Anyone Running 42.5 lb injectors?

**DrSnazzy** · 02-07-2012

hey guys , im going to be picking up a set of 42.5 lb injectors from a guy that i bought my gtp from wen. Im kind of new to modding fuel injected motors (yea ima noob) , what kind of changes should i expect as far as performance, mpg, ect after the car is tuned and all? My stock injectors are currently "maxxed out"

My mods: Smaller Pully For SC
Ceramic coated headers,
no cat downpipe,
3in back to dual flowmaster,
tuned ,
Cold air intake.

**dsmuts** · 02-07-2012

how much smaller pulley do you have? Seems like you don't have enough mods to max the injectors out.

**Ricky21** · 02-07-2012

What size pulley?

**Fivefingerdeathpunch** · 02-07-2012

I highly doubt your stock injectors are maxed.

whats your IDC?????

**DrSnazzy** · 02-07-2012

I have to call the guy and get all the mods he got done, I just got the car like a month ago. Im just going by what he told me as of now, and im probably forgetting some mods . Ill have him send me a list

**DrSnazzy** · 02-07-2012

Originally Posted by Fivefingerdeathpunch

I highly doubt your stock injectors are maxed.

whats your IDC?????

idc? lmao

**Poil336** · 02-07-2012

geeze, if your injectors are maxed on those mods, i'd like to see your air/fuel ratio

**Fivefingerdeathpunch** · 02-07-2012

Whats you injector duty cycle at WOT???

That will kinda tell you if you're maxing your stock injectors or not. And yes, you need a tuner to figure this out.

I bet you are only using ~60% because you arent cammed or even intercooled.

**DrSnazzy** · 02-07-2012

Oh yea i am also intercooled lol

forgot that one sorry

**dsmuts** · 02-07-2012

look on the side of the pulley and see if it says the size

**RegalGS98s** · 02-08-2012

Originally Posted by Poil336

geeze, if your injectors are maxed on those mods, i'd like to see your air/fuel ratio

^this... Probably why he's only getting 13.8 mpg in the other thread. I've only lost about 2 mpg from a bad O2 sensor when the code shows. But will see once the pulley size and mods are listed. If it doesn't say the pulley size, just measure the diameter. Is he selling you the 42.5lb injectors, or is he giving them to you since you bought the car from him?

**DrSnazzy** · 02-09-2012

Originally Posted by RegalGS98s

^this... Probably why he's only getting 13.8 mpg in the other thread. I've only lost about 2 mpg from a bad O2 sensor when the code shows. But will see once the pulley size and mods are listed. If it doesn't say the pulley size, just measure the diameter. Is he selling you the 42.5lb injectors, or is he giving them to you since you bought the car from him?

He is giving me those injectors becuase i got the car from him

**SlowNA06** · 02-09-2012

You don't need those until you drop pulley size below 3.4". 3.2" maybe? Anyway, you'd need at least rockers and an intercooler to go that low. Or a cam. So this is a non-issue. What you need is a good tune.

**DrSnazzy** · 02-09-2012

Right now its 3.3, And i also have a 3.2 but obviously not on the car. @SloNA06 my car is intercooled, the guy dropped those injectors off and the other pully today for me, He is going to email me a Detailed list of all the mods done and i will throw that up on here. The car was tuned by zzp i figured that out today. He also said when they went to the no cat system they dropped one o2 sensor, i have to look and see what one was removed. How could i get this code to go away if the o2 sensor is not there?

**DrSnazzy** · 02-09-2012

Originally Posted by RegalGS98s

^this... Probably why he's only getting 13.8 mpg in the other thread. I've only lost about 2 mpg from a bad O2 sensor when the code shows. But will see once the pulley size and mods are listed. If it doesn't say the pulley size, just measure the diameter. Is he selling you the 42.5lb injectors, or is he giving them to you since you bought the car from him?

right now its a 3.3

**SlowNA06** · 02-09-2012

From what I've seen, generally, Intercooler and headers = 3.4. Maybe you gots rockers?

**DrSnazzy** · 02-09-2012

I dont know man :/

**txslow6** · 02-10-2012

On my previous GTP I didn't max my injectors untill i hit a 3.0 pulley and that was with 1.9's

Have you scanned your car? We need to know what your IDC is.

So you know for a fact the injectors are maxed or are you going off what the previous owner told you?

**DrSnazzy** · 02-10-2012

Originally Posted by txslow6

On my previous GTP I didn't max my injectors untill i hit a 3.0 pulley and that was with 1.9's

Have you scanned your car? We need to know what your IDC is.

So you know for a fact the injectors are maxed or are you going off what the previous owner told you?

zzp told him they were maxed out , just going by what he said. I dont even know what IDC is lol