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Author Topic: Throttle body on compressor inlet  (Read 9446 times)

PhilStubbs

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Throttle body on compressor inlet
« on: November 12, 2013, 02:56:26 PM »
For packaging and space reasons, I'm considering the idea of pretty much bolting a turbo right the the cylinder head intake ports on the motorcycle I will turbo one day. What are the odds of engine vacuum pulling oil out of the turbo at idle and cruise?
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obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

92CXyD

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Re: Throttle body on compressor inlet
« Reply #1 on: November 12, 2013, 03:06:43 PM »
Odds are low if the turbo is good condition.  :noel:

Look at the WRC cars, they have TB before turbo and they are not always in boost.  :noel:
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PhilStubbs

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Re: Throttle body on compressor inlet
« Reply #2 on: November 12, 2013, 03:15:54 PM »
Yea, but I wouldn't be surprised if those turbos are rebuilt more often than I get gas. That's the only doubt I have using that as a convincing tool.
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obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

Foowee

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Re: Throttle body on compressor inlet
« Reply #3 on: November 13, 2013, 12:33:55 AM »
Run man cams that don't pull vacuum...  Problem solved  ::)
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rawr

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Re: Throttle body on compressor inlet
« Reply #4 on: November 13, 2013, 12:36:35 AM »
buy a liter bike, then don't worry about having to turbo it?
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PhilStubbs

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Re: Throttle body on compressor inlet
« Reply #5 on: November 13, 2013, 09:07:09 AM »
My intention isn't to have the fastest bike on the street. That shit got me in enough trouble 10 years ago. I just want to build a turbo bike.
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obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

crxvtec91

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Re: Throttle body on compressor inlet
« Reply #6 on: November 13, 2013, 02:34:39 PM »
Quote from: rawr on November 13, 2013, 12:36:35 AM
buy a liter bike, then don't worry about having to turbo it?

Only liter bike that scared me was a modded bmw 1000rr :evil:
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Re: Throttle body on compressor inlet
« Reply #7 on: November 18, 2013, 01:45:06 PM »
Quote from: rawr on November 13, 2013, 12:36:35 AM
buy a liter bike, then don't worry about having to turbo it?


Pigfucker thinks you are a faggot.
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HiProfile

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Re: Throttle body on compressor inlet
« Reply #8 on: November 18, 2013, 09:10:20 PM »
Draw-through carb setups saw vacuum at the compressor, and the only real concerns are you can't use a BOV or intercooler. If it's fuel injected, the other unconfirmed concern of fuel washing out the bearings is null. You could conceivable also use a vacuum-rated aftercooler if injected, too.

Just keep in mind a throttle body of a given size will flow more air through it when it's pressurized. Oversize the fuck out of the TB if possible. IIRC an older turbo design with carbon seals will be more reliable, since they need less lube (IE can deal with fuel in the compressor) VS dynamic seals used in most modern turbos.
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PhilStubbs

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Re: Throttle body on compressor inlet
« Reply #9 on: November 19, 2013, 09:15:22 AM »
It's gonna run megasquirt so, fuel in the turbo is no concern. The bike is a 750 that revs to 10k. I was planning to run a Honda TB. It's like 3x the size of the compressor inlet. I'm not gonna bother with an intercooler for now. Maybe water/meth if I have room for a tank tucked somewhere
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obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

92CXyD

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Re: Throttle body on compressor inlet
« Reply #10 on: November 19, 2013, 11:51:48 AM »
Quote from: PhilStubbs on November 19, 2013, 09:15:22 AM
It's gonna run megasquirt so, fuel in the turbo is no concern. The bike is a 750 that revs to 10k. I was planning to run a Honda TB. It's like 3x the size of the compressor inlet. I'm not gonna bother with an intercooler for now. Maybe water/meth if I have room for a tank tucked somewhere

This may come in handy making a kit for your bike. http://www.rbracing-rsr.com/waterinjection.html
 :noel:
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PhilStubbs

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Re: Throttle body on compressor inlet
« Reply #11 on: November 19, 2013, 02:46:54 PM »
Interesting. I'll be reading that better later
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obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.
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