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Ok guys, I keep reading these boost numbers and am not even close. I have a 93 5 spd. As far as I can determine it was stock when I got it (69K miles)
The pump does not ever appear to have been tampered with. I put the boost and EGT on prior to turning it up. It would run mostly 0psi @70mph level ground, but would go to 14 WOT.
Now at 133K. I went to 16cm hot side housing, smoke screw in +2 turns, full power ~+ 1 3/4 and star wheel 2 1/2 from the bottom, diaphragm at 3pm. New airfilter, fuel filter and set valves.
Oddly enough the star wheel was 5/8 turn off of bottom when I started. The diaphragm was already at 3pm. The smoke screw is pretty much flush with the top of nut now. The pin is making a mark (line) on the diaphragm shaft so I believe it is free. If someone tweaked it they did not leave a mark. The paint on the screws was intact.
So now I can get 2-3psi at 70 mph on flat ground and will go to 24psi WOT. EGT runs ~650 deg at 70 on flat ground. Will climb to 900 deg on a hill unloaded. It also will blow a thick black cloud off the line if you get on it until the turbo spools up in lower gears.
It runs much stronger than it did originally.
I see no evidence of leaks to the intercooler. (how would you check anyway?) What adjustment actually builds the booost other than turning the fuel up? Any ideas?
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Where is my boost?
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