matthud

I have a set of coils that I am using on a ecotec project with a standalone ECU. I have the coils wired correctly as they all will spark correctly. My ecu has a test function that will test all the coils by just randomly firing them when the engine is not running. When I test the coils they seem to get very very hot. Do the coil on plugs in the stock setup get warm? Does anyone have details on the setup for the coils, such as coil on time and coil dead time?

Chevycobaltss3

iTrader: (2)

It'll get warm if it geta hot to the touch u are sensing to much voltge to the primary

Quote:

Originally Posted by matthud

I have a set of coils that I am using on a ecotec project with a standalone ECU. I have the coils wired correctly as they all will spark correctly. My ecu has a test function that will test all the coils by just randomly firing them when the engine is not running. When I test the coils they seem to get very very hot. Do the coil on plugs in the stock setup get warm? Does anyone have details on the setup for the coils, such as coil on time and coil dead time?

matthud

Which means the coil on time is too high?

Chevycobaltss3

iTrader: (2)

Which means you r sending to much voltage..... if its just warm where u can stik ure hand on it then u r good. If its like to hot where u can't leave ure hand on it. U r commanding to much. If u can adjst it then do so. If not find a hotter type of coil.. I myself think its prob fine because the can heat up....

matthud

You don't control the voltage to the coils. The are powered by a 12v constant, and then fired with a 12v digital signal. So you can't send too much voltage. So the only thing that is commanded is the length of time the coil charges.

Chevycobaltss3

iTrader: (2)

Truthfully.... I've tune cars and can adjust. Like a 85 celica 22re u say use a efi live type system and I could adjust from 1.5-15. And I know using resistors could help. I doubt you have bad coils.. change the dwell time and see.

matthud

That might be the case with an old distributor and coil setup, but not with the coil on plug setup.

Spanky's Monkey

iTrader: (6)

read the rules bud. no need for two threads. that's just clutter.

Chevycobaltss3

iTrader: (2)

Cooil on plug is same other then it being on the plug. the,plugs not the cause it the tuning. Change the dwell of the spark. (Length)

matthud

What is the stock value for the dwell time for the Coil on plug setup?

Chevycobaltss3

iTrader: (2)

Bro it changes rpm boost level its all diff if u had hp tuners id send u a map

matthud

I realize that there is a dwell time for a rpm vs map table. Is there any chance of getting a screenshot of the naturally aspirated section of that table? I am just looking for a ball park range for this value.

Chevycobaltss3

iTrader: (2)

Even if it is under boost 100 kpas and below at any rpm it changes.. screen shots. Sorry bro there is 4 different tables for the spark n hptuners. Best bet is go.. hptuners.Com and check it out unless someone else posts it up. I can. The screen shot cuz im not home and i .am using the phone. Wut tune system u usin

matthud

I am not using a stock ecu. I have a standalone S60 ECU from DTA that I am using. So HPTuners won't do me any good. It would be nice to have to look at stock tunes, but I do not know of a demo version that would allow opening of other's maps.

Chevycobaltss3

iTrader: (2)

Hmmmmm. Is ure dwell set .500 or like 1 if its longer then. Secon of cour its to long. Ide start somwhere around .200 msec

matthud

That's why I am looking for the stock range. Everything I can find for the LS1/LS2 coils is on the order of 5ms. By default my ECU was set to 3ms.

I can't find any technical information on the GM COPs to let me know what the electrical characteristics are.

Chevycobaltss3

iTrader: (2)

Wuts ure email ill email a pic to u

matthud

PM'd it to you

Chevycobaltss3

iTrader: (2)

k emailed it to u, i lookeed up some cavis ive tuned and it had no room for dwell soi gave you a pic of a map i made for a 2006 lsj 2.0

matthud

thanks. I figured there wouldn't be anything in for a cavi, they did not use the coil on plug, they had the compression sense ignition, which I believe took care of all the timing of the spark. In 07 the 2.2 got the COP with the updated ECU. Would you happen to have any tunes for a 2.4?

But what I am seeing in the table is that at 2k @ 12.5V the dwell time is 3.3ms with a factor of .97 multiplied to it at 212 degrees. That is close to the 3ms I had.

Chevycobaltss3

iTrader: (2)

no sure i dont have one for 2.4. the 2004 cavi had the coil on plug eco 2.2. thats why i was looking for that tune i made... no dwell.... i am sorry man...



thanks