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Old 12-17-2016, 01:35 AM   #1
Scooby Specialist
Member#: 53916
Join Date: Jan 2004
Chapter/Region: NESIC
Location: South Portland, Maine
16 19 ND RF / 818s
Soul Red/ Gel coat red

Default FA20 d4s vs DIT blocks: how close are they?

Hi all, I've been searching for a while and can't find the answer to this question: are the shortblocks for the d4s and DIT versions of the FA20 the same, minus the transmission bolt pattern?

I am building an 818 in my garage. If you've followed any of the 818 builds, you know that they have a lot of trouble keeping the intake temps down because they can't get good airflow to the intercooler with the new mid engine configuration. I spent some time with the R&D guys at FFR while they were trying to build their race version, and I watched them struggle a lot with this.

Given the low weight of the car, I'd be happy with BRZ power levels. It would make the car lighter and more reliable. It's going to be a track day toy for me, and it'll be plenty powerful for my skill level. I'd rather be faster by getting more seat time than by bolting on more power. But mostly I just don't want to drive many hours to a track only to break down after two laps because the engine catastrophically overheated.

From what I've read, the BRZ engine won't bolt to an AWD suby transaxle, which is what the 818 uses. Fortunately, the FA20DIT engine does. So my thought is this: get a salvaged BRZ/FR-S for the engine, wiring, and instrument cluster. Then buy bare block halves for a 2.0DIT and swap the D4S heads, internals, and accessories so that it would mate to the proper transaxle.

Would that work? Are the shortblocks similar enough?
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