Best place to buy a J&S Safeguard?
03-19-2006, 06:29 AM
#4
Im looking to buy a J&S Safeguard but im not too familiar with which one to get. mjk here is selling one new for a 350z. Can anyone explain the differences between all the safeguards? Which one should I use? Any help would be great, thanks.
03-20-2006, 10:56 AM
#7
Per John@J&S and his instructions on the website, the differences are:
1)350Z has 4-levels of ignition retard from 5250rpm up(2, 4, 6, 8 degrees)
2)Maxima has 4-levels of ignition retard for N20(0, 2, 4, 6 degrees)
These are just OPTIONs people requested him add, otherwise they work/operate the same. However, the 350Z unit should come with the interface adapter, which if anyone doesn't want, I'll buy it.
1)350Z has 4-levels of ignition retard from 5250rpm up(2, 4, 6, 8 degrees)
2)Maxima has 4-levels of ignition retard for N20(0, 2, 4, 6 degrees)
These are just OPTIONs people requested him add, otherwise they work/operate the same. However, the 350Z unit should come with the interface adapter, which if anyone doesn't want, I'll buy it.
03-20-2006, 11:39 AM
#8
Thanks for clearing that up.
I emailed John and he said with the Emanage I should get "no coil simulators". "The coil simulators are resistors inside the unit that simulate the normal load of the coils. Without them, the ECU sets a coil fault code.
You will need to add the resistors externally, at the emanage input."
Im somewhat confused about this. I need a Safeguard that does not have the coil simulators so i can use an Emanage and then at the Emanage I need resistors? I dont think I am going to be using the Emanage Ultimate to advance/retard timing or extend rev-limit so will I be able to use the Safeguard as is? I dont think I understand whats going on with this so If someone can explain that would help me out. Thanks.
I emailed John and he said with the Emanage I should get "no coil simulators". "The coil simulators are resistors inside the unit that simulate the normal load of the coils. Without them, the ECU sets a coil fault code.
You will need to add the resistors externally, at the emanage input."
Im somewhat confused about this. I need a Safeguard that does not have the coil simulators so i can use an Emanage and then at the Emanage I need resistors? I dont think I am going to be using the Emanage Ultimate to advance/retard timing or extend rev-limit so will I be able to use the Safeguard as is? I dont think I understand whats going on with this so If someone can explain that would help me out. Thanks.
03-20-2006, 11:53 AM
#9
I had to add resistors to simulate the load of the coils on the ignition wires from the ECU to the EU inorder to keep from getting a CEL.
Now, the J&S has a load built into its inputs to keep the ECU from throwing the CEL when used by itself. So, depending on where you put the SafeGuard, ie before or after the eManage, you may or may not need to add resistors to keep from getting the CEL.
I believe John has said it is best to put the SafeGuard after the Emanage, so inorder to keep from getting the CEL when the eManage isn't controlling the ignition, you would need to add the resistors to the ignition wires from the ECU to the eManage and you wouldn't want the SafeGuard to have load resistors or you wouldn't need to add large value resistors.
Now, the J&S has a load built into its inputs to keep the ECU from throwing the CEL when used by itself. So, depending on where you put the SafeGuard, ie before or after the eManage, you may or may not need to add resistors to keep from getting the CEL.
I believe John has said it is best to put the SafeGuard after the Emanage, so inorder to keep from getting the CEL when the eManage isn't controlling the ignition, you would need to add the resistors to the ignition wires from the ECU to the eManage and you wouldn't want the SafeGuard to have load resistors or you wouldn't need to add large value resistors.
03-20-2006, 12:21 PM
#10
Per his posts on my350Z.com, he changed the SafeGuard units in 8/04 to work with the Emanage BLUE units:
Originally Posted by John at J&S
If you already have a J&S unit and you want to use it with the emanage ignition harness, you will need to order a modified waste spark adapter module, which will have an added buffer amplifier.
On future 350Z units, I'll change the value of the input load resistors so the emanage can drive the J&S directly, without the need of an added buffer amplifier.
On future 350Z units, I'll change the value of the input load resistors so the emanage can drive the J&S directly, without the need of an added buffer amplifier.
Originally Posted by John at J&S
Mr. BadMonkey:
I would try installing the emanage between the ECU and the J&S.
You shouldn't need diodes on the emanage, but leave them on the J&S if it's an earlier unit (pre 8/04).
Unless the emanage has been preset for 350z, you might have to open it up and move the internal switches and jumpers.
ACP tried to make the two units work together, without success. Let me know if you have trouble, and I might make the trip to Burbank after all.
I would try installing the emanage between the ECU and the J&S.
You shouldn't need diodes on the emanage, but leave them on the J&S if it's an earlier unit (pre 8/04).
Unless the emanage has been preset for 350z, you might have to open it up and move the internal switches and jumpers.
ACP tried to make the two units work together, without success. Let me know if you have trouble, and I might make the trip to Burbank after all.
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