24 or even 30# injectors possible?

[MadMatt5oh]

I have 19 # injectors I suspect are bad. My engine is stock but wont be for long. I know I can use 24's but can I use 30# injectors if I lower my fuel pressure? I have an Aeromotive adj FPR

 

[Michael Yount]

You'll need a recalibrated maf to use the different size injectors. The pressure should stay at the stock level.

 

[86Cobra]

Why do you think your injectors are bad? More than likely just dirty.

You can usually pick up used 19s really cheap.

 

[MadMatt5oh]

Guys, Im still using my speed density computer. I suspect I either have injector(s) that have broken or missing Orings or are Stuck open. They were just dumping fuel into my motor! The car has terrible throttle response, and wont make it past 3k rpms under load. I have all new ignition and a FPR.
I dont want 19's because I plan to upgrade.
So, I guess I'll go with 24s? I cant use any higher than that on a stock speed density motor? I have the MAF Stuff but I'd like to wait until Im ready for mods

 

[slick88GT]

if you put 24s on that sd setup you will just be dumping fuel into the motor, it will run way too rich. If you have the stuff for mass air, convert it now, but if you want bigger injectors you need a diff meter. I've got ported heads, intake and a bigger cam and am running stock injectors because im still speed density. A guy on here has the same setup as me and put 24s in his car, ran waaay too rich. I just bought a mass air computer and am going to convert mine this weekend, I would suggest that you do the same.

 

[shttygtstang]

i dont know if this helps but i thought i had stuck injectors and it wasnt my fuel preasure regulator was shot the diaphram was no good inside and was pissing out the vacum side into the plenum it might not be your case but i thought it would help ya

 

[MadMatt5oh]

scored a set of 19s for 25$. We'll see if that solves the issue

 

[Michael Yount]

Matt - the SD motor will have to be converted to mass air if you want to change the injector size; and then a properly calibrated maf will have to be used with your upgrade in injector size.