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  • 1996 - 2004 SN95 Mustang -General/Talk-

To upgrade injectors or not to upgrade?

  • Thread starter Thread starter Warshark
  • Start date Start date Feb 22, 2019
W

Warshark

New Member
May 31, 2018
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San Antonio,TX
Feb 22, 2019
#1
  • Feb 22, 2019
  • #1
Hello all! I have reached the end of my new engine build on my SN95! I am in need of some advice on injectors wether or not I should upgrade them to 24lbs or not. It currently has a overhauled bottom end, ported and polished trick flow 170 twisted wedge heads, trick flow lower and upper intake, OEM 19lb 4 port injectors, BBK 225lph fuel pump, BBK fuel regulator, BBK throttle body, long tube headers, Bama 4 bank eliminator, and a ford e303 cam. The engine is just about ready to be put back in the car but I am concerned that the 19lb injectors may fall short on the performance side. Hoping some of you might have insight on this! Thanks a bunch!
 

Dark04GT

10 Year Member
Apr 27, 2008
758
62
59
NC
Feb 23, 2019
#2
  • Feb 23, 2019
  • #2
Back when I made 290rwhp with full boltons and cams I upgraded to 24lb injectors and found the injector duty cycle to be “just right”. Duty cycle had some buffer, remaining well below 90%.

Your setup seems like it is in the same ballpark. The 19’s don’t provide much buffer or any buffer when you are at the upper rpm range.
 
W

Warshark

New Member
May 31, 2018
8
0
1
San Antonio,TX
Mar 10, 2019
#3
  • Mar 10, 2019
  • #3
Thanks for the reply! would you recommend upgrading to the 24lbs? As well it looks like I will be pulling the engine out again. I had found a cheap donor 5.0 had the crank turned and cylinders honed. Long story short started it up for the first time today to hear a lovely knocking sound :,(
 
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