Accurate Engine Specs?

BAC5.2 · Post by **BAC5.2** » Tue Oct 18, 2005 9:16 pm

Hey guys,

I need the specs for the Phase 1 EJ25, the EJ22T, and the EJ257.

I need everything.

Bore, stroke, crank profile, head volume, and head gasket specs.

Matt Monson showed me one site, but it didn't seem very accurate. The specs they gave, didn't add up.

Do the FSM's have all of these specs?

Thanks!

jake15 · Post by **jake15** » Tue Oct 18, 2005 10:11 pm

while someones at it, i need to know the same specs for a 89-93 liberty ej20g (no RS-R or RS-RA) i mostly need the head volume, but everything would be much appreciated.

and phil... what are you planning?

Matt Monson · Post by **Matt Monson** » Wed Oct 19, 2005 12:04 am

Jake,
57cc

napphappy · Post by **napphappy** » Wed Oct 19, 2005 12:16 am

I can email the FSM specs for the phase I and the 257.

jake15 · Post by **jake15** » Wed Oct 19, 2005 1:12 am

Matt Monson wrote:Jake,
57cc

really? i've just spent a couple hours searching the liberty boards and i've come up with 49cc for the DOHC ej20 which ones right? i used to have this really cool web page with all the info on it bookmarked but the link goes to a "website not found" page now.

BAC5.2 · Post by **BAC5.2** » Wed Oct 19, 2005 1:25 am

Matt - can you verify that the site you gave me was correct?

The piston displacement, calculated by the figures they give, exceed their and Subaru's listed displacement for the Legacy. PD = 2270, Total Displacement = 2217 (or something like that).

I want to get all of the specs together so I can map things out for the machinist.

BAC5.2 · Post by **BAC5.2** » Wed Oct 19, 2005 1:27 am

Jake - Was it the ravensblade site? He is moving it.

Naphappy - Yea, if you could shoot those over to me, that'd be awesome. BAC5point2 (at) gmail (dot) com

Matt Monson · Post by **Matt Monson** » Wed Oct 19, 2005 5:17 pm

BAC,
There are some mistakes on the EjCalcs site. I don't remember what they are though. Why don't you post up the specific numbers you are working with, and we can check them for you.

Jake,
57cc comes from a guy on NASIOC, who measured them. I do believe the early WRX Ej20G's were 49cc, but the Legacy versions have more volume. If you look at a set of heads, it is visually obvious that they are much bigger...

LaureltheQueen · Post by **LaureltheQueen** » Wed Oct 19, 2005 7:24 pm

That'll fuck with our compression.

hackish · Post by **hackish** » Wed Oct 19, 2005 7:54 pm

I just thought of something... Maybe I could CC my head with a needle. 1/2 CC at a time (insulin siringes). That ought to be accurate. Off to the drugstore to buy some vasoline and a siringe

-Michael

legacy92ej22t · Post by **legacy92ej22t** » Wed Oct 19, 2005 8:22 pm

hackish wrote:Off to the drugstore to buy some vasoline and a siringe

Hehehehe, sounds like you're going to have an interesting night!

Matt Monson · Post by **Matt Monson** » Thu Oct 20, 2005 12:17 am

hackish wrote:I just thought of something... Maybe I could CC my head with a needle. 1/2 CC at a time (insulin siringes). That ought to be accurate. Off to the drugstore to buy some vasoline and a siringe

-Michael

Do you really want to advertise how small your member is?

Laurel,
IIRC, when I ran the numbers for Ej22T block with Ej20G Legacy/Liberty heads it was like 6.7:1 or so...

Matt Monson · Post by **Matt Monson** » Thu Oct 20, 2005 12:19 am

Oh, and I know a guy who swears by using salad oil to CC heads...

BAC5.2 · Post by **BAC5.2** » Thu Oct 20, 2005 2:26 am

Most people use motor oil to CC heads.

We CC'd the head from a 3.4L GM motor at school. We just used water, but it was pretty dead balls on.

BAC5.2 · Post by **BAC5.2** » Thu Oct 20, 2005 3:01 am

Matt - I just need the internal specs of the three engines so I can see what I need to mix-and-match to get what I want.

And did you say the EJ22T block could go .05cm over before sleeving? How certain of that are you? How much will it weaken the block to go .05cm over?

I also need specific crank specs. I.E. Journal spacing and everything. They SHOULD be the same, but I'm not positive.

azn2nr · Post by **azn2nr** » Thu Oct 20, 2005 7:12 am

Matt Monson wrote:
hackish wrote:I just thought of something... Maybe I could CC my head with a needle. 1/2 CC at a time (insulin siringes). That ought to be accurate. Off to the drugstore to buy some vasoline and a siringe

-Michael
Do you really want to advertise how small your member is?

Laurel,
IIRC, when I ran the numbers for Ej22T block with Ej20G Legacy/Liberty heads it was like 6.7:1 or so...

um i think i need thoes heads. 30 psi would be simple on that type of compression

BAC5.2 · Post by **BAC5.2** » Thu Oct 20, 2005 8:12 am

Why? More boost doesn't always mean more power.....

You could make similar power with 9:1 compression and 14psi.... AND you'd have better low end. The downside is you need to tune it very well or else.

Tleg93 · Post by **Tleg93** » Thu Oct 20, 2005 12:38 pm

We CC'd the head

Ok, I'm a sparkie, what is this? Does it mean to bore the heads with a machine??

legacy92ej22t · Post by **legacy92ej22t** » Thu Oct 20, 2005 1:12 pm

No, it's to find out the volume of the heads. CC=Cubic Centimeters

Tleg93 · Post by **Tleg93** » Thu Oct 20, 2005 7:21 pm

Oh, cubic centimeters!? The way it was being discussed it sounded like a verb.

BAC5.2 · Post by **BAC5.2** » Thu Oct 20, 2005 7:37 pm

When you measure the volume of a cylinder head, its referred to as "CC'ing the head"

Tleg93 · Post by **Tleg93** » Thu Oct 20, 2005 7:50 pm

Yep, I realized that now. Thanks.

azn2nr · Post by **azn2nr** » Thu Oct 20, 2005 11:43 pm

BAC5.2 wrote:Why? More boost doesn't always mean more power.....

You could make similar power with 9:1 compression and 14psi.... AND you'd have better low end. The downside is you need to tune it very well or else.

i know i know, its just cool to see a boost gauge swing up like that.

BAC5.2 · Post by **BAC5.2** » Tue Oct 25, 2005 7:34 pm

Bump...

I still need some accurate engine specs!

I would like to get going on planning the long and difficult process of building a monster.

dzx · Post by **dzx** » Tue Oct 25, 2005 10:35 pm

wouldnt 30 psi on a 6.7:1 compression ratio take a long long time to spool up?

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Accurate Engine Specs?

Accurate Engine Specs?