26 to 28lbs injectors
26 to 28lbs injectors If you changed from 26 to 28 lbs injectors would the car run? Would this make the car run lean at cruise and really rich at wot? I started tuning a car today that was doing this and then found out it may have 28lb instead of the stock 26lbs. The duty cycle was hitting 128% at wot @6800 rpms.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
yes it will run... but the fuel trims will be in use to get it to run properly and WOT fueling will be off....
28lb instead of 26lb will cause a rich condition ... so if it's 128% duty cycle at 6800 RPM, it needs bigger injectors
why do you think it may have 28lbs instead of 26? and what is the IFR table set at (a car with 26lb injectors set to a 28lb IFR table willl run lean... )
28lb instead of 26lb will cause a rich condition ... so if it's 128% duty cycle at 6800 RPM, it needs bigger injectors
why do you think it may have 28lbs instead of 26? and what is the IFR table set at (a car with 26lb injectors set to a 28lb IFR table willl run lean... )
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yea, it will run a little rich at idle, but for the most part, the trims even it out.... i wont say who, but someone you know locally went for awhile with 28s and the PCM set for 26s..... no real probs other then the trims being farther out.
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not to hijack but the injectors are not supposed to run over 80% right. if you are over that then its time to upgrade? im at 106% at 6k not sure what its at 6.5k but i think its time for larger ones.
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
^^^yes, 80% duty cycle is the max you should go for... they can run higher (can even provide fuel as in your case at > 100% duty cycle) but it can be risky
at 106% duty cycle w/a 99 (26lb/hr injectors) I would look into some SVO30s (or bigger if you plan on doing alot more mods)
at 106% duty cycle w/a 99 (26lb/hr injectors) I would look into some SVO30s (or bigger if you plan on doing alot more mods)
ok well thanks i am going to be doing heads this summer. no N2O and no FI so should i go for SVO30s or the 42s? the 30's are like 36 at 3 bar right like the LS1's run corredt and 42's are what? again sorry for hijacking this. thanks for the help.
nick
nick
