wastegate spring problem...
 

i just put a 11.6 psi (big red spring) i got from tial in my wastegate but it only shows that i am at 8 psi...

the spring i had before was a 7 pound spring. its a tial 38mm wastegate. is it possible to put them in backwards... i dont think that would matter though so i dont know...

also, i have a small vaccum leak where my intake manifold connects to the head, i dont know if that would be my problem or not, because with the 7 psi spring it would hold steady at 7 pounds...

thanks,
Mike

Re: wastegate spring problem...
 

It doesn't matter which way you put it in. Where is your wastegate getting it's boost source from? If it is directly from the compressor you will make less pressure than if it was from somewhere on the IM and you also have pressure drop through the IC and charge piping to account for.

Fix your vacuum leak too.

Re: wastegate spring problem...
 

no i have my wastegate comming off of the fuel pressure regulator, bov comming from where the pcv usually connects and the guage is t'ed off of the bov.

yeah, the vaccum leak is killing me... hopefully when i get that fixed it will see 11 psi... where it should be

Re: wastegate spring problem...
 

What turbo and motor and what rpm does it hit full boost at? An exhaust leak could also cause your turbo to not spool up, either the head to mani, wasgate to mani or turbo to mani leak

Re: wastegate spring problem...
 

its a gsr with a t3/t04e .57

in 3rd gear i get full boost at around 4 - 4500 grand.

i dont know if it would be an exhaust leak beacause it would get to 7 pounds and hold there with the 7 punds spring. but it might be. i have new gaskets for the wg and head, but for the turbo it mani i used gasket maker stuff...

Re: wastegate spring problem...
 

I'd just double check my old setup had some major exhaust leask it would hold 6psi but the spool time gradually took longer...there is a weak poin that isn't alowing you motor to get more than 8psi either exhaut or boost leak...that is if your wastegate is working properly, double check all your couplers and clamps too, is your BOV leaking?