What size fuel injector would I need?

Asked by Adam Feb 24, 2016 at 06:38 PM about the 2005 Ford F-150 XLT SuperCab 4WD

Question type: Car Customization

I put a volant cold air intake with a bbk
80mm throttlebody on my stock 05 f150
5.4l. Wondering aproximately what cc
injector I should install to properly adjust
the air/fuel ratio?

5 Answers

10

Adam, You've increased the air flow but remember you have a closed loop system with an oxygen sensor in the exhaust that will tell the computer to adjust the fuel flow (within limits) to achieve the correct a/f ratio over the driving range.

Ah ok. So I may not need to change injectors? Would a dyno run while monitoring the ratio give me the right answers/specs to know if I need to?

10

Yes, you may not need to change the injectors as the computer would tell the injectors to open longer to achieve the correct a/f ratio under most normal driving conditions. If you have the ability to do a dyno run and monitor a/f ratio (or O2 sensor signal) that would be good to do. One area that may be problem would be high rpm & WOT where there may be a possibility the injectors can't deliver enough fuel considering the additional air flow you've added. This is a performance area where you want a rich a/f ratio because of high power demands and high load conditions. Do the dyno run if you can.

1 people found this helpful.
10

Adam, More info. I went to Autorama in Detroit at the end of Feb. and came across an injector supplier named AUS Injection, Inc. Check them out at www.ausinjection.com This info does not constitute an endorsement as I've never done business with them.

Your Answer:

F-150

Looking for a Used F-150 in your area?

CarGurus has 15,725 nationwide F-150 listings starting at $1,712.

Postal Code:

CarGurus Experts

  • #1
    OJ
    Reputation
    42,460
  • #2
    Gene Arnett
    Reputation
    16,040
  • #3
    Rowefast
    Reputation
    15,840
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
171 Great Deals out of 5,940 listings starting at $3,995
Used GMC Sierra 1500
128 Great Deals out of 6,854 listings starting at $3,975
Used Ford F-250 Super Duty
27 Great Deals out of 1,201 listings starting at $8,995
Used Toyota Tundra
47 Great Deals out of 1,145 listings starting at $5,999
Used Toyota Tacoma
54 Great Deals out of 1,033 listings starting at $8,708
Used Dodge RAM 1500
4 Great Deals out of 80 listings starting at $4,000
Used Ford Ranger
15 Great Deals out of 1,439 listings starting at $2,888
Used Ford Mustang
49 Great Deals out of 1,268 listings starting at $4,995
Used Chevrolet Silverado 2500HD
20 Great Deals out of 1,146 listings starting at $8,999
Used GMC Sierra 2500HD
17 Great Deals out of 1,712 listings starting at $12,900
Used Ford F-350 Super Duty
36 Great Deals out of 2,603 listings starting at $8,888
Used Ford Explorer
81 Great Deals out of 2,024 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.