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Thanks for all you responses. We ended up doing a few more hand calcs and discovered the specified thread length was more generous than what was required, so were going to mill out the bad starter holes and drill again. Many on the team were adament we'd have to fill them, and one guy even...

Sorry about that, got caught up in the frustrations of the morning. The hole is 17/32 and will be tapped to a 5/8-11 UNC. It's a through hole, so at 1.25 deep its poking out of the casting. The studs going into the holes are grade 8, and only are supporting 1500 lbs at most. This load is...

I have a "1 off" class 40 casting that has a partial drilled hole (17/32) in the wrong location. The correct location only moves the hole about 100 thousands from the incorrect location, and I need the entire depth of the hole to be threaded. The partial drill is at most .25” deep and the...

I was wondering if anyone has any quick tips or refferences to papers i might be able to find information on mixing fuel and air charges. Ive been told that below a certain velocity, i wont obtain an optimal mixture distribution and this could result in misfire, irregular flame propogation, and...

Nope, 36 hp wouldnt thrill anybody now days. The site does say the piston remains at TDC for 70% of the crankshaft rotation though. While it may not developing the punchy hp people enjoy today, would it not develop substantially more torque?

Its usually entertaining to see performance enhancers that end up inhibiting flow, increasing air velocity and dopping manifold pressures, etc. But i still dont think this can compete with the ebay specials. i.e. the tubular electric fans that install before your throttle body, and act as a...

Ive been following this engine for some time. First analysis of thier claims seem a little off. They origionally claimed efficiencies approaching 80%, but in the past several months have added new material and placed more realistic expectations. Still, compression to 6 atmospheres only works...

if you use a k value (gamma)of 1.3 or 1.25, im pretty sure thats a but closer to the value of air and gasoline in a stoichiometric mix.

Superchargers and turbos both will raise the temp of your charge, thats already been covered, but a turbo doesnt raise the temps solely based on exhaust gas temps. The majority of the elevation in temps is from compression. There can be some other heat exchages through the expansion and...

Ok, im not afraid to admit it. I tried the paper cup experiement. Guess i need to read up on my heat transfer.

it does sound interesting, but last time i checked, steel melts at about half that temp (between 2300 and 2700 degrees F) even if its only exposed to those temperatures for a moment, its still enough to damage the cylinder walls...

I am looking for any resources or tips regarding general gerotor design. I have found the Gerotor Design Studio software, but have been unable to run it on my system. Any assistance or advice would be greatly appreciated.