Roush M90 interesting mod

[Captainstr8edge]

The air still isn't compressed, just because there is more air than the engine would normally be able to take in. It is simply back pressure in the manifold which is not the same as compressed air.

Boost is pressure. Pressure means the air is compressed.

 

[klaw]

Just because a Roots supercharger moves more air than the engine can normally take in doesn't make the air compressed. A twin screw compressor, a centrifugal supercharger, and turbo's all compress air within themselves and then force that compressed air into the engine, a roots supercharger simply forces uncompressed air into the manifold. There simply is no compression of air in a Roots style supercharger system. These are not the same actions period. Engineer or not you aparently do not understand the principles of what you are saying.

apparently

 

[908ssp]

Just because a Roots supercharger moves more air than the engine can normally take in doesn't make the air compressed. A twin screw compressor, a centrifugal supercharger, and turbo's all compress air within themselves and then force that compressed air into the engine, a roots supercharger simply forces uncompressed air into the manifold. There simply is no compression of air in a Roots style supercharger system. These are not the same actions period. Engineer or not you aparently do not understand the principles of what you are saying.

YOU SIR ARE 100% COMPLETELY WRONG.

 

[Alfiedagr8]

Did he just say
"back pressure in the intake"? Wow that's a new one for the books. Lol
Well I guess that's how these belt driven turbos works???


Ford states" a supercharger is an AIR PUMP used to compress the intake
Air charge"
And goes on from there.

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[05armygt]

Did he just say
"back pressure in the intake"? Wow that's a new one for the books. Lol
Well I guess that's how these belt driven turbos works???


Ford states" a supercharger is an AIR PUMP used to compress the intake
Air charge"
And goes on from there.

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BELT DRIVEN turbo!!!! My god were on to something here!

But on a more serious note....let's get this thread back on topic.
The coolness factor of making the loudest blower even louder.

 

[JeremyH]

Check out forced air performance's rotrex setup, it uses the guts of a turbo that is belt driven basicly, a hybrid if you will, pretty neat concept but it has a small efficiencey window however like a twin screw.

http://www.forcedairperformance.com/supercharger/mustang.html

 

[05armygt]

Check out forced air performance's rotrex setup, it uses the guts of a turbo that is belt driven basicly, a hybrid if you will, pretty neat concept but it has a small efficiencey window however like a twin screw.

http://www.forcedairperformance.com/supercharger/mustang.html

That's actually pretty nifty, it makes you wonder what else is out there...

 

[JeremyH]

I try to stay in the know on this stuff lol

The newest big step I have seen is the water cooled twin screw, they have cooling water jackets in the front blower housing to help cool the discharge and gear end of the blower. Great idea and really a big step to help keep heat soak down in a setup thats always generating excess heat from compressing the air.

http://www.mustang50magazine.com/te...nne_bell_twin_screw_supercharger/viewall.html

 

[05armygt]

I try to stay in the know on this stuff lol

The newest big step I have seen is the water cooled twin screw, they have cooling water jackets in the front blower housing to help cool the discharge and gear end of the blower. Great idea and really a big step to help keep heat soak down in a setup thats always generating excess heat from compressing the air.

http://www.mustang50magazine.com/te...nne_bell_twin_screw_supercharger/viewall.html

Reminds me of the venom cooler that steig sells. Pretty neat idea, I wouldn't be surprised if someday they have an entire supercharger case that is water cooled, just have veins run through the side walls.

 

[JeremyH]

Not a bad idea for sure, that has always been a big drawback to a twinscrew imho. It bolts directly to the block and acts as a heat sink really always spinning. Trying to run auto-x or back to back runs at the strip or even prolonged street dirving has always been an issue for iat's, even with those steig upgrades and stuff like the killer chiller.

 

[05armygt]

Not a bad idea for sure, that has always been a big drawback to a twinscrew imho. It bolts directly to the block and acts as a heat sink really. Trying to run auto-x or back to back runs at the strip or even prolonged street dirving has always been an issue for iat's, even with those steig upgrades and stuff like the killer chiller.

Yeah, that's why I like roots type blowers, both types have advantages disadvantages though, I just prefer not to blow compressed hot air into my motor.

 

[Alfiedagr8]

BELT DRIVEN turbo!!!! My god were on to something here!

But on a more serious note....let's get this thread back on topic.
The coolness factor of making the loudest blower even louder.

Haha I thought u would get a kick
Out of it. And may e Jeremy should advertise his kits as exhaust driven supercharger. Lol. Anyways.

Oh Jeremy I seen a kit similar to that somewhere. I'll see if I can find that site.


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[05armygt]

Haha I thought u would get a kick
Out of it. And may e Jeremy should advertise his kits as exhaust driven supercharger. Lol. Anyways.

Oh Jeremy I seen a kit similar to that somewhere. I'll see if I can find that site.


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You continue to blow my mind good sir....you and your crazy off the wall ideas

 

[Alfiedagr8]

Well I can't take full credit as there is a story behind the belt driven turbo.
Basically some guy saw a centrifugal
Supercharger and said it was a belt driven turbo. So from then on me and a few friends use it as an inside joke. Lol.


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[Alfiedagr8]

Oh the kits were here

aerocharger.com/kit_pontiac_g8.php


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[jcw06]

Has anyone had to replace the bypass valve on their m90 from Roush? Mine is starting to go and the car will be parked once I get home until it's fixed

 

[Fish05]

Has anyone had to replace the bypass valve on their m90 from Roush? Mine is starting to go and the car will be parked once I get home until it's fixed

How can you tell on the M90 if it is starting to fail?


Back on topic
The Roots and TwinScrew build heat as you all have mentioned. Would adding a meth kit for the lower IAT's be the best way to a cooler air charge? If so how effective is the meth kits at cooling?

 

[05armygt]

I've always heard that meth kits are dangerous. Yeah you can lower the IATS that way but from what I've read on people's installs and tuning / driving it seems to me like it's more trouble then it's worth. You could use nitrous to cool the intake charge. Even a small 20-35 shot would cool.
Or just get a bigger h/e bigger pump more coolant reservoirs etc

 

[702GT]

I've always heard that meth kits are dangerous. Yeah you can lower the IATS that way but from what I've read on people's installs and tuning / driving it seems to me like it's more trouble then it's worth. You could use nitrous to cool the intake charge. Even a small 20-35 shot would cool.
Or just get a bigger h/e bigger pump more coolant reservoirs etc

While it's true Nitrous would cool the intake charge, it will also make for an even hotter combustion process. Nitrous goes in cold, but it's an accelerant. Don't think of nitrous as a suplement to meth, it's strictly a power adder when injected into the motor, and should be treated as such. Either way, it'll make for an excellent pick-me-up in torque/hp.

Meth is like anything else, when used correctly produces the results it was intended for. Meth is fuel enrichment, not a power adder. Lower IAT's are a secondary benefit to using meth. Some people try to tune WOT basing it off added Methanol, which you can get away with so long as those variables never change. A car *should* be tuned without meth, and then meth added after the finalized tune, jetting accordingly. I can say as an eye witness that meth on the M90's boost level is kind of a waste. Not quite enough boost to justify it, unless you're trying to be very aggressive with spark timing. Again, if it's jetted properly, and you have a decent meth kit, and don't tune your car to rely on it, meth is good shit!

 

[Bmr4life]

Meth injection is fantastic when done properly. Just check out the Diesel and BMW forums.