Blow off valve inatallation
 

hi,

im sorry if this is cover somewere else but i cant seem to find any infomation on it.
Im unsure of how to install my BOV, iv got my begi s kit and an ebay intercooler, and now a BOV with flange but unfortunatly i have no instructions on how to fit the bov, if theres a write up some where please could yo usend me the link if not advice would be very greatful, even some pictures if your feeling realy generous.

Thanks :hustler:

More details. What kind of BOV?

Its one of Ebay, other than that im afriend i dont know, is there anything you perticually want to know?

Mount it either on your IC endtank or on a charge pipe after IC. Use a vacuum line off the intake manifold for boost signal.

Read post #8...actually read it all.

https://www.miataturbo.net/forum/t10821/

fantastic, thanks for the help, ill read through it.

i read the big diy post, it was very helpful,
as far as i can make out without the bov attachment which stops leak at idel its not realy worth having a bov unless your running over 6psi? am i right?
ill only be running 6psi on the begi s kit as ill be using the begi fmu untill i manage to get an MS.
The BOV i have is a one off ebay:
is it worth fitting it? shall i buy the attachment recomended to vent to atmosphere without upgraded ecu or shall i fit it as it is?
Attachment 203877

That is the exact bov that i bought and i have it on my begi-s without intercooler. You can get it to work without recirculating it. Just be ready to take it off several times. I had to add a few shims to get the right amount of hold pressure at idle.

realy, thats handy someone else who has it.
being from england i dont know what you mean by shims, could yo uplease translate for my simple minded english please.
do yo uhave any pictures and how did you install it?

I don't have any pics but i may be able to take some today. Shims is the term for metal disks that were place on top of the holding spring to add more pressure.

oh i got you, i guess its what we would call washers.
how many did yo uend up using?
if you have pictures that would be great i just need ot know how to rig it up and where each hose goes etc.

This might help.

https://www.miataturbo.net/forum/t18840/

What are you running for engine management?

VTA BOV + MAF = runs like crap

I tried it for a while, didn't realize hoe bad it was 'till I recirculated. Ran like crap for sure.
--Alex

Looking back now on how many times i've taken the bov off to adjust it i would recommend recirculating it also. I'll take some pics but as far as driveability mine runs flawless vta, perfect idle, good afr's, and cool sound. it just takes time, patience, and several times taking it off to adjust the spring.

You can still hear the sound if you recirculate it.

i found some pics.
https://www.miataturbo.net/forum/mem...ms/116/535.jpg

washer added
https://www.miataturbo.net/forum/mem...ms/116/534.jpg

https://www.miataturbo.net/forum/mem...ms/116/533.jpg

https://www.miataturbo.net/forum/mem...ms/116/532.jpg

https://www.miataturbo.net/forum/mem...ms/116/531.jpg

thanks for the pictures, did you still have the washers in place when you recirculated it?

Can you please tell me how to recirculate it, as i cant seem to find instructions on how to fit it?

To make it easier, I would just buy a TurboSmart recirculating diverter valve. It won't screw up your air mixture, you can still here it working, and they're not that expensive.

well the easiest way to recirculate the bov that you have is to replace the red bell with some type of pipe that will thread into it. Then run some heater hose form autozone from the bov to a spot on the intake in between the turbo and your maf. You will have to drill the spot out and weld another small tube up to the hole. Then attach the hose between the two.

If you recirculate don't use the extra washers, just keep it as it came.

You can find a recirculation adapter for the bov on ebay. Its called greddy type rs recirculation adapter.

once iv linked the bell with a pipe between the turbo and the MAF, where do i connect the other 2 take offs from the BOV?

The way you install your bov can easily be searched, there are alot of people who have pics for any application.

A general rule of installation:

BOV mounts after intercooler(either on it or on pipe after)

metal tube extending from back of bov is the signal line(attach it to a spot on the intake manifold using a small line)

bov can be vta or recirc (just connect the output source of the bov to a spot in between the turbo and maf sensor if you recirc)

(You may need to drill a hole into the intake pipe between the turbo and maf in order to weld a small pipe to recirc the bov)

Hi Viper,

Like I said on MX5Nutz I'd seriously recommend just buying a different BOV with the right type of attatchment for your charge piping.

There is already an area welded into the post-intercooler pipe before the throttle body for the factory BEGI recirculating pipework. Why don't you just get a BOV which will fit onto this with a silicone coupler?

It's going to save you welding on a flange and de-valuating the kit if you ever sell it.

Not to mention that this looks like a dogs dinner, is that JB weld? (I hope you don't take offence):

https://www.miataturbo.net/forum/mem...ms/116/532.jpg

yeah, iv had a good think about it and i think for now im just going to install the begi kit and the intercooler, and leave the bov out for now, and like you said may buy a recirculated valve instead, although i have all the attachments to install my bov neatly, i may recirculate it if i can put it togeather properly at a later date.

Lol, yeah that is jb weld putty! I wanted to put it on but i screwed up the placement holes. 1 bad idea later, JB weld. Hey it held for the time i ran like that. no leaks!

I would not do that again though!

after all the help an after looking through countless threads i cant find one that has information on how to recirculate this BOV, i understand that the large outlet on the right of The BOV pictures has to be plumb in to between the turbo and the MAF but i dont know where the two outlest on the left go to, please can someone tell me how to recirculate this BOV and where i have to plumb each outlet into.
Thanks

Attachment 203816

basic plan. BEGI uses a small pipe that goes between a pipe on the intake side piping and the throttle-side intercooler pipe.

nice little diagram, realy appreciate that, but i still have two small outlets which im unsure what they are suposed to attach to? or do i just leeave them attached to nothing?
any idea?

Strange, I have a similar setup as you but with an intercooler, yet my BOV is not venting fast enough. I took a spring out and going to test it soon.

To Viper, google it before it's too late!

I had to add shims because it wasn't closing fast enough and caused a big vacuum leak which would kill my car anytime the clutch was depressed.

my current setup now i have it recirculated so the shims have been taken out and i think only the larger spring is in it.

those two hose barbs at the left are the signal lines. You don't have to use both just make sure to cap the one you don't.

Ok, Will a vacume line from the intake manifold do the job?
Any other places to attach a signal line?

Thanks alot for the help!

signal from the intake manifold will be fine. I have mine running from one of the nipples behind the throttle body.