Originally posted by XT6Wagon
Well My EA-82T did 15+ psi non-intercooled on 87 octane in 100+ degree temps all day long no questions asked.
Really relaiblity is all about keeping detonation away and living through a couple minor det events.
The EJ22T or the EJ257 will do that.
The simple fact is the world has moved on since the EJ22T was made. The improvments in the current blocks are not poke you in the eye obvious, but they add up to one heck of a sweet block.
Oh and on the 9K bit? Last time I did some calculations on it IIRC the EJ25's stroke and rod lenght means that it sees approx the same stress as a Teg Type-R does at 8K. So my guess is that if you really wanted to a stock STi Type-US motor could take 9K on the bottom end. But you still would have to get some stiffer valve springs to make that end relaible.... and I wouldn't do it anyway unless i had a nice reserch motor to play with. 8K will be fine for me once the ECU is cracked.
The rods in the 257 are not as strong as the rods in the 22 or the type r and I dont think they will handle 30psi before pandcaking nor are they as blanced as the type r. Both motors were made to have a higher redline then the 257. And its also more a reinforced deck, easyer to keep cool, where as the 22 is a semi closed... a fully closed would be a PIA and have an imposible time cooling it down.
I agree that its a nice step away from the older phase one blocks and in the end its all about what you like. Im just more of a 2.2 guy.
O one more thing the ej22 and some older blocks were low pressure casts which mean less air in the metal. Newer blocks are high presser casts which are cheeper to make and easy to cool.