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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 04-18-2024, 09:35 PM   #1
Arguru
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87mm High Comp Pistons

Toda Power Liner Kit Toyota GT-86 2012+
Toda Increased Capacity 2300 KIT Toyota GT-86 2012+

-or-

HKS 2.2L Complete Engine FA20 Step 3 Subaru | Scion | Toyota 2013-2020

If I where to use these kits to increase engine capacity. Why is it seemingly impossible to find high quality 87mm High compression ratio pistons? I want 87mm Pistons, 12.5 cr or 12.7 cr. Or is it possible to modify the HKS Pistions before ordering? I want higher compression ratio and bigger bore. Also, I need the valves to match.

-I dont care about FI(Forced Induction), as I am a NA (Naturally Aspirated) fan, and will remain that way.
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Old 04-19-2024, 06:06 AM   #2
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with the cost of those is probably cheaper a long block fa24 and goes faster..
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Old 04-19-2024, 07:58 AM   #3
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HKS 2.2L Complete Engine FA20 Step 3 Subaru | Scion | Toyota 2013-2020
Umm the prices online are 30-40k for this are you really going to spend that much on a gt86 motor
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Old 04-19-2024, 08:43 AM   #4
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with the cost of those is probably cheaper a long block fa24 and goes faster..
^^
Waayyyy cheaper. I've seen entire FA24 running assembly with trans locally for 9k.
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Old 04-20-2024, 04:39 AM   #5
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It is impossible, so I decided to improvise. Custom made 90mm 11.5:1 pistons and custom sleeves. Modified OEM head gaskets. Just under 2.2L on the stock crank.
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Old 04-20-2024, 04:44 AM   #6
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Sleeves were made by LAsleeve. They'll likely make you another set if you ask them. Some of the forged piston manufacturers will do custom stuff. Gaskets are trickier... I got greedy and had to machine a bit out of stock ones to get 90mm. If you keep it sensible the stock gaskets are good for 89.5mm
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