TheNeedForZ

Looking for more than 83mm LD crank. What's the longest stroke than can be put into an L engine...if the bores are notched to clear the rods. The diesel engine has a taller block but does that equal to a longer cylinder that can take even longer stroke? Rod/stroke ratio is overrated, don't need that. Thanks

Wow they actually have a forum. I was surprised that in a thread talking about the flaws of MYT, no one mentioned inertial loads. Apparently when they did a fuel run with the demo engine, a piston did broke off. I don't know how much better the new design can deal with inertial load, but it seems better. They mount the piston on an arm to allow piston to wobble and the doughtnut chamber wall will take out the inertial load, but the new design can lead to some sealing problem and chamber wall wear problem. If they make the pistons and chamber "half-moon" instead of a full round, they can rid many problems.

I do have a lathe but I am too dumb to figure out how to cut the flared opening.

The exhaust is not pulsed, only the pulses are evenly spaced; with cross plane crank, some exhaust pulses overlap a bit so the sound is not that clean. Single plane v8 crankshaft too has the long rod journal with 2 rods on each. The advantage for SP crank is better exhaust sound, better scavenging, and lesser counter weight on the crank. The disadvantage is more vibration since it now shakes like two I4 engine without any balance shaft.

Where did you see the new design of the pistons?

Once per revolution? or Once every two revolutions?

Thanks for the link.

Their website never categorize it as a rotary engine. The inventor of the MYT engine specifically said it's not a rotary engine. I suppose "rotary engine" specifically refers to Wankel/Mazda rotary engine. Let's not talk about the name of things.

cool but *sigh*...kids today wouldn't know the reference.

Sure you can define it like that. If rotary engine is defined as having continuous piston motion, then MYT is neither reciprocating nor rotary.

Better! it's 4300 c.c, Ferrari F430 engine? They have single plane crank shaft so the exhaust pulses are evenly spaced unlike domestic cross plane crankshaft V8.

Yeah from what the links showed, the Rotoblock is VERY similar to MYT, except in MYT the pistons move relative to ports while in Rotoblock the ports move relative to pistons. How the two inventors were able to obtain patents without infringing upon each others design is beyond me. They are both reciprocating engines, well...I wouldn't call the MYT a rotary engine since it stops and goes. They share the very same problem. At least the rotoblock has a running engine. They now need to find a way to move up in the rpm without breaking the engine. Inertial load is the major enemy.

While you are at it, please make a "belly pan" to seal the bottom of engine bay. I always wondered about the effect of belly pan for the S30. Keep us updated.

My post count was upped by 200 for no reason for a few weeks, now it got back down to normal.

Only the exhaust lobes are off? Can you send it back?

lol, talk about faux pas. But hey was there ever even a war fought between America and a major(not satellite) communist country? I know America only fought countries that do not have McDonald's.

read the first post fellas, the car is not his but his friend's. The silver one looks better.

Wow, I was getting a bicycle out of the trunk today and there was a difficult moment for the back. Right then, I felt a bit of youth just left me forever. Better listen to your advise. Hope you get well soon. Take good care and no more bending backwards to help the missus.

Looks like a 2 plus 2 Z. Of all the oldschool Datsun/Nissan cars, only a Z can swallow a small block with ease.

From what I saw in the other threads, this will allow VH45 to use Z32 tranny, right? So people who want to swap a VH45 into their Z can use Z32 tranny, correct?

Ok for starters I dunno why the inventor go all the trouble to make the cross section of the doughnut(and piston) a circle. If the cross section is a "D" or half a circle, the geometry of the piston (also a "D") allows more "meat" at the base where the piston is attached to the rotating ring. Regardless of being round or "D", the complexity(or simplicity) of machining remain unchanged. By making the piston very thin at the outer circumference and beefy at the base, the inertial load can be countered. Another radical engine design similar to MYT is Quasiturbine http://en.wikipedia.org/wiki/Quasiturbine

I wasn't being pessimistic, Heck, I want it to work, but MYT won't work AS IS. There are ways to solve the inertial load problem, that's by changing the shape of the cross section of the "doughnut." Tell you later, I gotta go watch deal or no deal

The "ground plate" will exacerbate the problem because a flat plate dropped into water never travels straight down. It falls like a leaf does. No offence, but the model dropping idea leads to too many problems. You have to provide a "ground" for the car; you have to make sure the car travels vertically; you have to make sure the heading is straight down; you have to control the speed of the car, and that's all in a standing, giant long transparent tube/chute filled with liquid. If you can find round tube of transparent material with one end already sealed that's fine, if you have to build it from plates the rig won't hold pressure for such a long, standing chute. Remember the tube/chute must be much larger than the model so the walls of the tube/chute won't affect results. Do it horizontally.

what?

Well now you are just in love with that engine because love is blind.