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      01-15-2013, 08:11 PM   #3
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Drives: Three Hundred and Thirty Five
Join Date: Jul 2010
Location: Yonkers NY

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2007 BMW  [3.50]
Originally Posted by elig0nzal3z View Post
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....
if you dont understand what it means, maybe its best if you just keep it off.

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.