Jumped to 24lb injectors in my 88 5.0 runs rough

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07-14-2006, 12:57 AM

#11

hotstang_88

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Join Date: Jul 2006

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

No cats, H Pipe, 40 series Flowmasters, K&N kit, and 3.55 posi

07-14-2006, 01:10 AM

#12

silver91gt

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

Quote:

ORIGINAL: duslep

Silver 91, what upgrades do you have?

everything but forced induction

speed density computers have programmed fuel tables that are made for the stock engine, if you make it breathe better then it will run lean because it cant see the changes you make.

mass air computers measure the air your engine takes in and changes those fuel tables based on running conditions.

07-14-2006, 01:12 AM

#13

silver91gt

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

Quote:

ORIGINAL: hotstang_88

No cats, H Pipe, 40 series Flowmasters, K&N kit, and 3.55 posi

you dont need bigger injectors until you have some major modifications done.
the stock injectors are good until around the 300rwhp mark.
you probably have 190-200rwhp

07-14-2006, 01:21 AM

#14

hotstang_88

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Join Date: Jul 2006

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

Well they are in now and I plan on adding other mods to take it to 300+hp just need to know a good place to get a new chip or how to re-program my current computer.

07-14-2006, 01:25 AM

#15

duslep

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

He'd have more than 190-200 horse wouldnt he? hed have like 225 stock right?

07-14-2006, 01:36 AM

#16

FullAuto

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

There are always guys selling 19lb injectors cheap. Find a set for cheap and just switch back.

07-14-2006, 02:41 AM

#17

Twister

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

Quote:

ORIGINAL: silver91gt

you will have to get a chip burned if you change to different injectors on a speed density stang.

it wont run right with 24# injectors because it is still sending the same pulsewidths for the 19# injectors.
it is spraying way too much fuel.

BULL PUCKY! I have 24#er's, an Accufab fuel preasure regulator and a Walboro 155lph pump, stock chip

07-14-2006, 02:45 AM

#18

Twister

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RE: Jumped to 24lb injectors in my 88 5.0 runs rough

Quote:

ORIGINAL: silver91gt
speed density computers have programmed fuel tables that are made for the stock engine, if you make it breathe better then it will run lean because it cant see the changes you make.

true, but with a differnt intake and heads, the 24#er's will work better. Without a adjustible fuel preasure regulator there is no way to adjust the air mixture properly.

07-14-2006, 07:26 PM

#19

hotstang_88

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Join Date: Jul 2006

Posts: 8

RE: Jumped to 24lb injectors in my 88 5.0 runs rough

ORIGINAL: Twister
BULL PUCKY! I have 24#er's, an Accufab fuel preasure regulator and a Walboro 155lph pump, stock chip

What do you have the regulator dialed in at?