jthorpe7525

What size injectors does the stock 89 5.0 come with?


What can i upgrade to without doing anything else?

LTnone

19# is stock. Upgrading injectors on a stock or near-stock engine is 100% pointless

jthorpe7525

what upgrades should I do with the injectors?

jthorpe7525

what upgrades should I do with the injectors?

dimebag

dont need new injectors untill close to 300whp... but to upgrade them you need a maf tuned for the upgraded injectors

LTnone

You're not going to need bigger injectors until you're approaching the 300rwhp mark. Since it sounds like your car is completely stock, here's what I'd do to start out:
1. Gears- by far the best bang for the buck mod there is. You won't gain any power, but it'll feel like a new beast. 3.73's for a 5speed, 4.10's if auto.
2. Rear control arms- once agian, no power gain. But, you've gotta get that power to the ground. 3.73's will have no problem burning through a few gears with stock tires. Upper and lower RCA's are preferable, if you only do one set get lowers.
3. Larger MAF- your stock MAF is smaller than your throttle body (55mm and 58mm, respectively). You don't need a bigger TB yet, but you'll gain a bit of power by opening up the intake a bit. You can only flow as much air as the tightest opening in your engine will allow. The MAF will need to be calibrated for 19# injectors.
That should get you started, search for "gears" on the forums and you'll find a million posts about it, all you need to know is in there.