hi guys can you help?

im currently contemplating fitting a dump valve to my mk1 octavia vrs purely to give the sound effect, but there seems to be a dilema about which ones are compatible?

ive seen a couple on ebay that claim they are a direct replacement and claim they are specifically designed for the 1.8t 20v engines?

can some of you guys take a look and give me your opinions please.

FORGE SPLITTER SPLIT-R DUMP VALVE BOV OCTAVIA VRS 1.8T on eBay (end time 25-Aug-09 13:06:32 BST)

just so you know the car is standard at the moment, but im thinking of a remap at the end of august if that makes any difference?

thanks for your help

nick

That'll be the one for you if you want noise.

As the write up says some DV's cause problems.

Of course you could fit a CAI if your after noise.

HTH

what CAI would you suggest?

Either fit a Forge 007p and a CAI to get the noise...

Or you can fit a Forge Split-R which vents half to atmosphere and half back to the airbox. The Split-R with a standard airbox isn't quite as loud as the 007 with a CAI though, but is louder than the standard DV.

There are other companies that do similar recirculating or half-recirculating valves e.g. Bailey, APR.

The APR and Carbonio CAI kits are the best but they are very pricey. You can get good results from just a £40 ebay CAI tube and a K&N cone filter to go on the end of it

does a forge split-r throw up any warning lights? and dont you need to keep tinkering with it?

That is one very very cheap SPLIT.R valve

If you decide to go down that route , do that one , as it is cheap

I must admit , I love the sound of the CAI (Carbonio) with the 007P as some has suggested

The SPLIT.R will not bring on warning lights , but do need setting up

Sarah

It shouldn't throw up any warning lights as it does re-circulate some of the air so the sensor doesn't get confused.

However I was round a fellow members the other night and we found his car had a Forge Split-R fitted. We took it apart to clean it up with carb cleaner and when we put it back together and took it for a drive it was p*ssing boost out all the time and throwing a 17705 boost leak fault code. Turns out the top half of the valve can be fitted into the bottom half in one of three positions:

1st position is about 90% of the air is vented to atmosphere and 10% recirculated, but when fitted in this position the hole in the top half is so big and the spring in the valve is so weak that the boost leaks out through the hole all the time, not just when the throttle is closed.

2nd position is about 30% atm 70% recirc and is what he previously had it set on and seems to work best and give a bit of noise so we set it back to this position and problem solved!

3rd position is fully recirculating and is basically doing the same as a Forge 007p valve, I would set it to this for 100% reliability but on a standard airbox theres hardly any noise.

It shouldn't throw up any warning lights as it does re-circulate some of the air so the sensor doesn't get confused.

However I was round a fellow members the other night and we found his car had a Forge Split-R fitted. We took it apart to clean it up with carb cleaner and when we put it back together and took it for a drive it was p*ssing boost out all the time and throwing a 17705 boost leak fault code. Turns out the top half of the valve can be fitted into the bottom half in one of three positions:

1st position is about 90% of the air is vented to atmosphere and 10% recirculated, but when fitted in this position the hole in the top half is so big and the spring in the valve is so weak that the boost leaks out through the hole all the time, not just when the throttle is closed.

2nd position is about 30% atm 70% recirc and is what he previously had it set on and seems to work best and give a bit of noise so we set it back to this position and problem solved!

3rd position is fully recirculating and is basically doing the same as a Forge 007p valve, I would set it to this for 100% reliability but on a standard airbox theres hardly any noise.

thanks, are the positions obvious? and easy to set?

Forge Motorsport | Alloy Fabrication

Fitting and setting up , there

Sarah

Just become a bus driver if you want that 'phssstttt' noise

Just become a bus driver if you want that 'phssstttt' noise

Or get one of these:

Or get one of these:

Oh dear :(

Or get one of these:

Like I say, sounds like a bloody bus

what CAI would you suggest?

My answer = none!:thumbdwn:

Fit a decent panel filter.

Also Forge Split-r are not good IMHO.:rotz:

Fit a Forge 007P(a), the newer apdated version of the 007P which is adjustable. This means you can fit it so it doesn't rub on the bottom of your engine cover.

Edited 9 August, 200916 yr by N 5 0 VRS

hi guys can you help?

im currently contemplating fitting a dump valve to my mk1 octavia vrs purely to give the sound effect, but there seems to be a dilema about which ones are compatible?

ive seen a couple on ebay that claim they are a direct replacement and claim they are specifically designed for the 1.8t 20v engines?

can some of you guys take a look and give me your opinions please.

FORGE SPLITTER SPLIT-R DUMP VALVE BOV OCTAVIA VRS 1.8T on eBay (end time 25-Aug-09 13:06:32 BST)

just so you know the car is standard at the moment, but im thinking of a remap at the end of august if that makes any difference?

thanks for your help

nick

If you are after the loud dump valve sound found on cars such as Subarus, Rs Turbos e.t.c.... then you have bought the wrong car!

V.A.G cars use a different kind of D.V so you will never get the loud noise you hear on other cars.

Will be louder if you fit a CAI but as mentioned in post above, i would not recommend fitting one.

Your car though, and your choice!

thanks, are the positions obvious? and easy to set?

Looking at the blurb on the Forge website they say you use a blanking plate to change whether it is atmospheric, half and half or fully recirculating - so I guess Simons Split-R valve is an older model :confused:

On his the top half is fixed to the bottom half with three hex screws. The top half has two different sized holes and when you slide it into the bottom half you can see one of the holes through the trumpet piece in the side of the bottom half. You just rotate the top half until the hole of your choice can be seen and then screw the three hex screws in to hold the two halves together..

The biggest hole is option 1 above, the small hole is option two, or you can have it showing no hole in which case it's recirculating only.

You're also supposed to be able to stiffen or loosen the spring by turning the top of the valve but the one I looked at wasn't clicking when we did this so don't thing it was doing anything!

I think the Split-R is a bit more grief than the 007 though, but with the 007 if you want the noise you need a CAI

Edited 7 August, 200916 yr by chicken_eyebrow

My answer = none!:thumbdwn:

Fit a decent panel filter.

Also Forge Split-r are not good IMHO.:rotz:

Fit a Forge 007P(A), the newer apdated version of the 007P wich is adjustable. This means you can fit it so it doesn't rub on the bottom of your engine cover.

why wouldnt you recommend a CAI?

My son has run a CAI on his MK4 Golf for approx 4 years and he loves the sound of it , and being in Sheffield with the floods , he has had no issues

My fella also has a Carbonio style on his Octavia diesel

The Golf sounds amazing , and to be fair , Mark`s Octavia does sound pretty good too and it is only a 90bhp diesel

Sarah

That'll be the one for you if you want noise.

As the write up says some DV's cause problems.

Of course you could fit a CAI if your after noise.

HTH

What problems do they cause???

Dump valves , can bring on warning lights on the dash

It can also put the car in to limp mode

Sarah

why wouldnt you recommend a CAI?

Ok let me re-phrase

I 'personally' would'nt fit a CAI as opposed to 'would'nt recommend' fitting one.

Purely because i prefer my cars to look as standard as possible, even under the bonnet.

So removing the standard airbox is a no-no for me, fitting a decent panel filter is the route i have taken.

Carbonio is a brand that keeps popping up for those of you who would prefer the look and sound of a CAI.

As regards to the Forge Split-r, i tried one and did not get on with it.

I found i was forever trying to set it up and the vacuum hose on the top rubbed on the bottom of my engine cover.

Good well made D.V but just not for me.

Which is why i stuck with Forge but went for the more 'standard' looking 007P(a) in anadosed Black.

I've ran two dump to atmosphere DVs on my Mk I vRS and never had any issues with them.... I'm now running the Forge Split-R valve and its not spitting out ecu faults. Yes, rubs slightly on underside of engine cover, but minor niggle. Makes a woosh noise on gear shift, but its not terribly loud, as mentioned above, nowt you can do to change that!! Although I'm still running standard airbox at present, not for much longer I hope!!