My search terms were a little too specific to bring up what I was after.

 

I'm getting nearer to building my frankenmotor, and although I built a super sweet single port UEL, I'd prefer the option of running a dual port head.

 

Am I able to bolt my SLA/roller rocker assembly onto a dual port head, or are the valves designed differently?

From what I understand, it will bolt right in. The Valves are the same. MilesFox had this idea a few months ago.

yes, i had this idea to use roller rockers from 97 single port heads on dual port 1st gen heads, which allows for a delta 1000 cam

yes, i had this idea to use roller rockers from 97 single port heads on dual port 1st gen heads, which allows for a delta 1000 cam

 

So it's a direct bolt in then? I do want to run the 1000 cam as well as the dual port for ease of exhaust choices on the frankenmotor.

Yes it's a direct bolt-in. I have done it. You need to send Delta the 96+ cams for grinding the 1000 cam's though - the RR cams are made from stronger material and have to be finished differently. They can't use the 90 to 95 cams for that grind - has to be one of the RR variants (96 was RR and HLA while '97/'98 was RR and SLA).

 

GD

What would '99 be? SLA and RR I presume? Or did they go back to Hydro Lifters? As I would be getting onto a '99 SOHC EJ22, so this could be an upgrade option for the '93 EJ22 which is in the car.

'99 is a phase-II engine and is competely incompatible. The heads on the phase-II are basically EJ251 heads.

 

GD

'99 is a phase-II engine and is competely incompatible. The heads on the phase-II are basically EJ251 heads.

 

GD

 

I thought they started Phase-II in '97? Big flat valve covers with spark plug in the center. Maybe that was the start in '99 (Been a long day)

Phase-II started in 99 with the EJ223 in the base legacy and outback sport, and the EJ253 in the Forester and 2.5RS. The legacy Outback, and legacy GT retained the phase-I EJ25D till '00.

 

GD

Edited February 15, 201214 yr by GeneralDisorder

what he said. the 99+ EJ22 is the Phase II - much different than 98 and earlier stuff. the 99+ are hard to find so it's a good motor to snag if you can find one and have on hand. i'm swapping two 99 EJ22's right now. one lost a belt, bent valves, another ran out of oil.

Good to know, thanks!

Since GD enumerates an EJ222 as a phase II, base Legacy and Outback Sport, my “tailgating” question to this thread is what are the characteristics of EJ223 as I found on my recent 99 Impreza Outback Sport Wgn, manual , (from the ID build plate)? Will this be roller rocker & SLA? Had a variable clatter coming from drivers valve cover, can’t wait to see what it is…Thx

They can't use the 90 to 95 cams for that grind - has to be one of the RR variants (96 was RR and HLA while '97/'98 was RR and SLA).

I'm pretty sure the RR with HLA started in 95 because three of the 95's that I've had the valve covers off of had them.

Since GD enumerates an EJ222 as a phase II, base Legacy and Outback Sport, my “tailgating” question to this thread is what are the characteristics of EJ223 as I found on my recent 99 Impreza Outback Sport Wgn, manual , (from the ID build plate)? Will this be roller rocker & SLA? Had a variable clatter coming from drivers valve cover, can’t wait to see what it is…Thx

 

EJ223 is what I meant to say - sorry for the typo. All phase-II engines are RR and SLA.

 

The tendancy with all the phase-II engines is for the valves to get tighter not looser.... so not sure what your clatter is. Could be piston slap.

 

GD

Edited February 15, 201214 yr by GeneralDisorder

I'm pretty sure the RR with HLA started in 95 because three of the 95's that I've had the valve covers off of had them.

 

I have one in the garage right now with 137k on it about to drop into a Forester. I'll take a look and maybe a picture. Definitely a '95 - OBD-II and dual port heads.....

 

GD

I should have taken pictures when I had the covers off my '95. As I an not 100% sure what RR setup looks like.

This is a 97 or 98 (honestly don't know.. seller didn't either).

But it's RR and SLA.

 

Ah yes, the Manual Adjustable rods are a dead give away. Now I forgot what my '95 had. Thought I remembered seeing adjusting nuts.

Took a look at that '95 in my garage and it was indeed RR and HLA.

 

GD

Ah yes, the Manual Adjustable rods are a dead give away. Now I forgot what my '95 had. Thought I remembered seeing adjusting nuts.

 

Doubt the 95 has SLAs because my 96 had HLAs. They didn't like really cold weather.

 

I know that engine I have a pic of up there is def a 97 or 98 because of the PCV and canister routing.

Here's what a 95 RR HLA head looks like:

are the older say 90-93 cam the same as far as the lode size and shape as a roller rocker cam, the reason I ask is I have a set of delta low torque cams Im putting in a engine that looks like this, the only difference I saw was the RR cams have a couple narrrower lodes

 

 

RR cams are harder. Profile isn't the issue - it's a wear issue as I understand it. Being a regrind.... I would ask Delta about the interchangeability of them from a metalurgical standpoint. Don't want them going flat in short order or something.

 

GD

Definitely get the roller rocker cams from Delta. They sent me a set of flat tappet cams, and when I called to ask about the differences between those and the ones in my engine they told me the grind profile is slightly different between roller cams and the flat tappet style cam that came on the 90-94 and early 95 heads.

 

The cams will fit in the heads just the same, but you can only use them if you swap in the older flat tappet rockers. It will damage the cams and rockers if you try to mix styles.