I have a 00 F250 with exhaust, intake and TW chip and was only able to get 20lbs of boost pulling at the local sled pull. I had it on the highest tune available but thats all my gauge was able to achieve. I was thinking I may need to replace my wastegate with a big head. I just installed dieselsite's boots and that didn't help any. I am thinking I may have a week stock wastegate diaphram? I have never been able to achieve very high boost ever since I bought this truck. Help, any ideas?