View Full Version : Spark Dwell Time LS7 v LS1


gojo
07-02-2007, 03:14 PM
I have an LS7 crate engine in a 2003 C5. The for the LS7 is lower than for the LS1. I'm using the LS7 table since I don't want to burn up the LS7 coil packs.
It doesn't seem to outwardly make any difference which table I use.
Any reasons why the LS7 times are lower?

2002_Z28_Six_Speed
07-02-2007, 03:28 PM
Listening in....

gojo
07-02-2007, 08:07 PM
Listening in....

Me too.
Somebody knows. :lurk:

MeentSS02
07-02-2007, 08:34 PM
Some guys have done some testing on increasing the spark dwell time with the LS1 packs, and didn't pick up any gains. The same might be true for the LS7 packs as well...some people probably don't think it is worth the risk of burning up the packs just to have some increased dwell. Seems like the guys that increase the dwell time are the ones running forced induction setups...

Definitely don't take the above as the gospel...just what I've found out from messing with it myself and doing some research on the side.

2002_Z28_Six_Speed
07-02-2007, 09:08 PM
Well, I have aftermarket multiple discharge coils so I didnt' know if this needed to be changed. I have been meaning to call MSD but I have little time right now.

gojo
07-02-2007, 09:49 PM
Some guys have done some testing on increasing the spark dwell time with the LS1 packs, and didn't pick up any gains. The same might be true for the LS7 packs as well...some people probably don't think it is worth the risk of burning up the packs just to have some increased dwell. Seems like the guys that increase the dwell time are the ones running forced induction setups...

Definitely don't take the above as the gospel...just what I've found out from messing with it myself and doing some research on the side.

I'm not looking to increase spark. If the LS7 table is correct for my setup then any increase in spark is meaningless. A complete burn is all I want. I'm just wondering if there is something else in the Z06 programming that I don't see and that affects spark. I don't think so, but it doesn't hurt to ask whether someone knows for sure that the coil packs are more efficient.
Thanks for the input
Joe

MeentSS02
07-02-2007, 09:56 PM
Oh...guess I didn't fully understand your question. A GM engineer would surely know...good luck finding one of those :jest:

2002_Z28_Six_Speed
07-02-2007, 10:15 PM
:secret2: