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


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Old 10-08-2021, 10:13 AM   #1
Rabrooks
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Beehive valve springs

Has anyone used the beehive springs on their valve train. I'd like to know how well they work
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Old 10-08-2021, 10:19 AM   #2
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Beehive valve springs

I have them i donít really feel a difference its more a security thing for the people that enjoys banging redline all day but if you ďaccidentallyĒ end up redlining youíll be okay from valve float issues but keep in mind the oil system will freak out i got them because its a must have since the engine was already apart.


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Old 10-08-2021, 11:33 AM   #3
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Beehives allow you to run more lift then a standard spring without getting coil bind. That is it.
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Old 10-09-2021, 04:34 AM   #4
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Doing 8k rpm is easier than before.
Hesitation from 7.5k has gone.
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Old 10-09-2021, 10:23 AM   #5
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makinen: IIRC main issue that kept off higher redline from twins engines was limitations of oiling system.
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Old 10-09-2021, 04:30 PM   #6
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makinen: IIRC main issue that kept off higher redline from twins engines was limitations of oiling system.
Yep.
Just because you can doesn't mean you should.
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Old 10-11-2021, 06:20 PM   #7
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This is for my track car. Redline will be 8500. This is a built engine with alot of oiling updates.

There is alot more to beehives than just higher lift. They have much better harmonic control allowing a softer spring to do the same job as heavier springs. Just wondered how well they worked in the fa20
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Old 10-11-2021, 06:24 PM   #8
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For those using the beehive springs. Does anyone have the PAC springs. If so. Do you have a part number
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Old 10-12-2021, 10:37 AM   #9
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This is for my track car. Redline will be 8500. This is a built engine with alot of oiling updates.
Good luck with engine to last any meaningful mileage. AFAIK competent shops had problems getting FA20 reliably past 7800-7900, due mentioned oiling system limitations.
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