Twin turbo in a 951?
07-27-2002, 05:45 PM
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Twin turbo in a 951?
I was thinking about this today, is it possible to add another turbo to the 951, thus making it a twin turbo. Has anyone ever done this before? And how much of a gain would someone get from this? Also, is it possible to supercharge/turbocharge a 951?
07-27-2002, 05:57 PM
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[quote]Originally posted by amaf:
<strong>I was thinking about this today, is it possible to add another turbo to the 951, thus making it a twin turbo. Has anyone ever done this before? And how much of a gain would someone get from this? Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
words fail me.
<strong>I was thinking about this today, is it possible to add another turbo to the 951, thus making it a twin turbo. Has anyone ever done this before? And how much of a gain would someone get from this? Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
words fail me.
07-27-2002, 06:18 PM
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I'm sure it is possible to do...there have been a few twin-turbo 4-cylinders (most notable some Japan-only Subarus). It isn't necessary on the 944 Turbo...only if you want to flex your dick and say that you have one.
As for twin-charging, there have been a few twin-charged MR2s, an Integra, and some Koening-tuned (SP?) Ferrari. Tuning is a nightmare, that is if you can get it to work. Once again...its a neat way to flex your dick.
As for twin-charging, there have been a few twin-charged MR2s, an Integra, and some Koening-tuned (SP?) Ferrari. Tuning is a nightmare, that is if you can get it to work. Once again...its a neat way to flex your dick.
07-27-2002, 06:25 PM
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[quote]Originally posted by amaf:
<strong>I was thinking about this today, is it possible to add another turbo to the 951, thus making it a twin turbo. Has anyone ever done this before? And how much of a gain would someone get from this? Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
As far as twin turboing a 951...twin turbos end up being far more expensive and much more of a headache then they are worth for most applications. I imagine you are talking about a sequential set up (rx-7 twin turbo, supra twin turbo) where a smaller turbo will boost for low RPM's and a larger turbo will take over for high RPM's. If you have ever seen the vacuum routing diagram for an rx-7 twin turbo, you will understand why these engines blow vacuum lines and grenade all of the time...there are over 70 vacuum lines! I believe there are 7 or 8 lines in our 951's. All this would benefit you would be significantly reduced lag and V8 like torque over 1800ish RPM's, a flat torque curve from when the first turbo comes on boost, but no additional horsepower over a properly sized single turbo...tempting, but not worth the headache. It would probably cost $10,000 in custom fabrication, computers, and parts alone to attempt something like this, you would have to design it which is not something most shadetree mechanics could do. You do realize that most serious supra twin turbos and rx-7 twin turbos are converted to single turbos when they are making big power. Twincharging (super and turbo charging) would probably be less of a headache.
If you twincharge it, you will get the benefit of low torque from the blower and a less complicated set up, but then you have the paracitic loss from the supercharger (especially at high RPM's) and added complexity, but not nearly as much as twin turbos. If you could design a system with a blower that would be most effecient at low RPM's and disengauge (clutch out, like a 4A-GZ MR2) at say 3500 RPM's when the turbo starts kicking, you would have one hell of a set up, but it would most likely take a powerful aftermarket fuel/spark computer with programmable outputs to control the supercharger's clutch (a tec2 or tec3 would probably do it) and disengauge it at a certain engine speed. This of course will probably end up costing as much as twin turbos, but be less complicated.
<strong>I was thinking about this today, is it possible to add another turbo to the 951, thus making it a twin turbo. Has anyone ever done this before? And how much of a gain would someone get from this? Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
As far as twin turboing a 951...twin turbos end up being far more expensive and much more of a headache then they are worth for most applications. I imagine you are talking about a sequential set up (rx-7 twin turbo, supra twin turbo) where a smaller turbo will boost for low RPM's and a larger turbo will take over for high RPM's. If you have ever seen the vacuum routing diagram for an rx-7 twin turbo, you will understand why these engines blow vacuum lines and grenade all of the time...there are over 70 vacuum lines! I believe there are 7 or 8 lines in our 951's. All this would benefit you would be significantly reduced lag and V8 like torque over 1800ish RPM's, a flat torque curve from when the first turbo comes on boost, but no additional horsepower over a properly sized single turbo...tempting, but not worth the headache. It would probably cost $10,000 in custom fabrication, computers, and parts alone to attempt something like this, you would have to design it which is not something most shadetree mechanics could do. You do realize that most serious supra twin turbos and rx-7 twin turbos are converted to single turbos when they are making big power. Twincharging (super and turbo charging) would probably be less of a headache.
If you twincharge it, you will get the benefit of low torque from the blower and a less complicated set up, but then you have the paracitic loss from the supercharger (especially at high RPM's) and added complexity, but not nearly as much as twin turbos. If you could design a system with a blower that would be most effecient at low RPM's and disengauge (clutch out, like a 4A-GZ MR2) at say 3500 RPM's when the turbo starts kicking, you would have one hell of a set up, but it would most likely take a powerful aftermarket fuel/spark computer with programmable outputs to control the supercharger's clutch (a tec2 or tec3 would probably do it) and disengauge it at a certain engine speed. This of course will probably end up costing as much as twin turbos, but be less complicated.
07-27-2002, 06:33 PM
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DUR HUR! Just put a chevy v8 in! HEE HAW! (kidding). I would like to see a twin turbo 951. Nothing some stronger components and a little engineering couldn't fix.
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07-27-2002, 09:04 PM
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[quote]Originally posted by amaf:
<strong>Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
<img src="graemlins/c.gif" border="0" alt="[ouch]" /> nope.. impossible <img src="graemlins/c.gif" border="0" alt="[ouch]" />
<strong>Also, is it possible to supercharge/turbocharge a 951?</strong><hr></blockquote>
<img src="graemlins/c.gif" border="0" alt="[ouch]" /> nope.. impossible <img src="graemlins/c.gif" border="0" alt="[ouch]" />
07-27-2002, 09:04 PM
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Amaf, I thought you said your automatic 924S was faster than the 951.
Is that why you want twin turbos?
Why stop at just 2 turbos, maybe a triple or quadruple turbo set up would be better.
Anything is possible in Amaf-land....
Is that why you want twin turbos?
Why stop at just 2 turbos, maybe a triple or quadruple turbo set up would be better.
Anything is possible in Amaf-land....
07-27-2002, 09:46 PM
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[quote]Originally posted by deepice:
<strong>Why stop there just drop in a turbine.</strong><hr></blockquote>
turbines are for losers.
Go straight for the batman-style rocket engine. the spare tire area is pretty big, it'll fit right in there.
<strong>Why stop there just drop in a turbine.</strong><hr></blockquote>
turbines are for losers.
Go straight for the batman-style rocket engine. the spare tire area is pretty big, it'll fit right in there.
