Here is a new item we just came up with.  Blow off valves have always been a controversial part when it comes to Turbo Buicks as the belief is that an automatic transmission car does not need one.

   SPECIAL ORDER ITEM - ALLOW TWO WEEKS FOR DELIVERY!

Blow off valves are meant to relieve the built up pressure that happens when you suddenly let off the throttle after making boost.  You will hear a fluttering sound especially if you are running an open element filter.  The blow off valve releases this pressure quickly and makes life easier for your turbo.  Without going into a deep discussion on whether it is needed or not we are offering a kit for those that DO want one on the Turbo Regal.  Above is what I came up with.  The full kit is for those running a stock location intercooler and comes complete with a specially cut 2.5" up pipe, a special flange adapter, 3 lengths of black silicone hose, 6 t-bar clamps, the blow off valve and plastic tee and vacuum hose.

The blow off valve vents to the atmosphere, it is NOT set up to recirculate the air into your intake pipe.  After some testing I have not found this to be a problem on my GN.  Not to worry, this valve does not make a real "ricer" sound when venting.  Just a quick "pfft" sound and the flutter sound is gone.  You MAY still experience some slight flutter at partial throttle.

The blow off valve comes with an 11 lb spring which is perfect for our Turbo Regals and is rated to go up to 30lbs of boost. It is made "off shore" but the quality is extremely nice.  Wouldn't run it on my own GN if it wasn't!

Installation is relatively easy.  Remove your existing up pipe, Start by connecting one of the silicone hoses to your throttle body, insert the adapter flange into the other end of the hose with the BOV flange facing towards the alternator.  Next put another hose on the other end of the adapter flange and on the outlet of your intercooler.  Install our specially cut up pipe and install t-bar clamps on all the connections.  Take care to be sure the clamps do not interfere with the linkage on the throttle body.  

Next, is the installation of the BOV to the adapter flange.  There is an o-ring included with the BOV but I decided to use some copper silicone sealer on the connection instead of the o-ring.  The BOV is held to the flange with a v-clamp that is also included in the kit.  All that is left now is the connection of the vacuum line.  I tapped off  the hose that runs along the back of the alternator and it seems to be working out fine at that location.  A tee and short length of hose is included in the kit.

The blow off valve clears the hood liner without any problems.  In fact, I have a custom hood liner that does not have the indentation that the stock one has and I still have clearance.  

We are also going to offer a partial kit that just includes the adapter flange, BOV, clamps and silicone hoses for those of you who want to cut down your own up pipe or are using a front mount intercooler.

I only have a VERY LIMITED supply of chrome pipes available, email us first to see if any our left.   We also have a limited amount of black and silver powder coated up pipes as well.  Polished aluminum and plain aluminum are not a problem.  Once the powder coated pipes are gone, that's it!  We are looking for a source for 2.5" chrome pipes but they are hard to come by.

If you are running alky on your up pipe, the adapter flange has enough room to drill for your nozzle on the side opposite of the blow off valve.  See the pic below of the closeup of the adpater flange.

CLICK ON PICS BELOW TO SEE FULL SIZE