Re: A/F ratio question
[Re: astjp2]
#1196697
03/15/12 12:00 AM
03/15/12 12:00 AM
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Joined: Aug 2003
Posts: 43,127 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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I do not know waht a JTEC computer is, sorry I guess I was assuming you where able to change the fuel map with a laptop We all know what ASS U ME means
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: A/F ratio question
[Re: DaytonaTurbo]
#1196702
03/15/12 08:25 AM
03/15/12 08:25 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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have you looked into using SCT to reprogram the computer? you can tweak a lot of stuff in it, but I'm not sure if you can tweak the closed loop modes. my Dakota has a 5.9L 222/228 @ .050, .544 lift, and 107 LSA. it will idle at 14.7, part throttle cruise at 14.7, and at WOT it goes to 12.8 it took several tweaks using a data logger to record what was going on, and sending that to my "program writer" For a little over $300, he sends you the hand held programmer, CD with the programs to put programs onto the handheld, and unlimited tunes for the life of the vehicle, so he'll help you get the tune dialed in, then if you change anything later, he'll help you re-tune it for free. contact Sean Powell, aka "Hemifever" www.hemifevertuning.com or hemifever@aol.com
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Re: A/F ratio question
[Re: 70Cuda383]
#1196703
03/15/12 08:26 AM
03/15/12 08:26 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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By the way, there are a lot of Dakota's running 408 strokers, boost, spray, etc. all using the stock EFI system/sensors and computer reprogrammed with SCT
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Re: A/F ratio question
[Re: 70Cuda383]
#1196704
03/15/12 09:36 AM
03/15/12 09:36 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Also, the computer has a "coast down fuel cutoff" under closed throttle, high vacuum, deceleration, the computer will stop grounding the injectors and fuel delivery stops. This is a fuel economy trick and you can see it happen with a wideband O2. Note factory programming has a 5 second delay before this "kicks in". But with SCTi have mine programmed for a 2-second delay
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