I thought I'd start compiling some things for my upcoming 7M swap for the Cressida. This has been a goal of mine since I bought the car about 2 years ago, but I never thought I'd actually be able to make it happen!
I've been jealous of my bro and dad for years now because they had the time and money to spend on their Supras, and I had to be practical and stick with my Sentras (88 then 94 - hey I was a college kid on a budget)! When I relocated to Australia and had the chance to start over, I knew the Cressida was the closest thing to a Supra that I'd likely be able to get (both based on budget and practicality). I didn't go for the MX-83 due to price and so that left the '73.
For a bit of background, my 5M is pretty tired (it's got at least 230,000km/143000miles on and I don't know if that's accurate). It's had a new headgasket last year as a preventative thing, numerous oil leaks that I'm only just beginning to catch up with, about the noisiest valve train on the planet, not the best fuel economy, and sufficient but definitely not impressive power.
What I hope to gain from the 7M is fairly simple. More power obviously, but hopefully more responsive power (better torque spread) as well as slightly more efficiency. The 5M fires all 6 injectors simultaneously, whereas the 7M system fires 2 at a time. That may not directly translate to more efficiency, but it certainly can't hurt! There's also the newer (and possibly smarter) electronics and a freer flowing head.
Now, here's where things get a bit fishy. I am on a seriously tight budget. That means I'm going to make the most of what I currently have and wait to do anything "special" somewhere down the track. That means I'm planning to keep my auto transmission and I've got no plans to go turbo (yet...:naughty: ). As far as I know, A 7M in front of a stock A43DE is something no one's ever done. And there may be a reason for that!
I'll be breaking this thread up into 3 "phases" to help me and anyone else looking at the thread. Phase 1 will be planning, 2 will be modifying/rebuilding, 3 will be fitting/testing.
I'm still at Phase 1 and will be for quite some time. The engine will be here by the end of the week (Thanks IJ!!!) but there's lots to do before it gets anywhere near the engine bay in the Cressida!
Phase 2 will focus on putting phase 1 into practice. That means tearing down the donor engine and rebuilding anything that needs it. I'll also spend a fair bit of time attempting to modify parts and wiring to accomodate the '73 chassis/wiring.
Phase 3 will be installing the new engine and any final tweaking to get it to work correctly.
This already too long so I'll stop here and post a bit more later...
I've been jealous of my bro and dad for years now because they had the time and money to spend on their Supras, and I had to be practical and stick with my Sentras (88 then 94 - hey I was a college kid on a budget)! When I relocated to Australia and had the chance to start over, I knew the Cressida was the closest thing to a Supra that I'd likely be able to get (both based on budget and practicality). I didn't go for the MX-83 due to price and so that left the '73.
For a bit of background, my 5M is pretty tired (it's got at least 230,000km/143000miles on and I don't know if that's accurate). It's had a new headgasket last year as a preventative thing, numerous oil leaks that I'm only just beginning to catch up with, about the noisiest valve train on the planet, not the best fuel economy, and sufficient but definitely not impressive power.
What I hope to gain from the 7M is fairly simple. More power obviously, but hopefully more responsive power (better torque spread) as well as slightly more efficiency. The 5M fires all 6 injectors simultaneously, whereas the 7M system fires 2 at a time. That may not directly translate to more efficiency, but it certainly can't hurt! There's also the newer (and possibly smarter) electronics and a freer flowing head.
Now, here's where things get a bit fishy. I am on a seriously tight budget. That means I'm going to make the most of what I currently have and wait to do anything "special" somewhere down the track. That means I'm planning to keep my auto transmission and I've got no plans to go turbo (yet...:naughty: ). As far as I know, A 7M in front of a stock A43DE is something no one's ever done. And there may be a reason for that!
I'll be breaking this thread up into 3 "phases" to help me and anyone else looking at the thread. Phase 1 will be planning, 2 will be modifying/rebuilding, 3 will be fitting/testing.
I'm still at Phase 1 and will be for quite some time. The engine will be here by the end of the week (Thanks IJ!!!) but there's lots to do before it gets anywhere near the engine bay in the Cressida!
Phase 2 will focus on putting phase 1 into practice. That means tearing down the donor engine and rebuilding anything that needs it. I'll also spend a fair bit of time attempting to modify parts and wiring to accomodate the '73 chassis/wiring.
Phase 3 will be installing the new engine and any final tweaking to get it to work correctly.
This already too long so I'll stop here and post a bit more later...
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