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Thank you for your reply!
The advantage of the APC system is it's ability to "Listen" for engine detonation, and reduce charging pressures. Low fuel octane, lean fuel delivery, etc. are common culprits for creating detonation which will always be followed by an APC reduction of charging pressures to insure engine longevity.
The SAAB B202 engine, between 1985 to 1993 was an outstanding platform for the forced induction application, and employed Chromium piston rings, Tri-metal connecting rod bearings, high Nickel cylinder block casting, and forged connecting rods, crankshaft, etc. which is why these engines are very capable of supporting doubling of OEM charging pressures as well as longevity. We currently have multiple customers who have installed our APC modifications at 500K miles and are now in excess of 1 million miles!
Thanks again for your interest in our products, and please also note that we offer products from our Ebay store!
Sincerely,
Gary K. at SDI