upgrading my injectors

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Jan 28, 2013 | 07:31 AM

kenlaub88

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upgrading my injectors

so im building my 93 351w and im wondering if i can run 24# injectors without having to do much or anything to my fuel system? i got rid of my smog/AIR/Cat all that nonsense..haha whats the biggest injectors i can run?

Jan 28, 2013 | 07:37 AM

cjben

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From: Midwest

the stock injectors will be fine unless you are building a high horsepower motor and then tuning will be needed for the bigger injectors.

Jan 28, 2013 | 07:53 AM

kenlaub88

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im trying to get 350+ out of her. she has a mild cam, bored 30 over,207/197 valves(i think) i know i have a real high compression somewhere like 12.4 to 1

Jan 28, 2013 | 08:24 AM

Puddy

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From: Edmonton, Alberta

24's are fine, seems to work well for my crate motor. 340 at the flywheel.
Again make sure your tuned for the increase.

Jan 28, 2013 | 08:30 AM

kenlaub88

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do i have to buy a new ecu one or send mine off to be re programmed?

Jan 28, 2013 | 08:35 AM

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by kenlaub88

im trying to get 350+ out of her. she has a mild cam, bored 30 over,207/197 valves(i think) i know i have a real high compression somewhere like 12.4 to 1

Unless it has aftermarket heads and intake you're not getting anywhere near that, and if you do it won't run on the stock computer which is not reprogrammable so you will need a different computer(mustang) and a tuner to recalibrate it. What trans does your truck have?

Jan 28, 2013 | 08:42 AM

kenlaub88

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i know i dont have stock heads, im kinda doing this half blind, half way through my build my machinist passed away and i havent been able to find the paperwork. i know we changed out my heads and put bigger valves, bronze valve guides. i have an e40d

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Jan 28, 2013 | 09:04 AM

Conanski

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Quote:

Originally Posted by kenlaub88

You need to find out what parts are in it or you're completely shooting in the dark here, setting up an engine to run on EFI is hard enough when you know what you got. The heads should have some identifying marking on them and the cam can be measured in the motor if you can't find the spec card, just need a dial gauge and a degree wheel.

As for the computer... with the E4OD you need to find a MAF truck computer, meter, and complete engine wiring harness that you can use to make a subharness to add to your truck, and then you need a tuner module, software, and laptop to dial it in.