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Author Topic: My '59 Enfield /Indian 750cc Chief High Compression Build  (Read 66337 times)
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Scottie J
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« 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 » Logged
Koncretekid
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« 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
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« 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
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Koncretekid
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« 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
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« 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 » Logged

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« 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.)
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MattGuzzetta
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« 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

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JimL
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« Reply #22 on: December 04, 2013, 08:44:25 PM »

Kimtab Snowflakes!  Maybe '71-'72 when those hit the market?  .....cant remember. undecided. 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 » Logged
Scottie J
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« Reply #23 on: December 04, 2013, 09:01:50 PM »

Kimtab Snowflakes!  Maybe '71-'72 when those hit the market?  .....cant remember. undecided


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
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« 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!
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Scottie J
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« 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 Subaru does it run good even when it is -4F.  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.



Scottie
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« 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
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Scottie J
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« 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
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« 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....
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MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.
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« Reply #29 on: December 05, 2013, 05:54:30 PM »

750cc class break
« Last Edit: December 05, 2013, 05:56:10 PM by SPARKY » Logged

Miss LIBERTY,  changing TKI  to noise, dust and RUST!!!

The # 1 issue is: TO KEEP THE REPUBLIC      
   Center for Self Governance            tncsg.org     mrspowell.org

"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
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