Have anyone thought of a gear based timing map. From the test that I have been doing to tune the cams I have seen that I can tune for a map that is knock free in 1, 2, 3 but knocks on 4, 5. If I back up timing to remove the knock on 4, 5 then I loose power. So it would be nice to have two maps. An aggressive map for 1, 2,3 and a more conservative for 4, 5. Things happens so fast in 1, 2, 3 (especially 1, 2) that there is not enough time to load and heat the engine like in 4 & 5.

Could this be an octane issue? I am usually knock free on my 1st pull and usually low knock (ussually 3 count or less) on the 2nd and 3rd back to back pull. If I keep pulling timing to remove knock on back 2 back consecutive pulls I end up loosing some power.

I imaging a road race tune has to be very conservative (lot less timing on the map) due to the heat produced by the continuous load on the engine vs a drag pass that takes less than 15 seconds.

 

Most fast cars can't use full power in first or second. When the engine is loaded down well sometimes in third and usually 4th you can use the power. Tune for third and/or fourth. Also make sure your load and thus the timing lookup is where you expect it on the road in the gears you are having trouble. In general the motor will usually take less timing than you think it will on the dyno in the higher loaded gears. Cooler fresher air when moving etc....

 

yeah I was thinking about doing this.

just redo one of the compensation maps, so it uses my gear lookup and then does a simple + or - X depending on gear...