Fuel injectors
Thread Starter
Race Director
Joined: Mar 2006
Posts: 10,477
Likes: 4
From: lockport n.y
Fuel injectors
My02 A4 has a Vortex intake, ported Fast 92 fuel intake, cam, ported and polished heads , 160 thermo LTHs high flow cats, xpipe and stingers would larger injectors do any good for this set-up?
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
You want injectors working at 80% duty cycle when your "ON" it. If your running LEAN at WOT then maybe bigger injectors will help. You need to get it to a tuner to see for sure.
Last edited by dougbfresh; Dec 24, 2009 at 04:26 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Find someone in your area that has EFI Live or HP Tuners and have them data log your engine. The DUTY CYCLE will let you know if your injectors need to be larger. If they do,,,you will need to have the PCM tuned to the new injectors. 
BC
BC
Drifting
Joined: Oct 2002
Posts: 1,773
Likes: 66
From: SoCal
With those mods, especially the cam (not sure of how big of a cam you have) it is possible you will need larger injectors. Big question.....Since you have these already, wouldn't the tuner of scanned it already and told you if you needed larger injectors?
