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Old 07-31-2014, 06:50 PM   #1
COwrxboy
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Member#: 282129
Join Date: May 2011
Chapter/Region: RMIC
Location: Golden, CO
Vehicle:
2014 GTX3076'd WRX
Black

Default A Few questions about building my motor.

So my 2014 WRX finally blew up! I knew it was coming because I was playing with fire! We put down 485 WHP and 495 WTQ corrected on a stock block with a custom rotated GTX3076 kit. So now it is time to build the block.
Here is what I have talked to a few shops and what they have recommended.

Benson sleeved block and possibly o-ringed if deemed necessary.
ACL Rod and main bearings (standard size)
JE Pistons 100mm with a comp ration of 9.5 or 10.5
New Sti Crankshaft
Carrillo Pro-A Connecting Rods
ARP Hardware

Here is where the questions are. Is that a strong enough rod? Should I be looking at the H-Beams? What are people thoughts on o-ringing? Any other thoughts for me?

I am shooting to max out the GTX 3076 and possibly jump up to the GTX 35 and go even bigger! So seeing 700 hp shouldnt be to hard on e-85
I would like to over build this motor so that I am not running on the ragged edge of its limits so there can be a "bit" of reliablility.

Thanks for looking everyone!
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Old 07-31-2014, 06:55 PM   #2
user1029
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Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86, Meth, 272s, Cos IM

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Carrillo makes great rods. Go with closed deck, O-ring, and 625 head studs you'll be good for 700hp easy
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Old 07-31-2014, 06:59 PM   #3
silver2007impreza
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Member#: 397800
Join Date: Jul 2014
Location: florida
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2007 impreza
silver

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i perfered the weiscos no piston slap and thicker ring lands
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Old 07-31-2014, 07:01 PM   #4
silver2007impreza
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2007 impreza
silver

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i would go with h beams as well. made 487 whp with them zero problems
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Old 07-31-2014, 07:27 PM   #5
user1029
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Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86, Meth, 272s, Cos IM

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go with Manley I-beams for a whole lot of headroom, if not H-tuff if you were to switch to Manleys
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Old 07-31-2014, 07:35 PM   #6
COwrxboy
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Member#: 282129
Join Date: May 2011
Chapter/Region: RMIC
Location: Golden, CO
Vehicle:
2014 GTX3076'd WRX
Black

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I'd like to stick with Carrillo, lots of great results from all of the shops in this area. I was just wondering if the pro-a was enough rod or if I should go with the H rods.
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Old 07-31-2014, 08:17 PM   #7
thisisthenewsic
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Join Date: Aug 2007
Chapter/Region: SCIC
Location: murrieta/south of riverside
Vehicle:
05 legacygt,00 OBS
red 95 supercharged nsx

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closed deck> sleeved

also seeing 700 on a 3076 is a far stretch. also if doing a closed deck, to 99.75 pistons.
also i wouldn't go with high compression pistons. I've read about testing and low compression made more power.
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Old 08-03-2014, 04:25 PM   #8
kakarot09
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Chapter/Region: SWIC
Location: Northern Nevada
Vehicle:
08 Sti
Wrbm

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I would personally go with the H beams. You're looking to maybe build further using a gtx35 so that will give you the head room. Also, make sure you're blueprinting all the measurements. You listed standard size ACL bearings but sometimes they need to be extra clearance etc.
Compression ratio depends on the fueling. You can make power with good fuel but don't run 10:1 on 91 octane or something.
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