VE Tuning at WOT?
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Hey guys. Vehicle is a 2006 Trailblazer SS (E40 pcm). Bolt ons, LT's and a 220/224 cam tuned with HPTuners. I have done a ton of reading including CPIG's and other VE tuning guides. From all the reading I have done it was noted to tune the VE table up to 4000rpms if the MAF is going to be utilized. Therefore, the VE table has been tuned accurately via LTFT and STFTs up to 4000rpms. MAF and spark have also been dialed in. My understanding is that under WOT the VE table is not referenced but rather it is a combinaation of the PE table and MAF which I have both dialed in. My question is, would there be any benefit for dialing in the VE table in the cells that are referenced under WOT? or the cells above 4000rpms? Thanks
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You probably won't hit those cells while cruising but doesn't the VE at those ranges still plays a big part in fueling, especially in SD or at WOT where the O2 readings/fuel trims are not taken into account?
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Well in SD mode the VE table would play the only role in the PCM determining base fuel calculations, so yea I'd say it's pretty important lol! Even when using a MAF the VE table is referenced for the PCM to determine how efficiently the engine is processing the air crossing the MAF, so if you want to 'complete' the job you'll want to dial in the VE map for all areas you'll be experiencing.