what fails first - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

EN2_Squirrel · 10-11-2012, 03:07 AM

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

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.

serialk11r · 10-11-2012, 06:56 AM

Quote:

Originally Posted by Calum

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

Rods/rod bearings probably.

im gonna have to agree with this

Rayme · 10-11-2012, 10:14 AM

Quote:

Originally Posted by JDMenrique

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

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

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

10-11-2012, 03:07 AM	#1
EN2_Squirrel Senior Member Join Date: Aug 2012 Drives: 2013 FR-S Location: San Diego Posts: 300 Thanks: 180 Thanked 58 Times in 46 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	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?

10-11-2012, 03:13 AM	#2
Tim_Asphalt_FRS Is it fast? No. Join Date: Aug 2012 Drives: 2013 Scion FR-S Manual-Asphalt Location: Vista, CA Posts: 604 Thanks: 824 Thanked 164 Times in 122 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Rods/rod bearings probably. __________________ 2013 (Rebadged) Toyota GT-86 {Perrin intake tube, aFe dry air filter, custom 2.5" exhaust, PLM overpipe, Kartboy crank pulley, Hotchkis springs, custom Flossy grip tape shorty, TRD shifter, Berk HFC, Whiteline Sway-bars} [Wanted: Delicious Stg 2 tune, Bilstein struts]

10-11-2012, 10:19 AM	#9
VSGTS14 987 Motorsports Join Date: Aug 2012 Drives: '13 WO FR-S Location: Phillipsburg, NJ Posts: 340 Thanks: 1 Thanked 97 Times in 66 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	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. __________________ '13 WO FR-S Track Car Build

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10-11-2012, 06:35 AM	#3
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,868 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	The welds on the intake manifold.

10-11-2012, 09:59 AM	#6
eikond Wish Nissan made one Join Date: Feb 2012 Drives: '13 WRB BRZ Premium Location: Lake Orion, MI Posts: 886 Thanks: 129 Thanked 360 Times in 189 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	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.

10-11-2012, 10:34 AM	#11
CBR600RR Senior Member Join Date: Jul 2012 Drives: Raven Black Location: Ottawa, Canada Posts: 1,343 Thanks: 451 Thanked 563 Times in 276 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	i think we have already determined that the clutch fails first. at about 300HP+

10-11-2012, 11:56 AM	#12
ANTI_LAG Senior Member Join Date: Jul 2012 Drives: Ones with Big Turbos Location: Houston, Texas Posts: 182 Thanks: 0 Thanked 153 Times in 68 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	rods

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