I have always used .006 thousands for every inch of bore on the top and .005 for the second ring for every inch of bore. One thing I just dont understand is all the crankcase pressure, blowing oil out the breathers. I have spoke with a few ford guys and everyone has a little but not like a few chevy guys around here. It seems like the camaro turbo cars around here always have more oil in the catch can then the mustang turbos?
Wondering if others had similar problems?

NOTE: My last 2 motors have done this with a 98-99% leak down

 

better to over-gap than under-gap imo for a FI. I dont think its as important as some people make it out to be.

Now i'm not saying you can run a .022 top ring gap on a FI, but running a .028 instead of .030 isn't going to be that huge of a deal

 

On my first motor that I built with a procharger I tried the total seal gapless rings and the gap of the first ring was .028 and the second .024. This was different from the norm but I said the hell with it. The motor never had problems with oil coming out the breathers. However that was only a 400rwhp car.

Any more thoughts on the topic??

 

amazing how that works isn't it?

sometimes using the KISS principle works