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Top speed Big Twin Flatheads at Bonneville

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Paul Friebus

Posts: 17

Joined: Tue Apr 17, 2007 10:43 am

Location: BLOOMSBURG, PA

Post Sat Oct 23, 2010 5:34 pm

Top speed Big Twin Flatheads at Bonneville

BONNEVILLE WORLD FINALS (SCTA) - OCTOBER 2010

TWO Flatheads ran at over 151 mph !!!!!!!!!!!!!!!!!!! (it was a sight to see!!!)

Just back from the World Finals event at Bonneville Salt Flats. Paul raced his trusty 1937 BigTwin Flathead and.....................his fastest speed was a whopping 151.800mph. Still running naturally aspirated and running on fuel. He managed to keep this speed up for both runs down the track and set a record at 151.181mph.

The chief motor cycle tech , Tom Evans, kindly put a notation in Paul's log book saying that this is the fastest H.D. Flathead speed ever recorded at Bonneville. What a feather this is in our cap.

Once we had that record in the bag Paul rolled out the little 45 Flathead. This event her fastest speed was 108.707mph (the record we were chasing is 110mph). Paul hasn't been able to give her the tuning time that he has the BigTwin, so I'm sure that once she gets her fair share of dedication from Paul she will be able to make up the extra 2 mph that we need.

Both bikes, after cleaning and servicing, are still running strong and ready to do it again (the rider is chomping at the bit too I must add........)

David Pilgrim ,running his 1938 Harley Flathead TURBO, was gingerly turning up the boost as he gets everything syncronised on this puppy. Still not at full boost , his fastest 1 way speed was 151.571mph (and there's plenty more where that came from)! Setting his record at 150.402mph. Look out next year - stand back Hyabusas.......

It was a wonderful event. We fought the weather every single day (and won) with minimal delays. As David likes to say "No-one got hurt. Everything still runs. Doesn't get much better than that."

Thanks for all your support and enthusiasm. We hope to be able to do this for many years to come.
With kind regards
Paul & Barbara Friebus
http://www.americancyclefab.com
Ph:570-752-8715
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helsingborg

Posts: 76

Joined: Tue Jan 29, 2008 8:08 pm

Post Sat Oct 23, 2010 7:39 pm

Re: Top speed Big Twin Flatheads at Bonneville

Congratulations Paul and Barbara!!!!!!
WOW this flathead runs AMAZING! Any video on youtube?
Nice to hear from you.
Karl.
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Chris Haynes

Posts: 2602

Joined: Wed Jul 05, 2000 12:01 am

Location: Los Angeles, CA

Post Sat Oct 23, 2010 8:13 pm

Re: Top speed Big Twin Flatheads at Bonneville

The chief motor cycle tech , Tom Evans, kindly put a notation in Paul's log book saying that this is the fastest H.D. Flathead speed ever recorded at Bonneville. What a feather this is in our cap.

I believe that Tom once held the record you broke.
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George Greer

User avatar

Posts: 947

Joined: Wed Aug 28, 2002 12:01 am

Location: Markt Einersheim, Germany

Post Sat Oct 23, 2010 11:27 pm

Re: Top speed Big Twin Flatheads at Bonneville

That rocks!!

Congrats.....photos???

George
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Frankenstein

User avatar

Posts: 1531

Joined: Thu Jun 27, 2002 12:01 am

Location: Interlaken, NY USA

Post Sun Oct 24, 2010 7:58 am

Re: Top speed Big Twin Flatheads at Bonneville

Way To Go Paul and Team! Thanks for making Big Twin Flatheads a respected machine on the salt. I'm sure once you get that third carb on the 45 properly sync'd, the record will tumble! :lol: :lol:
Saw the 45 at Rhinebeck this year, great machine.
DD
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Lee W

Posts: 132

Joined: Sat Sep 23, 2006 8:58 pm

Location: Carver, MN

Post Sun Oct 24, 2010 7:48 pm

Re: Top speed Big Twin Flatheads at Bonneville

Paul, congratulations to you and your team! It takes a lot of work and dedication to seriously compete in any type of racing. Its great to see it paying off for you, especially since you are using the old iron that we all love.
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TURK

Posts: 27

Joined: Sun Aug 22, 2010 11:24 am

Post Sun Oct 24, 2010 9:25 pm

Re: Top speed Big Twin Flatheads at Bonneville

It was 1951 at Rosamond dry lake in california, The Pasadena Motorcycle Club held there " Speed Trials" In the 45" side valve class J. D. Walthall went 111.11 on an HD.---Turk
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TURK

Posts: 27

Joined: Sun Aug 22, 2010 11:24 am

Post Sun Oct 24, 2010 9:33 pm

Re: Top speed Big Twin Flatheads at Bonneville

Congradulations on your great achevment,as a racer I know the hard work and dedication necessary to break records. Being a flathead just makes more astounding. I have a 92" VLH I'm playing with, I want to beat my buddys twin cam 88 dont think I will but its all fun.---Turk
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45Brit

Posts: 1363

Joined: Tue Nov 27, 2007 2:29 am

Post Thu Oct 28, 2010 1:37 pm

Re: Top speed Big Twin Flatheads at Bonneville

what can I say? Vintage racing is HARD to do well....
Shoot, a man could have a good weekend in Dallas with all that stuff...
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Pa

Site Admin

Posts: 4478

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Thu Oct 28, 2010 4:16 pm

Re: Top speed Big Twin Flatheads at Bonneville

Congrats !!! I awe at such accomplishments. Pa
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Paul Friebus

Posts: 17

Joined: Tue Apr 17, 2007 10:43 am

Location: BLOOMSBURG, PA

Post Fri Oct 29, 2010 10:31 am

Re: Top speed Big Twin Flatheads at Bonneville

Thank-you very much indeed for all your good wishes. Someone asked for a photo. This is the 151.800 MPH Flattie. Regards Paul.
Attachments
2010 BONNEVILLE WORLD FINALS 041.jpg
2010 BONNEVILLE WORLD FINALS 041.jpg (167.53 KiB) Viewed 3266 times
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Paul Friebus

Posts: 17

Joined: Tue Apr 17, 2007 10:43 am

Location: BLOOMSBURG, PA

Post Fri Oct 29, 2010 11:05 am

Re: Top speed Big Twin Flatheads at Bonneville

And that 151.800 MPH Flattie - the view from the other side. Paul P.S. obviously that kick stand comes off before heading down the track!)
Attachments
2010 BONNEVILLE WORLD FINALS 071.jpg
2010 BONNEVILLE WORLD FINALS 071.jpg (170.88 KiB) Viewed 3262 times
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Paul Friebus

Posts: 17

Joined: Tue Apr 17, 2007 10:43 am

Location: BLOOMSBURG, PA

Post Fri Oct 29, 2010 11:18 am

Re: Top speed Big Twin Flatheads at Bonneville

This is the 45 that did 108MPH. We named it "Bruce". The reason being , Bruse Lindsay once told me that my handicap on a standard 45 is that the area between the bore & the exhaust valve is too large. So, after some brainstorming, we decided to install a 2" valve in the exhaust and take up some of that space. The results are what you see here. Motor runs great & revs to 7000RPM. Goes through the timed mile at 6000 to 6200RPM. You have to continually rev up the motor at the start line and at idle as it tends to pool the gas in the long intakes, due to low RPM, low velocity. Paul. http://www.americancyclefab.com
Attachments
2010 BONNEVILLE WORLD FINALS 042.jpg
2010 BONNEVILLE WORLD FINALS 042.jpg (165.8 KiB) Viewed 3238 times

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