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supercharger ?

9159 Views 45 Replies 21 Participants Last post by  425STi, 
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Has anyone taken off the turbo and replaced it with a supercharger ?
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STI Future
Bruin said:
Has anyone taken off the turbo and replaced it with a supercharger ?
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Lol


“Some say that he can’t eat mashed potato for religious reasons, and that he recently received 47,000 tickets, Olympic tickets, all of them for the final of the Women’s Wrestling. All we know is he’s called the Stig.”
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STI Future
Maybe it's been done. I know plenty of people have supercharged the BRZ but the STi has always been praised for its turbocharged performance.

Supercharger = pay for power

Turbocharger = free power

Superchargers offer hp at the cost of fuel where as a turbo "recycles" the exhaust of already spent fuel.

Exhaust gases go into the turbocharger and spin it, witchcraft happens, and you go faster.

I don't see why anyone would want to replace the turbo unless it was a peculiar build where the owner had built a motor that required a turbo the size of a basketball and was simply tired of lag.


“Some say that he can’t eat mashed potato for religious reasons, and that he recently received 47,000 tickets, Olympic tickets, all of them for the final of the Women’s Wrestling. All we know is he’s called the Stig.”
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HeatSource
the old RS's have a decent fanbase for supercahrgers

My M62 Supercharger Build & DIY-How To - Subaru Impreza GC8 & RS Forum & Community: RS25.com
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Bestswat
Why would anyone want to do that, you will be able to make more power with a turbo. Only positive side I see to a supercharger is its linear power band curve which can be safer on the engine and the fact that it is belt driven for lag-free issues.
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LaW
I thought I saw a Subaru STI that was twin-charged running a turbo and supercharger? That was a long time ago though.
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gregroot198521
LaW said:
I thought I saw a Subaru STI that was twin-charged running a turbo and supercharger? That was a long time ago though.
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I remember at least one thread on that too, don't believe the guy ever got it to function quite right though. Now my interest would be an H6 swap with a supercharger. :naughty: I bet that could be hard-on inducer.
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HeatSource
Bestswat said:
Why would anyone want to do that, you will be able to make more power with a turbo. Only positive side I see to a supercharger is its linear power band curve which can be safer on the engine and the fact that it is belt driven for lag-free issues.
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not sure if you are refering to my post or not but, its popularity in the older cars is due to the fact they are commonly built for autocrossing and a supercharger is preferred to some since it is lag free as you stated above and the motor is N/A so they can go either method of boost without one being much less difficult other than the last and have their preference.
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HeatSource
gregroot198521 said:
I remember at least one thread on that too, don't believe the guy ever got it to function quite right though. Now my interest would be an H6 swap with a supercharger. :naughty: I bet that could be hard-on inducer.
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saw a twin turbo H6 swapped GD on the european ebay about a month ago. that engine bay was crammed as hell.
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RecceRS
A twin-charged setup would be what you would be looking for on an STi. Aka, supercharger for low RPMs boost and the turbo for mid and top end. Most Group B cars ran those setups in the '80s, pretty badass but also very costly. Never heard of it being done on a Subaru, but you never know... ;)
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bboytaktix
RecceRS said:
A twin-charged setup would be what you would be looking for on an STi. Aka, supercharger for low RPMs boost and the turbo for mid and top end. Most Group B cars ran those setups in the '80s, pretty badass but also very costly. Never heard of it being done on a Subaru, but you never know... ;)
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also never heard of a twincharge setup running properly and efficiently enough to justify the cost/work involved compared to a proper single/twin turbo setup.
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E
that is like getting rid of your hot supermodel wife, for a more expensive hot supermodel wife?
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S
STi+supercharger+better interior=S4

DONE! and you get better interior ;)
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Jay11STI
^^^^^^^^^^^
mind = blown
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bboytaktix
^^lol there are so many inefficiencies I can spot in that setup
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SavageSTI
Like all the air being introduced to the set up across the all the heat coming off the motor for one...


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gregroot198521
LaW said:
I thought I saw a Subaru STI that was twin-charged running a turbo and supercharger? That was a long time ago though.
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bboytaktix said:
^^lol there are so many inefficiencies I can spot in that setup
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Yeah, noticed a few too, but still; DAMN!!
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HeatSource
here we go. turbo and supercharger

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Leftbehind126
STI Future said:
Supercharger = pay for power

Turbocharger = free power

Superchargers offer hp at the cost of fuel where as a turbo "recycles" the exhaust of already spent fuel.
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I'm not a supercharger expert, well.. I barely know anything about them at all really, but I don't think I agree with your post. Doesn't a supercharger do the same thing a turbo does, just using a different method? The supercharger is still compressing and forcing more air into the combustion chamber just like a turbo is.

When you have more air in there, you're going to need more fuel whether the source is a supercharger or turbocharger. I'm not sure where you're getting this "free power" from.
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