Quote:
Originally Posted by Kodename47
The stock tune will also have a certain amount of headroom for the LTFT to lean up the mixture a little I reckon. The open loop fuel map isn't necessarily the target AFR, it's just the means towards a desired AFR.
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most stock cars run AFR down into the 10,s like @
Tim Radley stock car on a tailpipe afr sensor, you just dont see it if you use the stock o2 sensor for readings using ecutek,tactrix,oft ect as its only calibrated to about 11.8 at richest (from memory) in stock tune.
yep the LTFT will adjust AFR a bit , but they all seem to run pretty darn rich high rpm stock, pretty sure that how most intakes are "making power" on stock cars just leans the top end a bit.
lot of tuners expand the range its seems to be quite a reasonably "wideband" enough for NA guys anyway