JRSC B20B 200hp 160tq

[Natural Aspirations]

N/A 164/134 7PSI 205/160 Stock Block B20B Head Milled 0.030\" Crower 403's S2 Header 2.5\" exhaust 65mm TB B16 M62 JRSC fitted to the P75 head ID725 Injectors First boosted tune on eCtune. Attached the .cal and a short datalog from an autocross. Any advise would be great, engine is currently being rebuilt and will be retuned for spring.

[TopMountGSR]

Graph looks great, Smooth those fuel maps and revise those timing maps. See how your pulling timing towards redline? Your going from ~27 degrees to 25 degrees, thats backwards and will cause your car to 'nose over' so to speak. You should be adding timing as the rpms progress.

[Natural Aspirations]

Thanks! For some reason I thought you were supposed to pull timing after peak Tq. I wish I remember where I read that....

[xenocron]

Thanks! For some reason I thought you were supposed to pull timing after peak Tq. I wish I remember where I read that....

VE decreases after peak torque so fuel requirements go down to acheive same AFRs As RPMs increase, there is less time for flame propagation so timing needs to advance

[Natural Aspirations]

Makes perfect sense..... Probably could have carried a little bit higher, it's apart now on to the next project. Thanks for the tips guys!