meTTamorphik

<center><img src="http://pictureposter.audiworld.com/12971/oem.jpg"></center><p>I recently installed the Forge diverter valve relo kit for my 2001 225 and drove it around a bit and couldn't be happier. Power was smooth, sounded good between shifts, etc. Then I realized that I installed it backwards. I'm running a Hyperboost HX compact dv so I switched it to what I believe is the correct OEM orientation for this type of valve (as shown above). Now when I drive it I get a massive amount of "fluttering" between shifts and overall it does not feel nearly as smooth. I've done some searches and consulted Steve's site and it appears that I do have it installed correctly now but it just doesn't seem right to me. I have not reset the boost machine back to default settings since installing the dv relo and am wondering if that may be most of my problem. Prior to the relo, I had the boost machine dialed in just right and installing the dv incorrectly only seemed to improve performance. I was hoping to get some expert advice from the forum gurus. TThanks

oldseTTer-WWKD

relocate piston type valves opposite OEM (diaphram types). See Forge instruction pic URL below.
Dont ask me why, the physicist in me says, (regardless of type or orientation) when the vacuum opens the valve, pressure is going to flow from high to low!<ul><li><a href="http://www.forgemotorsport.com/media/tt%20reloc%20kit%20instructions.pdf">http://www.forgemotorsport.com/media/tt%20reloc%20kit%20instructions.pdf</a</li></ul>

meTTamorphik

Makes sense to me. Thanks for the reply.

JohnLZ7W

one with a hyperboost compact and the other a hyperboost core, no fluttering at all. What spring are you using and are you sure the clamps are tight?

blackfnTTruck

<center><img src="http://images33.fotki.com/v1072/photos/6/645139/2927227/dvhyperboost005-vi.jpg"></center><p>

TTschwing

That's always the ultimate test..

meTTamorphik

My Hyperboost HX Compact only came with one spring. Internally it looks clean, spring is in good shape, etc. I have verified all clamps are tight and there are no leaks in the system. Since posting my original message I switched it back to the "non-oem" configuration and it runs like a champ. I'll do some more experimentation but it seems to work better for me in the "wrong" configuration. Thanks for info.

JohnLZ7W

I guess if it works it's not broken

BlueChip

<center><img src="http://images112.fotki.com/v580/photos/7/7305/149094/turbo_schematic-vi.jpg?1029696361"></center><p>has to do with the orientation. In one case the high pressure is helping to open the valve and in the other case it's not. The diagram above (from Schwing) shows the valve in the "correct" orientation, with the high pressure pushing against the side of the piston which is not helping to open it. As a matter of fact it seems like it would cause it to bind when the vacuum is applied possibly causing it to flutter.
Now if the valve is re-oriented then the (dark blue) high pressure will be pushing the piston directly to help open the valve.

BC