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NewHemi · 10-22-2010, 10:30 PM

ECUs will contain all engine wiring. You can wire the rest yourself (windows, lights, fuel pump, water pump, gauges) using connectors you steal from the stock harness that comes with the car. I spent a couple of weeks trying to isolate wiring and strip out only the needed wires and connectors from the harness, and I can tell, it can't be done. The wires are so intermingled with common grounds for a boatload of things, and a ton of wires for things your car doesn't have. So just lay out wiring to where you need it, cut connectors from the old harness, and go for it.

Put water pump, lights, windows, fuel pump, gauges and what ever else you want on separate switches. You will also put the ECU power on a switch, and then it will be a matter of flipping all of the swithces and hitting your start button (which you also need to install).

As for the windows, I have thoughts on those, and you can find out my suggestions on my blog newhemiracing.blogspot.com

The ECU shouldn't control the fuel pump, and water pump, although they will give you connectors for them, and can control them. The ECU controlling the fuel pump makes getting fuel for fuel check a real challenge. The ECU will fire the pump, and wait until you are spinning and starting the engine before it hits the pump again. So even if your fuel system holds pressure pretty well, by the time you get out, get the hood off, and go to check fuel, you wont have any there to check. So wire it on its own switch. Smae for water pump, as there are times when you want the water pump running and nothing else happening.

I start to do a wiring DP wiring diagram, and when I get back from this western swing, I will finish it.

The wiring is not as hard as it seems. But you need a plan, and some patience. Good luck, and message me if you need moree info.

As for which ECU... I like the FAST system. It uses stock crank sensor, and cam sensor, and the software is nice and logical for the most part. Many people like the Big Stuff 3, but it required changes to our water pump etc, as it hangs a crank timing wheel on the front of the engine. As for the AEM, I hear that support is a problem. But FAST and Big Stuff 3 provide ample support to get you running good. And they both will help you from there. However, there are Drag Paks running very well with all three of these systems.

Price is one consideration. And another key one, is do you have somebody you already know and trust who can help you refine the tune. The mfgs will do all they can, but guys like Jeff Taylor, and Joey Wilkes can give you a competitive edge with their knowledge of these ECUs and these engines. Jeff Taylor put us in the 9's on our first run after he tuned us.

David
The New hemi Guy

10-22-2010, 10:30 PM	#2
NewHemi Senior Member Join Date: Dec 2009 Location: Ohio Posts: 472 Likes: 0 Liked 1 Time in 1 Post	Re: DP wiring ECUs will contain all engine wiring. You can wire the rest yourself (windows, lights, fuel pump, water pump, gauges) using connectors you steal from the stock harness that comes with the car. I spent a couple of weeks trying to isolate wiring and strip out only the needed wires and connectors from the harness, and I can tell, it can't be done. The wires are so intermingled with common grounds for a boatload of things, and a ton of wires for things your car doesn't have. So just lay out wiring to where you need it, cut connectors from the old harness, and go for it. Put water pump, lights, windows, fuel pump, gauges and what ever else you want on separate switches. You will also put the ECU power on a switch, and then it will be a matter of flipping all of the swithces and hitting your start button (which you also need to install). As for the windows, I have thoughts on those, and you can find out my suggestions on my blog newhemiracing.blogspot.com The ECU shouldn't control the fuel pump, and water pump, although they will give you connectors for them, and can control them. The ECU controlling the fuel pump makes getting fuel for fuel check a real challenge. The ECU will fire the pump, and wait until you are spinning and starting the engine before it hits the pump again. So even if your fuel system holds pressure pretty well, by the time you get out, get the hood off, and go to check fuel, you wont have any there to check. So wire it on its own switch. Smae for water pump, as there are times when you want the water pump running and nothing else happening. I start to do a wiring DP wiring diagram, and when I get back from this western swing, I will finish it. The wiring is not as hard as it seems. But you need a plan, and some patience. Good luck, and message me if you need moree info. As for which ECU... I like the FAST system. It uses stock crank sensor, and cam sensor, and the software is nice and logical for the most part. Many people like the Big Stuff 3, but it required changes to our water pump etc, as it hangs a crank timing wheel on the front of the engine. As for the AEM, I hear that support is a problem. But FAST and Big Stuff 3 provide ample support to get you running good. And they both will help you from there. However, there are Drag Paks running very well with all three of these systems. Price is one consideration. And another key one, is do you have somebody you already know and trust who can help you refine the tune. The mfgs will do all they can, but guys like Jeff Taylor, and Joey Wilkes can give you a competitive edge with their knowledge of these ECUs and these engines. Jeff Taylor put us in the 9's on our first run after he tuned us. David The New hemi Guy Last edited by NewHemi; 10-22-2010 at 10:40 PM.