Chris Wilson Posted July 26, 2011 Share Posted July 26, 2011 This screenshot from Oulton's data from last week may help show how Lambda varies with boost, load and RPM. I wasn't mapping EGT but max was about 980C, measured pre the the turbos. I would consider this a safe and fairly conservative map. Quote Link to comment Share on other sites More sharing options...
mellonman Posted July 26, 2011 Share Posted July 26, 2011 okay i hope i reading that right so it seems that you can keep afrs near 14. even at 0.6 bar boost with part throttle even with sightly highier rpm then im having i take it the pressure is absolute air preassure Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 26, 2011 Share Posted July 26, 2011 The stock map runs about 13:1 AFRs on the first turbo even out of closed loop. It goes mental between 3500 and 4000rpm when it opens the floodgates and goes down into the 11s and 10s. This is one of the reasons it's dodgy doing a parallel twin conversion without any remapping to deal with it, and also on a single turbo conversion with no remap. You go uphill in a tall gear and get 1 bar of dense air at 13:1 AFRs Quote Link to comment Share on other sites More sharing options...
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