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Old 02-19-2005, 04:56 AM   #1
snowman4us
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Thumbs up EJ20G into a WRX

well, i cant seem to find my other thread about this so ill just let some of u know how everything ended up.

i put a EJ20G bottom end into a WRX.
I had to get a EJ20G headgasket to make the CR lower, due the the EJ20G piston coming out of the block .015"(if i remember corectly). the Compretion ration ended up about 8:1-8:2 range using the WRX(usdm) heads.

if u plan on using the WRX 5speed w/ this sway you will have to helicoil a thred into the bell housing of the tranny for the lower starter bolt. also the ej207 engine has 7 bolt holding the tranny on, but the EJ20G only has 4, so u will have some tranny bolts left over.

so today was the first day of street tuning, at first the engine has a missfiring problem on the cyl. #4. due to the u-tec being erased by someone . after a little tuning without a wideband(just a safe tune, but the readings are saying 12.1-12.4 during WOT, so i thinkg thats good untill i can get a hold of a wideband(the one i was going to use crapped out on us, i think the senseor went bad on it). but anyways, the car has the following mods: 3TBE, VF-23, Injectors, intake, EJ20G ,WRX heads(stock USDM), U-tec, we where able to race a couple of the local scoobys for comparison. Racing an STi w/ a TBE it was even from a roll, but from a stop the STi won. Raced a WRX w/ a T3/t4 settup(w/ a realy conservitive map, 18psi) it was even as well(cant seem to figgure out his it was even w/ a garett turbo)...
this was all done at only 18PSI...FMIC and ill be ready for more boost, and then a bigger turbo . then the tranny will probably crap out so, you know the rest. w/ race gas it should be even quicker....

only thing im wondering is how mutch boost can this combination can hold. but seeing how it was a better bottom end i would think it could be around 400WHP w/o having to worry to mutch.

hope this helps

mods if u find my other post w/ a whole bunch of reading i took you can put this in there, i cant seem to be able to locate it.

this car is owned by godfather1212.



kirill
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Old 02-19-2005, 11:17 AM   #2
DuoMaxwell
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With a bigger turbo and better cams you could probably hit 400. There is a guy boasting a ver 3 in Okinawa CLAIMING 420ps with a TD06-20G on a EJ20K engine. If the 20K can hold over 400 I know the G definately can!!!
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Old 02-19-2005, 11:44 AM   #3
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im glad somebody finally did this and has some info.
thanks

ej20g closed deck or open?
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Old 02-19-2005, 12:39 PM   #4
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Check my other post in this section. For the most part EJ20Gs are closed but there is one that is an open deck!!!
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Old 02-19-2005, 12:41 PM   #5
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closed
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Old 02-19-2005, 01:51 PM   #6
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Quote:
Originally Posted by 99WRXEJ20
im glad somebody finally did this and has some info.
thanks

ej20g closed deck or open?
it is a fully closed deck engine.

the major thing holding the car back curently is the stock TMIC. i forgot the check it for heat soak after the WOT runs, but seeing how we where starting to have issues top end of the powerband, if we did consecutive runs, i can safely say that the TMIC is way passed its efficency...to keep it from detninating(sp?) top end we are dumping allot of gas past 6K-redline...we inceased fuel from .5 to like 2.2 or something.
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Old 03-04-2005, 08:51 PM   #7
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Old 03-04-2005, 10:16 PM   #8
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Quote:
Originally Posted by snowman4us

only thing im wondering is how mutch boost can this combination can hold. but seeing how it was a better bottom end i would think it could be around 400WHP w/o having to worry to mutch.
Better bottom end then what?? a EJ205...I dont think so. Closed deck doesnt mean anything at 300-400whp. Still has the same rods and pistons as the EJ205.

If you want to keep your stock rods straight at 400whp you better have your tune worked out...one good knock event and that closed deck engine will be going straight to the scrap yard.

Knock is more prone to happen at your engines peak torque output.... I would guess around 4500 rpms, dumping fuel at 6k isnt helping anything.

You should be safe on that vf-23 just dont let it knock
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Old 03-04-2005, 10:47 PM   #9
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Yes what Steve is saying is true but then your not gonna stroke that EJ205 so it should hold about 350 safely!!
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Old 03-05-2005, 02:01 PM   #10
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it looked like the rods where actualy a little diff. in the EJ20G, looked a little bigger. but i can remember exactly.

and w/ this car we are shooting for around 300-350WHP....or more if the owner wants.


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Old 03-05-2005, 09:36 PM   #11
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You start running that high compression junk on a EJ20G and you gonna have a nice time buying a new block!!!
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Old 03-05-2005, 09:49 PM   #12
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You used a mid 90's EJ20 block from Japan??? good luck finding bearings when those let go. Don't ask how I know........... but I'll tell you they use a different crank and the bearings, crank and block share nothing with any US block.
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Old 03-05-2005, 10:53 PM   #13
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uhhh....the bearings are all the same as far as i know...it has the same bore and stroke as a normal EJ20. so i dont see a problem w/ finding parts...the only thing that is hard to get is the gasket kit and thats about it, and i can get those
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Old 03-05-2005, 10:55 PM   #14
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Quote:
Originally Posted by DuoMaxwell
You start running that high compression junk on a EJ20G and you gonna have a nice time buying a new block!!!
high CR? uh if u think 8.2:1 is high, i dont know what low would be for u...some ppl acuatly like being able to spool turbos before 5K. plus a stock USDM WRX has a CR of 8.0:1 and the USDM STi is like 8.5:1 if i remeber corectly.
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Old 03-05-2005, 11:36 PM   #15
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Quote:
Originally Posted by punkrocksailor
You used a mid 90's EJ20 block from Japan??? good luck finding bearings when those let go. Don't ask how I know........... but I'll tell you they use a different crank and the bearings, crank and block share nothing with any US block.
The USDM block is a phase II. You might have more luck getting early EJ18 or EJ22 bearings. What was different on the JDM engine that shares nothing in common with any US block?
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Old 03-05-2005, 11:40 PM   #16
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The rods and pistons are completely different, the crank is different, we had one blown early JDM EJ20g and a blown wrx and tried fitting different parts together and baically nothing worked together.
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Old 03-05-2005, 11:46 PM   #17
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AHH HAAA like i said the USDM block is a phase II, most of those parts will not work in Phase I engine without mods. Did you take any measurements?? Bearings and rods from a EJ18 will work in the JDM block.
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Old 03-05-2005, 11:49 PM   #18
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Quote:
Originally Posted by Scoobie Steve
AHH HAAA like i said the USDM block is a phase II, most of those parts will not work in Phase I engine without mods. Did you take any measurements?? Bearings and rods from a EJ18 will work in the JDM block.
i was talking to noah at cobb, and he sold a crank to one of my good friends. and he said just to go and normal bearing...
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Old 03-06-2005, 09:55 AM   #19
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Quote:
Originally Posted by snowman4us
high CR? uh if u think 8.2:1 is high, i dont know what low would be for u...some ppl acuatly like being able to spool turbos before 5K. plus a stock USDM WRX has a CR of 8.0:1 and the USDM STi is like 8.5:1 if i remeber corectly.


No the Ej20g has the standard 8.x.x compression ratio thats normal. When you start upping the compression on the engine things seem to let go a tad faster than most people would like. We seen three let go this past Aomori rally season!!!
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Old 03-06-2005, 12:33 PM   #20
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like i stated earlier, the CR is only 8.2:1...if u keed the boost around 20PSI at the 1/4mi it will be fine. and like 17 for Daily Driving and the track.

just wondering what CR do u consider "normal". becoue if u run ur CR in the 7's, u will be able to boost allot, but u wont be able to spool at turbo untill u get a bit to high in the RPM range. making the power curve a little to aggresive for DailyDriving and trackuse(i asume, never had a chance to go out to a track, they are all to far)
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Old 03-08-2005, 03:03 PM   #21
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I was considering a EJ20G with a Toda Stroker Kit, would this set-up give me a reliable 400whp with a pnp USDM '03 WRX Head? Besides the tranny issues stated above bolts and starter nonsense, I should get a pretty reliable motor, right?

Other than Head gaskets, I won't have clearance issues with the Head or would I need to get different mm head gaskets to see which works best?
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Old 03-09-2005, 08:45 AM   #22
snowman4us
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u will need an EJ20G head gasket.
also if u are going to put that mutch money into the block, u should consider getting stuff done to ur heads.
Heads give u more improvement then the block will. if anything, just rebuild the EJ20G and get the heads rebuilt w/ bigger valves, shim under bucket conversion, 5angle valve job, and diff. cams. if u did that 400WHP would not be hard to achive, but at that point u will need a BIG turbo, and a good amount of ther suporting mods. Plus ur tranny wont last mutch more then 300WHP if u drive it even somewhat hard.


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Old 03-14-2005, 03:38 AM   #23
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Default ej20g

Hey guys...I just picked up a 1995 wrx clip and I was wondering what you think it's capable of safely producing with bolt ons and tune. I going to drop the motor into a 1995 L and I've been trying to do research but I'm coming up short. I thought that all ej20g's were closed deck. Which one's aren't?
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Old 03-15-2005, 01:43 AM   #24
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u have to look on the serial # on the engine...and compare it.
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Old 03-15-2005, 11:20 AM   #25
Jaxx
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i wouldn't worry about it
the closed deck hype is just that .. hype
i would check to see if it is a sedan/wagon auto/manual
you don't want wagon or auto much less powerfull
be sure to get the harness and ecu
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