Ok, I have a 1988 SPG. We bought it about 3 years ago, and at that time it needed some work including a new APC etc. After the new APC was put in the performance was great, turbo boosted slightly into the red, drove great. A year or so later, the water pump went and thus the engine. After that we had Gary Blake of NH put in an 88 SPG engine from a car in their lot. Since the "new" engine has been in the car, the engine has been a little smoother, but has been significantly less powerful than before. The engine now only boosts 4/5 of the way into the orange(at its peak) and never hits the red. Is there any explanation for this? Should i adjust the APC? Any help would be appreciated.
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