jaldo Posted March 13, 2020 Report Share Posted March 13, 2020 1998 Esprit V8. I recently installed a couple of Forge blow off valves (15-23 psi) ,The valves don't vent when revving up the engine.I had already change the springs (rated at 23-30 psi) since nothing was happening. Do I need to disconnect the wastegate valves for the dump valves to work? The engine runs perfectly,no issues with the factory turbos. Quote Link to comment Share on other sites More sharing options...
v8GTmac1 Posted March 14, 2020 Report Share Posted March 14, 2020 (edited) You need to go lower on spring pressure LoL. 918 is rated at 11 when all is running good. I’m still tuck at 4.7ish Edited March 14, 2020 by v8GTmac1 Quote Link to comment Share on other sites More sharing options...
jaldo Posted April 5, 2020 Author Report Share Posted April 5, 2020 On 14/03/2020 at 10:44, v8GTmac1 said: You need to go lower on spring pressure LoL. 918 is rated at 11 when all is running good. I’m still tuck at 4.7ish Update: I installed 5 - 11 psi springs and they work beautifully. Quote Link to comment Share on other sites More sharing options...
tmusc Posted April 6, 2020 Report Share Posted April 6, 2020 Can you tell me which blow off valves you got (model number from forge) Quote Link to comment Share on other sites More sharing options...
jaldo Posted April 6, 2020 Author Report Share Posted April 6, 2020 I got them from PNM: https://www.pnmparts.co.uk/dump-valve-kit-v8-8928 Quote Link to comment Share on other sites More sharing options...
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