hi all just been scouting around come across the derv doctor is there anuy point on a diesel or any down sides to them as must admit would be interesting to see what peoples opinions are!

I quite like the idea although dont think it will gain anythin just cosmetic

problems are it sounds rubbish compared to a petrol dumpvalve, does nothing for performance and costs one heck of a lot of money.

I would personally spend that money on a Jabba ARB, if you've not already.

Something else to go wrong imo

I admit 295 is hell of a lot for that sound LOL

well in december my remap is coming along with pd160 and pipercross just thinking about other mods as the insurance doesnt go up as it is maxed out due to remap but thats only 100 pound more per an than if car was standard

Well covered in the past, a search would have furnished many results I think.

Had one on my Father in Law's Honda Civic 2.0 tdi. Must admit, combined with a Hayward and Scott full exhaust system, it sounded very nice!

in my opinion its only the amount it costs stopping people getting one on the TDI's. the question keeps coming back again and again so shows there are plenty of people out there willing to put one on their own car but instead follow the rest like a sheep because they say you shouldnt because diesels dont get any performance increase.

there is no reason in my eyes why you shouldnt get one. thats like saying every person with a dump valve on their petrol cars have done it only for its performance and couldnt care less if it makes a noise. B0ll0ks!

if youve got the cash and want one, get one.

Yeah but it serves a purpose on a petrol car, doesnt on a diesel.

Depends if you want your diesel to sound like a bus/lorry or not

I hate VTA dump valves - very ch@vvy imho

Chris

i bet 10% buy it for that purpose, the other 90% buy it for the noise!!

If you've heard it, next to a Petrol's dumpvalve. They don't sound much different.

The video's don't do the sound any justice.

i know a dump valve doesnt serve any purpose other than the noise on a diesel, which in my eyes is the main reason you would get one anyway (petrol or diesel ). It pi$$es me off when people say you shouldnt get one because people will say you drive round in something that sounds like a bus.

A dump valve on a petrol functions and is required (why it is fitted as standard). None of the recirclulating upgrades for the Octavia etc offer a 'noise' as such unless combined with a CAI.

I have no problem with cars making noise, I have a problem with £300 kits that make a noise. Be better off spending £50 on one of them speaker kits that just makes the noise if thats all you want it for.

I think its down to individual choice I think they are quite funky ( and if you drive a diesel it sounds like a bus/ van/truck/lorry anyhow) compared to a pertrol.

If they were not so expensive i think i would have one just to be different to the rest.

I have read somewhere that they can have a negative effect on performance on a diesel?

I think it depends on how well they are set up.

well i have a derv doctor dump valve on my 306 and it doesnt sound no different from a petrol as long as you are at full boost my ones 24 psi and with that it is very loud and gets noticed up to you i wouldnt mind having one on my fabia but i will have a switch put in to turn it off like the 306

By Dump valve I take it you mean a 'blow off' valve?

From what I understand it can actually damage your car.

Below is an extract from the Miltek website, whilst advertising their Hyperboost HXC Compact Diverter Valves:

A blow-off valve sends the "boosted" air into the atmosphere rather than the airbox/air filter. This is why they usually make a loud noise from the air releasing. This offers no real performance gain and in most all cases will cause sophisticated engine management systems, like in the VW or Audi cars, to incur errors and drivability issues.

Am I not correct in assuming our engines, along with Seat are the same as the VW/Audi engines, being in the VAG and all.

Hope I've been of help.....

Link below if you want to read for yourself.

Hyperboost Diverter Valve, Frequently Asked Questions about reducing turbo lag, increasing performance

That would apply to petrol engines. Diesels dont have one in the first place.

Fair enough. Just wanted to throw in my penny's worth!

Sorry.....