Landracing Forum Home
November 23, 2017, 07:57:55 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: 1 2 3 4 5 6 7 [8] 9   Go Down
  Print  
Author Topic: 500cc pushrod bike project  (Read 30862 times)
0 Members and 1 Guest are viewing this topic.
oz
Sr. Member
****
Offline Offline

Age: 53
Location: Leighton Buzzard GB
Posts: 587


Geordie Power.




Ignore
« Reply #105 on: July 09, 2009, 11:38:32 AM »

Shame you aint going to make it this year I would have liked to see you there! What a fantastic Idea with the two engines though.
Logged

Newcastle born and bred a City built on Coal and Steel and a people built of stronger stuff
JimL
Sr. Member
****
Offline Offline

Age: 71
Location: Sutherlin, Oregon
Posts: 739





Ignore
« Reply #106 on: July 16, 2009, 11:09:50 PM »

The good news, is that the engine is running strong (after some dumb wiring mistakes were fixed), and I've run the rear wheel up to 125 or so on the stand (about 9000 RPM / 5th gear, with this gearing).  The chain seems to run very smooth and true... in fact, we were all standing around trying to figure out why. 

It certainly wasn't what I expected.  My best guess is that there is so much chain running straight, that it tends to stay in line because of all the inertia (it looks kinda weird...running like a belt, not a chain).  I tried pulling hard rear brake, against 5th gear at almost full throttle...couldn't hold it, but the chain just kept humming along straight, both top and bottom runs?!

Anybody got a better guess? 

Baffled, JimL
Logged
theazoldcrow
Sr. Member
****
Offline Offline

Location: Mammoth, Az. Where the sun shines daily!
Posts: 820


Yup!




Ignore
« Reply #107 on: July 17, 2009, 09:09:19 AM »

 grin  If it works,,,,,don't fix it!    Go fast, and go safe!   Crow
Logged

The Earth, is an intergalactic insane asylum.!
JimL
Sr. Member
****
Offline Offline

Age: 71
Location: Sutherlin, Oregon
Posts: 739





Ignore
« Reply #108 on: August 01, 2009, 11:06:32 PM »

Test rode today....runs pretty good....but very hard to maneuver at low speed with only 15 degrees of steering and a very long wheel base (can't turn around in a large 4-way intersection!)  Going straight is a piece of cake; great steering response and tracking perfectly (thanks "BLUE"....I followed your directions for rake and trail, and it works).  Pretty exciting under power....I actually had a beer after the ride, just to calm the hands a little, ya' know (my 2nd beer this year, actually.) cheers

Trying to finish the mold for the tail section....might get this bike to Speedweek.  Just "body work" and "paint work" left to do.  We'll see what happens over the next few days.  This one means something to me, as it's exactly 40 years from my first Bonneville, also on a 500cc class Honda (which was also an APS class bike.)

Regards, JimL
Logged
oz
Sr. Member
****
Offline Offline

Age: 53
Location: Leighton Buzzard GB
Posts: 587


Geordie Power.




Ignore
« Reply #109 on: August 02, 2009, 04:30:15 AM »

Good on ya Jim hope to see ya there!!
Get a wriggle on its 4 and a bit days to go.
Logged

Newcastle born and bred a City built on Coal and Steel and a people built of stronger stuff
JimL
Sr. Member
****
Offline Offline

Age: 71
Location: Sutherlin, Oregon
Posts: 739





Ignore
« Reply #110 on: August 07, 2009, 01:26:19 AM »

It's on Richard Reeds old sprint car trailer.....a friend is towing it out in the morning.  I'll be about 6 hours behind.

The first pic below is my "quickie" tailpiece mold.  Hot glue and foam-board, sprayed inside with Poly-Vinyl-Alcohol, then shot gel coat, and then hand layup.  Not great corners....big hurry...but fits perfect.  The pic from the right rear shows my clear Lexan knee shield, to keep from banging my knee on the fairing mount bar as I fold myself into position.  Numbers and all still to do....never have gone with a completely ready racer, somehow.  This bike is number 1581 (my 1969 Speedweek bike was 158, thanks Chuck K for getting me the appropriate number!)

Best wishes and safe travel to everyone.  It will be GREAT to see everyone again.

JimL


* DSC07047x.jpg (65.54 KB, 1280x960 - viewed 224 times.)

* DSC07058x.jpg (79.43 KB, 1280x960 - viewed 216 times.)

* DSC07062x.jpg (81.88 KB, 1280x960 - viewed 265 times.)
Logged
JimL
Sr. Member
****
Offline Offline

Age: 71
Location: Sutherlin, Oregon
Posts: 739





Ignore
« Reply #111 on: August 11, 2009, 07:18:13 PM »

This can be the end of this thread, since the drive worked fine and the bike went well despite a hurt cylinder before the event (had a stuck thermostat and the rear cylinder firing late while trying to run the engine in the shop). 

I ran both runs short (shutting off at the 2 to get out of the way since it was misfiring).  The bike raised the record from 111 to 123, so I guess I'll fix the engine and try to do better next year.  My last past was 124.9 and still accelerating.

Thank you to all the comments and hints over the last year.  I believe this will be a fun racer in the years to come, and the engine certainly has a lot more power in it once I get good pistons, and fix the carb issues.  The mouths of the velocity stacks were drawing off each other at speed....my left knee got gas on it on both runs, and there was a little white cloud hanging there in front of the stacks...spooky!  It was another one of those "ran out of time deals" and I tried to get by with stock parts.

Big thanks to all the course workers, officials, staff, and inspectors....I had a wonderful time.  Here's a pic of Drew measuring my engine for the record.

Regards, JimL


* DSC07067x.jpg (75.61 KB, 1280x960 - viewed 288 times.)
Logged
4-barrel Mike
Hero Member
*****
Offline Offline

Age: 69
Location: Portland, OR
Posts: 2784


Any fool can drive a V8




Ignore
« Reply #112 on: August 11, 2009, 07:21:51 PM »

Wow!  Well done!   cheers
Logged

Mike Kelly - PROUD owner of the V4F that powered the #1931 VGC to a 82.803 mph record in 2008!
Peter Jack
Hero Member
*****
Offline Offline

Age: 74
Location: Calgary, Alberta
Posts: 3444





Ignore
« Reply #113 on: August 11, 2009, 08:33:07 PM »

Congratulations JimL! It's great to see a project that we've been following end in success. Why not continue the thread showing how you solve the current problems and the further modifications you make to increase your speed. If you do I'm sure we'll continue to follow.

Pete
Logged
wobblywalrus
Hero Member
*****
Offline Offline

Age: 64
Location: backwoods Oregon
Posts: 4445





Ignore
« Reply #114 on: August 11, 2009, 11:37:52 PM »

That"s a well deserved record obtained the hard way.  Good job.
Logged
Nortonist 592
Hero Member
*****
Offline Offline

Location: Riverside CA.
Posts: 1496



WWW

Ignore
« Reply #115 on: August 12, 2009, 12:25:40 AM »

Congratulations Jim!!    Stout runs.

Logged

Get off the stove Grandad.  You're too old to be riding the range.
Rchop
Sr. Member
****
Offline Offline

Age: 63
Location: Murphysboro, Illinois
Posts: 605



WWW

Ignore
« Reply #116 on: August 12, 2009, 07:25:53 AM »

Congrats on the record Jim, hope to see you there next year  cheers
Logged

Each unexpected discovery is first ridiculed, then objected to and finally considered self evident
www.frsengineering.com
#4836 A-PBF 750cc(complete)
#765 A/G 650cc
JimL
Sr. Member
****
Offline Offline

Age: 71
Location: Sutherlin, Oregon
Posts: 739





Ignore
« Reply #117 on: August 13, 2009, 10:34:56 PM »

thanks fellows....I'm looking forward to tearing down and seeing what I've got to work with.  I also have 674cc engines on hand, and would like a shot at the 750 record.  I'm going to rework the frame a little, for quicker engine swaps. 

I'll post a little after the project gets going again.  Right now it's time to pay the penalty for taking a couple days off!
Regards, JimL
Logged
fredvance
Hero Member
*****
Offline Offline

Age: 74
Location: Bulverde TX
Posts: 2297



WWW

Ignore
« Reply #118 on: August 13, 2009, 10:40:00 PM »

Congratulations Jim great job. Sorry we didnt run into each other on the salt.

  Fred
Logged

WORLDS FASTEST PRODUCTION MOTORCYCLE 213.470
Vance&Forstall Racing
WOS 2011 235+MPH
Engine by Knecum, Tuned by Johnny Cheese.
Sponsers Catalyst Composites, Johnny Cheese Perf, Knecum Racing Engines, Murray Headers, Carpenter Racing
Rchop
Sr. Member
****
Offline Offline

Age: 63
Location: Murphysboro, Illinois
Posts: 605



WWW

Ignore
« Reply #119 on: August 14, 2009, 03:22:02 PM »

  I also have 674cc engines on hand, and would like a shot at the 750 record.

Jim I have a set of 38mm Lectron carbs that were used to set the current APS-PG 750 record. Let me know when you start building your motor for the 750 class, I will let you borrow them.

Randy
« Last Edit: August 14, 2009, 06:05:14 PM by Rchop » Logged

Each unexpected discovery is first ridiculed, then objected to and finally considered self evident
www.frsengineering.com
#4836 A-PBF 750cc(complete)
#765 A/G 650cc
Pages: 1 2 3 4 5 6 7 [8] 9   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page November 06, 2017, 04:09:52 AM