Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Forced Induction (https://www.ft86club.com/forums/forumdisplay.php?f=78)
-   -   what fails first (https://www.ft86club.com/forums/showthread.php?t=19506)

EN2_Squirrel 10-11-2012 03:07 AM
what fails first
 
With these absolutely amazing numbers coming out of a stock engine running big boost, what do you all think will fail first?

Tim_Asphalt_FRS 10-11-2012 03:13 AM
Rods/rod bearings probably.

Calum 10-11-2012 06:35 AM
The welds on the intake manifold.

Coheed 10-11-2012 06:54 AM
Quote:
Originally Posted by Calum (Post 489946)
The welds on the intake manifold.
I wonder if Visconti and ECUTEK can get a "Danger to Manifold" light to come on over the odometer. :thumbsup:

serialk11r 10-11-2012 06:56 AM
Quote:
Originally Posted by Calum (Post 489946)
The welds on the intake manifold.
Clever clever.
(intake manifold is cast plastic)

eikond 10-11-2012 09:59 AM
the trap door in the passenger side floor board.. ?

Back on topic.. I think the valves or valve springs will be the first to go. Something in the head is my bet.

JDMenrique 10-11-2012 10:11 AM
Quote:
Originally Posted by Tim_Asphalt_FRS (Post 489778)
Rods/rod bearings probably.

im gonna have to agree with this

Rayme 10-11-2012 10:14 AM
Quote:
Originally Posted by JDMenrique (Post 490110)
im gonna have to agree with this
I'm going to agree with that too. The subaru turbo boxers are known for that.

VSGTS14 10-11-2012 10:19 AM
the piston rings. a factory subaru rod is pretty damn strong, for them to fail is very rare.
it's always the piston rings....or the heads will lift, since the motor wasn't designed for the boost.


but what do we know, subaru may have built this thing strong as hell knowing that they failed with the sti's stock block on later models and knowing the aftermarket world was going to turbo the poop out of the car.

DarkSunrise 10-11-2012 10:31 AM
Quote:
Originally Posted by VSGTS14 (Post 490119)
the piston rings. a factory subaru rod is pretty damn strong, for them to fail is very rare.
it's always the piston rings....or the heads will lift, since the motor wasn't designed for the boost.


but what do we know, subaru may have built this thing strong as hell knowing that they failed with the sti's stock block on later models and knowing the aftermarket world was going to turbo the poop out of the car.
Yeah I agree with this. The ringlands were by far the weak point on the EJ257s. Curious to see if this will repeat itself with the FA20.

CBR600RR 10-11-2012 10:34 AM
i think we have already determined that the clutch fails first. at about 300HP+

ANTI_LAG 10-11-2012 11:56 AM
rods

Spartan65 10-11-2012 12:06 PM
I saw a thread from Crawford on Facebook, pictures galore. Sorry at work can't link FB right now.
I think the Crank journals will fail first. Looking at the EJ20 versus the FA20 the FA block has less mass around those crank journals. This is where we will see some great detonations from boost.

Jeff86 10-11-2012 12:06 PM
Quote:
Originally Posted by CBR600RR (Post 490134)
i think we have already determined that the clutch fails first. at about 300HP+
Yep... gotta get a clutch to hold the power in the first place. Then you might grenade the tranny or throw rod through block :cry:


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