SOS install pics

Reply Subscribe

Thread Tools

Mar 5, 2012 | 01:13 PM

#51

MegaTRon

Registered User

Joined: Jan 2011

Posts: 672

Likes: 0

From: Arlington, TX

I'm assuming it has something to do with the crank pulley being connected to the supercharger.

Mar 5, 2012 | 05:34 PM

#52

99SH

Thread Starter

Joined: Nov 2005

Posts: 2,677

Likes: 9

Updated boost plot for those who asked:

Mar 6, 2012 | 03:14 AM

#53

RAIN H8R

Joined: Dec 2007

Posts: 4,757

Likes: 120

From: Waukesha, WI

The blower is pushing more air at idle then a turbo does at idle, plain and simple.

Mar 6, 2012 | 04:50 AM

#54

passnu2

Registered User

Joined: May 2011

Posts: 1,311

Likes: 0

Wow on their site it says 3 PSI spring

Quote:

Originally Posted by 99SH

What confuses me is that why does the BOV need to stay open for blowers but closed for turbo applications? Turbos also provide (very low) boost at low RPM.

I emailed Tial inquiring about which spring I should use. They stated for a supercharged application, run the 2 PSI spring as it needs to stay open at idle.

Can anyone explain why to use a 2 PSI spring vs the 10 PSI I'm running now. They're both open at idle.

Mar 6, 2012 | 08:38 AM

#55

99SH

Thread Starter

Joined: Nov 2005

Posts: 2,677

Likes: 9

Quote:

Originally Posted by passnu2

Wow on their site it says 3 PSI spring

The same spring produces an effective pressure of 2PSI when used on the Q BOV and 3 PSI on the BV 50MM BOV. Tial states that this is due to the increased preload (compression) the spring sees when installed in the BV 50mm assembly.

Mar 6, 2012 | 08:39 AM

#56

99SH

Thread Starter

Joined: Nov 2005

Posts: 2,677

Likes: 9

Also, for everyone's FYI. I got in touch with Tial today. They offer a free spring replacement if you need one with a different spring-rate.

I'm shipping out my 10PSI spring in exchange for a 2PSI spring.

Thanks RAIN H8R for bringing up the question.