ECM for 454?
10-24-2006, 06:15 AM
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Car: 1986 Iroc-Z
Engine: Stock 305 TPI MAF w 148,000 mi.
Transmission: 700R4
ECM for 454?
Hello:
I have a carbed 454 running in my 4x4 Blazer. I just bought a ASM manifold off ebay, which is similar to the 502 ramjet
It doesn't include harness or ECM. It has fuel rails with 8 injectors, and a throttle body with the usual sensors. I need your recomendation on which ECM to use. I'd rather use a cheap GM ECM instead of having to buy a more expensive FAST or Accel setup. I found this marine setup: Module/Harness, Kit MEFI 4 Ram Jet 502 12499117 - Crate Engine Depot
But I'm not sure if it's used only for updating an older MEFI or if that's all I need for my engine.
FYI I'm in the middle of swapping a 730 ECM into my 86 Iroc (with all the help you have provided me), so I'm pretty familiar with the harness and how everything works. So if you guys tell me I can use a 730 ECM with larger injectors, it would be great.
All inputs welcome.
I have a carbed 454 running in my 4x4 Blazer. I just bought a ASM manifold off ebay, which is similar to the 502 ramjet
It doesn't include harness or ECM. It has fuel rails with 8 injectors, and a throttle body with the usual sensors. I need your recomendation on which ECM to use. I'd rather use a cheap GM ECM instead of having to buy a more expensive FAST or Accel setup. I found this marine setup: Module/Harness, Kit MEFI 4 Ram Jet 502 12499117 - Crate Engine Depot
But I'm not sure if it's used only for updating an older MEFI or if that's all I need for my engine.
FYI I'm in the middle of swapping a 730 ECM into my 86 Iroc (with all the help you have provided me), so I'm pretty familiar with the harness and how everything works. So if you guys tell me I can use a 730 ECM with larger injectors, it would be great.
All inputs welcome.
10-24-2006, 07:39 AM
#2
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Car: check
Engine: check
Transmission: check
As you are already familar with the '730, I would also use it here. For the large engine displacement there is a code patch that you should make. It has to do with correcting an injector PW limit.
There is a thread on the diy_prom board concerning this. Along with the fix, it is an easy change to make.
RBob.
There is a thread on the diy_prom board concerning this. Along with the fix, it is an easy change to make.
RBob.
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