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Lamda for cruising on e85

Understanding AFR

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hi i got a r32 gtr with wolf v500

i am getting into tuning my own car

its allready tuned but i am making my own fresh map as im not happy they way its tuned

what lamda would be safe for cruise

and what lamda for full throttle running 21 psi single turbo standard motor

In almost all situations the cruise lambda target should be 1.00 as this will give good economy and minimal emissions. At low rpm you may find that some engines (particularly with aggressive cams) may respond better slightly richer (0.95-1.00). Under WOT operation I'd suggest starting around 0.78-0.80 and then test to see how your specific engine responds.