How far down should the wastegate screw be??

[iain1067]

Sorry i know this has been before but have searched and searched, is 2.5cm the right distance for tghis screw to be turned down in stock form???? and should you measure from the top of the screw to where the blanking plug should be???

Thanks guys but i think i have got my lack of grunt sorted once i know this info.


Cheers


Iain

[s2driveruk]

i thought it was 1.5mm from the top of the screw....Mr Nugent will have the exact measurement.

If I were you I'd plumb in a boost guage and see what you are getting at the moment, i think just mechanical boost is 0.6bar on a 3b and has a max in stock form of 0.8. On the ABY version there is an overboost peak of i think 1.1 bar which lasts for 15 secs max but maybe someone can verify that.

HTH

David

[audiman]

Unplug the WGFV and check boost level. If its about 0.4-0.6 bar then thats fine. Its not essential IIRC.

[S2central.net]

25mm is the nominal measurement from the *inside* surface of WG cap to the spring perch...

But Tom's method is plenty good to establish that the spring is suitably tensioned.

A stock 3B pumps ~0.8 bar whereas a stock ABY pumps ~1.1bar on overboost.

PAul