We now know that the 2.0l DOHC heads on our 2.2l engine (8:1 stock CR) will have a ~7.5:1 CR..
With all the parts left over by my frankeinstein project... I may rebuild an engine with a wrx 2.0l shortblock + ej22T SOHC heads.
My question .. if the Dohc heads on 2.2T block is a .5 Cr drop, is the opposite (sohc heads on 2.0T block) will be a .5 CR increase ? or maybe more ? with a thin gasket, could it get a 9:1 or 9.5:1 CR ?
thanx !
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morgie
'98 4Runner V6 Manual 4x4.
'98 4Runner V6 Manual 4x4.
Where did 7.5CR come from though? Thats not what I have seen...
EJ22 combo
bore 96.9
stroke 75mm
head chamber 49cc
piston volume 28cc
gasket thickness 1.52mm
calculated 7.27:1 CR
But the 2.2 turbo heads are the worst flowing option available, why do you want those? Plus the hydrolic lash adjusters become a problem at higher boost if they are worn.
You'd end up with a partially closed deck block, smaller bore and old heads! The only benefit I could see is that it would be easy to use a 2.2t manifold and associated electronics.
Ej20 with ej22t heads and 1.52 gasket = 8.43 compression ratio using these specs:
92mm bore
75mm stroke
40cc head
17cc dish piston
1.52mm gasket
EJ22 combo
bore 96.9
stroke 75mm
head chamber 49cc
piston volume 28cc
gasket thickness 1.52mm
calculated 7.27:1 CR
But the 2.2 turbo heads are the worst flowing option available, why do you want those? Plus the hydrolic lash adjusters become a problem at higher boost if they are worn.
You'd end up with a partially closed deck block, smaller bore and old heads! The only benefit I could see is that it would be easy to use a 2.2t manifold and associated electronics.
Ej20 with ej22t heads and 1.52 gasket = 8.43 compression ratio using these specs:
92mm bore
75mm stroke
40cc head
17cc dish piston
1.52mm gasket
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Oki, i was just curious...
7.5:1 comes from ejcalcs website.. was the first thing i remembered
I have 1 EJ22T engine, 1 EJ20T engine, 1 EJ20T shortblock, 1 EJ22 NA engine.
I take the ej22T shortblock + ej20T dohc heads for my main project. But i'll have plently of parts to build another engine with a ej20T shortblock + the ej22T heads, and maybe this way recover some money instead of letting all those parts catch dust in my shed (cabanon)
7.5:1 comes from ejcalcs website.. was the first thing i remembered
I have 1 EJ22T engine, 1 EJ20T engine, 1 EJ20T shortblock, 1 EJ22 NA engine.
I take the ej22T shortblock + ej20T dohc heads for my main project. But i'll have plently of parts to build another engine with a ej20T shortblock + the ej22T heads, and maybe this way recover some money instead of letting all those parts catch dust in my shed (cabanon)
morgie
'98 4Runner V6 Manual 4x4.
'98 4Runner V6 Manual 4x4.
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I think i've found why !
on EJCalcs, they uses the 2.5l DOHC heads in their calculs, wich has 46cc of head volume, a bit less than the 2.0l DOHC heads, wich are 49cc head volume.
That may explain why you get a lower CR.
7.21:1 on 49cc
7.40:1 on 46cc
That makes sense ?
on EJCalcs, they uses the 2.5l DOHC heads in their calculs, wich has 46cc of head volume, a bit less than the 2.0l DOHC heads, wich are 49cc head volume.
That may explain why you get a lower CR.
7.21:1 on 49cc
7.40:1 on 46cc
That makes sense ?
morgie
'98 4Runner V6 Manual 4x4.
'98 4Runner V6 Manual 4x4.
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simply by cr.....putting EJ22 or EJ22T heads on an EJ25 and most likely EJ20T block will increase CR.
Josh
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm
surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT
If you need to get a hold of me please email me rather then pm