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Old 04-09-2012, 09:10 PM   #376
Equilibrium Tuning
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Lots of heads being sent in and lots of inquiries!

-- Ed
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Old 04-10-2012, 08:39 AM   #377
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Got mine back...they looked great! Thanks Ed!
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Old 04-24-2012, 05:42 PM   #378
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Thank you! More heads coming in and going out!

-- Ed
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Old 06-23-2012, 01:33 AM   #379
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Hey i have been following this thread and others like it for some time now but have had trouble finding answers to the one question i keep asking myself. Is there any advantage of building a hybrid ej257/207 over building a full ej257? I figured the cost of building a 257 would be higher since the 2.5l may be more desirable amoungst tuners.

The reason i ask is because like most people on NASIOC i love my subi and plan on making it a track car when i graduate an Engineer. As of now i have an ej255 (same bottom end architecture as the ej257). Right now im looking for the most affordable and reliable head/block combo. My goal is to eventually make 475-525WHP using either a gt30 or gt35 to compete in regional autox and time attack events.
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Old 06-23-2012, 10:38 AM   #380
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The reason for this cost. If you have a popped 205 with good heads, the price of a new 2.5 shortblock is only marginally more than a 2.0. So this is a pretty cost effective upgrade
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Old 06-23-2012, 05:01 PM   #381
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Quote:
Originally Posted by biodude View Post
The reason for this cost. If you have a popped 205 with good heads, the price of a new 2.5 shortblock is only marginally more than a 2.0. So this is a pretty cost effective upgrade

Thanks for the reply buddy, so basically its only worth doing a hybrid if you already have the 2.0 heads since going out and buying them would pretty much require spending the extra $400 to mimic the 2.5l chamber and thats not including a P&P or any other machine work that may be required... I was kinda hoping the 2.0L would be lighter or have better metallurgy but i guess thats where aftermarket support comes in ...
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Old 06-24-2012, 12:15 PM   #382
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I don't remember seeing it mentioned, but do you offer this for ej20g and ej20k heads? Also, is it detrimental to strength of the combustion chamber, will it weaken the areas around the valve seats or plug holes?
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Old 06-28-2012, 03:54 PM   #383
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I love my hybrid set up, and a question I have is the pertaining to the scavenging ability of the 2.0L heads w/ported block matching the EJ257. The 2.0L cams seem like they won't do an adequate job of scavenging the exhaust gases from the combustion chamber. Leaving a lethal combination for those that start to run bigger turbo set ups. Some use a header set up allow more flow for this. However, I don't know if it's the correct logic, but on top of matching the heads relative B25 combustion chamber, wouldn't a set of cams and a good valve angle job to work in concert with the chamber being opened up be more beneficial for engine health/efficiency and ...well power too?
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Old 06-28-2012, 06:25 PM   #384
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Quote:
Originally Posted by DDScooby View Post
on top of matching the heads relative B25 combustion chamber, wouldn't a set of cams and a good valve angle job to work in concert with the chamber being opened up be more beneficial for engine health/efficiency and ...well power too?
Yes. Yes they would.

I'm running Sti cams in mine for that eaxact reason...they are designed to work with that cylinder head design.
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Old 06-28-2012, 10:04 PM   #385
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I thought so...I think that STi cams or something comparable should be the next project above anything else...if anything for longevity of the engine.

I realize what I asked should be common sense, but I see it overlooked 3 out of every 5 builds that I see. :/
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Old 07-01-2012, 12:37 AM   #386
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Nice write up.
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Old 07-19-2012, 07:16 PM   #387
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Quote:
Originally Posted by CeeMan36 View Post
Thanks for the reply buddy, so basically its only worth doing a hybrid if you already have the 2.0 heads since going out and buying them would pretty much require spending the extra $400 to mimic the 2.5l chamber and thats not including a P&P or any other machine work that may be required... I was kinda hoping the 2.0L would be lighter or have better metallurgy but i guess thats where aftermarket support comes in ...
The main reason is price. If you go with a full EJ257 longblock, you also have to purchase all of the AVCS equipment to go with it. Even if you don't run AVCS, you will need the lines and solenoids to feed oil to the cams. This stuff adds up very quickly in price as opposed to just machining out the 2.0l castings.

-- Ed
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Old 07-19-2012, 07:18 PM   #388
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Quote:
Originally Posted by 2slofouru View Post
I don't remember seeing it mentioned, but do you offer this for ej20g and ej20k heads? Also, is it detrimental to strength of the combustion chamber, will it weaken the areas around the valve seats or plug holes?
I'm not sure about the EJ20G/K heads. I'd need to see pictures of them. If the heads have the standard style hemispherical combustion chamber, we can run the same program on them. If they have the older star shape chamber, however, we can't do much with them.

There is no weakening with this program because we don't touch the area around the spark plug port and the valve seats. Most of the material that is taken off is on the outer edge of the chamber.

Thanks
-- Ed
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Old 07-19-2012, 07:21 PM   #389
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Quote:
Originally Posted by DDScooby View Post
I thought so...I think that STi cams or something comparable should be the next project above anything else...if anything for longevity of the engine.

I realize what I asked should be common sense, but I see it overlooked 3 out of every 5 builds that I see. :/
Cams should always be sized appropriately for the turbo. I've found the stock 2.0l cams to work well up to about 300-330whp on our lower reading dyno. Above that, its a good idea to size up. Otherwise I have not seen any issue with running the factory cams with this chamber modification.

-- Ed
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Old 07-29-2012, 12:55 PM   #390
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Do you guys also do a basic head rebuild with new guides, seals when you do this? I'm looking to ship my ej205 heads to you but the exhaust seals are on their way out.
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Old 07-30-2012, 11:02 AM   #391
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We also offer valve jobs, surfacing, guide replacement, and porting services as well as fully built shortblocks and assembled long blocks. Please call for details and pricing.

Thanks
-- Ed
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Old 09-09-2012, 08:15 AM   #392
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This one needs a bump. They do good work!
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Old 09-11-2012, 05:39 PM   #393
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Quote:
Originally Posted by PSolbergfan View Post
This one needs a bump. They do good work!
Thanks for the bump! We're swamped with head work right now

-- Ed
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Old 09-11-2012, 06:53 PM   #394
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My heads are ready to come home today, yay!!
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Old 09-13-2012, 07:37 PM   #395
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Shipped out another 3 sets of finished heads yesterday

-- Ed
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Old 10-03-2012, 03:08 PM   #396
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can you guys do anything for a pair of EJ207 AVCS heads going on an EJ22T block? i want to open up the combustion chamber on the 207 heads for the 22T bore
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Old 10-04-2012, 05:36 PM   #397
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We can use the same program on the EJ207 heads but it would open the bores up to match the 257. We don't have a program for the 22T.

-- Ed
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Old 10-04-2012, 08:55 PM   #398
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Quote:
Originally Posted by derk View Post
can you guys do anything for a pair of EJ207 AVCS heads going on an EJ22T block? i want to open up the combustion chamber on the 207 heads for the 22T bore

I had this exact thing done to mine when I sent my heads out, but I don't want to advertise for an other vendor in EQ's thread, so I wont say where here. For all I know EQ can do this as well.

all that needs to be done is the side widened a little and then blended back into the chamber, plus a little deshouding behind the valves doesn't hurt. My combustion chamber final size was on 51cc so I didn't loose much in my compression ratio either.
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Old 10-05-2012, 08:27 PM   #399
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Please feel free to tell him where he can get that done as we don't do anything for the 22T bore size.

Thanks
-- Ed
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Old 10-05-2012, 10:03 PM   #400
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I had mine done at ASF Machine, and would recommend them to anyone. Joe is great to work with and really did a beautiful job, I regret not taking pics when I got the heads back from him.
Here is one of the heads after a quick tear down after a few hours of run time. Not shiny new, but I did give em a quick cleaning

http://i177.photobucket.com/albums/w...54858129_n.jpg


you can also get an idea of what needs to be done in Fuji K's I want to build a 2.x engine
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