I am buying a friends 98 trans am with cam and intake and was wanting to install a 75hp dry shot to push it deep into the 11's, It has currently ran a best of 12.08 at i beleive 111 mph. He said his stock injectors are already at 92% duty cycle and did not know if i would need to upgrade to maybe some 30lb ford injectors. I have some 42 lb injectors on hand i was about to sell but i may just trade for some 30lb injectrs if needed. Also with this 75 shot do you beleive i could cut a 11.5 time.Any expertise would be greatly appreciated. Thanks, Jason

 

If you look at Robert56's injector sizing charts, you'll be able to choose your injector size for your desired or expected hp.

 

Put the 42s in and have some room to grow, then you can hit your ET goals if the 75hp shot doesn't do it. The 42s will run fine.
Robert

 

I am friends with the guy i am buying the car from and he said it would be difficult for him to tune the car with the 42 lb injectors due to the duty cycle of the injectors being pretty low with the fuel pressure he is running currently. I do not know anything about his tuning software , i just recently sold an lt1 car with obd1 so the tuning will be totally new to me.

 

Thanks, Robert i am going to install the 42's have my friend tune the car and see where it is.