Okay so the whole story behind this is i bought my 1987 Iroc-Z Camaro about 2 years ago. well i didn't know **** about them and now im just getting way over my head to be quite honest. the motor is a

357 TPI (0.40) over.
Intake and exhaust
Vortec heads. 1.94 INT 1.5 EHX valves
211 int 211 ehx camshaft. 440 lift. bigest i can go with computer i believe.
hyperutectic pistons
SCAT 9000 crankshaft.
Block has been 0.40

Now im just getting into the computer stuff. and well the car was originally a 305, guy who owned it before me turned it into a 350 well, im not sure if he switched out the PROM chip. i got underneath passenger side dash pulled the chip out and it looks different and has different numbers then anything i can find. someone please help??

The top big black chip says.
Aimel
AT29c256
90pc
0449

Smaller green one says

7 CTS8620 1
8 16055375 14

and small black chip

16055376
6717
And also the same numbers are on the side.

so any help please?

 

The chip is an Atmel flash PROM. So most likely it has had some tuning done to it. I say most likely as it is always possible that a stock calibration is in the chip.

Note that the chip in is the socket backwards which will put the ECM into limp mode.

RBob.

 

Yeah thx i just realized that after i took the pic haha. okay good im glad to hear that tho. i wasn't sure if i need to change this out or not.