High compression Engine Build, Dyno'd

[Grafton]

the NA board needs a build log, so here it is!

Goal: 200+ crank HP, all motor

the ingredients:
95' EJ22e dual port heads
01' EJ251 short block

the minor goodies/mods:
Delta 200 cams
solid lash adjusters
STi Oil pump
Grimm-speed 8mm manifold spacers
Port and polish done by me
EL OBX headers
FPR tuning * if needed *
MSD Coil

quick stats:
12:1 compression 2.5L
stock ej22 ecu

about the "omg ej22 heads don't flow"

According to Cobb's bench flow numbers the EJ22T heads from 193 cfm@0.350" lift on the intake side and 147 cfm@0.350" on the exhaust side
http://www.cobbtuning.com/tech/sohc/page2.html
According to MRT's numbers the EJ205 heads flow 151 cfm@0.400" lift on the intake side and 111 cfm@.0400" lift on the exhaust side.
http://www.mrtrally.com.au/performance/ click the hot link on the bottom of the page for head flow characteristics.
Of course the EJ25 heads win with 240cfm and 182cfm respectively. But I get tired of people constantly say that you MUST upgrade the EJ22 heads when doind a build because the flow like s*%&! That just isn't true. They flow all right, especially for the turbo guys...

now for the opening pictures



EJ251 shortblock








Crankshaft


Stock head, drivers side ( to be ported )








Pistons, in need of cleaning








Ported head (passenger side)






[img]http://img693.imageshack.us/img693/160/dscn0862ew.th.jpg[/img]

[mike-tracy]

That's very cool, but do you have engine management in your future? Fuel injectors & pump?

[Airgne]

i will tell you that you do not want straight 2000grinds. go with 2000/1000/ grind cams. n/a engines need some back pressure.

[Grafton]

That's very cool, but do you have engine management in your future? Fuel injectors & pump?

nothing but a modified stock fuel pressure regulator atm, to up the psi on the rails therefore flowing more and changing the open loop afr closed loop should adjust itself
I'd like a pp6 to really tune it... in the future

i will tell you that you do not want straight 2000grinds. go with 2000/1000/ grind cams. n/a engines need some back pressure.

there are only 2 grinds for the phase 1 ej22 cam 220 (torque, aka 1000) or the 230 (hp, aka 2000)

and i'm very sure about the cam choice, with the 220's I'd get off idle power up to ~5k rpms and it'd fall off like stock, thats not what I'm after

with the 230's I wont start making real power till 1800-2200 rpm but it'll keep making power till redline. I need the large overlap to bleed off cylindar pressure at low rpm's and because of the high static compresson I'll start making power sooner rather than later. and i don't normally drive under 2k rpms anyway
plus I should have a loopy idle, sexy!

[Airgne]

talk to ken at delta cams.

also call dom at maxwell power and talk to him about your build. he is one of the few that i would trust with my car.

[datdookie]

OH WHA! Finally a high compression thread. Hoping to see how this all turns out because im going the same route except im going with the 25d motor instead of the 251 because of re-wiring. What pistons/rods are you using?

[ouch1011]

If you cut the loop off the passenger side exhaust, all you'll have is a UEL header. There is no compromise, its either equal length or it isn't. About the only benefit you'll get is from the longer primary tubes, but you'd get more power from just leaving it alone.

Otherwise, good luck with your build.

[subie/legacy]

what head gasket do you plan on using? and isn't there some controversy about water passages not matching up on either gasket to heads, or gasket to block?
I like what your doing here, and might wan't to do this myself one day.

[httrdd]

What is your expected completion time? I would like to see this motor in action.

[Grafton]

talk to ken at delta cams.

also call dom at maxwell power and talk to him about your build. he is one of the few that i would trust with my car.

Talked to Ken, I'll shoot an email to dom thanks for the tip

OH WHA! Finally a high compression thread. Hoping to see how this all turns out because im going the same route except im going with the 25d motor instead of the 251 because of re-wiring. What pistons/rods are you using?

if your using your ej22 heads and manifold it doesn't matter about the 25d or 251 no re wiring necessary, stock pistons & rods just with new rings and bearings

If you cut the loop off the passenger side exhaust, all you'll have is a UEL header. There is no compromise, its either equal length or it isn't. About the only benefit you'll get is from the longer primary tubes, but you'd get more power from just leaving it alone.

Otherwise, good luck with your build.

thanks, very true it will be completely UEL but it's going to be a close ratio and *shouldn't* collide the pulses like a brola so it should make more power than a replica style UEL, I have that same design on my 2.2 right now and it makes a LOT of torque (other than my pulley only power mod is headers) but that might be due to the nice long primaries

what head gasket do you plan on using? and isn't there some controversy about water passages not matching up on either gasket to heads, or gasket to block?
I like what your doing here, and might wan't to do this myself one day.

I'm using the cometic hybrid design H1631SPK040S, http://www.sl-i.net/FORUM/viewtopic.php?f=5&t=14956 just ordering it thinner than normal

What is your expected completion time? I would like to see this motor in action.

End of September, depending on part deliveries and machine shop time, I *hope* to have everything ordered by the end of the week along with finishing the porting job

[Airgne]

why are you goin to use stock pistons and rods?

why not some cp pistions and pauter rods to be safe?

[Grafton]

why are you goin to use stock pistons and rods?

why not some cp pistions and pauter rods to be safe?

limited budget, the stock components seem to hold up fine in other high compression hybrids we'll see about this one though.This is technically a "rebuild" honestly there will be more money in the seals & gaskets than anything else ~400
I'll post my projected budget after classes today

[Airgne]

Subaru Impreza, Legacy, Outback Sport, Baja, Forester, 16V DOHC H4 F.Inj. 99-07 (see kit #'s for specific years)
Engine
Code Stock
Bore Includes: Kit #/Price
EJ25 99.5mm Complete Gasket Set
MLS Head Gasket
ROSS/Wiseco Pistons
(99.5mm, 100mm, 101mm) and
(8.5-1, 9.0-1, 9.5-1, 10.0-1, 10.5-1 comp ratio)
Performance Rings
Performance Wrist Pins
TOGA HP Main Bearings
TOGA HP Rod Bearings
Timing Belt

Additional Parts Available:
K1 / Carrillo Rods Impreza, Legacy, Outback Sport, Baja 99-03
Forester 99-00
EKSSU11LMPX
$1099

Impreza, Legacy, Outback Sport, Baja 04-07 (gasoline)
EKSSU11SLMPX
$1099

Impreza, Legacy, Outback Sport, Baja 04-07 (TURBO)
EKSSU15MPX
$1099


Call to Order:
(603) 378-0090

[subie/legacy]

I'm using the cometic hybrid design H1631SPK040S, viewtopic.php?f=5&t=14956 just ordering it thinner than normal

Ok thanks. I was reading up on these frankenbuilds not to long ago, and guess i my have over looked that they made such a gasket.

[Reason]

Cometic makes a gasket for this hybrid, I plan on doing a build very similar to this one.

[Grafton]

budget breakdown:
Gaskets:
ej25 lower set $25
ej22 upper set $40

mechanical:
timing belt kit (idlers, water pump, & belt) $105
NPR piston rings $50
ACL Race main bearings $70
ACL Race rod bearings $55
Valve springs, retainers,& collete's $100
Cam regrinds $200
MSD Coil $70
Manifold spacers $90

machine shop labor $100

already acquired a few months ago:

95' ej22 long block $80, just needed the heads from it
01' ej251 short block $120 was pre-dissembled for me
OBX EL headers $150 used on ebay
sti Oil pump, $40 barely used from a friend
new oil pan, pick up and head bolts $140 dealership

pictures of some more stuff
Oil pick up, stock


STi 10mm oil pump


head bolts and drivers side head plug


new oil pan

[ouch1011]

This is cool, NA builds are fun as long as you are realistic in your goals (which it looks like you are). As long as you don't go (too far) over the stock redline, the stock bottom end should have no problem with your goals. If you go past the stock redline, with those aggressive cams and SOHC rocker arms (heavy) the valvetrain will probably become the weak link. You'll just have to be careful at low RPMs to make sure not to lug the engine. Probably won't be an issue with the aggressive cam grind, but high compression at low RPM can result in pounding the crap out of the rod and main bearings, even if there is no detonation. It can also build a lot of heat in the pistons--most high compression engines use forged pistons.

[Grafton]

^ thanks, I've run into a small problem, the crankshaft i was going to use acquired some scratches in it that i had not noticed what i bought it. when i took it to the machine shop and they pointed them out i felt it was time to find another crankshaft, I've got a line on a balanced sti crank, if i can get the price right i'll get it.

[Grafton]

yay double post!

dirty intake valve:


and through a magic process volia clean:


first parts in the mail, grimmspeed spacers,


cams are on the way to delta, engine block is at the machine shop, heads will go when i have the parts to build them

[JunkerXL]

cant wait. i was pondering doing this with my 25 block.

[Reason]

OoooOoO more pics

[datdookie]

god damn man im loving this thread more and more cant wait till i get my money up. My motor is waiting on me... oh and are those valve springs and retainers upgraded or just brand new stock/oem because im trying to raise my rpm to 7000 or 7500

[Grafton]

god damn man im loving this thread more and more cant wait till i get my money up. My motor is waiting on me... oh and are those valve springs and retainers upgraded or just brand new stock/oem because im trying to raise my rpm to 7000 or 7500

I'm glad, the major parts for this build have been sitting in my computer room since march, I didn't have or the money (no job) to get started, but i am employed again so huryay money!

I'm sticking with the stock redline and stock springs, i never ran across anyone selling upgraded springs, if anybody has them delta might know where to get them. but the rumor is that the stock valve train is good till 6600-6700 i think, but lacking a tunable ecu i'm stuck with 6250 dun dun duuuhhhhh. :/

well now it's time to make a 4.5 hr drive to pick up a Cobb balanced crankshaft in pa

[httrdd]

Looks good! Keep on truckin buddy!

[Airgne]

you will be able to get 200 crank out of it. i got around 210 crank with cams, intake, exhaust, and slight tune.

[Reason]

Pssh, I want 200 at the wheels

[Grafton]

Might need new pistons, according to the machine shop the bore clearance is .004" that's double the limit but I am going to check myself incase they forgot to do the math (bore-piston)/2= clearance

In good news I made friends with the ups guy today and he dropped of some parts

oil filter spacer and temp sender fron glowshift, they're sending me a din mount for my gauges bc my gauges didn't fit in the a piller mount


nice clean pistons that are pretty worn


piston pins


Clean rods


new valve springs, retainers & lock clips


timing belt & idlers


new water pump




Tribecca front swaybar


EJ25 lower gasket set


valve cover gaskets


cometic head gaskets


ej22 upper gasket set

[Reason]

Exciting!

[JunkerXL]

mmmmmmmmmm cant wait for the next episode all those parts going in, math, pistons, it's like an action movie for car nerds, in slo-mo

[StatGSR]

it's like an action movie for car nerds, in slo-mo

I think that made my day!