As discussed in several other threads a few of us have 2JZGE NA-T projects going on right now. I got mine running last weekend so it must be time to start my own thread. My goal is to keep costs down and modifications to a minimum, this includes keeping the 7M wiring with as few modifications as possible. If everything works out as I hope, you would be able to do this swap for less than the cost of rebuilding your rodknocked or even BHG'd 7M. The car this is going in is not my main supra, just a little side project for fun and to try something different. It's not being built for a huge turbo or massive power, I'll probably even keep the W58, it'll be awhile before I even put a turbo on it, but who knows where a project like this will take you, that's half the fun. For now I'll share a few pics and a rundown of what I did to get the engine running with the 7M wiring, I'll keep updates coming build thread style.
From memory, here are all the connectors on the 7M harness and what I did with them
O2 sensor - not hooked up yet - I was using a thread in style sensor in a custom downpipe with the 7M, I just need to find the stock flange style sensor and it should bolt right into the header, the sensors fror the 2jzge a single wrie with a different connector than the 7M
Oil Pressure - not hooked up yet - I separated this wire out of the loom that crosses the engine and plan to replace the stock oil pressure sensor (near where the A/C was) with the 7M one, but it won't screw into the block because it's too big around. I plan to use some pipe fittings or get the adapter from driftmotion to solve this.
Coolant Temp(s) - replace 2JZGE sensors with 7M ones - Again these wires were pulled out of the loom running across the engine as the coolant sensor ports on the 2JZGE are just under the intake runners, the 7M sensors thread right in, the singe wire one for the gauge and the two wire one for the ECU, there is one wire from the two wire sensor that needed to be extended because it was spliced into another wire right near the CPS.
Cold Start Coolant Temp - N/A - there is no cold start injector on the 2JZGE, obviously cold starts are handled some other way by the 2JZGE ECU and since I still have the 7M ECU I really should have a CSI, but I'll live without it, it wasn't hooked up when I had the 7M anyway.
CPS - modify 7M cps to fit in 2JZGE head - another slot needs to be made in the 7M CPS to fit the 2JZGE head, wiring is unchanged.
Alternator - use 2JZGE alternator - with the alternator relocated to the intake side of the engine the stock wiring will hook up, except that the hole in the battery cable needs to be enlarged as the stud on the 2JZGE alternater is larger than the 7M one. EDIT: It appears that the connector on later year 2JZGE alternators is different than the 7M connector
Injectors - use 7M injectors - any injector that fits the 7M will fit the 2JZGE, my injector wires had already been extended since I had switched the connector a couple times for the 7M, so I can't say for sure that they will reach at stock length.
ISC - extend wires, use 2JZGE ISC - There's no way the stock wires will reach the ISC as it is way over on teh exhaust side of the head, I just extended the wires, the plugs are the same on both cars, I didn't check the wiring, but I assue it's the same.
TPS - creatively mount 7M sensor, extend wires - The TPS sensors both rotate the same way, but the little tabs inside are 90 degrees different, for now I have mounted the 7M sensor 90* off normal, which leaves the connector/wires pointing straight up, possibly into the hood, I may need to try to modify the little plate on the throttle body to mount it 90* off instead. Another option would be to use the 2JZGE sensor, as I would expect the signals to be the same, however the connector is different and the one that came on my 2JZGE harness is broken
Knock sensors - use 7M sensors - 7M sensors screw right on where the 2JZGE sensors were, I'm sure the sensors were tuned for the 7M block, but oh well, the connectors on the 2JZGE sensors are different
Cold Start Injector - not used - there is no cold start injector on a 2JZGE as covered above, it would be more work than it's worth to try to add it to the 2JZGE intake and alot of people run without it anyway.
VSV's - not hooked up - I had removed these from my 7M harness, you could easy hook them up as long as you understnd what they do.
Starter - use 2JZGE starter - same connectors as 7M, just hook them up. EDIT: It appears that the connector on later year 2JZGE starters is different than the 7M connector
Transmission wires - not hooked up yet - if you are keeping the same transmission in the car, then obviously they are a no brainer, I just havent given much thought to them yet, I will be using a MKIII W58 with the bellhousing from the 2JZGE, since the 2JZGE W58 had a different mount and no speedo cable.
Coilpacks - still need solution - where I have them right now the stock connector reached and I used two sets of 7MGTE wires to get enough long wires to reach the plugs, but this is obviously a temporary solution
AFM - use 7M AFM - I'll be using a stock AFM for now and probably a lexus later, just because I have one and it's all I need to make the power I'm looking for, the wiring should reach and if you have the piping from the 2JZGE it might fit without much work.
Did I forget any?
Also the stock throttle cable is too short, I'll be trying a camry one this weekend along with working on other issues as I find them.
From memory, here are all the connectors on the 7M harness and what I did with them
O2 sensor - not hooked up yet - I was using a thread in style sensor in a custom downpipe with the 7M, I just need to find the stock flange style sensor and it should bolt right into the header, the sensors fror the 2jzge a single wrie with a different connector than the 7M
Oil Pressure - not hooked up yet - I separated this wire out of the loom that crosses the engine and plan to replace the stock oil pressure sensor (near where the A/C was) with the 7M one, but it won't screw into the block because it's too big around. I plan to use some pipe fittings or get the adapter from driftmotion to solve this.
Coolant Temp(s) - replace 2JZGE sensors with 7M ones - Again these wires were pulled out of the loom running across the engine as the coolant sensor ports on the 2JZGE are just under the intake runners, the 7M sensors thread right in, the singe wire one for the gauge and the two wire one for the ECU, there is one wire from the two wire sensor that needed to be extended because it was spliced into another wire right near the CPS.
Cold Start Coolant Temp - N/A - there is no cold start injector on the 2JZGE, obviously cold starts are handled some other way by the 2JZGE ECU and since I still have the 7M ECU I really should have a CSI, but I'll live without it, it wasn't hooked up when I had the 7M anyway.
CPS - modify 7M cps to fit in 2JZGE head - another slot needs to be made in the 7M CPS to fit the 2JZGE head, wiring is unchanged.
Alternator - use 2JZGE alternator - with the alternator relocated to the intake side of the engine the stock wiring will hook up, except that the hole in the battery cable needs to be enlarged as the stud on the 2JZGE alternater is larger than the 7M one. EDIT: It appears that the connector on later year 2JZGE alternators is different than the 7M connector
Injectors - use 7M injectors - any injector that fits the 7M will fit the 2JZGE, my injector wires had already been extended since I had switched the connector a couple times for the 7M, so I can't say for sure that they will reach at stock length.
ISC - extend wires, use 2JZGE ISC - There's no way the stock wires will reach the ISC as it is way over on teh exhaust side of the head, I just extended the wires, the plugs are the same on both cars, I didn't check the wiring, but I assue it's the same.
TPS - creatively mount 7M sensor, extend wires - The TPS sensors both rotate the same way, but the little tabs inside are 90 degrees different, for now I have mounted the 7M sensor 90* off normal, which leaves the connector/wires pointing straight up, possibly into the hood, I may need to try to modify the little plate on the throttle body to mount it 90* off instead. Another option would be to use the 2JZGE sensor, as I would expect the signals to be the same, however the connector is different and the one that came on my 2JZGE harness is broken
Knock sensors - use 7M sensors - 7M sensors screw right on where the 2JZGE sensors were, I'm sure the sensors were tuned for the 7M block, but oh well, the connectors on the 2JZGE sensors are different
Cold Start Injector - not used - there is no cold start injector on a 2JZGE as covered above, it would be more work than it's worth to try to add it to the 2JZGE intake and alot of people run without it anyway.
VSV's - not hooked up - I had removed these from my 7M harness, you could easy hook them up as long as you understnd what they do.
Starter - use 2JZGE starter - same connectors as 7M, just hook them up. EDIT: It appears that the connector on later year 2JZGE starters is different than the 7M connector
Transmission wires - not hooked up yet - if you are keeping the same transmission in the car, then obviously they are a no brainer, I just havent given much thought to them yet, I will be using a MKIII W58 with the bellhousing from the 2JZGE, since the 2JZGE W58 had a different mount and no speedo cable.
Coilpacks - still need solution - where I have them right now the stock connector reached and I used two sets of 7MGTE wires to get enough long wires to reach the plugs, but this is obviously a temporary solution
AFM - use 7M AFM - I'll be using a stock AFM for now and probably a lexus later, just because I have one and it's all I need to make the power I'm looking for, the wiring should reach and if you have the piping from the 2JZGE it might fit without much work.
Did I forget any?
Also the stock throttle cable is too short, I'll be trying a camry one this weekend along with working on other issues as I find them.
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