450 rwhp from a 408w - what injectors?

BlackVert

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#1

• Oct 15, 2006

• #1

i'm thinking 42#ers ...

 

T

tlee_20

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#2

• Oct 15, 2006

• #2

in the october '06 mmff they tested the r box with 36lb injectors on a 408 and made 525hp to the crank. so you should be good there with 36's

 

BlackVert

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BlackVert

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#4

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anyone else agree/disagree?

 

95Vert

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...

 

Grn92LX

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#6

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• #6

42's!

 

parchisi

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#7

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Q: What's the meaning of life?

A: 42

 

T

tlee_20

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#8

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• #8

why would you want to waste gas and be rich throughout when you can get the job done efficiently with 36's? everybody thinks that bigger injectors=fast cars... like my buddy running 30lb injectors on a 306 with h/c/i when all he needs is 24's

 

Black95GTS

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#9

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• #9

parchisi said:

Q: What's the meaning of life?

A: 42

Click to expand...

Douglas Adams reference.. nice.

tlee_20 said:

why would you want to waste gas and be rich throughout when you can get the job done efficiently with 36's? everybody thinks that bigger injectors=fast cars... like my buddy running 30lb injectors on a 306 with h/c/i when all he needs is 24's

Click to expand...

You do understand that the quantity of fuel supplied is based on the tune and voltage supplied to the injector, NOT the size of the injector. You could have a stock 302 with 42 pound injectors running perfectly at 13/1.

http://www.witchhunter.com/injectorcalc1.php4

Keeping in mind that stock Ford FP is 39.5, and that you lose 15 percent in the driveline, that means 450 rwhp is something like 530fwhp. 530 fwhp is a perfect candidate for 42 lb injectors. Play with the calculator above and others you can find via Google and I think you'll see that 42 pound squirters are the way to go.

Adam

edit for the douglas adams reference

 

BlackVert

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#10

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parchisi said:

Q: What's the meaning of life?

A: 42

Click to expand...

are you running out of injector with your setup? seems to me you are running a similar combo to what i am looking at.

 

parchisi

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#11

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No, I'm not, but if/when I ever want to install a power-adder i.e. a dry shot of nitrous or supercharger, I'm going to have to upgrade the injectors and fuel pump again. If I could do I over, I would go with the 42's.

 

BlackVert

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#12

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ever do any dyno runs? just wondering how much power that bad boy is making.

 

parchisi

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#13

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Unfortunately, no dyno runs yet. I've found a place up in Denver though that can do it, I just need to find a day to do it. They're only open weekdays and I have school pretty much all day 5 days a week.