Originally Posted by jdmdohcpower

The surge you are talking about is not becuase the BOV is too small, its becuase its not opening at a low enough psi. You may get flutter at decel or highway driving?? You need a valve that will stay open under that condition not open/close (flutter) really fast.
Tial with supercharger spring is the only one that works correctly dumping at 2psi. I know a lot of people use godzilla but the problem is that doesnt dump until 6psi so partial throttle its fully closed and boost is back feeding. You may notice air filter oil in the air box. I did with HKS SSQV. went to tial and it does work. My HKS would flutter becuase it also opened at 6-8 so decel would sound like a turkey. The tial works as it should to get rid of the boost but is really lound and I hate the sound of normal driving and partial throttle becuase all you here is psssssssssss, it sounds like my car is broken and leaking. But, thats becuase its working correctly. Im considering changing to the q-r that works like the bypass valve and sends it back into the intake. The q-r is the same unit just has a port for venting back vs dumping out but dumping 12psi back into the intake may still push filter oil out of the filter but at least you know its not surge from the blower.
So from what I learned from Jeff Evans was:
If you car about your car use tial
If you care about sound use whatever the hell you want but you may see issues due to backfeeding boost

As far as front mount, I had a ultimate racing FMIC, went to aftercooler with front mount heat exchanger for SOS and I gained about 55hp. Yea, so dont do it is what Im trying to say. Way too much boost loss. Pick up an aftercooler and a front mount exchanger. Looks the same up front anyhow.

Originally Posted by E4RTH WORM JIM

I've just bought one of these today for my Comptech Novi 1000 kit.

Tial Q50 with green (-2.00) spring.

I removed the mounting plate, bored the exhaust port on the flange to 38mm to match the hole in the AC, then welded the supplied 50mm core they provided with the BOV to the flange.

You want this one:


The bottom one:

Originally Posted by jdmdohcpower

My thoughts are the q-r will be get rid of most of that noise. I havent tried it yet but you can swap the bottom part for about $70 to go from q-r to q and/or q to q-r so its a simple change if you arent happy.
www.extremepsi.com

If you or anyone else runs the Q-R please send me a PM, I would love to know the outcome.

here is a video of my setup with a light throttle flick. It sounds good here and between shifts but just listen to the BOV. Thats what you will here under normal driving:



tial

Originally Posted by s2k manic

i have a turbonetics godzilla bov on my comptech works good and doesn't flutter bought the supercharger used and it came with it i'm running 7psi with a 9000k redline