Quote:
Originally Posted by Steve W
There were basically two different 24 pin chip programs used in the U.S. 87 model year, the 1267355236 and 1267355302. The .236 program is the earlier one and idles lower at 800 rpm and rougher like the 84-86 cars. The .302 chip idles a little higher at 880 rpm. Power derived from the .236 chip would be equal to the 207 hp of the 84-86 cars, with the .302 chip at 217 of the 88-89 models. A good chip makes a significant difference to the drivability and everyday usability of your car, along with a smoother idle, more low and mid end torque, more throttle response, better highway fuel efficiency, and a 16-18 hp gain without any detriment to your car.
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I know this is an old old thread, but thought it was better to reply to this rather than start a new one.
Is there a difference in performance between a chipped .236 car and a chipped .302 car? Assuming they both have the same Steve Wong "program" they will have the same performance, correct?
For example a .302 car will gain 6-8hp and a .236 will gain 16-18hp from the chip? or is it 16-18 and 26-28 hp? It seems like the 84-86 cars would get more out of the chip?
If Porsche decided an 880 rpm idle was better for whatever reason, why don't the 24-pin aftermarket chips run the 880 idle? (I installed the 24-pin Steve Wong SSI chip, and my idle didn't change) I know half of the program on the 24-pin cars are on the 8051 chipset, is that the reason?
Does anyone know the rationale behind the 880 idle? Was it higher oil pressure, G50 made it stall easier, just idles better?