New pssshhhhhhtt valve

Wednesday, 2 August 2006 | Comments (0) | Categories: Engine

GReddy Type-R Blow-off Valve (Standard Spring)

Went and grabbed my new GReddy Type-R Blow-off Valve (Standard Spring) from Jeff's office yesterday and took a few pics. This is one of the largest blow-off valves on the market and comes in two configurations, the first with what they call a standard spring and the other with a 'race' spring. Here's an excerpt from a site I found with info on the two:

GReddy's Type R Blow Off Valve (BOV) is a simple, yet powerful design. The GReddy Type R Blow Off Valve is made from Billet and Cast Aluminum. The GReddy Type R Blow Off Valve uses an oversized 47mm Housing that is Intended for Engines that produce more than 400 horsepower and over 12lbs (0.82bar) of Boost. You can adjust the Pressure Relief by simply turning the knob on the Top. The Stock Spring Type R Blow Off Valve (BOV) Holds up to 18lbs (1.24bar) of Boost. If your Turbo Runs Boost levels from 16lbs (1.1bar) up, you can purchase the GReddy Stiff Spring Type R Blow Off Valve. You will need to purchase a Steel or Aluminum BOV Mounting Flange to Properly Install The GReddy Type R Universal Kit. (Thanks to

As I said I took a few pics so here they are:

- GReddy Type-R BOV (Side)
- GReddy Type-R BOV (Piston)
- GReddy Type-R BOV (Parts)
- GReddy Type-R BOV (Box)

From the size of it, a lot of people (as did I) mistake it for an external turbo wastegate - but I assure you this is a blow-off valve. We'll be mounting it on the passenger side of the intercooler where it will be plumbed back into the inlet just after the airflow meter (AFM - if I do end up with one) and the intake on the compressor housing. This will hopefully reduce the amount of noise from it as I'm not a fan of the psssshhht. Should generate more of a low wooosh sound similar to that of stock GT-R blow-off valves when you change from airbox to pod filters.

Apologise for the slow movement, but with only 3hrs per week to work on it, there's not a great deal I can get done - especially when there's parts that need prep before refit.


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