Any centri guys try something like this

[andrewtac]

Ah I see. Seems like a good idea if you want to limit ur power up top to not damage anything maybe?

It's adjustable by a spring correct? So you can change springs and maybe use that top end if you wanted to for a track day?

Correct on all, you will generate more heat and use more power to spin the blower; how much I have no idea.

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[Jackson1320]

I have not used one of these, but talked myself out of it (with input from others and my tuner). You bleed off boost, so loose some power. It changes the characteristics of the centri's boost curve. The boost building with RPM is one of the reasons I went centri. Figured this keeps from blowing the tires away, easier on parts, and at higher rpms still building boost.

How it works is you pulley down to where you will make like 20 pounds of boost at red line instead of 10. Now you will start making boost sooner. You still build boost with rpm. You just build it faster. And then you set how much boost it makes by bleeding off any boost more than what you need. So you still make the same boost ether way. You just get the boost faster. If you’re tuner can’t handle it then get another tuner

 

[andrewtac]

How it works is you pulley down to where you will make like 20 pounds of boost at red line instead of 10. Now you will start making boost sooner. You still build boost with rpm. You just build it faster. And then you set how much boost it makes by bleeding off any boost more than what you need. So you still make the same boost ether way. You just get the boost faster. If you’re tuner can’t handle it then get another tuner

Tuner can handle it just fine, just didn't think need it. However I am confused now, I thought you would bleed off any excess boost above what the spring releases to. If the supercharger is making 20 psi, the bov would bleed to 10 psi (with springs set to 10 psi); so your motor effectively gets 10 psi.

 

[Jackson1320]

Tuner can handle it just fine, just didn't think need it. However I am confused now, I thought you would bleed off any excess boost above what the spring releases to. If the supercharger is making 20 psi, the bov would bleed to 10 psi (with springs set to 10 psi); so your motor effectively gets 10 psi.

Ok say you want 10psi The bov/waistgate will bleed off anything above 10psi. But sense you have pulleys for 20 psi you are going to start making boost a lot sooner. A normal 10psi setup will see 10psi at redline. A torque boost setup that is set for 20psi at redline will see 10psi at around 4500 rpm and then hold that 10psi all the way to redline. The normal setup will have about 4-5 psi at 4500. So you will hit your boost sooner depending on what you pulley for. The higher boost you pulley for the sooner you get to start making boost and the sooner you hit your set boost. But you are limited to the max rpm’s that your supercharger can spin. Also if you pulley for 20psi and install a boost controller now you can adjust anywhere between your waistgate/bov spring of 2psi and 20psi any time you want

 

[andrewtac]

Ok say you want 10psi The bov/waistgate will bleed off anything above 10psi. But sense you have pulleys for 20 psi you are going to start making boost a lot sooner. A normal 10psi setup will see 10psi at redline. A torque boost setup that is set for 20psi at redline will see 10psi at around 4500 rpm and then hold that 10psi all the way to redline. The normal setup will have about 4-5 psi at 4500. So you will hit your boost sooner depending on what you pulley for. The higher boost you pulley for the sooner you get to start making boost and the sooner you hit your set boost. But you are limited to the max rpm’s that your supercharger can spin. Also if you pulley for 20psi and install a boost controller now you can adjust anywhere between your waistgate/bov spring of 2psi and 20psi any time you want

OK, we were saying the same thing; I probably wasn't using the correct words to describe it.

 

[Jackson1320]

OK, we were saying the same thing; I probably wasn't using the correct words to describe it.

No worries

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