Hey i have a stock 305 TPI 89 Trans am. i want to replace the stock injectors. what Lb. injectors shoul i buy? i don't know a lot about these things so any help would be much appreciated. thanks a lot.
Senior Member
Stock ones I believe are 19# for 305's. The 350 cars got 22# injectors.
Bob
Bob
TGO Supporter
If you are not planning to do any PROM recalibration you should stick with #19 injectors. If you are planning on doing other modifications in the future you may want to go bigger, but you must recalibrate the ECM or you will run rich.
I have #30 injectors in my 305, but it is modified and has a custom PROM that was reprogrammed a few times to get a good air/fuel ratio.
I have #30 injectors in my 305, but it is modified and has a custom PROM that was reprogrammed a few times to get a good air/fuel ratio.