Quote:
Originally Posted by Doughfield
After my archaeological dig through all the misc "modifications" (poorly done) on my 92 300SD, I have discovered that my Wastegate actuator is a KKK with 2500 stamped into the top and it is a pressure activated wastegate. It seems to fit OK on my Garrett M10 .42, but I need to put a pressure port into the turbo, since the "mechanic" put the pressure line 3 feet away on the side of the intake! UGH! I rarely get turbo, and when I do it is brief and doesn't kick in until about 2500-2700 rpm.
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If the actuator really is a pressure actuator, the 3-foot distance for the boost signal is not your problem. The port distance would only affect the wastegate opening at max boost (actuator opening point, hopefully 14psi). If anything it may allow a slight bit of overboost (say, 15psi instead of 14). Your turbo not "kicking in" until 2500rpm is probably due to lack of fuel off idle... have to adjust the ALDA (or turn up the IP full load) to fix that problem. But it ain't the pressure wastegate, or the previous mechanic's creativity...