Dyno Tuning Wellington: The Nugget

It’s been years since starting this project and now it’s time for the moment of truth; The dyno tune.  Working at STM (Speedtech Motorsport Ltd) really does have it’s perks, I managed to twist Chris Wall’s arm into tuning my car after hours.

Once on the dyno it quickly became apparent that I had a couple of problems.  The first being boost creep and the second being the fuel pump was not flowing enough for the level of boost we were seeing.  Both of these problems aren’t uncommon, most early Mitsubishi EVOs with a big turbo back exhaust suffer from boost creep.  I have already ported the wastegate port on the turbo housing to try and remedy the situation. Turns out that wasn’t enough.  The ideal fix for this problem is to fit a 38mm external wastegate, at this stage I’m going to try and steer away from this solution.  The only reason the creeping boost is a problem is because I’m running out of fuel at high RPM.  My preferred solution due to budget constraints is to fit a high flow Walbro fuel pump and see how we get on.

Currently on 95 octane gas the little EVO is making 188kW ATW, not a bad result.  I’ll let you know how it goes once the fuel pump has been replaced and we are running 98 octane gas.

Horrible photo. I know. Sorry

The Nugget: Bumper is on!

So progress has slowed on the nugget a bit. I refuse to let it beat me though.  I need to have it sorted and sold by November.

With the help of Bam, I’ve installed the rear bumper.  It was heaps harder than I thought, nothing is ever easy.  It’s starting to look like a complete car.

Here is my updated to-do list.

  • Install rear 1/4 windows
  • Install roof strips
  • Install rear seats
  • Install rear seat belts
  • Fabricate exhaust
  • Power steering belt
  • Replace the fuel level sender
  • Replace the fuel pump
  • Fit new solenoid to passengers door
  • Hook up A/C wire
  • Find and fit awesome steering wheel
  • Fit rear bumper
  • Find, fit and paint EVO 3 Side Skirts
  • Stereo, if we get that far
  • Dyno Tune
  • Wheels
  • Suspension
  • Cert
  • Oil pressure warning light
  • Crazy indicator problem

Starting the Nugget & subsequent fuel pump replacement

On Wednesday night Bam and Chris stayed late at the workshop to give me a hand with the Nugget.  The aim of the evening was to get the car running, it’s been started before, about 12months ago.

**Turn the key** the starter tried to start the engine with no luck.  Let the problem solving being.

Bam diagnosed the problem as fuel pump related.  After a bit more investigation Bam found the pump was getting power meaning one thing. The pump was poked. After pulling the pump out of the tank it became apparent why, glorious gold rust.  I think I know the reason why the tank got so rusty, before I bought the car it was left in a shed for who knows how long with hardly any fuel, this has caused the fuel pump, cage, and tank to get very rusty.

Ginger on your head or in your fuel tank. It's never OK!

EVO 9 Fuel Pump, can you even call that an upgrade?

I think I know why my fuel level sender isn't working

Bam installs the fuel pump cage.

After that it started first time, to easy! Here is a video.

While Bam was doing some technical work, I installed my rear seats and seat belt.

Things I learnt

  • Long term storage of your car isn’t good for it.  Take the correct precations
  • A Walbro 500hp fuel pump will plug straight into the factory Mitsubishi fuel pump wiring

Here is my updated to-do list.

  • Install rear 1/4 windows
  • Install roof strips
  • Install rear seats
  • Install rear seat belts
  • Fabricate exhaust
  • Power steering belt
  • Replace the fuel level sender
  • Replace the fuel pump
  • Fit new solenoid to passengers door
  • Hook up A/C wire
  • Find and fit awesome steering wheel
  • Find, fit and paint EVO 3 Side Skirts
  • Stereo, if we get that far
  • Tune
  • Wheels
  • Suspension
  • Cert
  • Oil pressure warning light
  • Crazy indicator problem