jjp278

I plan on putting a supercharger in my car and how do i know what size injectors to put in. In addition, what effects do fuel injectors have on the car other than dumping more fuel in.

samseed101

https://mustangforums.com/m_1111917/tm.htm

Here is an example using a 300 HP car with head work,
(300*.45) / (8*.80) = 21.09
Since there are no 21.09# injctors, step it up to 24# injectors

samseed101

Just like you said, they just add more fuel. Or more accurately, they allow you to add the correct amount of fuel if you previously had undersized injectors that couldn't keep up with the demand. Just remember to get a bigger fuel pump to keep up with the demand as well. Also, when you get larger injectors, you either have to tune your MAF to the new size or you have to get a new MAF that is already calibrated to the correct size.

jjp278

I feel dumb asking this but what is an MAF. Also, is it bad to go to big on fuel injectors.

samseed101

MAF = Mass Air Flow. It's the big round tube that houses the MAF sensor. It's just before the Throttlebody and after the CAI or whatever intake you have.

Yes, going too big can be a problem (depending on how big you go.)