turbo questions fpr 2.3

[Wicked_Sludge]

14's are small even for the stock 112HP, im pretty sure they are 19's. either way, they arent good for much over stock. ford knew what they were doing when they matched fuel injectors to their vehicles, and theres isnt much "extra" in them.

the formula for calculating injector capacity is:

(# of Cylinders x duty cycle)Fuel injector size
----------------------------------------------------------- = HP
BSFC​

ford uses a safety margin of 80% (.80) for fuel injector duty cycle.

BSFC (brake specified fuel consumption) is best gathered on a dyno..but lacking that, we can assume .45 for n/a motors, .5-.6 or so for forced induction applications.

if we look at the factory setup:

(4 x 0.80)19
----------------------- = 135HP
.45​

that means naturally aspirated, 19lb injectors can carry 135HP (14lbs injectors are about 99HP, 13HP under the rated output). force induced engines have higher BSFC's because compressed air is hot and thus, less efficient. so those 19lb injectors will only support about 125HP under boost.

a 112HP engine boosted 10PSI can expect around 188HP (this is a close assumption, theres no way to accurately calculate power from boost). so if we re-arrange our original equation a little:

Fuel injector size = (HP X BSFC)/(# of Cylinders x duty cycle)

we get:

(188 x .6)/(4x0.8) = 35.25

so 10 PSI of boost would be safe with a 35lb/hr injector (or whatever is closest).

 

[Bryan22]

good answer!

 

[poopernickle]

yeah they should easily 7+ pounds but idk? and i work at this shop that is all they do is turbo cars. and yes it is my personal truck, why?

 

[Wicked_Sludge]

like i said, the stock injectors are good for about 125HP...or about 2PSI of boost.

i didnt ask if it was your truck, i said "its your truck", meaning i cant make you build it right...you do it how you want. all i can do is tell you how it SHOULD be built.

 

[poopernickle]

ow do u know about my truck? do you have a 95? i also have the weird version that has 2 spark plugs per cylinder, and from what i researched i cant run pretty much what im looking for?

 

[Mutant Pony]

Couple things, There is a turbo 2.3 forum here with many people who have turboed 2.3s.
Also, Roush racing had a 2.3 destroked to 2.1 making 650 hp with a single turbo. The cars were raced in competition and were successful. I have a write-up here somewhere, It should be available somewhere on the web though.
Ok, the proper forum is "forced Induction"