ochizon

I just installed a new manifold and turbo, and have a turbonetics evolution wastegate on it. I have the 5 lb spring in the wastegate (which is the lowest rated sping it comes with) and it is boosting to 12 psi. There is no spiking, it just boosts 12psi. Any ideas as to why this might be happening? The wastegate comes out from the collector, so I dont think its a lack of flow...

tranceminister

What color spring is it? Maybe they accidentally shipped the wrong one.

ochizon

its a blue one. Supposedly a 5 psi spring

Slo_crx1

What gauge are you using to tell you that it's hitting 12? If it's an autometer, it probably is only hitting 5psi...autometer gauges are junk.

ochizon

its a zeitronix wideband unit with the boost sensor connection.

Slo_crx1

Ok, so your gauge is fine then. How good is your pressure source for the wastegate? Is it off the compressor housing or off the manifold? It could just be that they sent you the wrong spring