stangdad813

Can anyone please help me....
1998 GT, stock 19lb injectors. Swap to PI ported head + intake. Bolt on's include cold air intake, under drive pulleys.
Can anyone tell me if they think i'll be making enough hp to max out the stock injectors? I was thinking I may have to upgrade to 24lbs. I do not want to take the chance on any detonation.

MU71L4710N

PORTED heads? or plain PI heads? if you were talking about just plain PI heads then 19lbs will be fine. if your doing ported heads i'd consider putting some 24's or better in since you'll be maxing the 19's out if you do any other mods (like longtubes or cams).

mrtstang

So, you have "ported" PI heads, and intake, but NPI cams... or what??? What other mods do you have? Depending on what you actually have here, you could be riding the razors edge with the 19's. You need to be a little more specific.

stangdad813

cams are from the ported 04 heads

stangdad813

I got a set of ported heads with the cams and intake from a speed shop here in town (there installed now). They are from an 04. No other mods done yet. Perhaps in the future I may go to stage 1 cams or put on an aftermarket air intake, but for now thats it. I'm nearly finished the car and have a shop in town that's going to perform the tune. But I've been reading that 300hp at the motor is about the max for the stock 19lb injectors. I just wanted to see if that hp ratio is correct and if so what would you guess the hp will be after these mods.

Thanks

mrtstang

So, no headers, udp's, tb/plenum, ect? If not i'm guessing you'll be okay. Otherwise you're probably pushing it.

stangdad813

no headers, but i did forget to mention the H-pipe and no cats

5sp04GT

id upgrade now sounds like your going to surpass what they r good for if not now than in the future.

stangdad813

So would 30lb be overkill? And does it even matter if there too big? As long as there not too small I should be okay right?

stangdad813

haha... one more thing... should i also upgrade the maf, and to what size

Thanks