Thread: 550cc inectors question

my ecu is program for 50lbs msd 525cc but i have 550cc rc's..........car break up at 3000 rpm.................... but is just 25 cc diffrence...............is there any way i could get this to work?

yes your running super rich. Get the ecu tuned for the injectors and be done. There is no quick fix besides running the proper injectors or program. Even If you bought a safc2 which will cost more than your reprogram you will need to tune the ecu with a wideband to fix your issue. Not only are you running rich but the program for msd injectors will have different values for the injectors then what you are running. I have seen a program setup for nismo injectors not run correct with injectors of the same size because the injectors had different values(lag time).

ok so i would just get 50lbs injectors............ thanks again i bought the 550cc i thought it was 50lbs

I actually would get a reprogram and use the larger 550cc injectors. the reprogram will only cost $100.00. The msd injectors will require a different fuel rail(top feed) and changing the injector harness clips.

every injector has a different pulsewidth and latency. you may have two different brand injectors that are the same size but the latency will not be right and you'll never get the car tuned right.

ok im running wolf now & also i have a stock ecu .........so i thinking of sending my stock ecu to calum to have it right...........u guys said it only $100?

No its 100 for jwt to re tune your jwt chip.

I have the jwt 72lb program and i will be running 625cc injectors, i will see how it runs, i have an afc, and i also could hook up an emanage if the afc doesnt work well. I will find out in about a week or so.

no it will run $100 for the jwt reprogram. Calum will have to install a daughter board into your stock ecu. I can't remember what it cost for calum to do my ecu but it was not bad less than $300.00. You can also try contacting andreas miko and see if he can get jwt to just send the new chip. Jwt is funny about just sending out the new program chip for some reason.