MK II which was completely redesigned and boasted 60hp.  I'll actually be using a few of the MK I parts in my build like the camshafts and Hitchcocks 1 piece alloy cylinder.  And from what I'm told by Hitchcocks I'm the first person to mount the 1 piece alloy cylinder to a 692cc case.

Scottie

Offline Briz

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #24 on: December 05, 2013, 08:22:21 AM »
Phew! thats a pretty ambitious project you have there Scotty!
One thing though; I'm sure I remember that the big ol' crank was cast nodular iron rather than forged. Which is why its so massive. I thought the big-end journals were bigger than 45mm; Seem to remember 1.875".
But its a long time since I saw one apart.
Good luck!

Offline Scottie J

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #25 on: December 05, 2013, 11:57:32 AM »
I had a little fun last night.  I'm all jazzed up about building my '59 Chief that when I got home last night I fired up The Blackhawk (my '58 Trailblazer) and went and played in the snow for a bit.  It was a blast!  Tho I must say that is the heaviest bike I've ever man handled in the snow.  But holy shit does it run good even when it is -4°F.  The Blackhawk is essentially identical to the Chief, except the Blackhawk has 71mm bore and the Chief will be getting probably 72.5mm and dual carbs.

https://www.youtube.com/watch?v=pXY3VhAaLPo&feature=youtube_gdata

Scottie

Offline Koncretekid

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #26 on: December 05, 2013, 04:18:26 PM »
What class?  72.5mm bore by 92mm stroke equals 759.2 ccs.  If it was 71 mm stock, or even 71.5 stock, I think you're only allowed .5mm overbore at SCTA.  As far as I know, no overbore allowance at BUB's.
Tom
We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!

Offline Scottie J

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #27 on: December 05, 2013, 04:55:45 PM »
What class?  72.5mm bore by 92mm stroke equals 759.2 ccs.  If it was 71 mm stock, or even 71.5 stock, I think you're only allowed .5mm overbore at SCTA.  As far as I know, no overbore allowance at BUB's.
Tom

I don't have a rule book and I'm not at all familiar with the different classes.  My Chief will have a 90mm stroke, but no over boring?  What's up with that?

Scottie

Offline Stainless1

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #28 on: December 05, 2013, 05:53:22 PM »
72.5x90 is under 750 so you are good to run the 750 class... some of those records are slower than the 1000.... some not so much....
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline SPARKY

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Re: My '59 Enfield /Indian 750cc Chief High Compression Build
« Reply #29 on: December 05, 2013, 05:54:30 PM »
750cc class break
« Last Edit: December 05, 2013, 05:56:10 PM by SPARKY »
Miss LIBERTY,  changing T.K.I.  to noise, dust, rust, BLUE HATS & hopefully not scrap!!

"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

We are going to explore the racing N words NITROUS & NITRO!