Quote:
Originally Posted by pete c
Also it will mean you are running with the throttle open further for a given power output which could cause issues with the FI system.
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Exactly. Ideally you would want to run a larger throttlebody so that the same amount of air gets in while the TPS is showing a lighter throttle reading...
Keep in mind though, that this will likely change the VE at varying rpms and throttle positions... could benifit, could hinder your efforts.
If you want to give it a run for your money without the added spendings, you could get a$5 piece of lexan and run a restrictor plate (the same diameter as the 2.5L) in front of your 4.0L Throttle body.
Though the results will be different whether your system runs off a MAF or MAP system, too.