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Help Reading Jb4 On Dash
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01-15-2013, 05:55 PM | #1 |
Private First Class
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Drives: 2007 335i
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Help Reading Jb4 On Dash
okay so im new to this and i searched a bit but couldnt find anything,
if i use my jb4 to read off my fuel and oil temp guage the (boost on fuel, timing on fuel, and air fuel ratio) what should i be looking for like what numbers should the guage be reading at when im at idle or wot etc... just curious any input helps.... |
01-15-2013, 06:02 PM | #2 |
First Lieutenant
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that will vary depending on mods and how aggressive the tune is, All the things you listed are variables dependent on your conditions. For example, I'm hitting 15-16 psi on my current setup but I use map 5 and have other mods. You may be on Map 1 which has a max boost of 12psi. I don't believe there is a straight answer to your question since we don't know the exact conditions you're running.
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01-15-2013, 06:11 PM | #3 | |
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Quote:
if your curious, Boost on fuel lets say, depending on what map you run, you can see what your target boost is and your boost limit. lets say map 1 boost target is 13-14 PSI. Your fuel gauge(showing boost) should be a 0 when your at idle. You build boost when you put rev your engine or when engine is on load. Reading would be 0 mark is 0PSI, 1/2 tank mark is 10psi, and 1(full tank) is 20PSI. So your gauge should show above half way and under 3/4 tank. you'll only see 13-14PSI under wide open throttle. Air fuel ratio on fuel gauge, would be 0 mark-10:1 1/2 mark -15:1 and full tank is 20:1. usual target is around 12-13:1 ratio. you do the math. |
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01-15-2013, 06:16 PM | #4 | |
First Lieutenant
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01-15-2013, 06:22 PM | #5 | |
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Quote:
yea i was looking for that part where you said it should be around 12-13:1 now i know what to normally look for, the reason i asked this is becuase my car took a s*** on me the other day and after reading the codes i had a misfire in ever cylinder besides 4 and 6 some one told me to be careful its not timing issue. thats why i wanted to see what i should be looking for if im reading timing on fuel.. |
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