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Post by Chris Cristini on Aug 14, 2016 21:36:37 GMT -5
190mech pointed me to a forum about Innovation I cant seem to get enough of it Here is an interesting Exhaust they call trombone Pipe.
Do you get the same said advantages from DITech?
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Post by Chris Cristini on Aug 14, 2016 21:59:31 GMT -5
This is interesting for you 4 strokers.
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Post by FrankenMech on Aug 17, 2016 4:41:02 GMT -5
That Koenigsegg valve system is very interesting. I will have to watch it a few more times and the other demonstration before I figure any of it out.  www.youtube.com/watch?v=f4p-55a3WV8Variable valve timing and control has always been an interest of mine. Cams are so archaic... I have the parts to convert my old 400ci Ford to a roller cam. That is a big step up from flat tappet cams. |
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liftit
Scoot Enthusiast
Posts: 264
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Post by liftit on Aug 17, 2016 11:19:43 GMT -5
Those Rotax engines are ridiculous. Snowmobile engines are some of the most impressive CVTs out there. They routinely get swapped into Miatas and other small cars for autocross/ralleycross. My brother, mad scientist mechanic that he is, is in the process of swapping a Rotax into an old Porsche 944. I think its a 944.
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Post by 2stroked on Aug 18, 2016 22:43:01 GMT -5
I would LOVE to see the 944 some pics or a video....
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liftit
Scoot Enthusiast
Posts: 264
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Post by liftit on Aug 19, 2016 18:06:02 GMT -5
I would LOVE to see the 944 some pics or a video.... Just went back and checked. Its a 914. The new plan is a vmax4 motor in an 83 BMW 320 euro. |
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Post by Chris Cristini on Aug 22, 2016 16:10:18 GMT -5
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Post by spaz12 on Aug 22, 2016 16:38:50 GMT -5
43 horsepower? Wow! Hurry up and figure out how to transplant one into our scoots.
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Post by gsx600racer on Aug 22, 2016 16:54:54 GMT -5
A power/exhaust/rave/(& other industry names) valve would be nice for a small 2 stroke engine. It does suck that you can only tune for low end or wide open with nothing in between. Power valves give you both in the same engine.
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Post by FrankenMech on Aug 22, 2016 17:18:28 GMT -5
Wankels are still reciprocating engines, that rotor reciprocates as well as spins. It is a good thing that 294cc engine uses a chain drive, our tiny CVTs would explode.
I am still favoring a chain drive for my engine upgrade. I could use one of those timing belts though.
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Post by spaz12 on Aug 22, 2016 18:39:42 GMT -5
Wankels are still reciprocating engines, that rotor reciprocates as well as spins. It is a good thing that 294cc engine uses a chain drive, our tiny CVTs would explode. I am still favoring a chain drive for my engine upgrade. I could use one of those timing belts though. That has to be a misprint on the displacement, or something. That motor is tiny. Just look at the coil compared to the rest of the motor. |
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Post by Chris Cristini on Aug 22, 2016 18:47:48 GMT -5
I don't know the Wankel is an interesting engine this one is 70cc and it a little bigger that an I phone. Liquid piston |
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Post by spaz12 on Aug 22, 2016 18:52:36 GMT -5
I don't know the Wankel is an interesting engine this one is 70cc and it a little bigger that an I phone. Liquid pistonThey're gonna use that one for the military, yeah? I'm pretty sure I've seen that before. |
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Post by spaz12 on Aug 22, 2016 18:56:07 GMT -5
If it's 300 cc's then it's not all that impressive as far as horsepower goes. It sure is small though.
Looks small
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Post by 190mech on Aug 22, 2016 19:03:48 GMT -5
That rotary(Wankel) is like all the others,cant be rebuilt under the shade tree by your average southern redneck as tolerances are very close and takes special tooling for repair,,doesnt make 2T power,and is priced so only the rich folk can have them.. Compare its HP/RPM figures to OLD 2T MX motors,doesnt make the grade(my '77 RM250(aircooled) made 47hp),the LC MX250 motors made waay more than that a few years later.. Franken,they have some very high HP snow machines running rubber belt CVT's,work quite well,big a** belt and vari parts also,,popular swaps in the drag race world also.. www.youtube.com/watch?v=nrldkXg7-Jowww.youtube.com/watch?v=nQiHWtoBYFM |
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