Ditching the Asymmetrical Connecting Rod - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

WingsofWar · 10-02-2012, 03:56 PM

Courtesy of Crawford Performance's new Turbo BRZ build

serialk11r · 10-02-2012, 04:05 PM

Whoa. That looks fat.

Tradewind · 10-02-2012, 04:17 PM

Be interesting to know the negatives of ditching the very good stock rods

Calum · 10-02-2012, 07:40 PM

Yeah... If ap is revving to 9k and making 460 wheel on the stock rods, I think I'll leave them alone for now. When it comes time I might replace the pistons for a lower compression ratio, but I'll probably just run a meth kit instead.

SkullWorks · 10-02-2012, 07:53 PM

I would assume they did this to avoid loading the eccentric part of the bearing shell?

I was just discussing the effects of having the split line at a 45degree angle to the
major load of the part.

serialk11r · 10-02-2012, 07:53 PM

Quote:

Originally Posted by Calum

Yeah... If ap is revving to 9k and making 460 wheel on the stock rods, I think I'll leave them alone for now. When it comes time I might replace the pistons for a lower compression ratio, but I'll probably just run a meth kit instead.

Well, it's hard to say how long the rods are going to last with 1.5atm boost and 9000rpm, aside from sheer force rods have to deal with fatigue as well. That said, 12.5 compression ratio and the levels of specific torque they're hitting are definitely giving the rods quite a beating which they are taking pretty well.

Entropy · 10-02-2012, 08:08 PM

Pauter rods? Looks real nice.

Xanatos · 10-02-2012, 08:38 PM

Seems like that inner bolt would be tough to get to during installation if its horizontal like that.

10-02-2012, 03:56 PM	#1
WingsofWar MODERATOR-SAMA Join Date: Oct 2009 Drives: Swagtron Scooter Location: Seattle Posts: 2,685 Thanks: 345 Thanked 1,561 Times in 524 Posts Mentioned: 81 Post(s) Tagged: 0 Thread(s)	Ditching the Asymmetrical Connecting Rod Courtesy of Crawford Performance's new Turbo BRZ build __________________

10-02-2012, 04:17 PM	#3
Tradewind Senior Member Join Date: Feb 2012 Drives: 2006 Subaru Liberty EZ30 S/charged Location: Cairns, Qld, Australia Posts: 291 Thanks: 0 Thanked 53 Times in 40 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Be interesting to know the negatives of ditching the very good stock rods __________________ Toyota 86 test driver

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10-02-2012, 07:40 PM	#4
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,867 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	Yeah... If ap is revving to 9k and making 460 wheel on the stock rods, I think I'll leave them alone for now. When it comes time I might replace the pistons for a lower compression ratio, but I'll probably just run a meth kit instead.

10-02-2012, 07:53 PM	#5
SkullWorks Banned Join Date: Mar 2012 Drives: SSM LT MT BRZ Location: SoCal Posts: 1,033 Thanks: 803 Thanked 754 Times in 328 Posts Mentioned: 23 Post(s) Tagged: 1 Thread(s)	I would assume they did this to avoid loading the eccentric part of the bearing shell? I was just discussing the effects of having the split line at a 45degree angle to the major load of the part.

10-02-2012, 08:08 PM	#7
Entropy Oversteer > Understeer Join Date: Jul 2012 Drives: GT86 Location: PDX Posts: 87 Thanks: 17 Thanked 39 Times in 17 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Pauter rods? Looks real nice.

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