S13 sr20det, ls2 truck coilpacks, jwt tuning --> Question I need answered. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Croustibat · 10-02-2015, 11:48 AM

SR dwell time is around 1.9ms, LS coils need around 5ms .

You don't need a retune as long as you have spark, true, but the spark will just be weak. No matter what JWT says, the tune has to be modified to set the dwell time, if things are done properly ... There is no need for a dyno session, this is a 2 minutes job (that includes the time to plug and unplug the chord)

The reason for the confusion is usually people talk about making modifications to the main fuel and timing map when talking about a retune. There are so many other maps and parameters in an ECU ... and dwell time is one of them.

10-02-2015, 11:48 AM	#8
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 44 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	SR dwell time is around 1.9ms, LS coils need around 5ms . You don't need a retune as long as you have spark, true, but the spark will just be weak. No matter what JWT says, the tune has to be modified to set the dwell time, if things are done properly ... There is no need for a dyno session, this is a 2 minutes job (that includes the time to plug and unplug the chord) The reason for the confusion is usually people talk about making modifications to the main fuel and timing map when talking about a retune. There are so many other maps and parameters in an ECU ... and dwell time is one of them. Last edited by Croustibat; 10-03-2015 at 01:35 AM..