Quote Originally Posted by Leighw85 View Post
Ok so what do you mean by load?
When im taking of from lights or so on, I get higher boost that when cruising. Sometimes it rises about the 10psi @ 2000rpm.
but when cruising @ 2000rpm for example ill get about 6-7psi at times.

Ok leaving my Dawes set at 15psi then, i have not seen it exceed that except for a small spike up to about 17psi for a second or so.
Load is when the engine is working, like when you take off. When you cruise, there isn’t much load, hence lower boost and lower EGT’s. When the engine is under load, eg taking off, accelerating up hill or just a heavy throttle, you should have your 15psi. If you back off the throttle, your boost should drop down to almost nothing.

Your EGT’s will only rise to high levels if the load is high enough, so that’s where you want to make good boost to keep the EGT’s down. When you cruise and boost is down, there isn’t much load so EGT’s and fuel consumption drops.