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Does anyone have any sliced views or animations explaining how a bi-directional ratchet typically used in a sequential gearbox works?

Hi We wan't to make some axles from EN30B, first question, is there any better steel to use, bare in mind we don't get 4130/4340/300M locally. Secondly if EN30B can be used, what are the proper heat treatment for EN30B. Thanks in advance!

Anyone ever heard of or used these products? www.cnccontrols.com We are thinking of upgrading our 5T lathes with this system.

Anyone ever tried the cornay joints? They have some interresting video's here : http://www.drivetechnologies.com But they don't seem to be replying to emails. What do you guys think about it?

Stupid question, but does anyone know where I can find some material/images/sketches of different type of caliper seal designs? Most OE calipers have a rolling rubber dustboot setup, ive notices a few aftermarket performance calipers not having these. Next is the seal, is a teflon seal in a...

Hi I am busy playing with a few inlet manifold designs, and am wondering what would happen if you make the runners really short, 1" or so, and have the injectors sit inside the plenum? All manufacturing aspects aside, what would happen, would the car be really dead at the bottom end? The...

Hi The maker of the valves suggests using a bronze based seat, what are the best bronze based material to use? What about copper based materials for valve seats? Thanks.

Hi Is it really neccesary to cool the engine block? Isn't most of the heat in the head?

I had a look at Cosworths website and have notice that they used to run Cart engines with around 16000RPM's, but have now dropped it down to 12000RPM to make the engines last much longer. My question is though, what kind of valve timings are they running to get a turbo charged engine to rev so...

The praxis system developed by/with bridgestone: http://www.praxissystems.com Seems interresting, although expensive.

Would ceramic also work better as a white metal bearing as is the case with ball bearings? Cheers

Hi Does anyone know where I can find a company/organization that produces carbon-carbon? Thanks.

I have been looking the round the web and am finding alot of conflicting figures, does anyone know the true figures of shapal, also I have been able to find the fracture toughness, any ideas as to why they are not published? Regards

Hi What type of "fracture toughness" forces are present inside the internal combustion engine? Is it just the valves, or does the pistons, connecting rods, crank and sleeves also experience some for of fracture stress? Regards

Why is it that Cast Iron is used in automotive material... wouldn't a stronger steel work better, lets say EN19 or something? Regards ZoRG

Hi Can anyone tell me who sells the rotors? I just want the rotors, not any compressors? Or, if anyone is able to help me out with a cad file for a 3 lobe male/female screw profile, I would really appreciate it. Regards

Hi Does anyone know where I can find out about the marerial used in carbon/carbon clutches ? Regards

Hi How expensive is Nitralloy 135 and is there an alternative that can be used instrad, The application will be a dry rotary unit that has ceramic or carbon ceramic seals. I need something that will rather wear the seals and not the metal Regards Jonathan