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Old 10-12-2004, 09:21 PM   #1
Papa Smirf
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Default Even more insane than dual charging

There has been much expirementation with using a turbo charger to create a gas turbine jet engine. My teacher has a friend who setup one of these engines to produce way more compressor stage flow than was needed to selfsustain combustion in the turbine end he then would bleed off some of this compressed air and feed it into a big block chevy. It ran something like 30psi of boost ALL THE TIME. Wretched fuel consumption but murdered the field so badly at the drag strip nthat they banned it. Imagine this kind of power with a car putting it to four wheels!
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Old 10-27-2004, 02:27 AM   #2
blacktalon606
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30PSI of bleed air to a big block Chevy? Turbo turbines are notorious air hogs and there is no way you would get sufficient flow through one to self sustain and have that kinda air left over for a 2 liter engine unless the turbo was the size of a truck tire. A big block Chevy is gonna be a deep breather as well... I would like to see pictures if such a setup exists though.
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Old 10-28-2004, 05:35 AM   #3
ncarn8
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i beleive it is possible however there are 2 things im not sure of
- 30 psi boost at all times must mean at low engine speeds(under load) this is well above the surge limit of any turbo and engines cannot run such high pressures at low speeds
-how do they cool it?
i have a book with a jet turbine motocycle in front of me and incase ure intersted the specs are

pwr 250kw @ 56000 rpm
577 nm @ 54000 rpm
compression ratio 40:1
2 speed auto or mnual
brakes 3x 320mm discs brembo callipers and N1 shaft disc brake
dryweight 240 kg
1/4 mile 9.3@ 284.4 kmh
top speed 402.3 kmh(money back guarantee)
price $261,863 AUD
man i gotta get me one of theese
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Old 10-28-2004, 08:50 AM   #4
blacktalon606
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Yeah, well a vehicle running off of a jet turbine, and a home made jet turbine providing boost pressure to NA engine is a little different situation. The motorcycle is basically the same idea as a turboprop or turboshaft airplane or helicopter. YOu use a turbine to turn a a shaft and tap that potential. Lots of small airplanes and helicopters use APUs off larger jets as an engine. They sure make a lot of power for their size but they suck gas like no other.
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Old 10-29-2004, 10:16 PM   #5
Papa Smirf
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Most anyone who makes a backyard jet engine uses a turbo that was setup for a car with a compressor suitable for the required boost characteristics for a car not for a jet engine. Their probably is enough shaft power to run an excessive compressor big enough to feed the jet and the engine.

The turbo is cooled by its own oil circuit resivor oil cooler pump
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Old 10-30-2004, 01:26 AM   #6
blacktalon606
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Ok...dude... Again, to supply 30psi to a big block chevy it would take a big turbo. To self sustain a backyard turbine it takes a pretty big turbo... to self sustain and provide 30psi this thing would have to flow A LOT!
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Old 10-30-2004, 02:00 AM   #7
Basshead
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ncarn - jay leno has one..go see him..
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