Anyone had a Vegantune BOV?

[Mr Noble]

As I only use my car for pleasure at the weekends I am interested in getting some of the Darth Vada like noises that the original (2.5 i guess)car had. To be honest I was expecting them from my 3R but can't hear the air being sucked in and can only sometimes hear a faint ppsssssttt noise upon grar change.

I would like to hear from anyone how has had the Vegantune BOV inserted. I wonder what it sounds like and if there are any other ways to get some induction noise etc??

Thank you Gentlemen.

GN

[alex s]

Hi, mr noble you have a pm.

[DanH]

The main secret to getting the 2.5 sound is having the air filters moved to the original position just aft of the cabin. I've got mine there and they make the car sound unique.

I'm not sure a bov will have the same effect, which is actually why I don't think I'll be getting one! At the moment I get these wicked alternate woofles from side to side when I lift off.

wooosh............
..............woooosh
wooosh............
..............woooosh
wooosh............
..............woooosh
wooosh............
..............woooosh
wooosh............
..............woooosh
wooosh............
..............woooosh

etc

[hunttheshunt]

Surely it's the BOV or dump valve that gives you the woosh noise not the filters. They would give you more induction noise rather like a Nova 1.1 with K&N filter fitted!!

Or am I talking bollox...I hope not as I'm having the BOV done as we speak

[DanH]

hunttheshunt said:

Surely it's the BOV or dump valve that gives you the woosh noise not the filters. They would give you more induction noise rather like a Nova 1.1 with K&N filter fitted!! Or am I talking bollox...I hope not as I'm having the BOV done as we speak

Nah because the air comes back out the filters alternately on each side.

The bov will let all the air out one place, futher back from the cabin so it won't alternate and sound funky. It will however lessen turbo stall on gear changes and pehaps extend their life (although the boost levels are so low I'm not sure this is a real concern).

[hunttheshunt]

Noooooo it's the BOV surely. The air filters have very little to do with it. The woosh is the pressure being released by the BOV or Dump valve hence the name.

As you back off the throttle, the air is dumped out through the valves. To my knowledge (and I'm no mechanic)no air passes back through the filters, well it might on your one

The turbo stalling is a different device entirely as used on rally cars.

[slinky]

hunttheshunt, afair the noble doesn't have a wastegate/BOV as standard, so therefore the air does return thru the filters.. hence the noises described...

Add a BOV and the sound will indeed move and change as the air is no longer being forced back thru the filters..

slinky

[hunttheshunt]

Slinky, how come my 3R doesn't do it then. The air filters are a mere 4 feet further back, yet I hear nothing.

I thought the 2.5 did have dump valves hence the noise!

[hunttheshunt]

I think the saying goes 'In the valley of the blind, the one-eyed man is King'!


Trust me, I'm one of the blind. That said I had a CTR 1 which had large BOV's on each Turbo and it sounded like someone having a fry up behind you. That was definately dump valves not air filters.

[alex s]

The 2.5 and the 3 both have wastegates, not BOV's/dump valve, the reason you can hear it in the 2.5's and some 3's is that that wastegates vent back through the inlet system - then the filters, so it is the position of the air filters that determines how much you hear.

[hunttheshunt]

I'll get my coat..........


off to the CSL forum

[DanH]

It comes back out the filters on all cars unless they have an aftermarket BoV. Its simply down to their positioning.

[Mr Noble]

Being the original poster I think I am allowed to interupt this little tusstle. You will have the bear with me as I am very drunk!!

However, I am led to believe that Dan is actually correct. The noise is from the pressureised air being forced back through the air filters. I do actually get it on my 3R but its very faint and as the filters are both in the same area its just one noise.

One solution is to move the filters back up to the side intakes which was standard on the 2.5 and resulted in the Darth Vader antics.

The other solution is to fit a BOV. This will give a "MAX Power" style PPPPSSSSSTTTT every time you lift off the throttle. (you will also learn how to make it do a double PPSSTT PPSSTT)

I think I am right in saying that the turbos on the Noble are joined (via piping) so you only need 1 BOV. The car Huttlesunt mentioned had 2 turbos fitted independantly and would give 2 x PPSSTT's.

There is no point in moving the filters to the front and also fitting a BOV as the fittment of a BOV would stop the Woosh woosh noises that Dan H described earlier.

I considered moving the filters and Kerridgas told me they could do it for a fee. But the BOV is cheaper (if bought from the "correct" place) at around £250 fitted and gives a really "fun" and "good" noise. The filters also give a good and fun noise but the re-positioning of the filters looks awkward once done, costs more and changes nothing. (ie, extended turbo life, and less turbo lag)

I have no idea why a BOV or re-circ valve is n ot fitted as standard!!??

Please feel free to slate me if I have been chatting drunken bull mess. But please correct me well!!

Over and out.

GN

[Mr Noble]

Bloody hell, slinky was the last post when I started my essay. I must be hammered. 25 minutes that took me. Night night!!

[DanH]

Presumably its not fitted standard because turbo lag isn't really a problem, and they are expensive.

[Mr Noble]

They are not that expensive. I bet they would be standard if there was a 3 year warranty and the turbos kept blowing!!

[DanH]

Mr Noble said:

They are not that expensive. I bet they would be standard if there was a 3 year warranty and the turbos kept blowing!!

Yep but apparently not enough boost to make it necessary.

I thought they were 150 quid +?

[Mr Noble]

I guess they are.

I have never seen my boost go over 0.5. Is that normal?

[hunttheshunt]

Tussle not I....informative discussion from which I stand corrected.

Sounds like I'm having the right thing for me though with the BOV. Vegantune said I could move the air filters but advised not to bother as it costs a lot. BOV way to go on mine.

Liked the idea of the boost button they mentioned, sounds a hoot!!

[DanH]

Mr Noble said:

I guess they are. I have never seen my boost go over 0.5. Is that normal?

Thought it was 0.6 or 0.7 on the 3l, and 0.8 on the m400.

Of course under that kind of throttle I'm normally more worried about the road