For Car Junkies

Post by **austenbosten** » Fri May 11, 2007 6:13 pm

Of Course We all know that the whole, manual switch for the supercharge was a fake, but I am curious I've been researching, because I want to make this thing a reality. I've been reading about a Boost Controller. Is there a way one could use that as a switch? I'm not an auto mechanic, but I am highly curious.

Post by **DetritusMaximus** » Fri May 11, 2007 7:06 pm

Do some research on the supercharged Toyota MR2 of the late 80's. It had an on/off supercharger.

The main problem is the torque on engagement. It might just tear things up.

Post by **mfpmax** » Fri May 11, 2007 7:42 pm

Look into the Mercedes SLK230 Kompressor...and any other supercharged Mercedes from the 90s to now.

Post by **waynegt351** » Sat May 12, 2007 7:10 am

the jap toyota yaris has a centrfugal clutch on its super charger. it only works when full throttle is applied.. it is possible to do an on off supercharger. its already been done on a nissan 350z.

Post by **Madmaxing** » Sun May 13, 2007 3:42 am

The on/off aspect will not work with the Roots style blower because the rotors would restrict the intake while not functioning.

Steve

Post by **DetritusMaximus** » Sun May 13, 2007 4:43 am

To make it work you need at least two things. Make that three...

1-a dual intake set-up using an intermediate manifold in between the blower and blower manifold. You would run unpressurised air thru this intermediate manifold, bypassing the blower. It would need valves to close it off when the blower is turned on. Think of it as a variation on the ram-air theme, having different intake tracts.

2-Electronic Fuel Injection. You need this to move the fuel supply to a point past both intake tracts.

3-this would be a real bear to make work right, so you need someone with a degree or three to program two separate fuel maps and make it work right.

It 'could' be done. But why? For the time and money you'd need to invest in it, you could have two Interceptor replicas. Besides, since custom fuel mapping is usually specific to a given car, rarely can you use the same map and have the exact same result. When dealing with supercharging or turbocharging, it better be right. All this means is that it would be darn near impossible to make and sell a 'bolt-on' kit. The mechanicals might, but that is the easy part.

Post by **Foxtrot X-Ray** » Sun May 13, 2007 4:17 pm

Doodled this up ages ago.

Had it sitting in my photobucket album.

Post by **mfpmax** » Mon May 14, 2007 6:39 am

Quote: Originally posted by waynegt351 on 13i 1/2Mayi 1/22007

the jap toyota yaris has a centrfugal clutch on its super charger. it only works when full throttle is applied.. it is possible to do an on off supercharger. its already been done on a nissan 350z.

WHAT THE HELL! NObody told me the Yaris has a supercharger setup out! SCREW THAT! I'm ordering at hatchback right now! Toyota keeping secrets again.

Post by **Brian S** » Mon May 14, 2007 2:19 pm

[div]

A Boost Controller, if you mean like an Eaton bypass valve used on positive displacement superchargers, is used to bleed off boost pressure like a wastegate on a turbocharger. It does not change the speed the blower is turning so there would not be any on/off effect.

Torque really shouldn't be an issue on engagement unless a lot of RPM is involved. Toyota MR2s used small 2-lobe PD supers, w/bypass valve and an electromagnetic clutch. They made very little boost and needed about 1/10th as much power to drive as a 6-71.

I've never seen or heard of a centrifugal clutch on a supercharger. Where can I find info on this? I've heard of a Nissan 350z GT-S Concept. It uses a Centrifugal blower, not Positive Displacement, and the on/off method doesn't seem to be specified.[/div]

Post by **mfpmax** » Mon May 14, 2007 7:11 pm

Ford used a electro hydro clutch or something. Some technology they were working on at the time that uses a metal filled fluid that hardens when an electrical current is applied.