TOPIC:

Has anybody ever staggard their jetting on an inline four?My kz is a little leaner on the inside cylinders than on the outside,she is runnig pretty good,but now Im getting deep into my coon tune,Im running 132.5 mains,with the needles in the middle,she seems a little fat in the middle,so Im going to lower the needles one click,but Im thinking of running the mains to a 135 on 1,and 4,and a 137.5 on 2,and 3,of course the inside two run a little hotter than the outside two,and the plugs show their leaner...whadya tink?

I have heard of it, some people say its not nessecary, but the plugs dont lie! if its running a bit leaner in the middle, jet it a bit bigger than the outside and see if it helps. another reason i have heard of running bigger jets in the middle was to help cool the cylinders of a big block that has no air flow between the cylinders

If the ignition is in good shape, the plugs should tend to look the same. Note that 2/3 are firing off the same coil... this MIGHT be the reason they look a tad different as opposed to jetting.