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#1
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OEM Conrods worth it?
Okay so my new build will be a bit on the cheap side. I'd LIKE to do full internals but I also know I'm really going budget where I can. I want to do the pistons to OEM spec or maybe even LAN's 11:1. IDK really, but I have low goals and this will get either rebuilt again in the future or I'll build another one to replace it. I just want to know how competent are the OEM rods? Just a PnP and a valvetrain rebuild for the most part with a light hone to the cylinder walls to make sure they aren't scored and slap it all together. I just want to know if I'm staying way below or at 300BHP will i run into issues with the OEM conrods? I'm not looking to make a monster and likely won't even see 275BHP but just in the off chance I wanted to know.
Discuss....
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94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#2
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Re: OEM Conrods worth it?
You may hear a lot of opinions of with and against right now. But I tell you this...
Never gamble with the engine's internals. What if one breaks? What would happen to your engine? It is up to you.
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Danny 1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. |
#3
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Re: OEM Conrods worth it?
stock rods with ARP fasteners will be good
Tom |
#4
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Re: OEM Conrods worth it?
Jack Laverty kicked out a stock 140,000+ mile rod only because he:
A) Was making 318 whp B) Was revving to 8200 rpms C) Lost oil pressure due to 1.5+ G's of lateral acceleration which starved the pump. A street car on street tires driving on the street will never see this kind of cornering force. For just about anything else I think you'd be fine. |
#5
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Re: OEM Conrods worth it?
Quote:
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'07 Outback (Legacy) Pearl White > 3.0R Premium, stock (50,000km, Wifes daily driver. Owned from new) Not For Sale '92 SVX Black on Pearl White > 6spd, DCCD on the way. (260,000km, My daily driver, 2 previous owners) Not For Sale '93 SVX Black on Charcoal > Aftermarket rims.(250,000 km, Dad's daily driver, unknown owners) Not For Sale '93 SVX Black on Burgundy > Completely stock, under preservation, treated like a princess. (55,000km, 1 previous owner) Not For Sale '92 SVX Black on Burgundy > Completely stock, under preservation, treated like a princess. (144,000km, 2 previous owners) Not For Sale Wife, Red Hot when riled > Treated like a princess. Minister For Finance, Domestic Affairs and Diplomatic Relations. Definitely Not For Sale My Wanted List: http://www.subaru-svx.net/forum/show...178#post632178 |
#6
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Re: OEM Conrods worth it?
Quote:
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94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#7
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Re: OEM Conrods worth it?
Doh... I knew I forgot something.. |
#8
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Re: OEM Conrods worth it?
Indeed... Now to figure out HOW ON EARTH TO JUSTIFY COST ON PISTONS! What's the stock ratio anyways? Are LAN's 9.3's=OEM? I want a little more but I don't think it's worth the 11:1's... Oh well goals aren't high anyways. More like making a fresh motor that HAPPENS to put out a little more. Tom and Bob I think I'll be PMing you guys with a few questions as I wish to pick yo brains!
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94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#9
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Re: OEM Conrods worth it?
stock CR is 10:1 if I remember correctly...
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Former: 1994 Barcelona Red(x2), 1995 Brilliant Red, 1992 Liquid Silver, 1992 Ebony(x2), 1992 Pearl White (x2) Current: 2017 Ford Raptor 2017 Kawasaki KLR 1995 Guards Red Carrera 1995 Spec-ish Miata - track car 1957 CJ-5 |
#10
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Re: OEM Conrods worth it?
Are you doing anything for engine management? With the stock MAF maxing out in the 250 HP range there isn't a whole lot of room for improvement without going to a different support system. Although most of our engines are old and tired, so bringing them back to even stock power levels is an improvement.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#11
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Re: OEM Conrods worth it?
Quote:
__________________
94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#12
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Re: OEM Conrods worth it?
Another alternative is going with STi rods and ARP bolts. Little more margin and you should be able to pick up some from over at NASIOC when they upgrade to aftermarket rods.
-Bill
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#13
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Re: OEM Conrods worth it?
Good point but I'll save that for the next step of the build. Hell pistons might even be put on the second part of the build. LAN's pistons are PRICEY! And what's with the 9.3:1 of stock is 10:1? How much change on the low and high end is that 0.7 in compression gonna change things? If it won't hurt top end(which really isn't my worry as much as low end) and I can level out my tune on the MS2 to really boost up my fuel consumption efficency then HELL YEAH!
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94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#14
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Re: OEM Conrods worth it?
Bump for answer about the piston specs?
__________________
94 Bordeux Pearl LSi (Jun 2009) 109k Plate:GADDIS What they call it a vanity-plate. Shouldn't I be obligated to be vane with it? Rota Tarmac 3's 18x8" on 245/40/18 Dunlop SP Sport 600's, Perrin light weight crank pulley, PRW radiator, custom coilovers(not GC's), 9006 HID 4300k 50W low beams, DIY garage door lip, and SVXfiles brake kit. Fixxed exhaust so no more sweet sound. 97 White/Black trim Impreza Outback Sport (March 13/08) 150K-180K(sensor broken)Good news is EZ30R and 05' 6speed full powertrain swap is in motion!: Will be doing more work as I can. Gonna be run by a Hydra so yeah fun to be had. [SIGPIC][/SIGPIC] -Gaddis |
#15
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Re: OEM Conrods worth it?
stock pistons will be more than enough for what you are looking for.... Yes they are 10:1. I see no reason to use any other pistons with an engine you are basically keeping stock
Tom |
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