Something For You Guys To Think About Before You Throw On Bigger Injectors

[Yellow95]

These are fuel pressure readings from my 97 T-5.

Idle fuel pressure (16 inches of vac) 38 lbs

0 vac 45 lbs of FP

7 lbs boost- 52 lbs of FP

15 lbs of boost- 60 lbs of FP.

When injectors are rated for lbs per minute or cc's, they are rated at 32 lbs of fuel pressure. At 60 lbs of pressure, you are almost doubling the fuel output. of each injector. I am not saying that none of you need bigger injectors, but I am saying dont go bigger unless a wideband says you are leaning out.

My .02

Gary

[WhiteT5]

I am not saying that none of you need bigger injectors, but I am saying dont go bigger unless a wideband says you are leaning out.

Unfortunately, most seem to go for the bigger injectors before the wideband.

[Gioseppe]

Unfortunately, most seem to go for the bigger injectors before the wideband.

haha, orange inj crew ftw!

[thelostartof]

ya'll need to stop talking trash before The rwd guy whoops up on both of you

and i'd rather have a engine tuned for larger injectors and running on them so as to not run lean on spikes and incase boost goes off map and things risk running lean

[Zulu]

Ignoring the fact that those injectors are running at near or 100% duty and will likely fail at an extremely increased rate.

[Mogatu'r]

ya'll need to stop talking trash before The rwd guy whoops up on both of you

and i'd rather have a engine tuned for larger injectors and running on them so as to not run lean on spikes and incase boost goes off map and things risk running lean

Then boom, there goes the rods!

[JCviggen]

While under boost they also have to overcome the manifold pressure...the reason why FP goes up with boost in the first place

[JHEIII874T5M]

Ignoring the fact that those injectors are running at near or 100% duty and will likely fail at an extremely increased rate.

+ :pizza:

[Yellow95]

Hmmm, I have my injectors on my KB set to go stagnant (wide open) at WOT. Been like that for 6 years. Ford must make really good injectors. Besides, I hardly think my injectors are at 100% duty cycle on the volvo.

Gary

Ignoring the fact that those injectors are running at near or 100% duty and will likely fail at an extremely increased rate.

[Yellow95]

Then boom, there goes the rods!

Wow, then I must be bending rods every time I hit the fuel cut. My rods are now pretzels huh? I feel so dumb now.

You cant honestly think that throwing injectors at the motor without knowing your A/F is smart. Didnt say that there is no way you need bigger injectors, but I am saying 98.9% of the people on this site dont.

Gary

[FIORE]

Wow, then I must be bending rods every time I hit the fuel cut. My rods are now pretzels huh? I feel so dumb now.

You cant honestly think that throwing injectors at the motor without knowing your A/F is smart. Didnt say that there is no way you need bigger injectors, but I am saying 98.9% of the people on this site dont.

Gary

Dont forget man, the assholes rule Volvospeed. People with knowledge or proven data get shunned by others or banned from the site altogether so watch your back man.

[Volvokiller]

FWIW - I ran both 315cc and 350cc injectors on my car with a wideband reader. The AFR's didn't change at all. Both still provided too much fuel under boost - a function of the ECU (IPD/TME) no doubt. However, duty cycle is an important variable in injector performance. An injector running at 80% is providing a much more uniform spray than one running 100%. I went with the 350's in my car.

[the underlørd]

Dont forget man, the assholes rule Volvospeed. People with knowledge or proven data get shunned by others or banned from the site altogether so watch your back man.

?

<-- has stock injectors. WHY? Cause I don't need anything more... said it then, i'll say it again.. I don't see myself getting banned anytime soon.

[javadoc]

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<-- has stock injectors. WHY? Cause I don't need anything more... said it then, i'll say it again.. I don't see myself getting banned anytime soon.

Stock being 350cc's instead of orange 315s like 850 owners drive, though.

This will be debated until the cows come home, however, so have fun. I'm running blues, and I still need to get my datalogging set up so I can know exactly what's going on. Until then, I have no opinion.

[Che'_Moderator]

Dont forget man, the assholes rule Volvospeed. People with knowledge or proven data get shunned by others or banned from the site altogether so watch your back man.

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