HELP! injector swap gone bad?

[Stangbangin]

well the gt40 crate motor with aluminum heads might put 340 to the flywheel. I could see it putting down numbers around there. Injector ratings are based off flywheel horsepower if I'm not mistaken.

 

[95 svt cobra]

yes it was at the flywheel but either way this motor was dyno'd at 340 and injector size is at flywheel i think too

 

[Paul]

So if the car was running fine on 24s, and 24s do indeed supply adequate fuel, why did you swap to 30s?

FWIW, I'm running 19s on my 306 with a trick flow top end and a TFS1 cam. It's going to be a little high on the duty cycle, but I surmise still adequate.

Paul.

 

[95 svt cobra]

well my car actually is running better now tha ti have larger injectors, MINUS the severe idleing issues, i just adjusted my idler screw on the TB so it idles around 1k at least till i get my MAF in. BUT on the other hand believe it or not, i have noticed a slight power gain which i was surprised to even feel. and hopefully this weekend if not next i will be taking my car to get it dyno tuned cause i know it needs it fairly bad

 

[Schiffy]

yeah well you may be right on that but sometimes its better to learn the hard way. ill check the tps but im jsut going to get a summit maf probably thats already cal. for it

If you say so... not always the best way... learning the hard way can be a really expensive training tool.

 

[Downshift]

yeah well you may be right on that but sometimes its better to learn the hard way. ill check the tps but im jsut going to get a summit maf probably thats already cal. for it

If you say so... not always the best way... learning the hard way can be a really expensive training tool.

Especially with cars and your crate engine...

Let me get this straight. You put 30#s into a car that only thinks it has 24# as in no tune, no hand held, and not even a band aid "calibrated" maf? Just leave the 24s in until you can get the car to at least know somehow it has 30s. Otherwise you are pooring fuel in and gonna be running WAY to rich. If you are that worried about the 24s just dont stomp on the throttle and it wont be a problem...

 

[Schiffy]

maybe if he keeps driving it with the bigger injectors dumping all that fuel, it'll wash down the cylinders and then get in the oil, when it reaches it's flash point the whole car will make a big flash... :whip:

 

[carbed94]

i dunno i was just wandering because one of my buddies has a 92 trunk car with a trick flow top end kit it was like this when he bought it had 24# injectors and he swaped the 19s back out and the maf and it picked up 5 tenths in the quarter...but i dunno i was just think 30s was a little big

 

[Paul]

30# injectors are indeed too big and unnecessary in that application.

 

[95 svt cobra]

all these things are factors, yes i know. I have personally contacted Ford Racing, which i did yesterday to back up my decision to upgrade to 30# injectors. They said and i quote "upgrading to that size would benefit you more than harm as long as you get a matched MAF or a tune done, we actually recommend 30# for this crate motor but advertise it with 24# so its easier to just do a drop in with stock materials". Im not trying to be a smartass at all, and in fact i was just wanting info. SO i figure that since ford motorsports designs and sells this motor that they would know what is best for it and what not. thanks anyways though for the help and encouragement

 

[Downshift]

all these things are factors, yes i know. I have personally contacted Ford Racing, which i did yesterday to back up my decision to upgrade to 30# injectors. They said and i quote "upgrading to that size would benefit you more than harm as long as you get a matched MAF or a tune done, we actually recommend 30# for this crate motor but advertise it with 24# so its easier to just do a drop in with stock materials". Im not trying to be a smartass at all, and in fact i was just wanting info. SO i figure that since ford motorsports designs and sells this motor that they would know what is best for it and what not. thanks anyways though for the help and encouragement

Hey it's all good to put those in, its more than you need but you can put em in. The only thing I think most of us were scratching our heads on is that you put them in without any kind of way to control them since they are bigger. Especially when Ford puts them on the engine to begin with. If you put them on and got a tune or Maf I don't think half the people would have even said anything. Good luck. Get that maf or tune!

 

[95 svt cobra]

yeah i think your right, my maf arrived this afternoon, i know i posted before about swapping maf's but i guess i shoulda put that in this post :crazy2: hopefully ill see something when i get this thing put in

 

[Downshift]

yeah i think your right, my maf arrived this afternoon, i know i posted before about swapping maf's but i guess i shoulda put that in this post :crazy2: hopefully ill see something when i get this thing put in

Cool man let us know how it goes.

 

[95 svt cobra]

OK so i got my MAF in and let me tell you what. My car is running alot better, the idle quality improved so much, i dont have the surgeing on cold start anymore, and you can really hear my cam alot more distinctively now its sweet. Im thinking i want to advance the timing a bit, im not sure how much but its a start. My car woke up a bit more its nice. the throttle response is a tad bit touchier than before which is nice. its running like a new car but alot more performance wise. Im glad that i did this injector swap and went through all the trouble. Now its time to get er to the tuner so i can really make this car scream. uttahere:

 

[Paul]

and you can really hear my cam alot more distinctively now its sweet.

WTF? :uglystupid2:


LOL.

 

[95 svt cobra]

i mean that as in my idle has smoothed out therefore it idles at the correct rpm and my cam is more distinct :ass3:

 

[Trickflow.GT]

i mean that as in my idle has smoothed out therefore it idles at the correct rpm and my cam is more distinct :ass3:

ie. it idles where is should at around 700...instead of 1100 where it was before right? :wall:

 

[Schiffy]

:hammer:

 

[95 svt cobra]

i mean that as in my idle has smoothed out therefore it idles at the correct rpm and my cam is more distinct :ass3:

ie. it idles where is should at around 700...instead of 1100 where it was before right? :wall:

that be correct massa :chef3: