Yesterday I finished up doing some brakes on my 85 Z28. I went for a test drive to seat in the new pads. I was cruising around 40mph and decided to stomp it to see how it would accelerate. (keep in mind this is an on going project car/toy by no means a daily driver) It accelerated quickly for a second then in "bogged down" and surged and the rpms really were not climbing. I eased of the gas and it stopped bogging down and acceletated slowly but smoothly.
Now here is what I am working with. It's a 1985 Z28 Camaro TPI, it came stock with a 305. The guy I purchased it from put a 1986 350 truck motor in it with a mild cam. ( I don't know the specs on the cam) He installed the top end off of the original 305 onto the 350. So the engine has 305 H.O. cast iron heads on a 350 with a stock 305 TPI set up. I changed out all of the engine sensors, distributor, and the computer, incuding the EPROM and CALPACK to a 1985 Corvette 350. The timing is set at 10 degrees. (stock for a 85 vette) The car runs great except for this little "bogging" issue. My question is this, do you think it has the wrong injectors in it for a 350. I know the 305 came stock with the 19lb injectors, and the 350 came with 22lb injectors. I looked at the injectors on my car and cant find any stamped marks telling me what they are. So should I just get some 22lb injectors and call it a day??

Thanks for you help
Tom

 

Don't throw money at injectors yet. Take out the chip. Use the standard chip see how it runs. It's not doing you any good anyway. When you say EPROM and CALPACK I'm assuming a piggy back chip based on your description as the EPROM is ON the calpack.

They should be 22s given that nothing else was changed. Hold off on injectors until you do more troubleshooting.

 

The EPROM and CALPACK chips that I put in my ECU are from a factory 1985 Corvette 350 TPI. Purchased from www.TPIParts.net The 2 chips in the ECU, 1 is small about an inch long, the other is wider, and about an inch and a 1/2 long