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Old 02-11-2009, 01:00 PM   #1
bigmike25rs
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Default Who's installed Kelford 272's?

Just picked up a set for my current build. Just wondering what kind of fittament issues people have had.. After talking to Kelford, they said there may be some rotating issues (hitting castings in the head) Anyone expirience this? Also, how about valve clearance? I've heard new buckets are reccomended, but I'm not sure how that would remedy a clearance issue unless Subaru offers different sizes..
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Old 02-11-2009, 01:22 PM   #2
Fongers
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You shouldn't have any issues with 272s as that is not a lot of lift but not exactly sure on the kelfords. There are folks running much higher lift than than 280+ that are doing ok so I'd be very surprised.
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Old 02-11-2009, 01:40 PM   #3
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I am running them, no clearance issues. I think RAW says the largest AVCS cams you can run are before having clearance issues is 276/272
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Old 02-11-2009, 02:10 PM   #4
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272 with what lift? 10.5, 10.7, 11, 11.2, 11.5?
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Old 02-11-2009, 02:12 PM   #5
cnstman
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http://www.camshaftshop.com/home?pag...category_id=65

that sheet says slight clearancing is required, but mine did not require it.
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Old 02-11-2009, 02:22 PM   #6
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What's the kelford part#? On some kelfords for the STI you need to clearance the front cam cap girdle on the # 1 and #2 cylinders.

As far as valve lash clearance, you either need to measure and install the correct size buckets to achive the correct lash. Or have the machine shop back cut the valves on the stems to get the correct lash. If your planing on just installing the cams yourself the bucket method works best, because your not taking the valves out. One thing to note I highly recomend getting the cam jurnals aline honed to make sure they are straight and the clearances for the new cams are correct.

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Old 02-11-2009, 02:30 PM   #7
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Quote:
Originally Posted by mick_the_ginge View Post
272 with what lift? 10.5, 10.7, 11, 11.2, 11.5?
11.30 inlet 10.70 exhaust. I figured maybe the bucket journal may need some shaving to accomodate the larger lobe. Part # R-199-C
Mick, I've followed alot of your build threads. Any thoughts?

Also, the valves will be coming out. I have a Supertech dual spring kit I'm going to be installing as well..
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Old 02-11-2009, 02:32 PM   #8
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On the 199c the cam cap girdle needs to be clearanced just a little on #1 and #2.
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Old 02-11-2009, 02:37 PM   #9
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Cool, thanks alot.. Now, does Subaru offer buckets in multiple sizes? Kelford reccomends new buckets..
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Old 02-11-2009, 02:49 PM   #10
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I would bet that the exhausts will be fine but the intake are going to be very close or hitting something with a lift of 11.3mm. I was under the impression that 11.0mm was about the max lift before the cam lobe hits either the intake cam cap or the side of the casting around the bucket (or both)

Clearancing either should not be a problem while you have the heads apart.

Buckets come in loads of sizes. You will need to work out what size you have in each hole (mic them, don't assume the number stamped on them is still correct) Then bolt everything down and measure the clearance. Then you can calculate what size bucket you will need to get the desired clearance. I usually do 8 thou intake and 10-12 thou exhaust. It's much easier to do if you have a reference set of buckets or lucky enough that you have 4 the same size bacause you can do one cam at a time.
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Old 02-11-2009, 06:04 PM   #11
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Quote:
Originally Posted by [email protected]&L View Post
On the 199c the cam cap girdle needs to be clearanced just a little on #1 and #2.
+1. It's not that bad and nothing you can't handle with careful use of a die grinder and/or a file.
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