Project MKIV Supra: Part 9 – The 2JZ’s running! Plus more fuel, new suspension, tires, dyno runs, and more!


An Aeromotive fuel pressure regulator and liquid-filled gauge keeps our fuel pressure in check.  It's a nice complement to our engine bay, too.  And there’s that little fuel pressure sensor that had to be replaced after my aforementioned wire-cutting and altnerator swap story.

Other aspects of the build we'd like to briefly share with you are the dual electric fans and battery relocation done by Modified by KC.  We decided twin fans would pull better than the factory clutch fan, as well as free up a little parastic drag on the engine.

The battery relocation would give us more room to work with the car in the front, as well as clean up the engine bay and balance out the car's weight dristribution a little better.


Twin Spal electric puller fans replaced the factory clutch fan, and are responsible for pulling the hot air away from the PWR radiator.  This setup is nice because, not only does it take away any power-robbing drag from the water pump pulley, it also cleans up the engine bay because now the that fan shroud is gone as well.

This is where the fan wiring goes to, and also where the stock battery location used to be.

Now that we have room in the trunk, we can install any battery we pretty much want, as long as it's not too tall and touches the removable sunroof when it's placed back there.  An Optima RedTop battery is the way to go when you want to get both high cranking amps and a little weight reduction, weighing in at just 33-lb.  This the Redtop 35, and it will be going in the trunk.  I've run Redtop 35s on a couple of BMW M3s, and we just also installed a YellowTop on our Project E46 M3 as well.

Here is the Optima battery sitting nicely in the trunk.  The sunroof-top fits fine over it, and it provides all the cranking juice we need.  MKC will just have to secure the battery (and that Sony amplifier) next. 

Moving the battery to the rear is nice because you not only get a cleaner looking hood, but taking 33-lb out of the front of the already slightly front-heavy Supra (it was 51/49 front-to-rear, stock), and putting it in the back will help weight distribution under cornering.  Ideally we would have put it on the right side of the trunk, opposite the driver, but it didn't seem to fit too well.

On the next page we start getting into the dyno graphs!

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