It has been a while since updating the progress of the MR2. Unfortunately it has not been enjoying the track time I was expecting it to see after the 2018 Trackday Challenge. This car has so much bad luck it has worn me down so my time working on the car has reduced over the last 12 months but not entirely stopped.
After removing, reworking the wiring harness, packaging then finally sending the Canadian his engine I turned to working on the car for my own benefit. Somehow the crown-wheel bolts came loose which damaged a few After installing the engine and gearbox gears in the gearbox but as I was changing the internals it was not a total lose but still a PITA which adds to the long list of grief with this car.
I changed the fuel injectors to EVO ten injectors which are long nose 500cc which eliminated the shrouding caused by the shorter injectors I was running. I then changed the fuel system to a return fuel system as opposed to the returnless system which is used for OEM application. The intake system was also freed up. After this was all sorted the car made its way the dyno for a tune. At the dyno we could not settle the engine as it was not idling right plus it was banging and popping under load which I felt was a earth issue. We spend a lot of the day on the car until I said just forget it so I can take it home then return when I have traced the problem.
Turns out 'Troy the 2GRFE conversion electrician' has wired the earth for the coils onto the engine noise capacitor. This was the last piece of wiring that I had not checked correctly and as the rest of the harness has been a total joke, this added to it. Turns out this can cause engine fires which is documented in the U.S. I decided to remove the whole harness then start from scratch which included all new pins, connectors, two bulkhead connectors from the ECU/PDM to the engine. So all the work which I had paid for but never completed as stated, no refund was binned then rebuilt by myself. I used Milspec wire for all shielded wire but used clubspec for all the the rest of the harness. It has been done in my spare time which has taken a few months but it is now back in the car which just the front harness to be checked before turning the system back on. The ECU/PDM is now relocated the floor infront of the possible passenger seat which helps that little bit with weight distribution.
The car now has a fuel gauge which is a first. The intake fuel pump failed so I have taken the opportunity to fit a low pressure high volume in-tank fuel pump which matches up correctly with the surge tank. Also added a second fuel filter for the surge tank as it was experiencing some debris in the injector filters.
The electric coolant pump has been removed with the OEM thermostat installed along with two 10" thermo fans which should help with the overheating issues it was having on the dyno.
The OEM steering rack has been replaced with the S2000 unit. It took a few days of mucking about but its in and feel pretty impressive when I took it for a (abet low speed 20kmh) drive up the street. The front end still needs to be measured up to make sure its all in the right direction.
I made a aluminium engine cover and installed some quick release pins with a strut. All works ok.
Also bought some paint so I have done some touch ups which will work a treat for the 10 metre rule.
The Enkei NT04's look pretty good too.
Still a bit more to go but its in the right direction.