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**Toby** · 10-16-2012, 09:28 PM

Originally Posted by Steve

The mechanical part I get, I was more thinking about the tuning aspect of it.

Real quick, the phase limiters physically and mechanically limit the amount of advance or retard is allowed. After installing them, you must also go in the tune and tell the computer it is only allow X amount of advance or retard with cam timing so that it does not try and advance more and end up burning up the solenoids. That is how these guys are getting the ""cam" tunes, they are telling the computer to advance the cam timing at certain points resulting in the loping sound. There is no ill effect to doing this. The fuel smell you are detecting, is because with large cams at low rpms, there is not a complete combustion as it relies on a type of scavenging effect to get the air in and out of the cylinders. Results are some un burnt fuel atoms getting spit out the exhaust. It is much more involved but hopefully this sheds some light on the situation..

**BLK2012GT** · 10-16-2012, 09:43 PM

Originally Posted by Toby

Real quick, the phase limiters physically and mechanically limit the amount of advance or retard is allowed. After installing them, you must also go in the tune and tell the computer it is only allow X amount of advance or retard with cam timing so that it does not try and advance more and end up burning up the solenoids. That is how these guys are getting the ""cam" tunes, they are telling the computer to advance the cam timing at certain points resulting in the loping sound. There is no ill effect to doing this. The fuel smell you are detecting, is because with large cams at low rpms, there is not a complete combustion as it relies on a type of scavenging effect to get the air in and out of the cylinders. Results are some un burnt fuel atoms getting spit out the exhaust. It is much more involved but hopefully this sheds some light on the situation..

So are you ready for my car tomorrow?