Some opinions please..

[realcanuk]

I have basically completed my first tune by upgrading to the 2 Bar OS. I am very please with the results (especially with my first tuning experience) but I have a few questions for the more experienced.

Firstly, when on the original OS I was maxing out the maf at yet with the new OS I dont even get to 12200. Is there a difference in resolution or some reason for this ?

Secondly, as can be seen in the attached picture I get a strange ocillation in the timing which stops right at 4000 rpm. That makes me think its related to the VE but I dont really know. It seems to correspond with an ocillation in the DynClyAir and I dont know which is the cause, timing or cyl air.
A bit later in the tuning this problem did get better but not completely and I'm not sure what changed it. I posted this log do show it when it was bad to give a better idea of the problem.

Any help or advice appreciated and I already couldnt have gotten to this point without this forum so thanks to everyone who posts all this great info here.

[realcanuk]

C'mon you pros. i need some help here.

[vette_c6]

take it to a real tuner ,, or you will break your engine

[realcanuk]

take it to a real tuner ,, or you will break your engine

Thanks but that response is really useless. "Real" tuners were not born knowing how to tune. They had to learn. I am learning so if you have any helpfull input its appreciated, and if not, have a great day.

[4evervette]

have not looked at ur log ...but did u log SPARK TGMNGMT TYPE... it will tell u why u have such oscillation ...is the a supercharge corvette

[realcanuk]

have not looked at ur log ...but did u log SPARK TGMNGMT TYPE... it will tell u why u have such oscillation ...is the a supercharge corvette

I have not logged that but will look into it. Yes it is supercharged.

[realcanuk]

have not looked at ur log ...but did u log SPARK TGMNGMT TYPE... it will tell u why u have such oscillation ...is the a supercharge corvette

I logged that and it says "none". Is that what its supposed to say or did I do something wrong in the setup.

If none is right, any ideas what might cause that erratic spark. It doesnt happen if I run maf only so it must be related to VE or zone boundaries, but I dont know whats wrong.