Would there be any issues with putting a stronger spring in the oe dump valve,?.
Probably open even less than they do already (resulting in more compressor stall)
Vauxhall Carlton Estate - Z20LET, Greddy TD06-20G turbo, Tial 38mm external wastegate (screamer), 80mm drop, Camouflage paint job
I wouldn't think so as many people add a blanking plate which is the same as adding lots of washers. Have you ever thought of using a one way valve as many of us on here do?
As above, using a one way valve would be easiest option. Saves messing about, cutting an allen key to size and trying to dismantle the OE valve and put it back together.
Power: 0bhp. GT30 build in progress...
Guide: How to refurbish your K04 Turbo (Replacing seals and bearings)
I tried to put the spacer in the oe dv, spent about an hour trying to get one of the bolts off, gave up so went to halford and in 15 mins i had the one way valve bought and fitted. SIMPLES