Cam options for 25D heads

Heads, valves, pistons, rods, crankshaft, etc...

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BiNiaRiS
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Cam options for 25D heads

Post by BiNiaRiS » Mon Nov 13, 2017 7:39 pm

So my hybrid build will be coming out soon, and figured I should look at cam options while there's easy access.

What options are there out their for cams? I know EJ20k cams fit, but they aren't too easy to track down. Tomei? Anyone else make them?

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Re: Cam options for 25D heads

Post by mike-tracy » Mon Nov 13, 2017 11:26 pm

Delta has or had a couple different options for ej25d/20k/20r/any other head in that family.

I've driven a couple cars with stock ej25d cams, and they were quite impressive. Tremendous torque and decent top end.
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Re: Cam options for 25D heads

Post by Mister Anderson » Wed Nov 15, 2017 5:07 am

I'm running Kelford 272's in my EJ25D heads. That was the only company I could find at the time that made cams for EJ20K/25D heads. I don't know if they still make them though. I thought I read something that Kelford was going to stop producing them.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Thu Nov 16, 2017 11:16 pm

Mister Anderson wrote:I'm running Kelford 272's in my EJ25D heads. That was the only company I could find at the time that made cams for EJ20K/25D heads. I don't know if they still make them though. I thought I read something that Kelford was going to stop producing them.
How long ago was that? Their site has nothing listed.

I'm thinking my best bet is to just source some 20k cams at this point.

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Re: Cam options for 25D heads

Post by dankberries » Fri Nov 17, 2017 3:41 am

Tomei, JUN, Roger Clark Motorsports, TechWorks, and Kelford have or had offered off the shelf Cam's for the JDM ver.4 STi ej20k/USDM ej25d.

Or alternatively, Delta Cam's, Web Cam's, and Kelford offer regrinding services.

Finding OEM JDM ej20k Cam's is a great option, one of, if not the hottest cam that came in a production Subaru, though they very difficult to find.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Fri Nov 17, 2017 3:57 am

dankberries wrote:Tomei, JUN, Roger Clark Motorsports, TechWorks, and Kelford have or had offered off the shelf Cam's for the JDM ver.4 STi ej20k/USDM ej25d.

Or alternatively, Delta Cam's, Web Cam's, and Kelford offer regrinding services.

Finding OEM JDM ej20k Cam's is a great option, one of, if not the hottest cam that came in a production Subaru, though they very difficult to find.
My mechanic suggest Tomei, as he thought they made them for the 20k, but I don't see it listed on their site anymore. Looks like Kelford is the same, but it looks like they are still available as a regrind from Web.

JUN, RCM, and TechWorks, i'll have to look into. This is exactly the info I was looking for that is harder to come by these days.

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Re: Cam options for 25D heads

Post by mike-tracy » Fri Nov 17, 2017 6:49 am

Unless you have a hard on for aftermarket, Ej20R cams are the same as ej20k.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Fri Nov 17, 2017 6:51 am

mike-tracy wrote:Unless you have a hard on for aftermarket, Ej20R cams are the same as ej20k.
Not that I don't believe you but do you have any info to back that up? I know the 25D heads are very similar if not the same as 20R heads so I wouldn't be surprised.

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Re: Cam options for 25D heads

Post by mike-tracy » Fri Nov 17, 2017 7:40 am

Same cam part numbers as STI, though it got the wrx valvetrain.
https://forums.nasioc.com/forums/showth ... ?t=2168230

Marnix breaks it down with specs:
https://forums.nasioc.com/forums/showpo ... ostcount=5


Translation of a translation, but offers general specs:
https://web.archive.org/web/20141207170 ... t/ej2o.htm
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Re: Cam options for 25D heads

Post by mike-tracy » Fri Nov 17, 2017 7:50 am

I'd wager you could find ej20r heads for cheaper than just ej20k sti cams. If you could find anyone willing to sell ;)
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Re: Cam options for 25D heads

Post by monkeyposeur » Sat Nov 18, 2017 2:17 am

This is good info! I am thinking 25D or 20G heads are in my future. I can find 25D heads all the time at the junkyard so if I can just get the cams reground by WEB that would be pretty cool. Also good to know the stock 25D cams are pretty impressive.

I've read through some 25D conversion threads but if anyone knows of a super complete thread I'd love a link or two.

Are the 96 25D heads what I should be looking for?
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Re: Cam options for 25D heads

Post by dankberries » Sat Nov 18, 2017 3:22 am

monkeyposeur wrote:
I've read through some 25D conversion threads but if anyone knows of a super complete thread I'd love a link or two.

Are the 96 25D heads what I should be looking for?

This is the most comprehensive thread you will find in regards to phase 1 DOHC info on this forum,
most other info is scattered from thread to thread. DOHC thread

Have a complete read through that thread if you have not so far.
The 96' heads are different in multiple ways from the 97-98' ultimately it boils down to the preference you want, but you will want to be clear on the differences of the heads and what they yield paired with your short block.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Sat Nov 18, 2017 3:41 am

dankberries wrote:
monkeyposeur wrote:
I've read through some 25D conversion threads but if anyone knows of a super complete thread I'd love a link or two.

Are the 96 25D heads what I should be looking for?

This is the most comprehensive thread you will find in regards to phase 1 DOHC info on this forum,
most other info is scattered from thread to thread. DOHC thread

Have a complete read through that thread if you have not so far.
The 96' heads are different in multiple ways from the 97-98' ultimately it boils down to the preference you want, but you will want to be clear on the differences of the heads and what they yield paired with your short block.
Oh man, i got some reading to do. Don't know how I never saw that thread...amazing that the photo links aren't broken. I should probably get in the habit of downloading stuff like this in case it ever dies.

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Re: Cam options for 25D heads

Post by bmxpunk » Sat Nov 18, 2017 5:03 am

A company called Cat Cams has some. I’ve been looking at their Rally profile for years.
http://www.catcams.com/engines/camshaft-setup.aspx#
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Re: Cam options for 25D heads

Post by Mister Anderson » Mon Nov 20, 2017 3:35 am

BiNiaRiS wrote:
Mister Anderson wrote:I'm running Kelford 272's in my EJ25D heads. That was the only company I could find at the time that made cams for EJ20K/25D heads. I don't know if they still make them though. I thought I read something that Kelford was going to stop producing them.
How long ago was that? Their site has nothing listed.

I'm thinking my best bet is to just source some 20k cams at this point.
I think that was back in 2013. At that time they had to be made by order, so it took a couple of months to get them. Another thing to note is I had to machine the "steps/notches" that are side to side on the bucket/shim bores. The lobes would not clear the existing steps/notches.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Mon Nov 20, 2017 3:39 am

Mister Anderson wrote:
BiNiaRiS wrote:
Mister Anderson wrote:I'm running Kelford 272's in my EJ25D heads. That was the only company I could find at the time that made cams for EJ20K/25D heads. I don't know if they still make them though. I thought I read something that Kelford was going to stop producing them.
How long ago was that? Their site has nothing listed.

I'm thinking my best bet is to just source some 20k cams at this point.
I think that was back in 2013. At that time they had to be made by order, so it took a couple of months to get them. Another thing to note is I had to machine the "steps/notches" that are side to side on the bucket/shim bores. The lobes would not clear the existing steps/notches.
Do you think there was a benefit to running the Kelfords over 20k cams?

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Re: Cam options for 25D heads

Post by dankberries » Mon Nov 20, 2017 5:17 pm

BiNiaRiS wrote:
Do you think there was a benefit to running the Kelfords over 20k cams?
Kelford 272 cams will have a bit more lift and duration than ej20k Cam's. You can't really say there is a benefit of one over the other, they both are in a different category of performance, ultimately that's a personal preference to suit your build.

The 20k Cam's do not require machining, but anything with more lift than that profile is likely to need some material taken out for clearance.
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Re: Cam options for 25D heads

Post by WRXish » Tue Jan 02, 2018 1:47 pm

BiNiaRiS wrote:So my hybrid build will be coming out soon, and figured I should look at cam options while there's easy access.

What options are there out their for cams? I know EJ20k cams fit, but they aren't too easy to track down. Tomei? Anyone else make them?
Crower made me a nice custom grind for mine. Idle almost like stock and they claim rpm range 1500-7000. My experience with this grind is that if you are even moderately spirited in your driving you will love em. they really do work well. Not much torque under 2000 rpm but the engine doesnt fall flat on its face either...its very tractable down low, but fuel economy suffers under 2000. above 2000, very crisp responsive, boat loads of torque, good fuel economy. Above 4000, she be a beast, pulls hard to rev limiter, never starts to lay down up top. Course, thats with considerable headwork done. Your mileage may vary. Ask for crower part number F17714 - if you want the specs on this cam just ask me.

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Re: Cam options for 25D heads

Post by carfreak85 » Tue Jan 02, 2018 4:32 pm

WRXish wrote:
BiNiaRiS wrote:So my hybrid build will be coming out soon, and figured I should look at cam options while there's easy access.

What options are there out their for cams? I know EJ20k cams fit, but they aren't too easy to track down. Tomei? Anyone else make them?
Crower made me a nice custom grind for mine. Idle almost like stock and they claim rpm range 1500-7000. My experience with this grind is that if you are even moderately spirited in your driving you will love em. they really do work well. Not much torque under 2000 rpm but the engine doesnt fall flat on its face either...its very tractable down low, but fuel economy suffers under 2000. above 2000, very crisp responsive, boat loads of torque, good fuel economy. Above 4000, she be a beast, pulls hard to rev limiter, never starts to lay down up top. Course, thats with considerable headwork done. Your mileage may vary. Ask for crower part number F17714 - if you want the specs on this cam just ask me.
Just post up those specs in this thread, please!
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Re: Cam options for 25D heads

Post by Mister Anderson » Sat Feb 10, 2018 1:38 am

Looks like RCM is making cams for the 20K; http://www.rallispec.com/eng_cam_rcmv4.html
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Re: Cam options for 25D heads

Post by jamal » Sun Feb 11, 2018 3:48 am

I'd be interested to know if rallispec has any around or if you'd have to wait for them to come from RCM.


One of the kelfords is listed at one of my distributors but is out of stock. Might be worth sending kelford an email to see if the still make them or have any around. If I could bring any in the pricing wouldn't be much less than those RCM parts though. Maybe 50-100 less. And a fairly long wait if kelford has any.


On the other hand, why not just use a newer manifold and heads? A wrx 2.0 isn't very expensive these days and lets you do the under the manifold inlet, shimless buckets, top feed injectors, more cam options, etc.
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Re: Cam options for 25D heads

Post by BiNiaRiS » Sun Feb 11, 2018 4:08 am

jamal wrote:I'd be interested to know if rallispec has any around or if you'd have to wait for them to come from RCM.


One of the kelfords is listed at one of my distributors but is out of stock. Might be worth sending kelford an email to see if the still make them or have any around. If I could bring any in the pricing wouldn't be much less than those RCM parts though. Maybe 50-100 less. And a fairly long wait if kelford has any.


On the other hand, why not just use a newer manifold and heads? A wrx 2.0 isn't very expensive these days and lets you do the under the manifold inlet, shimless buckets, top feed injectors, more cam options, etc.
That is a shit ton of work and what's it really going to do for me? 20k cams are pretty easy to find as well. That's probably what I'm going to end up doing. Or have them sent out to grind.

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Re: Cam options for 25D heads

Post by WRXish » Mon Feb 26, 2018 3:41 am

BiNiaRiS wrote:So my hybrid build will be coming out soon, and figured I should look at cam options while there's easy access.

What options are there out their for cams? I know EJ20k cams fit, but they aren't too easy to track down. Tomei? Anyone else make them?
I can offer another solution I didnt see offered here and I can tell you this is a combo that rocks. Crower makes cams for EJ25D heads Phase1 and I have a set in the heads that were on the engine in WRXISH. Good power from 1500-7000. Of course, my old leggy wont get to 7k but when the rev limiter cut in at 6800 it was still pulling hard.
Part number is F17714

Intake Duration 264 lift .337 clearance hot .006
exhaust Duration 278 lift .344 clearance hot .008

No CEL issues with this cam or low vacuum issues with the power brake booster...idle quality is almost stock...very very nice cam.

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