Author Topic: Landspeed record turbo Honda 998cc.  (Read 10447 times)

0 Members and 2 Guests are viewing this topic.

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Landspeed record turbo Honda 998cc.
« on: September 27, 2011, 12:21:12 PM »
Just rebuilt after 26 years in boxes my CB750K2 is back to it's original condition.
Performance in 1981.
Top speed 207 mph.
Flying quarter mile 198.98 mph.
FIM 1000cc World flying kilometer record ( 189.64 mph)
FIM 1000cc World flying mile record (181.51 mph on public road)
Irish Landspeed record ( flying kilo, 184.10 mph - public road.)

Built on a budget the frame is a Rob North design, by Piper, the original Peter Williams mag wheels from a works Norton,
Triumph Bonneville front forks, koni's on rear, Lockheed calipers with Renault discs, vertex mag with drive built by Phil Joy from VW beetle distributor gears, modified ATP turbo kit, fairing based on modified design of Garelli or Benelli 1950's dustbin, home built water/alcohol injection.

This bike gave lots of fun. Click for photos:      http:/www.filckr.com/photos/nitrous2000

Offline H2Eric

  • Hot Shot
  • ***
  • Posts: 349
Re: Landspeed record turbo Honda 998cc.
« Reply #1 on: September 27, 2011, 12:33:55 PM »
Were some of those records set at Elvington?
Bit of a snag with the link - it doesn't work. I also tried a copy and paste to the task bar, but just got the Flickr home page.

Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

http://forums.sohc4.net/index.php/topic,94588.0.html

Growing old is mandatory, growing up is optional.

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,262
  • Humboldt, AZ
Re: Landspeed record turbo Honda 998cc.
« Reply #2 on: September 27, 2011, 12:39:17 PM »
Dodger, make 4 more posts so you will be allowed to post links.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline rklystron

  • I have not failed. I've just found 10,000 ways that won't work. Thomas A. Edison
  • Hot Shot
  • ***
  • Posts: 257
Re: Landspeed record turbo Honda 998cc.
« Reply #3 on: September 27, 2011, 12:46:24 PM »
Dodger glad to see you made it here. Your link to the photos, is http://www.flickr.com/photos/nitrous2000. Cant wait to see your post on this.
Scott
1970 CB750 K0 (Bought in 73)
1972 XL250 (Bought new in 72)
1973 ST90 (Free)
1975 XL250 (Free)
1975 Rickman CR750
1982 CBX1000 Pro-link
1975 CB750 DRAG BIKE
1977 Custom Built CB750 Sturgis Bike (GL front end).
1977 CB750 F2 (Big Resto)
1977 CB750A (Auction Buy)
1978 CB750 K8 (My San Francisco ride)
1984 VFR750 (Bought New)

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,262
  • Humboldt, AZ
Re: Landspeed record turbo Honda 998cc.
« Reply #4 on: September 27, 2011, 12:51:36 PM »
"page not found"
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline rklystron

  • I have not failed. I've just found 10,000 ways that won't work. Thomas A. Edison
  • Hot Shot
  • ***
  • Posts: 257
Re: Landspeed record turbo Honda 998cc.
« Reply #5 on: September 27, 2011, 12:57:05 PM »
No period at the end of the link my bad.
1970 CB750 K0 (Bought in 73)
1972 XL250 (Bought new in 72)
1973 ST90 (Free)
1975 XL250 (Free)
1975 Rickman CR750
1982 CBX1000 Pro-link
1975 CB750 DRAG BIKE
1977 Custom Built CB750 Sturgis Bike (GL front end).
1977 CB750 F2 (Big Resto)
1977 CB750A (Auction Buy)
1978 CB750 K8 (My San Francisco ride)
1984 VFR750 (Bought New)

Offline rklystron

  • I have not failed. I've just found 10,000 ways that won't work. Thomas A. Edison
  • Hot Shot
  • ***
  • Posts: 257
Re: Landspeed record turbo Honda 998cc.
« Reply #6 on: September 27, 2011, 12:57:49 PM »
1970 CB750 K0 (Bought in 73)
1972 XL250 (Bought new in 72)
1973 ST90 (Free)
1975 XL250 (Free)
1975 Rickman CR750
1982 CBX1000 Pro-link
1975 CB750 DRAG BIKE
1977 Custom Built CB750 Sturgis Bike (GL front end).
1977 CB750 F2 (Big Resto)
1977 CB750A (Auction Buy)
1978 CB750 K8 (My San Francisco ride)
1984 VFR750 (Bought New)

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #7 on: September 27, 2011, 12:58:49 PM »
Yes, the Flying Kilo record was at Elvington, England in October 1981. The others were on the Carrigrohane Straight, on the edge of Cork City, Ireland, in  July 1981.

Try my best to fix the pics.

Good luck.

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,262
  • Humboldt, AZ
Re: Landspeed record turbo Honda 998cc.
« Reply #8 on: September 27, 2011, 01:01:50 PM »
http://www.flickr.com/photos/nitrous2000
That fixed it. Thanks.
Dodger, that is one fine looking bike!!!!!
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline rklystron

  • I have not failed. I've just found 10,000 ways that won't work. Thomas A. Edison
  • Hot Shot
  • ***
  • Posts: 257
Re: Landspeed record turbo Honda 998cc.
« Reply #9 on: September 27, 2011, 01:09:55 PM »
Dodger you mentioned that you were also using water and alcohol injection on you record setting bike. How and where did you inject? Did you have different injection ratios based on fuel as well as track conditions? If I understood you correctly, the main reason for the injection was due to Fuel Octane ratings being to low for your application? It's main purpose was to prevent pre-ignition and detonation? I imagine the cooling effects were also noticeable even though I have no experience with water injection. This is something I would like to consider on my next build. Thank you in advance.
1970 CB750 K0 (Bought in 73)
1972 XL250 (Bought new in 72)
1973 ST90 (Free)
1975 XL250 (Free)
1975 Rickman CR750
1982 CBX1000 Pro-link
1975 CB750 DRAG BIKE
1977 Custom Built CB750 Sturgis Bike (GL front end).
1977 CB750 F2 (Big Resto)
1977 CB750A (Auction Buy)
1978 CB750 K8 (My San Francisco ride)
1984 VFR750 (Bought New)

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #10 on: September 27, 2011, 01:15:12 PM »
Try for the pics on      http:/www.flickr.com/photos/nitrous2000/sets/

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #11 on: September 27, 2011, 01:22:35 PM »
Hi rklystrom,
The injection is well worth while if you are running long distances on boost. Even with today's racing fuels, I am sure that it will still help due to the cooling effect. I injected through the side of the front of the carb using a presurised tank, from the intake manifold and a pressure valve which can be set to come on at the required boost.

Offline NitroHunter

  • Radical Street / Strip Turbo
  • Hot Shot
  • ***
  • Posts: 711
  • A man's motorcycle is a reflection of the man
Re: Landspeed record turbo Honda 998cc.
« Reply #12 on: September 27, 2011, 01:38:11 PM »
Wow that's a clean looking machine. Very nice!
With a top speed of 207 what was the gearing, and how much boost did it take?
Robbie the NitroHunter                      Fuel Coupe Hired Gun                  NHRA T/F 640

DRAGBIKE USA XH/MB Recordholder: http://forums.sohc4.net/index.php?action=dlattach;topic=127179.0;attach=332735
DRAGBIKE USA XH/SS Recordholder: http://forums.sohc4.net/index.php?action=dlattach;topic=63940.0;attach=103300
Young mans glory days in the lanes: http://forums.sohc4.net/index.php?action=dlattach;topic=45685.0;attach=66341

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,902
  • Bought her new 4/75
Re: Landspeed record turbo Honda 998cc.
« Reply #13 on: September 27, 2011, 03:02:14 PM »
Will you be repeating the runs ??  ;)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline jaguar

  • Old Timer
  • ******
  • Posts: 2,763
Re: Landspeed record turbo Honda 998cc.
« Reply #14 on: September 27, 2011, 05:17:12 PM »
200+ mph sohc4?
wow!

i want more details and specs

Offline orkid1989

  • Hot Shot
  • ***
  • Posts: 344
  • “Life is too important to be taken seriously.”
Re: Landspeed record turbo Honda 998cc.
« Reply #15 on: September 27, 2011, 05:36:13 PM »
wow awesome bike!
“Experience is the name every one gives to their mistakes.” Oscar Wilde

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,809
  • Saver of unloved motorcycles.
Re: Landspeed record turbo Honda 998cc.
« Reply #16 on: September 27, 2011, 06:03:51 PM »
Very cool. I'm green with envy.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline BobbyR

  • Really Old Timer ...
  • *******
  • Posts: 12,367
  • Proud Owner of the Babe Thread & Dirty Old Man
Re: Landspeed record turbo Honda 998cc.
« Reply #17 on: September 27, 2011, 07:07:45 PM »
You are my Hero. Nice work!!!!
Dedicated to Sgt. Howard Bruckner 1950 - 1969. KIA LONG KHANH.

But we were boys, and boys will be boys, and so they will. To us, everything was dangerous, but what of that? Had we not been made to live forever?

Offline scottly

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,262
  • Humboldt, AZ
Re: Landspeed record turbo Honda 998cc.
« Reply #18 on: September 27, 2011, 07:28:54 PM »
One more post, Dodger, and then the anti-spam restrictions will be over. Just something short, anything at all, even a period. ;)
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: Landspeed record turbo Honda 998cc.
« Reply #19 on: September 27, 2011, 10:51:00 PM »
Well done Mel, glad you made it, was it around April when you first tried. ;D ;D ;D
Enjoy your stay, you're Bobbies hero allready. ;D ;D ;D ;D ;D ;D ;D

Sam. ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #20 on: September 28, 2011, 10:33:05 AM »
Hi Nitrohunter,

The gearing was 17/32 with an 18" rear wheel and a 150 Dunlop racing slick. Theoretically this was to give 209 mph @ 9000 rpm It ran 207mph at somewhere around 9000 ( don't know exactly as I was too interested in where I was going and the needle was bouncing). No Racepak then. Boost was 15 psi. That was the max that it would go at long distance without detonation.

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #21 on: September 28, 2011, 11:15:58 AM »
Hi Jerry,

Apart from up the road for fun, no plans to run it again at present. It feels just as good as ever though.

Good luck


Offline Sam Green Racing

  • Moderator
  • Really Old Timer ...
  • *****
  • Posts: 16,068
  • I REALLY? hate black rims.
Re: Landspeed record turbo Honda 998cc.
« Reply #22 on: September 28, 2011, 11:33:41 AM »
Here is a list of records  ;)
C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Dodger

  • Full Member
  • *
  • Posts: 13
Re: Landspeed record turbo Honda 998cc.
« Reply #23 on: September 28, 2011, 11:49:15 AM »
Hi Jaguar,

I have run the bike in many differn't specs. Started off with it as my road bike, with lights and a half fairing. Ran it normally aspirated in 750 form. Used it in sprints and made 152 mph (at 12,000 rpm - not to be recommended for long) with a piper race cam and exhaust and the head polished ( 28mm carbs, as far as I remember) 12.1 compression.

Then I took it up to 998 cc ( new pistons and liners, using a 750 block bored out and the crankcases bored to match). 2mm oversize stainless inlet valves were installed ( standard exhaust valves), S&S race valve springs and the head flowed to match.

Result, 161mph with the half fairing at the end of a kilometer. Used the bike in this form for 2 road races and then sat on a wall to watch Irish landspeed records being set by Danny Keany, OWOI 750cc works Yamaha ( 167 mph) and by Vivian Candy in an Arrows F1 car ( 169 mph).

Felt that I could do better than that and then got serious.

The concept was to keep the weight down, have very efficient streamlining and produce more firepower than anything else running in my country at the time and run it all on a low budget. The only way to go was turbo (modified ATP Rajay FF40) and why not add nitrous for good luck as well? ( In reality the nitrous never worked out. At about 190mph I used to hit the button but the clutch always slipped. A 2 extra plate racing clutch, the best available then, was used but, no good with the nitrous. A nice lock up would have been the thing to have but, not available then.

The streamlining proved efficient and it ran 165 - 166 with no boost ( about 80 BHP). Compression 9:1.

I will post some shots of the internals and the mechanics in the near future. If you have specific questions - just ask.

Good luck.

Offline H2Eric

  • Hot Shot
  • ***
  • Posts: 349
Re: Landspeed record turbo Honda 998cc.
« Reply #24 on: September 29, 2011, 07:00:54 AM »
Hi Jerry,

Apart from up the road for fun, no plans to run it again at present. It feels just as good as ever though.

Good luck



Careful Mel, you'll be getting the bug again, Oh, I do hope so. Perchance you might like to join Straightliners / UK Landspeed Racing Association at Elvington for one of the top speed days. You would be very welcome.

Cheers
Eric
Honda CR750
Honda CB750K3
Kawasaki 750H2B
Suzuki GS750
Honda CB175
Honda CB350F
Yamaha R1

http://forums.sohc4.net/index.php/topic,94588.0.html

Growing old is mandatory, growing up is optional.