Blow Off Valve

can you put a Blow off valve on a supercharged car? if so, where would it go? the intake?thanks

The short answer is no. If you want more boost , use a smaller pulley , make sure the proper supporting mods are in place first though.

TonySmooth89 wrote:

The short answer is no. If you want more boost , use a smaller pulley , make sure the proper supporting mods are in place first though.

BOV for more boost?


BOV basically lets out all the excess "pressure" the turbo makes when you/or the car shifts gears so your not making like 16lbs of boost at the bottom of second gear........ and it sounds good..... lol

A supercharger does not need a blow off valve, since it's RPM drops when the engine speed drops. A BOV works for a turbo because it allows the turbo to keep spinning at high speed while you lose engine RPM during the shift. Since the turbo is already spinning quickly, less lag in the next gear.

texasfan010 wrote:

can you put a Blow off valve on a supercharged car? if so, where would it go? the intake?thanks

Why would you even want to?

maybe he wants to do this:
https://www.youtube.com/watch?v=VbNxugO-uf0

Or to sound like this:

Can your run a blow off valve on a supercharger similar to the ones turbochargers have that make that whoosh noise?

I assume you're referring to the Waste Gate on a turbocharger... Our superchargers have a built-in Bypass Valve that makes no noise...

Could we mod it to make noise like that?

Don't think so... It's built into the supercharger and intake manifold. Totally different from external, thin-wall exhaust pipes and a waste-gate.

EDIT: I just did some checking, and while the difference between superchargers and turbochargers is the same, it turns out that the BOV is not the same as the waste-gate... The waste-gate is in the exhaust circuit, to control maximum boost, but the BOV is in the intake system to "blow off" excess pressure that has been generated, when the throttle is dumped closed....

Again, our Bypass Valves and Boost Control Valves take care of all this with one system, but I wanted to correct my previous post.

There's no real need for an external BOV on a supercharger. There's no extra boost left over when you let off the gas.

Eldo wrote:

I assume you're referring to the Waste Gate on a turbocharger... Our superchargers have a built-in Bypass Valve that makes no noise...

youre half right in the sense that you compared it to the BBV on the m90's, but darkvader is correct on referring the "woosh" sound to a BOV. the L67's have nothing comparable to a BOV. the reason a waste gate is like the BBV on the m90 is because it lets boost bypass the turbo based on the setting set by the boost controller, but it does not make the distinct sound of a BOV.

BOV: https://www.youtube.com/watch?v=-cEvqGSZGnY&feature=related
^when hes on the gas you can hear the waste gate bypassing the turbo, instead of the normal clean sucking sound of a turbo its a lot louder.

waste gate: you can hear the waste gate really good with this r33 skyline because it has a "screamer" pipe:
https://www.youtube.com/watch?v=0pmkqpahuC8&feature=related

Well, Tyler, I guess you caught me while I was editing my original 9:51 post... I did find out the difference between waste-gate and BOV.

Eldo wrote:

Well, Tyler, I guess you caught me while I was editing my original 9:51 post... I did find out the difference between waste-gate and BOV.

lol its not a problem, im surprised i still remembered that

(Doesn't make a lot of sense, but I've always wanted to use it... )

What about a front mount intercooler? Could we utilize those

Intercoolers have been done on a few of the Riviera's; they take a little work to make it fit but if you look closely at the banner on the top of this website, that's ewolfe's car and it has a visible intercooler. I think someone's trying to make an intercooler like the one on the ZR1 'Vette fit, the kind that goes between the S/C and the intake manifold, but I'm not sure if they're having success.

Thanks

Here's a writeup on how to do it!

https://rivperformance.editboard.com/series-ii-engine-transmission-f4/write-up-installing-intercooler-ic-t2288.htm?highlight=intercooler

DarkVader wrote:

What about a front mount intercooler? Could we utilize those

Browse the forums dude.
BUT, here's a link http://www.zzperformance.com/grand_prix/products1.php?id=234&catid=139

Quote :

Could we mod it to make noise like that?

Yep, it's easy: get a turbo. I've never understood why someone would want a blower to sound like a turbo. Blowers have their own sound, just like turbos have a specific sound. A blow-off valve has a specific function; the sound is only the result of that function. If you don't need the function, why would you want the sound?

Here's a product you may be interested in, it will whistle like a turbo, and give a 'blow off' sound when you release the gas. In all seriousness, it's really no different than adding a blow-off valve to a blown engine, and a lot cheaper:



http://www.turbowhistler.net/

You seem to be mistaken with a few major points - we use a roots type blower, which mounts directly on the intake manifold. There is noplace for the pressure to go but down. No place for a blow off valve and no need for one. If you want to add an intercooler, you need to put a heat exchanger under the blower outlet, as described in the ZZP link above, then pump coolant through it and another heat exchanger out in front of the car. I think what you are describing could only be used with a side mounted centrifugal supercharger, or a turbo, where you can intercept the airflow post-charger. What you are describing, I think, is an air to air intercooler, which you could not use with a top mounted roots style blower like ours. It's a whole different animal than the turbo-style system, which you could use parts of with a centrifugal supercharger system, which we do NOT have.

Do some research, this supercharger is different than a turbo and almost none of the same parts apply.

IBx1 wrote:

Intercoolers have been done on a few of the Riviera's; they take a little work to make it fit but if you look closely at the banner on the top of this website, that's ewolfe's car and it has a visible intercooler. I think someone's trying to make an intercooler like the one on the ZR1 'Vette fit, the kind that goes between the S/C and the intake manifold, but I'm not sure if they're having success.

Err...the intercoolers used on 3800's and any roots type blower (except the M90ed Thunderbirds which utilized an air to air setup like a turbo) are all styled like the ZR1 (water to air). The front mount core cools the the intercooler coolant before it enters the core in the intake manifold to cool the incoming air. The ZR1 is only different because the supercharger blows up into the intercooler and the air then flows down from there into the intake manifold, rather than in the 3800s where the blower blows down through the core to the intake manifold.

L67 wrote:

IBx1 wrote:

Intercoolers have been done on a few of the Riviera's; they take a little work to make it fit but if you look closely at the banner on the top of this website, that's ewolfe's car and it has a visible intercooler. I think someone's trying to make an intercooler like the one on the ZR1 'Vette fit, the kind that goes between the S/C and the intake manifold, but I'm not sure if they're having success.

Err...the intercoolers used on 3800's and any roots type blower (except the M90ed Thunderbirds which utilized an air to air setup like a turbo) are all styled like the ZR1 (water to air). The front mount core cools the the intercooler coolant before it enters the core in the intake manifold to cool the incoming air. The ZR1 is only different because the supercharger blows up into the intercooler and the air then flows down from there into the intake manifold, rather than in the 3800s where the blower blows down through the core to the intake manifold.

My bad, not too familiar with intercoolers. I must be thinking of the turbo setup.