High or Low Impedance?

[qbnkiller]

Re: High or Low Impedance?

http://www.syty.net/forums/showthread.php?p=334377#post334377

Check it out...something new for all of you who may be interested...

 

[cloneman315]

Re: High or Low Impedance?

just check out the post i put on up modding the ecm wire for the injector drivers,turbo 6 tried it and he says it works well but u need to relay the wire,and my truck with the 415 cam big heads valves and 75 injectors i swear runs idles and drives better than when it was stock no joke.

 

[QUICK STORM]

Re: High or Low Impedance?

just check out the post i put on up modding the ecm wire for the injector drivers,turbo 6 tried it and he says it works well but u need to relay the wire,and my truck with the 415 cam big heads valves and 75 injectors i swear runs idles and drives better than when it was stock no joke.

i would rather just send someone my ecm and have them mod it, i got the drivers

i have the 415,75#, and the P&P vortecs, check out my sig for the build

 

[cloneman315]

Re: High or Low Impedance?

eric did mine not sure if he is doing them still,but you are going to have to do the mod to your injector driver wire in your truck yourself

 

[qbnkiller]

Re: High or Low Impedance?

i would rather just send someone my ecm and have them mod it, i got the drivers

i have the 415,75#, and the P&P vortecs, check out my sig for the build

PM me and I will give you a price on doing it. Adding the external relay is one way to do it. Nolan, and others, have done it without the relay, and changed the ECM B fuse. They have not reported any problems, and with Nolan's experience (and plenty of it!) in running these modded ECM's, I think he has earned the respect for the work he's done from customers to tuners alike. It is important for people to realise that there is more than one way to attack the problem. Your solution is one way. This solution is another. If it would be a problem, we would have heard about it by now from the many customers he has done the ECM mod to.

 

[qbnkiller]

Re: High or Low Impedance?

....furthermore, ALL the 75#, 85#, and 95# injectors are PEAK and HOLD, so tuning should be accordingly adjusted to compensate for faster-acting injectors.

These type of injectors and drivers may also be called current sensing or current limiting. They are more expensive and complex than saturated circuit drivers, and are not generally used with domestic production ECUs. They are primarily used in aftermarket high performance systems. Most high flow injectors are low resistance (2-5 ohms) and use a peak and hold driver to activate them. The Peak current is the amount required to quickly jolt the injector open, and then the lower Hold current rating is used to keep it open for as long as the ECU commands. These require the extra kick from the higher current to keep the opening and closing time of the injector stable at the higher fuel flow rate.

 

[cloneman315]

Re: High or Low Impedance?

im just going by what turbo 6 phill and eric and myself also have seen the voltage changes with the 75s,under wot the aldl port will drop so low on voltage it will shut datatmaster down,if u think about it the tiny wire on the ecm is your main injector feed wire which when the injectors are at high dc they draw a lot of current, and the red 10 gauge with the relay seemes to fix this problem and i know turbo 6 s had the same problem, and i also seen a big difference ,maybe it is just our 3 trucks i duuno.And if u do the 10 gauge wire from the batterey to the ecm u do not need to upgrade the ecm fuse as it will only be a trigger for the relay and put less of a load on that circuit.Here is a post that was just put up,but hey im no tunner..And in no way am i second guessing the canadian tunning guys.
http://www.syty.net/forums/showthread.php?t=35874&page=2&pp=15

 

[10secTy]

Re: High or Low Impedance?

I also found with the ecm running in the true peak and hold set up it made less heat and the voltage droped less when in big injector PW.

Nolan

 

[10secTy]

Re: High or Low Impedance?

I have seen this as well and it never affected my tunes. I had to run a different power wire on my set up but it was because I was powering up my Wideband 02 off of the Ecm powerfeed and it would drop out some times when the voltage would drop. Other wise it did not cause me any problems at all. But like anything it does not hurt to make sure you have 100% voltage there :tup:

Nolan

im just going by what turbo 6 phill and eric and myself also have seen the voltage changes with the 75s,under wot the aldl port will drop so low on voltage it will shut datatmaster down,if u think about it the tiny wire on the ecm is your main injector feed wire which when the injectors are at high dc they draw a lot of current, and the red 10 gauge with the relay seemes to fix this problem and i know turbo 6 s had the same problem, and i also seen a big difference ,maybe it is just our 3 trucks i duuno.And if u do the 10 gauge wire from the batterey to the ecm u do not need to upgrade the ecm fuse as it will only be a trigger for the relay and put less of a load on that circuit.Here is a post that was just put up,but hey im no tunner..And in no way am i second guessing the canadian tunning guys.
http://www.syty.net/forums/showthread.php?t=35874&page=2&pp=15

 

[ghettosled]

Re: High or Low Impedance?

dont forget there are 75# high impedence injectors out there as well, in addition to the seimens mototron slim line 60s.. so it is possible to run a 75# high impedence injector with the factory ecu. Nolan would be the best to talk to about the tune w/ stock ecu.