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Thread: Strange AirFuel plot on stock SR20DE

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2014-09-30 08:21:37
Strange AirFuel plot on stock SR20DE
Last weekend we strapped my car to the dyno. I needed a baserun to know what is available and we tested a few things to find 'hidden' potential.

Actually I am very surprised about that dyno plot! Can anyone tell me what is wrong with my engine - or is that a 'normal' stock ECU behaviour?

Btw. 3 or 4 runs were made with the exact same result!


2014-09-30 08:32:46
I would say that is normal, look at how Nissans CG10 engine performs with stock ECU

One more reason to upgrade to a tuneable ECU
2014-09-30 10:15:23
That huge drop between 2800 and 3500 is a heavy load area and looks to be tip in (normal plot)
That spike after 3800 is for emissions control me thinks.

Plot looks normal to me
Last edited by Boostlee on 2014-09-30 at 10-16-34.
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