Suggestion for the switchable supercharger...

[Blackonblack]

Hi,


I'm new to this forum, so first I want to congratulate you all for it...it's fantastic!


I'm a MadMax fan from Europe ( Spain to be more precise ), and some years ago I had a Ford Escort RS Turbo ( I suppose that you don't know what type of car that is..). I loved it, because it was fast, and sounded like a dream....that is, like the Pursuit special,hehe.


OK, back to the topic.....


Turbos have an exhaust valve. If it is open, the turbo doesn't build pressure...the engine just runs like a normal aspirated low-compression one....( All right, all right, you already know that )


I my car that valve broke once, and the car had little power ( It was a 1.6 litre engine ), but simply changing it made everything different. There are also control buttons that allow to play with different pressures, and rising the pressure increases power noticiably....so here is my suggestion:


- Put 2 little turbos ( Garret T3 for example ) in your V8's, and link the outlet valves of the them to your red switch. If it is not activated, you got an aspirated low-compression V8.....if it is pulled....you got the boost building up, and taking your engine to the top!


It even makes the nice sound that can be heard in the film ( But only when it accelerates ).


Just a suggestion! Don't blame me if I said something stupid....

[mfpmax]

Basically having a low boost/no boost setting and a high boost setting on the button.





The wastegate actuator on your turbo was stuck open allowing the exhaust gasses to flow freely past the turbocharger instead of across the turbine wheel.





One of the Reader cars is a Turbocharged Ford Mustang V8.





Anyway...you can buy some aftermarket boost controllers that have remote mount buttons to control a high boost setting. This would be a good application for your idea.

[rockatansky4073]

Blackonblack - awesome choice of name mate, surprised it wasn't taken already.

[Blackonblack]

He,he...I also was surprised!

[camchain]

Black on Black, that is a great idea. Keeping the wasegate in a constant open wouldn't be too difficult, and solenoids could be used to close it. THe only problem, is that it would constantly be venting exhaust from the open gate and this would reduce back pressure in the exhaust mannifold. Maybe the normally open position could vent back into the mannifold, to keep the pressure up?

[Blackonblack]

It can be also solved with a valve that provides partial obstruction of the exhaust. This valve, linked to an electric motor, could be also activated by the red button. You activate it, and the electric engine turns, closing the turbo exhaust valve and opening the escape valve. Your push it down, and the the turbo valve opens, and the exhaust closes. Switchable exhaust valves are used on may 2 stroke motorcycles ( Aprilia, Cagiva, Honda ) exactly to provide low-end torque. They open fully when the engine gets past 7000-8000 rpm ( That's electronically conrolled ) and the engine gives then all the power.


This is an idea certainly useful on every car that has a turbo on it.

[glennwalsh]

I have a 1.6 MR2 Supercharger with a switchable blower. As far as I know it is the only production car ever to have had this (I could be wrong, please don't flame me). The engine computer can switch the blower in and out using a magnetic clutch on the drivewheel. For fuel economy (I'm in the UK), most owners have a 'Mad Max' switch which disables the blower. The car then runs as a low-compression 1.6, but can still develop about 100bhp, okay for the wife to potter round town. Full on, the car runs about 190bhp, which is pretty respectable for a 1.6.


The point is that these blowers appear now and then on eBay, either a Toyota SC12 or SC14. They can deliver about 14PSI boost flat out (mine is about 11-12PSI) and you could rig the clutch to the 'Red Switch.'

[mfpmax]

Mercedes also apparently has a switched charger. I just found out about the SC14 setup recently from a Aussie computer forum.