- Mon Dec 05, 2016 8:13 pm
#14938
The EFI ITB setups I've worked on were BMW M series, and all used mass air flow, not MAP. The others were carbed 2 cycle outboard engines.
However, everyone I've seen has had a 'balance tube' (for lack of a better term) that shared vacuum between the throttle bodies (circled red in the picture). This is also where the vacuum for accessories is derived. The connection to the throttle body bores isn't large enough to affect the idle setting for each (for example), but it is large enough that it does show engine vacuum changes accurately on a gauge. Could you not use that tube to measure MAP and use the Cycle Average MAP setting in TunerStudio?
I would think this might be the place to start experimenting.
However, everyone I've seen has had a 'balance tube' (for lack of a better term) that shared vacuum between the throttle bodies (circled red in the picture). This is also where the vacuum for accessories is derived. The connection to the throttle body bores isn't large enough to affect the idle setting for each (for example), but it is large enough that it does show engine vacuum changes accurately on a gauge. Could you not use that tube to measure MAP and use the Cycle Average MAP setting in TunerStudio?
I would think this might be the place to start experimenting.
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