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Old 12-05-2007, 08:12 PM   #101
Element Tuning
Former Vendor
Member#: 54918
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Gaithersburg, MD
673 WHP Element
Tuning Pro Comp Engine


Two and 4 typically are the cylinders that fail in all EJ engines and some of it has to do with uneven cylinder flow through the intake manifold and some of it due to cylinder cooling. I have done individual cylinder tuning on a couple of customer's cars via 4 egt probes. Typically on an OEM engine the differences don't result in significantly different EGT readings. I think I made changes on the .2 to .5% range so it's hardly worth it. You would be better off having you injectors flow tested and putting the high flow injectors in 2 and 4 and calling it a day.

With ported heads however the cylinder flow discrepancies can be huge. I had one car that needed about 1.5% more fuel in cylinder 2 with the head package he had. If your heads aren't CNC ported then request a cylinder flow chart so you can make and educated decision to invest in EGT probes for individual cylinder tuning.

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