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#61
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whoa thats a ton of info comming back to this thread! Anyways, it has been said that the SVX pistons are indeed slightly larger (Bore) than the Ej22t. Thats what i understand, SO why is should we not slightly overbore the EG33 to handle custom pistons that would go ahead and run a lower C/R? Why is everyone biting for the Ej22t? If you are buiolding an engine to run boost, you are going to spend a good deal of money, why chop yourself off at the knees and buy cheaper pistons? Your best bet, if boosting high levels, is to have custom pistons made for you. Not cheap but very effective and will prob cause less problems down the road.
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#62
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I've said it before. Doing modifications of this type, you can't go cheap. Spend the money, do it right. Custom pistons aren't that expensive anyway.
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Collin 1995 L AWD Locker 1987 Porsche 944 turbo 80k miles. MBC + Chips. Relatively Stock |
#63
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For instance, with Ford, if you take a 351 Windsor block and adapt on 351 Cleveland heads, you can get much more performance than either engine modded up on its own. Doug
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1992 LS Touring (6/91) - Currently undergoing a five speed swap Black over Claret with spoiler; 235,000 miles; Mods: 2002 Legacy 5 speed, ACT Pressure Plate, Excedy Clutch, Short Throw Shifter, Aussie Powerchip 1992 LS Touring (6/91) Black over Claret with 2.5" setback spoiler; 202,000 miles; Mods: B&M Cooler 1994 LSi (4/93) Bordeaux Pearl; 198,000 miles; Mods: Weight reduction. 1969 Mustang GT Convertible 1970 Mustang Convertible 2000 Ford Excursion Sola lingua bona est lingua mortua. My Locker |
#64
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Piston facts.
Wow lot of confusion. The facts as I see them are, the EJ 2.2lt turbo pistons will fit the EG3.3 bore, they are the same bore size, the wrist pin height and offset will be the same, They have the same selective fit as the SVX.
The piston crown height is what controls the compression ratio, they did not change the combustion chamber volume on the EJ 2.2 when they built the turbo, they just fitted pistons with a lower cut out in the top of the piston. These pistons lowered the EJ 2.2 's, 9.4:1 ratio to the turbo's 8:1, a drop of 1.4. If these pistons were fitted to the EG 3.3, the compression ratio would drop from 10:1 to 8.6:1. I know that the SVX pistons have a raised lump, of about 1 to 1.5 mm on them, instead of a cutout that the EJ2.2 has(according to Wayne), so our cylinder head volume may be larger (may be due to bigger valves?), but the Turbos pistons will still drop the ratio by 1.4:1 at least. 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. |
#65
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but with all pistons in the engine being different like that thread suggests, won't that throw a wrench in things?
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#66
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Re: Piston facts.
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#67
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So when you are getting the EJ 2.2 turbo pistons, you order the A,B or C size, to suit the, A,B, or C bore size that your particular engine has. Not a problem. 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. |
#68
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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. |
#70
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I've attached a file that shows some of the specs...looks to me like the 92 turbo pistons would work, but then again I've never seen inside a Subaru engine so anything I think is highly suspect.
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#71
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If someone with a fast connection could search for pics of the top of both 2.2 & 2.2T pistons, it would help in solving this quest. 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. |
#72
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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. |
#73
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what is the stroke on the 2.2l motors? I am not sure if this popped up sooner (thats a whole lot of technical stuff) so if anyone could answer me that would be great. In eefect if the stroke for the 2.2Lt is too short, it could infact raise the C/R right? I would imagine it is a relative so just another wrench to throw into things
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#74
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This is just some random thinking on my part but it seems Subaru likes to keep things simple. If you cut two cylinders off the 2.2L motor you end up with 1.1L. With 1.1L/2cyl. you end up with 3.3L with six cylinders.
Much cheaper to build a 6 cyl motor based on an existing 4 cyl motor. Granted there are many differences, but exactly how many sililarities are there? |
#75
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