dodgetrucker75

i bought an s300 from a guy that custom builds them.... the wastegate was supposed to be fully open at 40 psi but doesnt seem to open till about 45-50 psi. it has the normal actuator on it with no place for adjustment. is there anyway to turn the psi down without getting a different actuator?

i just installed my twins today and would like to drop it to about 30psi opening pressure, right know i can hit 50 psi with less than half throttle, what kind of options do i have?

Fueling around

Ask the guy that sold it to you?

dodgetrucker75

would if i could get a hold of him..... 2,000 miles away

RowJ

Is the actualtor arm threaded with a lock nut? Never seen an S300 that wasn't. If so make it a bit longer so it opens more easily.
Have you tested the top turbo separately or are you guessing when it opens?

RJ

dodgetrucker75

i ran the top by itself for a little over a month, it jumps right up to 45psi then it will start to slow down on boost. i never got over 50 but i always backed out at that point too, and still a little uncomfortable for me, also there is no jamnut or threads on the arm, between the actuator and lever, i thought it might be a little different than normal....

renopker

I cut mine off and made it ajustable

dodgetrucker75

thanks! that looks great, i'll give it a try.

dodgetrucker75

just a thought but.... could i make slots for the bolt holes in the actuator mounting bracket and adjust it that way?

Lil Dog

That would work too, just not as easy to adjust.

dodgetrucker75

RENOPKER,
The cap on your wastegate cover, what is that used for? more travle of the wastegate?

renopker

Yes with out it it doesn't open far enough I also use a soft copper gasket .040 on the cover to seal the cover (I have an exhaust brake).