BOV on LC

[Romeoisgraham]

Before I start I want you to know I have done a search and all my intention of this thread is, is to ask your thoughts.

The other night in Glasgow I was driving home when I saw a yellow LCR rushing around the city, to my suprise it was dumping at every gear change. I thought thats a very loud Forge split-R valve he has. So I put my foot down and caught up with him at the lights, I undone my window asked him if hes a SCN member (No idea about SCN). He asked me to pull over for a chat so I did and I then found myself quizzing him over his BOV. To my amazement it wasnt the Forge split-R valve, it was an after market BOV and he had his return pipe blocked up or ''plugged''. I asked him if he ever had problems with fault codes or if the car run any different. He continued to state the car runs fine and he loved the sound. Never had a problem with it and its been on for 7 months.

How does this not cause a problem????

Any response with be great as its been doing my head in all weekend.

 

[dannyk]

If you'd searched a bit harder you would've seen the answer yourself!
Some cars (1.8t's) can run a BOV without any problems but most can't or will throw up a fault code eventually, i tried one on my LC and it threw a code after 10 mins! other LC's have had it run one for months with no issues.

 

[RikH]

i know of people running HKS SSQV's and other fully atmospheric valves without Eng Man issues
i also know of people who tried and it ran terribly and give errors galore

unfort graham, i've no idea how they do it!

 

[Romeoisgraham]

Do the fault codes clear when you change the BOV back???

 

[traumapat]

http://www.seatcupra.net/forums/showthread.php?t=58641&highlight=bov+damage

pretty much explains the argument.

 

[Romeoisgraham]

So would you think trying an atmospheric BOV is worth a go?

 

[dannyk]

You could give it a go if you like, like i say i did and it didn't work but managed to get my money back on the BOV so wasn't too bad!
I have a forge re-circ valve and a ram air induction kit and it sounds fairly loud, my mates say it's loud outside too.

 

[Romeoisgraham]

You could give it a go if you like, like i say i did and it didn't work but managed to get my money back on the BOV so wasn't too bad!
I have a forge re-circ valve and a ram air induction kit and it sounds fairly loud, my mates say it's loud outside too.

Thank you

 

[RobDon]

As said a BOV is a hit and miss affair, BUT ... even if your car doesn't throw a fault code that doesn't mean nothing is wrong. My car can run a BOV but after a month I get a lambda probe fault saying the signal is too high, which means it's running richer than normal, also means it's using more fuel. Eventually this can lead to CAT failure and also bore wash, which is too much petrol in the combustion chambers, unburnt fuel wets the bores and increases friction which will cause piston ring failure.

Unless you switch to aftermarket engine management and remove the MAF - running a BOV is a bad idea for many reasons. I love the sound of a BOV but I know my car runs safe and properly with a DV. A DV with a metal intake or open cone filter is loud enough to be heard outside the car.

 

[Romeoisgraham]

As said a BOV is a hit and miss affair, BUT ... even if your car doesn't throw a fault code that doesn't mean nothing is wrong. My car can run a BOV but after a month I get a lambda probe fault saying the signal is too high, which means it's running richer than normal, also means it's using more fuel. Eventually this can lead to CAT failure and also bore wash, which is too much petrol in the combustion chambers, unburnt fuel wets the bores and increases friction which will cause piston ring failure.

Unless you switch to aftermarket engine management and remove the MAF - running a BOV is a bad idea for many reasons. I love the sound of a BOV but I know my car runs safe and properly with a DV. A DV with a metal intake or open cone filter is loud enough to be heard outside the car.

So I shouldnt try it then.

Your picture site is the nuts mate.

 

[RobDon]

Basically it's your car and you're free to do it if you like. The HKS SSQV and the Collins twin-piston dump valves will give you the best chance of success.

Also ... some are running with TWIN valves, leave the stock DV (or whatever you've got there) in place and fit a BOV onto the cold side just before the throttle body. The DV should keep the ECU happy and the BOV gives you the sound, plus it also has the added advantage of clearing all residual pressure. Same idea as the Forge Split-R but sounds much louder!

I'm currently experimenting with the Bailey DV30 on the hotside and a Collins BOV on the coldside, actually works really well and sounds sequential, you can hear the Bailey DV on light throttle and dumping first, on harder throttle you can hear them both which is freakin' awesome!!!

 

[RobDon]

Do the fault codes clear when you change the BOV back???

No they don't, they have to be cleared using VAG-COM.

This video clip is of a Golf Mk4 1.8T with a Forge DV and a cold-air intake:

http://s112.photobucket.com/albums/n191/robd67/?action=view&current=forgedv.flv

You don't need a BOV!

 

[Big_daddy]

No they don't, they have to be cleared using VAG-COM.

This video clip is of a Golf Mk4 1.8T with a Forge DV and a cold-air intake:

http://s112.photobucket.com/albums/n191/robd67/?action=view&current=forgedv.flv

You don't need a BOV!

That sounds abit funny compared to blow valve eg, blitz/hks.

If you get a hks valve with the reciculating adapter, with carbonio filter, will it make a sound similer as if it was a blow off?

 

[beezasport]

No they don't, they have to be cleared using VAG-COM.

This video clip is of a Golf Mk4 1.8T with a Forge DV and a cold-air intake:

http://s112.photobucket.com/albums/n191/robd67/?action=view&current=forgedv.flv

You don't need a BOV!

that sounds fantastic!

 

[Roelích]

That does sound awesome.

 

[Romeoisgraham]

No they don't, they have to be cleared using VAG-COM.

This video clip is of a Golf Mk4 1.8T with a Forge DV and a cold-air intake:

http://s112.photobucket.com/albums/n191/robd67/?action=view&current=forgedv.flv

You don't need a BOV!

Got any pictures of how this is set up?

Sounds awesome!!!!

 

[beezasport]

Can't get mine to sound anything like that running 20psi tried split r running it full recirc and split...it's nowhere near as loud!

 

[wez1981]

Basically it's your car and you're free to do it if you like. The HKS SSQV and the Collins twin-piston dump valves will give you the best chance of success.

Also ... some are running with TWIN valves, leave the stock DV (or whatever you've got there) in place and fit a BOV onto the cold side just before the throttle body. The DV should keep the ECU happy and the BOV gives you the sound, plus it also has the added advantage of clearing all residual pressure. Same idea as the Forge Split-R but sounds much louder!

I'm currently experimenting with the Bailey DV30 on the hotside and a Collins BOV on the coldside, actually works really well and sounds sequential, you can hear the Bailey DV on light throttle and dumping first, on harder throttle you can hear them both which is freakin' awesome!!!

Very Big hmmmmmmmmm!! I happen to be waiting for my Split_R valve tommorrow, should i use the 007 recirc hot side and SplitR on full atmospheric
on cold side? (also got the DV relocation kit to make things easier)..

Tempted to say the least... would be interested in hearing anyone else who has done this or similar opinion ?

 

[AdamRoutley]

what DV and CAI is that on the mk4 RobDon??

 

[traumapat]

interesting