Basic Engine Information

[Impregacy]

Nic elittle EJ22 pdf with color pictures:
http://www.mygyroplane.com/overhaulej22.pdf


EJ22t

Bore: 96.90mm
Stroke: 75.0mm
Rod length:131.25mm?
rod stroke ratio:1.75
Piston dish volume:28.0cc
deck height:
head chamber volume:
gasket thickness:
Static CR:8.0:1
Dynamic CR:
Compresion height:
port volumes:?

CAMS





EJ257

Bore: 99.50mm
Stroke:79.00mm
Rod length:130.43mm
deck height: 201.0mm
head chamber volume:57.0cc
gasket thickness:.6mm
static CR:8.09:1

CAMS
Intake valve timing
Opening Max. retard 5° ATDC
Max. advance 15° BTDC
Closing Max. retard 65° ABDC
Max. advance 45° ABDC

Exhaust valve timing
Opening 55° BBDC
Closing 5° ATDC

Cam lobe height mm (in)
Intake STD 46.55 — 46.65 (1.833 — 1.837)
Limit 46.45(1.829)
Exhaust STD 46.75 — 46.85 (1.841 — 1.844)
Limit 46.65(1.837)

EJ20t 2002 wrx specs
bore: 92.0mm
stroke: 75.0mm
rod length: 130.43mm?
rod stroke ratio:
deck height:
camber volume: 51.5cc
static CR: 8.0:1
dynamic CR:
Gasket: .6mm

CAMS
intake open:10 BTDC
intake close:50 ABDC
exhaust open:53 BTDC
exhaust close:7 ABDC
lobe height intake: 46.30+/- .05mm
lobe height exhuast: 46.20 +/- .05mm


EJ18tttt
1,000 hp i think i read somewhere

[Legacy777]

http://bbs.legacycentral.org/viewtopic. ... ne+spec%2A

[Impregacy]

hmmm yeah i saw that one -there isn't a whole lot of objective information in that thread. There's a lot of jibberjabber about specs in that thread, but no specs. except for the one spec about the ej20tt head volume, but then two people had conflicting data. then there was some other volume spec but they didn't say which engine they were talking about. so... i ignored that one. part of the reason i wanted to start this one in fact is that it's nice to have all of the data be in condensed form (not spread among 10 pages) and it's nice to have credible accurate data. So everyone can be happy and less confused and crap like that and find things fast. So i guess if i can i will try to compile everything in my first post of this thread. i could use some help though because i only have a FSM for the ej18 engine and nobody cares about that engine. well i used to care until the ej22t came into my life. now i check the going rates for cast aluminum regularly to see how much $ i can get per pound of ej18-harharharhar

[206er]

not sure if you have seen this, but it has some info.
http://wac.addr.com/auto/obs/turbo/ejcalcs.html

[napphappy]

EJ257

Intake valve timing
Opening Max. retard 5° ATDC
Max. advance 15° BTDC
Closing Max. retard 65° ABDC
Max. advance 45° ABDC

Exhaust valve timing
Opening 55° BBDC
Closing 5° ATDC

Cam lobe height mm (in)
Intake STD 46.55 — 46.65 (1.833 — 1.837)
Limit 46.45(1.829)
Exhaust STD 46.75 — 46.85 (1.841 — 1.844)
Limit 46.65(1.837)

This is DATA

[Matt Monson]

The reason you see conflicting information on the head volume of the Ej20's is because we were talking about 2 different engines. The head volume on the EJ20 has changed 3-4 times since it was introduced in 1989. After all, we are talking about 15 years of production and probably a dozen distinct variations of the motor as used in both Legacies and Imprezas.

[BAC5.2]

not sure if you have seen this, but it has some info.
http://wac.addr.com/auto/obs/turbo/ejcalcs.html

Those numbers aren't accurate. If you add it all up by the math, you don't arrive at the numbers they produce.

That's why I started my other thread.