Re: 90 spg apc box questions - Saab 900 Bulletin Board - Saabnet.com
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Re: 90 spg apc box questions
Posted by SWEDISH DYNAMICS [Email] (more from SWEDISH DYNAMICS) on Fri, 30 Nov 2007 12:24:32
In Reply to: 90 spg apc box questions, John Daikh, Fri, 30 Nov 2007 01:31:08
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John,
The Mitsubishi TE05 turbocharger has a larger turbine and more efficient compressor wheel than the earlier Garrett T3 but has a smaller turbine A/R which can become restrictive with any engine enhancement at 230+ BHP. For OEM use, the Mitsubishi should provide more low end engine rpm torque (quicker spool) than the 900 T3 Garrett.
SAAB offered 3 different APC systems during your era and all had only a 1 psi differential between one another. The base APC systems were employed on standard turbo model 900 while the SPG saw a 1 psi improvement through potentiometer adjustment. SAAB also offered the tuning kit which included a 185 BHP APC system which was altered via interal resistors and only a modest 5 BHP gain over the SPG APC.
Best of luck and regards,
GaryK at SWEDISH DYNAMICS,INC.
http://swedishdynamics.saabnet.com
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