Going to be fitting some Blow off Valve's soon but have noticed on most

modified Z'eds people don't mount them directly off the throttle body pipe and

normal mount them off the turbo pipe below instead - is there any reason for this?! Is it because it by-passes the re-circulating Bov's? Somebody please help as I need to know the best place put them for maximum effect!!

Hi Jon, which make of BOVs are you going to install?

I've got ApexI ones - which replace the recircs. TBH i dont know why one location (ie. in the bay) would be better than below in the front panel, or vice versa - hopefully a techie will let us know. I think the ones Ive got sound great - nice and loud, but that could be because they are almost outside the car (in the front bumper almost) as opposed to inside the bay.

PS with any luck i'll be taking a weeks holiday down in gorgeous Cornwall with the missus!!! Hope the weather's good.

Hello Dave, Weather's a bit muggy at the mo but gonna get really hot down here again soon! T-top off I feel! Yeah the one's on order are the new Baily ones that look a bit like the Blitz Bov's with a funny trumpet at the end for a more agressive dump! My mechanic says he's gonna ditch the standard recirculating Bov's and mount the new one's next to the throttle bodies cause they will work more effiecently. That set-up works very well on my 338BHP Nissan Silvia S12 anyway! We just can't understand why anyone would mount them anywhere else!!

BOVs are designed to prevent compressor stall. Therefore the best place for them is as close to the compressor as possible - on the outer pipes. Put them on the TBs and they will still be having to force air through the ICs and pipework before being vented=more drag=quicker stall....

My mate has a Bailey on his Punto GT and it sounds sweet - they're good value as well.

 

Andy, in laymans terms :rolleyes: IYO which is best - engine bay (on the pipes) or replacing the recircs? :confused: :D

For functionality, as close to the turbo as possible, so on the pipes in the bay, the outer ones....

...okaaay so you need a special adapter kit to be able to mount a BOV intended for the recircs to actually go on the pipes...?

what happens to the recircs and the piping around it?

Plug the holes and scrap the recircs :D

Cheers for all your help guy's + Andy, Didn't want my Z to be up the DUFF!!