'96 Heads

evolutionmovement · Post by **evolutionmovement** » Sun Mar 20, 2005 5:19 pm

OK, so the '96 heads have the roller rockers, but what else accounts for the stated HP increase over the earlier EJ22s? Is it cam profiling and/or bigger valves? And most importantly, are these heads dual port heads?

Steve

vrg3 · Post by **vrg3** » Sun Mar 20, 2005 5:42 pm

I thought it was the 97 engine that made more power, and that it was primarily due to slightly higher compression...

Post by **Legacy777** » Sun Mar 20, 2005 6:23 pm

The 96 ej22 heads are roller rocker, and have larger valves. They are not however dual port exhaust ports.

entirelyturbo · Post by **entirelyturbo** » Sun Mar 20, 2005 8:17 pm

Are you sure about the 96 EJ22 having roller rockers? I have an EndWrench magazine that says the 97-up EJ22's were Phase II, which included these changes: roller rockers, a bump in CR from 9.5:1 to 9.7:1, and thus becoming an interference engine...

evolutionmovement · Post by **evolutionmovement** » Sun Mar 20, 2005 9:20 pm

I read here someplace that the '96s were roller rocker. So do the 97 up have the larger valves along with dual ports?

Steve

Post by **Legacy777** » Mon Mar 21, 2005 12:22 am

no, none of the ej22's from 95 onward have dual exhaust ports.

evolutionmovement · Post by **evolutionmovement** » Mon Mar 21, 2005 12:59 am

So that's why everyone goes to the 2.5s, then.

Steve

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'96 Heads

'96 Heads