I came across some ford racing injectors 42lb/hr and Pro M mass air caliberated for them for 350. Does it matter if it was used for supercharger/cold air/ etc.? Reason asking If you go to JDSperformance.com and look at the maf it has a drop down menu that list Cold air/ supercharger/ Na(factory air box)
Mass senor and Injectors
- Thread starter Djstorm100
- Start date
-
Sponsors (?)
What is your current configuration?
The 42 lb injectors are way overkill for any non pressurized induction 5.0 engine. They are probably too big for anything but a 460 or larger non pressurized induction engine.
They would be good on on a pressurized induction 5.0 running lots of boost, but plan on paying for a custom dyno tune when you go that route.
Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle. These ratings are for naturally aspirated engines.
Example:
19/.5 = 38, 38 x 8 = 304 HP
24/.5 = 48, 48 x 8 = 384 HP
30/.5 = 60, 60 x 8 = 480 HP
36/.5 = 72, 72 x 8 = 576 HP
42/.5 = 84, 84 x 8 = 672 HP
The preferred duty cycle is about 85% maximum, so for a safety factor multiply the final figure times .85.
304 HP x .85 = 258 HP
385 HP x .85 = 326 HP
480 HP x .85 = 408 HP
576 HP x .85 = 490 HP
672 HP x .85 = 571 HP
Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.
See http://users.erols.com/srweiss/ to get the calculators used in these examples.
The 42 lb injectors are way overkill for any non pressurized induction 5.0 engine. They are probably too big for anything but a 460 or larger non pressurized induction engine.
They would be good on on a pressurized induction 5.0 running lots of boost, but plan on paying for a custom dyno tune when you go that route.
Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle. These ratings are for naturally aspirated engines.
Example:
19/.5 = 38, 38 x 8 = 304 HP
24/.5 = 48, 48 x 8 = 384 HP
30/.5 = 60, 60 x 8 = 480 HP
36/.5 = 72, 72 x 8 = 576 HP
42/.5 = 84, 84 x 8 = 672 HP
The preferred duty cycle is about 85% maximum, so for a safety factor multiply the final figure times .85.
304 HP x .85 = 258 HP
385 HP x .85 = 326 HP
480 HP x .85 = 408 HP
576 HP x .85 = 490 HP
672 HP x .85 = 571 HP
Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.
See http://users.erols.com/srweiss/ to get the calculators used in these examples.
Similar threads
