I'm a friend of the owner and he sent the manifold back to sheepey and he's adding another 44mm flange up front at the collector

 

shitty manifold design for low boost pressure.. most manufacturers dont expect you to run 7psi on a top mounted 62mm setup anyways. Turn the boost up.

 

Some of the advise in here is comical.

 

Right haha

 

Did you even look at the plot? lol. It wouldnt hold ANY boost. It stopped making boost when the throttle was shut lol

 

You guys need to run electronic boost Ctrl solenoids and have your tuner dial them in to fight creep or get a new manifold

An aem ems and vs based boost tuned properly can bandaid your issue if its not like a 12--15 psi variance.

I read that u sent it back... He better do that for the free wtf... Shiny *** manifold or not....

 

the manifold is back on the car with another 45mm gate on it. On a couple street pulls we did, we saw 11.9lbs with a 10lb spring in one gate, and a 7lb spring in the other gate.

It goes back to the dyno friday with matching gate springs.

 

Well I won't be ordering any of those.