Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: Craighell
  • Content: Threads
  • Order by date
  1. 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...
  2. 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...
  3. 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...
  4. Craighell

    Wireless tach pick up

    Hey folks, I have a need to hunt down a kit or plans or complete working assembly. Reason for this goofy mthod rather than just a simple clamp on inductive pick up: I have a chassis dyno for motorcycles. Getting access to plug wires is easy on Harleys and import bikes (prior to 1986), but...
  5. Craighell

    Injector dry firing?

    During a test session inside the trailer, our injectors lock up (at least make a drastic change in sound) at any opening event requiring more than 15.7 m-sec PW. ~85% duty cycle. The test is very short taking less than 30 seconds to complete, but I wonder if that matters. Note there was no...
  6. Craighell

    AFR-vs.-Power chart

    Does anyone know of a place where I can get a copy of the relative power change when one varies the Air fuel ratio (say from 10:1 through 15:1)? I realize peak power occurs at different AFR in different engines, but I assume some one like Charles Fayette Taylor or the like has done some base...
  7. Craighell

    Dyno Room questions

    I thought of putting this in an acoustical engineering forum, but I want REAL results rather than theory. Has anyone insulated a dyno-room for sound reduction (or any room - rock band jam session room in basement etc.)? What material did you use and how thick? What drop in sound pressure did...
  8. Craighell

    Correction Factor Limits

    I read in a Superflow manual that dyno test correction factors out side of =/-7% were generally not regarded as useful (meaningful). My Dynojet manuals have no mention of upper and lower limits and even detail a 1.18 CF for the purpose of explaining the maths. Is there an SAE paper or some...

Part and Inventory Search

Back
Top