Interesting boost issues

[alban1973]

Just to put a spanner in the works, I am just trying to get my head around this problem and was thinking about this.   Is the carb progressive second choke? so only comes in on 3/4 throttle. if so are the jets ok there. I know webbers do wear. Not sure that an unfueling carb would cause low boost tho.  any thoughts on that anyone??

 I have a different prob with my elford, it boosts at 5-6psi throughout the full rev range from 2800 rpm which is within spec for that setup, but anything after 5.500 rpm it is flat. lower revs it pulls like a train. But I did realise I had fitted an earlier small port engine....  so have just learned to live with it untill I find a later engine..............

[alban1973]

Sorry forgot to mention, that this would be my thoughts after you are 100% sure you dont have a leek in the intercooler, diaphrams, pipes, turbo etc, you might achive high boost initially before any wastgate action, then if you have a leek will it slowly loose pressure down to the said figure the longer boost is required...  keep us informed as it is a very interesting project....

[Timrxmotors]

Its still the wastegate,seized slightly open,Ant said he could not move the valve,even in a vice,so it is seized solid!