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injectors, when to upgrade?

  • Thread starter Thread starter cwdunnet
  • Start date Start date Aug 13, 2005
C

cwdunnet

New Member
Aug 12, 2005
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toronto
Aug 13, 2005
#1
  • Aug 13, 2005
  • #1
i have 19 lbs, and i was wondering when should i upgrade to 24 lbs, and will do do anything performance wise? what else to ihave to do if i upgrade to 24 lbs, thanks
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
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128
Saint Louis, MO
Aug 14, 2005
#2
  • Aug 14, 2005
  • #2
I doubt you need to upgrade - but the only way to tell is to get a dyno done with a wide band so you can see what A/F is really doing.

Upgrade injectors when you have fuel pressure up to 44psi and can't maintain 13-14:1 A/F ratio.
 

DMAN302

My mom says thanks for the pearl necklace.
Nov 8, 2003
2,120
2
59
windsor, Canada
Aug 14, 2005
#3
  • Aug 14, 2005
  • #3
Often I have heard the general rule that you upgrade injectors after your making aprox 350 flywheel horse power. A/f is the ideal approach but not available to everyone. Your present setup will work well with the 19's...24's will only serve to lighten you wallet with your combo.
 

tmoss

Gettin Wired
Founding Member
Jun 28, 2001
7,153
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128
Saint Louis, MO
Aug 14, 2005
#4
  • Aug 14, 2005
  • #4
DMAN302 said:
A/f is the ideal approach but not available to everyone.
Click to expand...

Then it's a shot in the dark, but doable. The EEC adpative control feature will make adjustments if the injector over/under sizing is within the EEC adjustment band.
 
M

Matts89LX5.0

Founding Member
Nov 1, 2002
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Long Island, NY
Aug 14, 2005
#5
  • Aug 14, 2005
  • #5
i always thought 19 # inj were good upto 300 hp motor....i would do the entire fuel system if i were you...24# inj, 75 pro m meter, and 255 in tank pump
 

notchback

Founding Member
May 30, 2000
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St Clair Shores MI
Aug 14, 2005
#6
  • Aug 14, 2005
  • #6
Matts89LX5.0 said:
i always thought 19 # inj were good upto 300 hp motor....i would do the entire fuel system if i were you...24# inj, 75 pro m meter, and 255 in tank pump
Click to expand...


thats way overkill. if you anticipated needed it , then when it's time to upgrade yes. but i ran 12.50's all day long w/ 19 lb'ers and a 190 and it ran flawlessly.
fp guage up on the hood and it never looked weak at all.
 
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