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#1
22nd November 2014, 01:08 PM
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yeah removing the air filter would produce that sort power...;-)
no i was referring to the little windmills that were fitted to the carb venturi and the same thing fitted to the tail pipes of exhausts......... its not an issue for me but the OP asked how good it was likely to be, they are as i said mostly a con. 
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#2
22nd November 2014, 03:16 PM
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This is not a resistor mod but a tuned mapping table chip.
As I mentioned earlier it proably won't improve power, but will possibly make for better drivability Tuning chips can take advantages of things not in place or known when the car was manufactured. In the case of the 2.9 Cologne, 4 Start was still the fuel of choice, it no longer exists. TT
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#3
28th March 2020, 07:42 PM
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that is an early Piggy Back tuning chip for the ford EECV or whatever ford called the early EFI ECU's
the principle is that ford left a port or bit on the edge of the ecu PCB behind a bit of plastic that could just take a new program/map should it ever be needed the only issue is when the power is cut the tune reverts back to the one in the main chip hence why you had to leave them in. i think the turobotechnics fords where done this way? superchips and other co's used this unused ford option exploited it and made their on piggy back units to take aftermarket tune up chips there is a similar thing with extra chip holes in 80-90s jap cars
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