JCW F56 JCW w/ Racechip GTS
one of the reasons I sold my Racechip. If you turn down the Racechip setting the surge will be less noticeable.
I will say comparing my logs of NM, Dinan sport, and Racechip Ultimate the Racechip had by far the safest AFR of the three. The downside on the MCS with a tuning box only altering boost and not adding fuel is the ecu will continue to target ~14.5:1 AFR which depending on the other mods and ambient temp you are right on the edge of detonation. This is not as big of an issue if installed on a JCW because they run a richer AFR.
I will say comparing my logs of NM, Dinan sport, and Racechip Ultimate the Racechip had by far the safest AFR of the three. The downside on the MCS with a tuning box only altering boost and not adding fuel is the ecu will continue to target ~14.5:1 AFR which depending on the other mods and ambient temp you are right on the edge of detonation. This is not as big of an issue if installed on a JCW because they run a richer AFR.
Any of them I've seen run pretty rich.
I went back to my logs and I was slightly off. sub 5k rpm the MCS will target 14.7:1 AFR. Above 5k depending on IAT etc it will typically run 13.8 to 14.3 on my logs.
Another example of a lean running DI turbo is the EA888 gen 3 in the mk7 gti's. They typically run high 14 to low 15:1 AFR under full load until about 6k rpm and it will taper to high 13's.
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Drivetrain JCW + Racechip + 2K miles = P12a4 :(
Johnnycash
Drivetrain (Cooper S)
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Jun 30, 2018 12:04 PM