Quote:
Originally Posted by Ebush
Both engine need an alternator so not sure why that’s brought up. Stock 86 doesn’t need a big heavy adapter plate for the trans, and also when using the adapter plate the flywheels are usually much thicker and fairly heavy. I’d bet that the clutch assembly with the adapter plate weighs more on the k24 swap than a stock 86.
The BRZ that was swapped was using the plastic intake manifold, so if swapping a 2017+ you’ll save even more weight. Also the engine that was pulled from the car had an aftermarket header, appears to be catless as well.
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I feel like older engines had smaller alternators because they had to power less electronics like they didn’t have electric fans, electric power steering, electric coolant pumps, HIDs, etc, but the K24a2 isn’t super old. It was just a thought. I wasn’t saying it was for sure.
They are usually CNC aluminum, so they can be fairly light compared to a steel flywheel. This one for a 2JZ to CD009 is 15lbs or half the weight of the OEM flywheel, according to them:
https://www.maverick-motorsports.com...-adapter-plate
I’m sure a lightweight flywheel and hydraulic TOB, which omits the clutch fork, on the stock setup would be lighter, but they probably add to the weight reduction.
Again, the point is that an apples to apples comparison would be a FA20/24 with an aluminum flywheel, aluminum driveshaft, catless header, and whatever other nuances might be different other than the basic, assembled long-block. We know how light people have gotten this platform without a K24, so I guess we will have to see what the difference is with one.