Category Archives: 1988 Suzuki Samurai – 4G63 swapped

Oil pan mods

So the initial problem is with steering interference.

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So to remedy this, I’ll chop it up and turn that drain out the other side.

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This is cut and flipped. I tried massaging the metal to shape, but it’s a ways off.

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So I threw some pie cuts in it.

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Then leak tested it with hot oil.

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Tada! Now paint.

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That too.

The new intake manifold

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I started with some 1.75″ mandrel bends. They are the same diameter as my throttle bodies, and smaller than my intake ports, so I figured it was a decent balance.

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I’m using my mock up head as a welding fixture.

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And they wind up like this.

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I still need to put the coil mount on it and paint it.
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Fresh black engine enamel.
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Heat shields /splash guards for my air filters.
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My brake booster vacuum plumbing.
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The GSXR 1000 air box is a little too tall.

Alternator choices

I have to pull my timing cover to get to my water pump, because I can’t run my alternator on the driver side as I planned. Unless I make the samurai right hand drive. I will not.

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Making an adapter for the samurai stock alternator might work, but the samurai has a lot more electronics in it than it did stock, so the higher output Mitsubishi, or gm1 wire is a better choice.

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Intake manifold comparison

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This is the Evolution manifold. It clears well, but needs to be clearanced and filled to clear the injectors and fully seal against the head.

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Like that. Also the egr is on the wrong end and you have to tap and plug the egr hole in the head.

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Here is the 2g dsm intake. The throttle body will interfere with the brake master cylinder. I could make a simple 45° bend/spacer for it.

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Here are the itbs from a gsxr 1000 I believe. These look promising. I can repurpose the injector holes as vacuum ports since my injectors are in the head. I just need to find air filters.

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The boots need trimmed on the outers so they will line up though.

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Here is the sheet metal intake I built when this motor was going to be a 30+psi drag monster. It doesn’t fit the bill here, but I wanted to see how it fits.

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Here you can see the sheet metal intake that was on it. It has ~11″ runners. I didn’t like the lack of response it had. That was tested with the turbine housing, and 2.5″ short exhaust vs, 2.5″ straight off the header with an inserted muffler.

Here is a measurement of the area I have to work in.
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