i just got my turbo car together and they was tuning it at 10lbs and it made some good power but when the upped it to 14 the car made the same numbers, I am sort of lost on this one, the same setup on the other motor, i had the turbo
pushing like 18lbs so i know te turbo is good , i just cant figuer ot why its not makeing more power, all i can tink of is maybe that its blwoing the rest of the boost out

 

What's the car and the setup? How much power is "good power"?

 

What wastegate spreing?

 

i have it set at 10lbs of boost and it making 430 whp threw an aod with a real loose convertor

 

if the turbo is out of its efficiency range your scenario is possible. what size turbo/motor combo do you have?

 

Where are you measuring your bosst reference ie: turbo, intake manifold ect. Where would it blowing the the rest at? Hose connections tight?

 

At my shop we turbo'd a lightning and had the same problem. In the end it was his torque converter

 

thats what i am thinking, i will just say screw it and take it to the track and see how she runs

 

If you have a 10# spring how can you run 14# boost?

 

wastgate is my best guess, its prob dumping all the extra boost back in, where asre you getting your reading from? you should put one before the wastegate and one after, see if it shows a big difference between the two, if its 10lbs before and 10 lbs after then its either the turbo or and outside source before turbo. If its 14 before and 10 after the wastegate is dumping, 14 before and after its an outside source after the turbo.

Make sense? I'm not a turbo guy ( I have a blower and Nitrous) but seems like I have seen this problem with turbos alot, havent sen it with Blowers. but both have their drawbacks.