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Model specific boards => Golf mk4 => Topic started by: harlemex on 13 October 2011, 13:26

Title: Baileys twin piston
Post by: harlemex on 13 October 2011, 13:26

I have one of the above fitted to my car and ive been reading what people say about replacing with a forge jobby. I havent noticed any running issues with mine and read somewhere that the twin piston design solves such issues. Not sure whether this is true or not and wondered if anybody could shed a little light? Cheers   :cool:

Title: Re: Baileys twin piston
Post by: jamie16v on 13 October 2011, 13:31

http://www.car-performance-parts.co.uk/performance_road_products/bailey_dump_valves/bailey_dump_valves.htm
some useful info on there. perhaps explains why people have trouble with their single piston atmospheric valves.
i suppose it depends on wether the valve is fitted before or after a mapping session as if fitted before then the issues could be mapped out???.  :undecided:

Title: Re: Baileys twin piston
Post by: Dave_IOW on 13 October 2011, 13:58

Think they do run better with a recirc, I had a dv26 and car ran fine but bit hesitant between gear changes.

I don't understand though tbh as a 007p loses a lot of recirculated air back out through intake so I don't actually understand how its any different.

Just wanted to get this in before Rich locks topic  :grin:

Title: Re: Baileys twin piston
Post by: porter_89 on 13 October 2011, 14:02

The 008 might be better I guess lol

Title: Re: Baileys twin piston
Post by: harlemex on 13 October 2011, 14:06

cheers for replies guys, still abit confused tho  :laugh:

Title: Re: Baileys twin piston
Post by: jamie16v on 13 October 2011, 15:00

dont quite understand myself tbh, i know the recirculated air is metered after the maf and this may have an effect on the reading.
how much of an effect i wouldnt know?

Title: Re: Baileys twin piston
Post by: Dave_IOW on 13 October 2011, 16:48

Quote from: jamie16v on 13 October 2011, 15:00

dont quite understand myself tbh, i know the recirculated air is metered after the maf and this may have an effect on the reading.
how much of an effect i wouldnt know?

Indeed, MAF reads air going in past the sensor, goes through turbo, through intercooler, then change gear, 007 opens, air goes back to TIP, half goes back to turbo, half goes back out through MAF, and out through CAI / Airbox making the woosh you associate with 007 and CAI, so some must escape anyway.

I really cant see how it makes much difference but ALOT would disagree  :grin: