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  1. Craighell

    Aluminum arc thermal expansion

    Thanks for the answer. That helps. The piston thing? I learned that at a much younger age. Heated a piston in the same oven as my freshly painted cylinder for my dirt bike. I wanted to see how much it actually grew when heated to 550 deg F. I found out. It also wasn't round when cooled...
  2. Craighell

    Aluminum arc thermal expansion

    This may be easy for some of you, but I have a question regarding a peice made from aluminum and what happens as a result of thermal expansion. The part is machined from stock and is approx 6" X 2.5" x40" It is also cut in an arc. It is the radius of a 40" circle. If specified to be machined...
  3. Craighell

    Dyno Cell Active Noise Control

    Hi guys, Does someone actually make/sell such a computer/board? The reason I ask is because there are many papers but, to build such a device including programming the processor and hoping I don't goof the matchs, and building up the breadboard, then creating the amp/speaker systems sounds...
  4. Craighell

    Dyno Cell Active Noise Control

    OK, so here’s my goofy idea. I need to reduce noise in a dyno room. The machines will not have to be completely quiet. Just MORE quiet than they are now. The worst part of dyno tuning is the step and hold testing where engines are held at constant rpm regardless of load. The dyno will...
  5. Craighell

    Buells anyone?

    Less vibration above 3K than my GSX-R1000. Buell's uniplanar engine mounting system works well. Shakes a great deal at idle but not once the engine spins up to usable rpm. I could go 112 hour days with my wife. Infact she likes the Buell better than the 'Busa for sport touring. Expect about...
  6. Craighell

    Buells anyone?

    As a Buell owner I can tell you the following: vailability of reasonably priced parts. I know aftermarkets are few and far between. Stock parts are chesp. Import dealers almost never price at retail. At the shop I worked we marked up retail 3x. Harley Buell parts are usually retail. i.e...
  7. Craighell

    Tuning motorcycle carburettors

    14.7:1 is stoichiometric (meaning scientifically correct) but peak power never occurs there, as combustion chambers in almost every engine require more fuel for peak power. Tune an engine for 13.5:1 and measure the torque then lean out fuelling to 14:7:1 and check the power. You will see a...
  8. Craighell

    Tuning motorcycle carburettors

    The dyno should have at least a wideband O2 sensor to sniff exhaust gas during the run. The carbs should be synced prior to showing up at the dyno. It should also have a good and properly operating ignition system. If you can be fairly certain your cylinders are all breathing and firing in a...
  9. Craighell

    Dyno Installation

    Also check out this page: http://www.stahlheaders.com/Lit_measurement_1.htm
  10. Craighell

    208 three pase to 220 two phase convert

    Thanks for the suggestions guys, What happened is that two legs of the 208 failed operate correctly. A buck boost was installed an used two phases of the 208 feeding the buck boost. Still failed to operate correctly. When used with a single leg of the 208 and neutral to the input of the buck...
  11. Craighell

    208 three pase to 220 two phase convert

    Please excuse my ignorance, but I need to convert a three phase 208 building to operate a system that requires 220vac. Back ground: I understand that 220 vac in the USA operates two 110 leads 180 degrees out of phase and 208 has its out puts at 120 degrees of phase shift. This was why I...
  12. Craighell

    Dyno Installation

    If your dyno is an inertia dyno, it won't use water. It could be an inertia dyno with a water brake attached for steady state/ step and hold testing. I agree that air flow through the room is of utmost importance. Plan on feeding 150 cfm of fresh air for every 100 hp. Then add to that 900...
  13. Craighell

    turbo buell and harley exaust manifolding

    Hey Jayskind, Not sure where you are, but I would love to work with you on the turbo system dyno tuning. I have a small dyno room in NH and Buells are part of my interest (I own a modified M2 that I now call an M1W) Good luck w/the project.
  14. Craighell

    Top Fuel Dragster

    Also consider that the Fuelers are not looking for more power right now. Tuning fuel delivery and clutch is the most important thing. At 8,000 hp the guys are having a hard time NOT breaking the tires loose. That's with a single speed trany. This past year had many examples of fast guys...
  15. Craighell

    205 mph on a Honda 1000 cc?

    You would have to add about 70% more power to an RC51 to get that kind of velocity....along with the proper gearing and testing/tuning for peak mph. It was the pilot's screw up...piloting a moving Cesna, clocking two motorcycles (CBR600 and RC51) and keeping track of who crossed what line on...
  16. Craighell

    4-VALVE HEAD - OPTIMUM PORT VELOCITY??

    I have hear the strange shriek on ports that had a tight radius. (old honda exhausts and mid 80's 1100 and 1150 Suzukis). On the exhaust side - I was told it is the the air separating from the port floor as it exits. Building up the floor and raising the port resulted in less noise and more...
  17. Craighell

    Injector flowbench test fluid

    A 50/50 mix of DI water and Isopropal will work without the worry of explosion. it will not dry as fast as pure iso - but better than Pure DI. also will not cause the o-ring deterioration that pure iso will cause.
  18. Craighell

    Effect of gearing on dyno figures.

    I see this post is old but... It depends if you are running an inertia dyno or an absorption dyno and if it is a motorcycle sprocket change or an automotive rear end. On an inertia dyno, no. Yes the torque at the tire is multiplied, but since the drum RPM is reduced by the same factor as the...
  19. Craighell

    I must have stumped Bosch - O2 question.

    Considering that water vapor displaces oxygen, I believe those who say that the reading will be in error. It is important to know the partial pressure for all gasses during calibration. This partial pressure calculation is skewed by the itroduction of water. I can't say how much as I would be...
  20. Craighell

    Wireless tach pick up

    Thanks Bart, that may be the answer to my needs and wants. I'll have to try it out. Yoyo; The need for the pick up is not replacement of the factory tach (many cruisers don't have tachs or the tachs on the bikes are not very accurate - Hondas are highly optimistic - the 400cc CB1 only turned a...

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