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#1
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EJ22T pistons
I've been researching the hell out of the SVX for a couple months now (month or so before I bought it is when I started) And I have ran into something.
A lot of people are apparently using EJ22T pistons in the EG33 block. I mean it makes sense, it is basically an EJ22 engine with 2 extra cylinders added on. Now everything I have read of to this point is internet chatter. Some people claimed they run them and it lowers the compressions ratio. I would like to run them on my build, but a forged set and bore it .20 out. Let me know if anyone has any knowledge of this!
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1992 SVX: JDM STI short geared 6-speed swap, COBB short shifter, slotted cross drilled rotors, Smallcar Clear headlight lenses, 1997 Grill. 1992 RHD WRX: EJ20G, 16G, Cusco Coilovers, Wilwood 4pot/2pot brakes, Defi Genome 60mm gauges, Exotic speed downpipe, 3.5" A'PEXi spec GT catback |
#2
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Re: EJ22T pistons
Who is running Ej22T pistons in an EG33? In this forum?
Man, compression will go waaaaaaaaay down to 7.1:1 (or something)... And THE SEARCH BUTTON is your bestestest friend
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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: EJ22T pistons
AFAIK stock compression ration on the EJ22T is 8.0, so that would be the same as the compression you should get on the pistons swapped into the EG33.
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'93 Legacy LS (will last longer than the cockroaches) '94 SVX LSi |
#4
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Re: EJ22T pistons
Who told you that the head domes of both engines is the same for you to conclude that?
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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. |
#5
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Re: EJ22T pistons
Do cranks have same rotational offset??? also are they both using same con-rod length???
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#6
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Re: EJ22T pistons
well doing more research, the pistons will drop cr to 7.9:1 which is just fine for me. The rods ARE the same as all EJ rods EXCEPT for N/A 2.5 rods. There is some Journal differences but EJ22T rods have the same journal sizing (48mm i believe)
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1992 SVX: JDM STI short geared 6-speed swap, COBB short shifter, slotted cross drilled rotors, Smallcar Clear headlight lenses, 1997 Grill. 1992 RHD WRX: EJ20G, 16G, Cusco Coilovers, Wilwood 4pot/2pot brakes, Defi Genome 60mm gauges, Exotic speed downpipe, 3.5" A'PEXi spec GT catback |
#7
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Re: EJ22T pistons
Quote:
BTW, here you saw the 7.9:1 compression or was it here?
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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. |
#8
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Re: EJ22T pistons
I haven't heard of a motor running a ratio lower than 8.5:1, wonder how thats gunna work out.
My very limited research is the rods are about the same, as to the best of my knowledge Eagle only makes one Subaru rod for several motors. |
#9
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Re: EJ22T pistons
ej22t stock engine on 1991-94 turbo legacies was under 8 something.
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1985 Brat GL 138k 91 CRX Si 40k 91 CRX Si 155k 97 SVX Lsi 70k 2003 s2000 91 RT4WD 166K |
#10
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Re: EJ22T pistons
This guy on eBay claims that the SVX in the auction was running EJ22T pistons for 20k without issues, and using regular unleaded the whole time. He's also claiming the compression ratio was 8:1. Maybe ask him directly thru ebay if he had any problems? Maybe he's even a member here?
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Ebony/Gray '92 LS-L, @123k - bought 01/17/2010, parked for 10 years. Getting back on the road. |
#11
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Re: EJ22T pistons
Quote:
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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. |
#12
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Re: EJ22T pistons
Quote:
Ask Tom. But im pretty sure he said that running EJ22T pistons in a EG33 will be to low compression for any turbo projects any one would want to do.
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1992 NZDM SVX Maroonish Red/Black ( 1st car ive owned with an cd player ) Has been retired 1989 Vortex 6 Maroon 1983 RX Silver Grey 1973 1400 GSR Yelo 2 Door Coupe awaiting Restoration |
#13
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Re: EJ22T pistons
The NA 2.5L rods, years 2000 up are 1mm longer. The crank pin and piston pin are the same as SVX.
Use late 2.5L rods, and then trim the piston top accordingly. You will end up with a dish that is 1mm less deep, slightly raising the comp ratio. Of course the top ring will be 1mm closer to fire, but the compression distance is already substantial on these pistons.
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#14
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Re: EJ22T pistons
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#15
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Re: EJ22T pistons
Tom,
I mentioned it, trim the piston top accordingly, to compensate for the longer rod. Actually, one would be able to set a specific quinch area by exact machining of the piston top [really the flat area around the dish], but the amount to remove from the top is +/- 1mm/.040". As I said, you have effectively raised the bottom of the dish by 1mm, and that will raise the compression ratio accordingly.
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Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 |
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