WorkingFromHome
Cadet
- Joined
- Jun 27, 2019
- Messages
- 25
I know August is only this weekend, but I'm starting to plan out my winter projects. I've been going back and forth about upgrading my (270hp) 5.0GXi-E engines with the (320hp) 5.7GXi-? for the extra hp and torque. I'm no stranger to building engines, I've done 4 different V8 Mustangs and Trans AMs each starting with bare blocks,machining, picking parts, assembling, installing, troubleshooting, etc. Obviously, marine spec has its differences but I'm not a beginner and I have most of the tools...
I have prices from Michigan Motorz for new long blocks and am working with a local machine shop on prices to bore and stroke my existing short blocks and cross checking the hard parts, it looks like they are mostly all the same between the 5.0 and 5.7 GXi-E series engines with the exception being the wiring harness.
What I need help with is the ECM. I know the 5.7s would run lean using the 5.0 ECMs, but which, if any 5.7 ECMs will work with my existing 5.0 wiring harness and sensors, etc from the GXi-E? I see that they have different harnesses, do I need to upgrade to newer wiring with the ECM?
Thanks in advance!
I have prices from Michigan Motorz for new long blocks and am working with a local machine shop on prices to bore and stroke my existing short blocks and cross checking the hard parts, it looks like they are mostly all the same between the 5.0 and 5.7 GXi-E series engines with the exception being the wiring harness.
What I need help with is the ECM. I know the 5.7s would run lean using the 5.0 ECMs, but which, if any 5.7 ECMs will work with my existing 5.0 wiring harness and sensors, etc from the GXi-E? I see that they have different harnesses, do I need to upgrade to newer wiring with the ECM?
Thanks in advance!