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Old 02-05-2011   #1
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
Default Re: Building an LT5 engine harness from scratch. Any advice?

Can you tell us more about how Autotronics interfaces with the DIS module?
And if youbdon't need the secondary injector module, is the Autotronics driving each injector separately?
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Old 02-06-2011   #2
shanker
 
Join Date: Feb 2008
Location: Albany NY
Posts: 15
Default Re: Building an LT5 engine harness from scratch. Any advice?

This project has been moving forward, but mostly in the chassis & body department. I haven't touched the engine wiring yet except for purchasing all the necessary connector pigtails & getting wiring diagrams. I was originally looking for pinouts on each of the LT5's sensors, but I have that info now. Part of the reason I chose the Autronic Engine management is because I've seen it control the LT5 engine and it can use almost all of the stock sensor inputs. Crank & cam position sensors are usable with my autronic unit as far as I know.
I'm using an AEM brand CDI 4 channel ignition to fire my factory coil packs. I haven't heard anything bad about the "wasted spark" setup. I planned to use an external regulator & set fuel pressure at a constant.

todesengel: Using only 8 injectors sounds like a great idea! I'll PM you about which ones you're using, and what you use in place of the secondaries to fill the holes. I don't really need meth injection but I do need something in place of those injectors. Maybe just leave them in place without wiring them? I was told by a GM ZR1 engineer that I could run the FP at 55psi and I'd be happy with the results. the stock injectors are 22.8lbs/hr @45psi

I was planning to run all 16 injectors, and have the secondaries kick in at anything above 1% throttle. I was told this would give a good idle and performance. Basically I would wire primary & secondary injectors together, but use a relay for the power output to the secondaries. Both injectors for each cylinder would fire in unison above 1% throttle.

I am no expert and I have no real experience with the LT5 engine so if anyone has advice for me I will certainly appreciate it.
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