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#1
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3.3 H6 with 230hp vs 3.0 H6 with 250hp?
OK, our cars have the 3.3 DOHC H6 with 230hp, but several newer Subies have this 3.0 H6 with 250hp...does anyone know what the exact differences are in the engines? Are the 3.0 H6 heads that much better, and would they fit on the 3.3 H6?
I'm looking to eventually build up a great Subie H6 for another project, and would like some input on possible hybrids, etc. I will need to build whatever it is up a bit and likely lower compression a bit for up to a 15psi SC unit, but I'm looking for the most bang out of the engine platform itself before I add boost. Thanks!
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'92 Pearl White LS-L Touring SOLD 4.44 Swap, trans cooler, trans filter, trans temp gauge Color-matched rear body and spoiler, X-drilled and slotted rotors, Axis pads, s/s lines Raxles front axles |
#2
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The only 3.0 H-6 that I know of is offered in the Outback... and it is 212hp... Where is this 250hp H-6???
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#3
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if that's the engint that you are talking about then the Cam set up is diffrent... The engine is 300cc's smaller ... And it is an interferance engine.... Ours is so much better
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2020 Subaru Outback Touring - Wife's first Subaru 2005 Volvo V70R - 5-cylinder love! :Heart: ** SOLD **1998 Subaru Legacy 2.5GT Wagon - MOST RELIABLE car I've ever owned ** SOLD **2006Subaru WRXSTi (Former "Boxer4Racing.com / Continential Tire" STi) - Built EJ22t block / EJ207 JDM STi "big port heads" - 9,000rpm MONEY PIT!!! ** SOLD ** 1995 "Tree-Hugger Green" SVX L AWD(5 MT) --- "Gumby" 130K miles #399 in MY95, my original love... |
#4
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The new 250 HP USDM '05 Legacy is using a variant of the 4-cylinder STi motor. One version of the new Legacy in Japan uses an H6 motor.
A 4-cylinder 2.5L STi motor in an SVX sounds very interesting to me. Probably would have to use a custom ecu. Not really any aftermarket ecu's available for the STi motor yet though because of the throttle by-wire design the motor uses. Seems that the aftermarket ecu guys have some worries about making it work correctly.
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#5
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Just checked Subaru's site...I could have sworn the material on the new H6 said 250hp...
OK, new question...What would the best buildup for the 3.3 H6 be, going for reliability, power, and ability to handle boost? I'm looking to add about 15psi from an Eaton or Lysholm SC, the engine will be mated to a manual and an AWD system with a fixed, rear-biased center diff. Thanks!
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'92 Pearl White LS-L Touring SOLD 4.44 Swap, trans cooler, trans filter, trans temp gauge Color-matched rear body and spoiler, X-drilled and slotted rotors, Axis pads, s/s lines Raxles front axles |
#6
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What do you mean by a "fixed" center diff?
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#7
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Kenneth 1997 Subaru SVX LSi "Svetlana" #185 of 640 - 09/1996 - Polo Green Pearl - 34k miles 1992 Subaru SVX LS-L "Everett" #8738 - 01/1992 - Ebony Pearl - 139k miles - 5MT shifty - Sold 07/31/2011 1992 Subaru SVX LS-L "Sven" #1599 - 05/1991 - Claret - 168k miles - Traded 05/11/2005 2023 Subaru Crosstrek Limited CVT - Crystal White Pearl - 2.8k miles 2021 Subaru Forester 2.5i Limited CVT - Horizon Blue Pearl - 17k miles 2023 Volkswagen Jetta S 6MT - Pure White - 2.6k miles 2020 Hyundai Ioniq Limited EV - Ceramic White - 30k miles |
#8
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best buildup for the eg33
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SV What? |
#9
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In Sweden, a Legacy 3.0RS spec B, is released, gonna have 245HP AND a H-6 AND a 6-speed gearbox !!
/Sonny
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Internal name: "SuperSonic" -92 ebony black with 170k KM *** -Stress is when you wake up screaming & you realize you haven't fallen asleep yet. *** |
#10
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I've been asking SOA to get me that forever. They bring it in, I'll get one. ****, I'll even get in line. As for hybrid, I am thinking of switching my SVX to run on things other than gasoline. In IL, the state will fund 80% of your cost for conversion. Perhaps next year, I'll have to do a ton of mods on this car.
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Lwin M. Maung (Member # 147) Current SVX: • NONE Previous SVXes: •1994 LE Barcelona Red 107k • 1992 LS-L Pearl White 143k • 1994 LSi Bordeaux Pearl 220k • 1992 LS-L Ebony Pearl 184k • 1992 LS-L Liquid Silver 145k • 1992 LS-L Liquid Silver 102k • 1992 LS-L Ebony Pearl 123k Other current cars:•2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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#11
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The mag stated a 6-speed gearbox, I thought it was a MANUAL , it is NOT, it is a 5-speed AUTO with Lockup , maybe that counts a a 6-speed ... I dunno...
Here it is : http://www.subaru.se/legacy_tek.shtml /Sonny
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Internal name: "SuperSonic" -92 ebony black with 170k KM *** -Stress is when you wake up screaming & you realize you haven't fallen asleep yet. *** |
#12
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3.3 vs 3.0
The 3.0 is shorter, (along the crankshaft) lighter, and has, I believe, no interchangable parts. We have to work with what with what we have. 7 main bearings, forged rods and crank, low center of gravity. All good stuff.
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#13
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Though I see this engine uses the same type Inerta Resonate Inlet system that the SVX has. When your got a good system, use it. . Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#14
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Alan 1987 928 S4 (Black) SOLD! 1997 SVX LSi (Ebony) SOLD! 2005 Legacy GT (Silver) [Cobb Stg 2+] SOLD! 1987 928 S4 (Black) SOLD! 2005 Forester XT Premium (Crystal Gray Metallic) SOLD! 2008 Lancer Evolution X MR (Apex Silver) [Cobb Stg 1+] 2015 Outlander Sport 2.4GT AWD (Mercury Gray) 2013 G37xS (Obsidian Black) |
#15
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subaru made a 4 cyl engine with the same piston sizes as the eg33 but lower compression. The easiest thing would be a piston swap from that engine. I can't remember the model number anymore though. This route would be a heck of a lot cheaper than custom forged pistons.
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