New DV needed for Re-Map?

[ianv5]

Rev G is the latest revision for the MK5 and is still a diaphragm type and is used on the mk6 gti.

The rev D is the piston type and is newer than than the G but is from another model (can't remember what ones) but still fits and works with our cars.

It all comes down to preferance and after having both I prefer the G revision

Nick at R-tech tested the D and G versions and from what I remember the 'G' version held boost better. (stand to be corrected!)

[Nodz]

Yeah iirc he has found that rev d's can leak a little where as the diaphragm type make a better seal. They both can fail its just more noticeable when the diaphragm type fails

[Mk5 GTian]

I followed the advice of JKM, who replace it for the OEM piston type (which must be REV D if G is also a diaphragm)

http://www.jkm.org.uk/performance/tfsik03stage1.htm

I suppose the advantage of the diaphragm ones is you know when it's gone, as your car will be going like a 1.4 Match  :signLOL

[Nodz]

There's nothing wrong with the rev D it's just over time they don't seal properly, a bit like the diaphragm splitting on the others but it's harder to check on the piston type apart from smoke testing.

With the DV it seems to be what is flavour of the month it was rev D at the moment it's rev G. No doubt it will all change again

[GrayMK5GTI]

I've recently swapped back to a "G" - loving the noises it makes 

Nick @ R-Tech was surprised that my "D" was still leak free after about 18 months use 

[GarethB]

'G' for me too - swapped from a 'D' following R-tech's testing...

[Mk5 GTian]

Interesting. Mine was only done in June, but I'll get it tested when it's been in a year at service time. Do you know if the rubber of the diaphragm of REV G is made of a more durable (less likely to split) compound? If so, could be the best of both worlds if REV D piston types are leaking?