[s-cars] N75 vavle thoughts:

[Mihnea Cotet]

Josh,


The S2 WGFV (or N75 if you wish) is an upgrade for the 1.8T guys because it 
reacts slower and thus allows for more peak boost. I've BTDT myself on a 
few S3s where the owners wanted more overboost but where I didn't feel like 
opening the ECU, desoldering and reprogramming the chip again.

At high RPMs however, there's a fair amount of chance that you get even 
less boost, but it all depends on how high boost goes initially and on how 
much this heats the intake air temps...

There's no "upgrade WGFV" for the S2/S4/RS2 as apparently there's no slower 
WGFV than the S2 one (3B). The main differences between ABY and AAN valves 
is in the way they're mounted and in the pipe angles....

Another thing: the S2/S4/RS2 ECU doesn't display any boost control 
parameters in the measuring blocks. That's a real pity but no WGFV duty 
cycle nor boost levels are available....


HTH,

Mihnea

At 01:33 29/12/2003 -0500, you wrote:
>Hi guys..
>
>I been reading alot lately.. rediculus amounts.  I am not sure if this has 
>been mentioned.  Is there a S-car list search?
>
>
>The parts # listed for the waste gate frequency vavle:
>
>3b: 034906283j
>aby/adu: 034906283K
>aan: 034906283h
>
>Martyn(vagparts.com) or anyone else who knows vag parts #s knows that an 
>increase in letters means there was an upgrade.
>
>Does anyone know the difference between the 3 vavles?
>
>IT's funny The Golf 1.8T guys use the J vavle as a way of developing more 
>boost. Some admit to it like getting "chipped" again. They will probably 
>over spool the turbos and kill the bearing but they are having fun.
>
>Question I am wondering is the "K" vavle a decent Mod for you 3B an AAN guys?
>
>I wonder if someone could do a Vagcom run with the three vavles checking 
>out duty cycles?
>
>Just some food for thought.
>
>Cheers
>Josh
>
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