What years had the removeable chips, and which years had the re-programmable computer.

If I remember right??.... up to '89 had the chip that could be replaced..... and the 90+, you had to reprogram the computer for performance.

Which is cheaper to upgrade?

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1978 Y-88 TA
1993 454SS
***Looking for a 88-92Z***

 

It's all wrong actually. You can remove the chip and reprogram it for any computer controlled thirdgen. For TPI cars: up to 89 they used the MAF system. In 89 VATS was added and a 6E calibration was used (a little better then the previous one) and from 90-92 a speed density system was used which used a chip twice as big (memory wise).

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1991 Z28

 

GM switched to programmable computers in the LT1's in 1994. 1993 and older LT1's, TPI, TBI, etc all use removeable chips that can be erased and reprogrammed.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
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