Quote:
Originally Posted by XC3LLR8
Without a tune to account for the ethanol I do not believe it's really adding any power but rather providing a safety blanket from knock.
In a thread on a Supra forum from Jesse DaBears I read where he stated there's a substantial performance increase between a custom JB4 E30 tune vs. a 93 tune, and of course in that scenario the tune is accounting for the E.
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Ya it basically depends on if the ECU is going to try and push ignition advance further based on knock feedback or not. Only one way to really know for sure if nobody tried it.
JB4 tuning isn’t genuinely accounting for E content since it’s not able to do any fuel injection or ignition tuning for the B58.. but knowing that you will run E he probably brings in more boost and has a boost curve he found works well. But to be clear; JB4 is not tuning anything but your boost curve. (Boost controller).