Supercharger throttle body placement question

[BigBanks78]

I will b using a bypass valve, when I say recirc valve or BOV I mean bypass valve but I was thinking the bypass valve would do double duty, release pressure when over boosting and bypass SC when not using. I can get an external valve like that right? If so can do you mind giving me some good terminology to search and some specs to go by? I see BOV's on web, some look like they have a 1/8" vac hose nipple on both sides of the diaphram but they don't have image.jpgmuch of an explanation to wether they can b controlled both ways. I already have a bypass valve control solenoid off a Buick 3800. I get it about noise. I watched youtube video of a vw with this SC, bov vented to atmosphere and I can't do that loud PPSSSSSSTT every time I shift so was going to vent mine back to inlet. I will put TB on inlet no argument :-).....do I route bypass behind sc tb? What would be a minimum tube ID for bypass tubing? Will the engine pull a vacuum if through SC TB when SC is bypassed, I mean using the SC TB as only air inlet in the system? I should be able to control the bypass valve in all ways with the 749 right? With the wastegate control pids....

[Xnke]

You need the one sold specifically for supercharger use-the poppet type do not flow enough to be useful in a compressor bypass valve.

The one from the Mini Cooper S would work just fine:

http://www.ebay.com/itm/Mini-Cooper-...-/191986610258
http://www.ebay.com/itm/2002-2006-Mi...-/262896611747

You might look at the stock eaton blowers on Ford and GM stuff for your ideas on where and how to plumb it.

[BigBanks78]

Ok GREAT :-) Thank you!! I'll head out to a pull your own part yard and c what I can find. Looks like may be able to fit a vacuum diaphragm to a TB and use.....maybe.....anyway thanks, oh I will b able to get vacuum when supercharger is bypassed right? Want to make sure I have brakes!! :-0!!

[BigBanks78]

About the time I tell someone it's running good something screws up!! I pulled up to my house couple weeks ago and idle afr went down to 10.8. Tried messing with fueling and couldn't get it to raise so checked mechanicals and found fuel pump won't hold pressure and 2 injectors had a tiny drop of engine oil on them so I'm tearing down the top end again. I was gonna put new t-chain tensioner after the first new one broke the piston retainer pin inside the tensioner and the new harmonic balancer I modified for sc drive pulley. Gotta find a quality parts supplier !!!! And thermostat keeps engine at 173f, it's a 180. Oriellys part that's only 4 months old. Maybe the valve seals are what's messing with me, I fixed some exhaust seals awhile back, guess I should have checked the others closer!!!:-/