wrx heads+turbo legacy block= what compression ratio?

jake15 · Post by **jake15** » Thu Apr 22, 2004 6:54 am

well like the title says i need to know what it would be and how well it would work. thanks

rsstiboy · Post by **rsstiboy** » Thu Apr 22, 2004 2:13 pm

which block? there are quite a few

THAWA · Post by **THAWA** » Thu Apr 22, 2004 2:16 pm

I'm assuming he measns the ej22 block. The only one in america so far

boostjunkie · Post by **boostjunkie** » Thu Apr 22, 2004 2:46 pm

Search for any posts from Ciper. He's done A LOT of research on this topic . . . be ready to be reading A LOT!

Matt Monson · Post by **Matt Monson** » Thu Apr 22, 2004 10:16 pm

http://www.bbs.legacycentral.org/viewtopic.php?t=14464

here you go...

jake15 · Post by **jake15** » Thu Apr 22, 2004 10:42 pm

Thanks guys

morgie · Post by **morgie** » Fri Apr 23, 2004 4:18 am

I am presently building that setup .. (well, with Legacy TT heads in fact.. but it's almost the same)

WRX heads on ej22t block gives about 7.3:1 CR wich is quite low.

I have some custom pistons being fabricated now at CP Pistons to raise that to 8:1 . You might want to use that "recipe" too

and while you are there.. forged + lightened rods ?

jake15 · Post by **jake15** » Fri Apr 23, 2004 6:03 am

what year are the heads you have morgie? i assume you have the twin turbo intake? would the twin turbo intake and heads work well if it was converted to single turbo and say bolted onto a 2.2t block? i was talkin with my dad and he said the wiring for the wrx intake would be to much and we just happen to have a jdm twin turbo engine lying around. i am planning on having internals made but i will probably run it with the low compression for a while since i have little $$ for stuff.

morgie · Post by **morgie** » Fri Apr 23, 2004 1:57 pm

i'll do it quick since i'm short in time :

The WRX intake dont bolt on the legacy heads. The heads i have are from 97-98 since they are "bucket and shim" type. I dont have the original Intake, but i have an intake from a 96 WRX that will bolt on. I'll simply block the holes on the driver side head and use it on a single turbo setup . The heads fits well onm the ej22t block.

Matt Monson · Post by **Matt Monson** » Fri Apr 23, 2004 7:09 pm

why spend money on new rods. The stock ones, like the crank are already forged. Just get them cleaned up and cyro treated and call it done. That's what I am doing. And you can get pistons from Axis if you don't want to wait for a custom job to get done...

morgie · Post by **morgie** » Fri Apr 23, 2004 10:14 pm

axis take their pistons at CP and take a % ..

calling CP directly saves some $$ hehe

The forged rods are not only forged.. but are aslo lightweight, with better bolts ... wich allow higher RPM's

Matt Monson · Post by **Matt Monson** » Sat Apr 24, 2004 12:27 am

I wondered who did Axis' pistons. As for the rods, how far do you want to rev? Guys are revving to 7500-8000 rpms on stock rods. For me, I am going to save that money. But then I am doing a wussy build and only using a vf-29...

morgie · Post by **morgie** » Sat Apr 24, 2004 2:02 pm

well, stock rods might be hard, but surely not as hard and light than custom forged ones. I want to rev around 7500rpm.

The engine is all torn appart now. I'm installing forged pistons, so why not change the rods in the same place and have a complete peace of mind of having a block capable of handling crazy hp. With stock rods you will always have the fear as "will it handle it ? am i pushing to hard?"

But, it's true that for a 300hp setup, there is no need for all that. Also depends on what use you'll do with the car. My car will be abused a lot.. a lot of racing.. so i want it to be as hard and endurant as possible.

jake15 · Post by **jake15** » Sun Apr 25, 2004 3:28 am

i'm in the same boat as morgie

Steeper · Post by **Steeper** » Fri Oct 26, 2007 4:45 am

reviving a million year old thread

Has anyone tried just using the 2.2l NA head gaskets, I know they're thinner, but I dont know by how much or how much that will affect the CR....AND anyone from this thread have results from their build? Dyno runs? butt dyno.

I am going to go ej22t from my 93 tleg, 02 wrx heads, and for now, just run the 2.2 computer and a Emanage on the wrx intake and injectors. Oh yeah, vf22 and FMIC in the summer, wrx TMIC in the winter. I know I can get it to work, but I am concerned about the low CR. NOTE, this is a budget build for now and when I feel like dropping a couple K I will go standalone OR get a stock wrx computer and wiring harness. I am getting all the sensors and everything off the intake with the heads for cheap (blew a timing belt and bent a couple valves)

also have tubular header, 3" SS turbo back, wrx tranny, act clutch and R180 rear diff (02 jdm sti) and wrx 4pot/2pots. I have some brembos from V7 sti but I've decided to go 4pot/2pot so I can run 15 inch wheels... Eventual goal is 400 HP but I think 300 is more reasonable with the electronics I am going to run for now.

555BCTurbo · Post by **555BCTurbo** » Fri Oct 26, 2007 6:13 am

Does the Emanage allow you to reconfigure to run the WRX cam angle sensors?

If not...that shit won't run buddy

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wrx heads+turbo legacy block= what compression ratio?

wrx heads+turbo legacy block= what compression ratio?