So my car currently has an MS4 cam in it. Poor drivability, gas mileage, and you have to rev for the powerband. I've talked to EPS about a much less radical cam that meets what I'm after which includes MUCH better gas mileage.

I've heard that for major changes such as a cam swap that a dyno tune is essentially required. Does this hold true even when going to a less radical cam? Getting off work and driving 2-3 hours for a shop with a dyno may prove to be a challenge but if this is a must following a cam swap, I will do it. However, has anyone had success just getting a PCM tune after doing a more conservative cam swap?

 

Do you have the option to get a good street tune?

 

A mail order could get you close but with a cam even a small one if you got a mail order tune you would still need to get your WOT a/f checked.