Badzracing

iTrader: (12)

If so, what was the result and wich way did you adjust it ( + or -)?

Crash Dummy

In most cases if its not broke don't fix it the spark dwell time is how long the coils get saturated. GM is a little easy on the coils so bumping them up a little won't hurt and it may help. Motec says to run the coils at 7 ms of dwell time and up to 9 ms in drag only cases, because the coils won't last long at that setting. Gm sets them at 4-5 ms and I guess they will last forever there so setting them at 6-7 ms should'nt hurt anything, Its kind of like getting a free MSD, more spark. If you net no better times and if your truck runs the same I would leave the settings stock.

JERRY2500

Hmmm, and were do i change this? I'm looking but i don't see it.

02sierraz71_5.3

iTrader: (2)

how are you loging dwell time, tell us more.

Crash Dummy

It is done by battery voltage you need to pay atention to the 12-14 volt area

02sierraz71_5.3

iTrader: (2)

what does that equate to in millsec. ? How did you find out about this? Any reading

JERRY2500

We need some kind of write up on this

Badzracing

iTrader: (12)

I heard somewhere that upping the dwell time a little increased torque. I don't think I'm brave enough to try it without hearing from someone who has done it successfully.

Crash Dummy

I will put together some information on this and post it as soon as I can. The longer you saturate the coils the bigger the spark but having it set to high makes them get hot. stock is 4-5 ms you can raise it to 7 ms for street and 9ms for drag only BUT DO NOT run 9ms on the street or you will be buying coils soon

JERRY2500

Thanks, I'll be waiting. This should prevent spark blow out at high boost levels?