waxhead
wannabe backflipper
- Location
- gold coast
WowUpdate:
TL;DR; I was wrong - the Zeel performs just as well or better then the MSD and I’m VERY happy about that!
Details:
I went out last night with a new curve with a bit more total timing (34) and less retard At high RPMs (21 total at 7k). Most importantly, I had total timing come in at 1500 RPM instead of 3000. The ski rips and no more loading up down low. I did have to play with fueling a bit and ended up at 145/110 reverse jetted where previously the MSD setup liked 145/115 (when it was colder) or 135/125 when it got warmer. I think the fueling difference comes from a bit more total timing (why it wants more down low). Now, I don’t understand why it wanted less up top - perhaps because I’m running a bit more timing it’s running more efficiently and needs less fuel? Can’t really figure that one out.
Unfortunately this wasn’t an exact apples to apples test since I’m now running a slightly different curve than I did on MSD, but it tells me I can get the same (actually better) performance with the zeel so I am thrilled. No more magnets flying out, coils breaking, pickups failing, brains dying, etc.
One little side note - I was able to turn my stinger FCV way in because my water box was not getting as hot. I suspect this is because of 10 degrees more timing up top keeping the exhaust cooler. This is great news since the motor really hits hard down low with the stinger dried out a lot. I’ll keep messing with this.
BTW - it was 64 and cloudy with 25mph winds last night, so not ideal conditions but I just had to have an answer to this conundrum. I’m glad I went out!
brilliant result and write up. As we discussed on the phone, yes you are not heating up the pipe as much with your super retard up top like you had. My thinking is that due to not having the retarded ignition up top you are also not wasting the fuel out the exhaust port and thus you don't need it as much. Thank you so much for writing this. In case people are wondering why the jetting change in the warmer weather its basically Rad ( relative air density) when its warmer there is less oxygen in the air and this effects the amount of fuel you have to put in.