Can a rotary handle boost better than pistons
12-13-03, 03:25 PM
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Can a rotary handle boost better than pistons
Okay this might be a dumb question, but it seems like the rotary could handle boost better than a piston driven motor because of its basic simple functions, and turbine design. I realize that the ecu, and fuel ratios are necessary to handle the extra boost, and also that there are a few kinks with the motor namely the apex seals. But could a fully built rotary handle boost better than a fully built piston motor.
In short "Could I boost the **** out of my rotary and could it handle it, better than my v6, if done properly".
In short "Could I boost the **** out of my rotary and could it handle it, better than my v6, if done properly".
12-13-03, 04:10 PM
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The rotary operates in a rotational manner that has a lot less reciprocation (it is still there however) than a piston engine. It is not a turbine as it does not use the exhaust gas to drive a rotational turbine connected to the driveline.
You guys have to learn to seperate detonation from mechanical limitations of holding pressure. There are two seperate things. This is directly related to the seal design, dowel material, and the way the 'block' is put together. It's why you can't pump 3 bar into a 13b without heavy modification even if you have the fuel, air, and heat-exchange to do it without detonation.
That being said, CFM, and not PSI is the end goal. You want to pump as much air through the engine as possible. 1 bar @ 2500 rpm is not the same as 1 bar @ 8000 rpm.
You guys have to learn to seperate detonation from mechanical limitations of holding pressure. There are two seperate things. This is directly related to the seal design, dowel material, and the way the 'block' is put together. It's why you can't pump 3 bar into a 13b without heavy modification even if you have the fuel, air, and heat-exchange to do it without detonation.
That being said, CFM, and not PSI is the end goal. You want to pump as much air through the engine as possible. 1 bar @ 2500 rpm is not the same as 1 bar @ 8000 rpm.
12-13-03, 05:18 PM
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I think that in theory it should be able to handle as much boost as a piston driven car but the apex seal technology needs to be much better (or maybe a lot more expensive) than it is now.
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12-13-03, 05:58 PM
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It's best you use one of these if you want to put down 3 bar:
http://www.gpmd.com/cgi-bin/wgpinf100p?&I=OSMG1400
http://www.gpmd.com/cgi-bin/wgpinf100p?&I=OSMG1400
12-13-03, 08:20 PM
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A little off topic, but the other day a customer with a ford 
powerstroke diesel witha ton of turbo work on it. He had a 35psi boost gauge in the truck so I asked him how much it boosted, he said he didn't know because at WOT it buries the needle.
All I did was throw on a hytec tranny pan and diff cover (added cooling).
powerstroke diesel witha ton of turbo work on it. He had a 35psi boost gauge in the truck so I asked him how much it boosted, he said he didn't know because at WOT it buries the needle. All I did was throw on a hytec tranny pan and diff cover (added cooling).
12-13-03, 08:46 PM
#14
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Turbine design?
Hmm, how about a Pratt and Whitney PT6 in an FD3S? Detuned dramatically that's worth 600 hp. They run just fine lightly modded at 1,000 hp.
The tranny tunnel, however, may have to be "enlarged".
The cost might be a little prohibitive, but on the plus side it should last a million hours and you'll never need to worry about "pinging" it. Really.
(They cost about $175,00.00 USED)
Hmm, how about a Pratt and Whitney PT6 in an FD3S? Detuned dramatically that's worth 600 hp. They run just fine lightly modded at 1,000 hp.
The tranny tunnel, however, may have to be "enlarged".
The cost might be a little prohibitive, but on the plus side it should last a million hours and you'll never need to worry about "pinging" it. Really.
(They cost about $175,00.00 USED)
12-14-03, 12:16 AM
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A gasoline engine intakes a mixture of gas and air, compresses it and ignites the mixture with a spark.
A diesel engine takes in just air, compresses it and then injects fuel into the compressed air. The heat of the compressed air lights the fuel spontaneously.
I don't think that would be too great in a rotary.
A diesel engine takes in just air, compresses it and then injects fuel into the compressed air. The heat of the compressed air lights the fuel spontaneously.
I don't think that would be too great in a rotary.
12-14-03, 06:17 AM
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12-14-03, 11:37 AM
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From what i've seen around speed shops and at the track, a 4 cyl turbo motor can usually take more boost, however, rotors usually tend to be making more power at the same cfm. I guess a rotor and a v6 would probably be making around the same power at the same cfm, but a v6 can still squwees around 900-1000 hp.
12-15-03, 01:08 AM
#24
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Re: years of R&D...
Originally posted by REDNECK
I'm going to school to be a ME...so maybe one day I will invent the diesel rotary. and for the record it was a joke... Ryan.
I'm going to school to be a ME...so maybe one day I will invent the diesel rotary. and for the record it was a joke... Ryan.
http://www.geocities.com/cd23c/
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