I was just wondering if the trd supercharger would be capable of accepting a blow off valve. I heard that the vortech supercharger is basically a belt driven turbo so I dont see why it wouldnt be possible. I want that supercharger whine as well do you think that the trd supercharger will produce this?

 

It is possible. Just stick it between the supercharger outlet and the throttle body.

 

anything is possible... but the question is: why?!

 

Cuz it sounds cool ;)

 

yea everythings is possible but is it usefull? I know a lot of turbo car that have problem using external bov because the air that is expulsed out is already calculated from the ECU so the car bug a little with that kind of bov because it dont have the air that it as measure.

Also, I dont know for the tC sc, but the sc on a MR2 MKI is not built to have a bov. The throttle body is in front of the sc, so when the throttle close, there is no air pushed to the throttle body by the sc since it is after the throttle body, so no need of a bov!

Later all
wawa 86 MR2 MKI SC and soon Scion tC

 

well in the Scion brochure on page 58, this particular setup has a bov...looks sweet, i wonder how many horses it produces and i wonder how much the turbo charger cost.

 

That is a turbo system, not a supercharger.

As for the reason to put a BOV on a supercharged system is that superchargers can have compressor surge just like turbochargers, and bypass valves can eliminate the potential damage caused by surge. (Plus they sound cool ;))

 

whats this whol bit about a turbo charger?...i thought it was a supercharger....all u are confusing me...

 

trd's maken a supercharger... aftermarket such as turbonetics is making turbo kits...

 

sorry to say but thats only a problem when people don't know how to properly tune their setups or are just doing it wrong.

alot of tuning modules have a way to compensate for that Blow off.

 

what is so confusing guys?? a supercharger is belt driven and a turbocharger is exhaust gas driven. simple as that.

 

yes i think everyone knows that or at least they should. but basically with the smooth power delivery of a sc the need for a bov is very minuscule.

 

It's not called a BOV for superchargers, I forget the correct name. But it's really hard to put one on a Supercharger because the superchargers in most cases are mounted directly to the throttlebody, leaving no space for anything...

 

Compensate? I'm sure you mean bandage. Anyhow, he is right... it's particularly a problem with Hot-Wire MAF (what Scion's have)... blowing off pre-metered air causes problems, as does compressor surge. This is why stock MAF based cars all have Diverter/Pop-off/Blow-off/recirculate/bypass valves, to return the relieved air back into circulation post-MAF.

There is no problem when using a speed-density based system...

God damn MAF...

 

I think its called a diverter valve?

 

What's that? :oops:

 

A MAF that uses a heated wire, air passing over it reduces its temperature. The more air, the lower the temperature. odd, eh? Thats how it determines air flow... lol

 

it depends on the type of supercharger.

If it is a Eaton style supercharger (i.e. Jackson Racing style) then no it is not compatible to have a supercharger. The supercharger housing actually takes the place of the Intake Manifold....so where oudl you put the supercharger? Also you have to remember how a BOV works, and it's purpose. It's purpose is to not force air into the Intake Maifold when the throttle is closed.....well with a Eaton style supercharger if the throttle is closed then your supercharger isn't working.

If you purchase a Centrifigual (sp?) type of supercharger (i.e. Vortech) then yes you can have a BOV and then it does serve a purpose as these type of superchargers work more like turbocharger.

 

The TRD supercharger is a rebadged vortech unit. So yes, it is a centrifugal supercharger and a BOV (or bypass valve or whatever the hell you want to call it) is appropriate.

Also if a BOV is set up right then the effects of blowing off metered air is minimal.

 

Agreed... on the first statement atleast...

On the second, I disagree... On a Hot Wire MAF equipped vehicle, the BOV will have negative effects on fuel economy and will richen the car in between shifts no matter how it's set up. You need some means of leaning the car out temporarily when the throttle position goes back to 0 all of the sudden. Or, you need to recirculate the air back into the inlet side of the super/turbo charger AFTER the MAF.