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Old 03-28-2009, 01:04 AM   #1
wrxG
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Default brian crower valves

i just put in a set of ej20 Brian crower valves and the clearances between cam loops and buckets are huge now over .26 .. that's to much clearance i know that much. So are those valves shortet than stock or something i don't get it i thought i order stock size valves
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Old 03-28-2009, 05:07 AM   #2
alcoolaid
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Do some calculations and order the correct buckets that will give you the correct clearance. They come in many sizes.
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Old 03-28-2009, 11:30 AM   #3
kevinh211
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i think the valves are shorter then stock. you just need to get the correct sized buckets and mix and match yours to get the correct clearances.
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Old 03-28-2009, 04:59 PM   #4
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my STI needed a lot of big buckets, but it worked just fine
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Old 03-29-2009, 12:20 AM   #5
wrxG
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yea me and my buddy moved the buckets around today .. we were able to get the exhaust clearances right but still going to have to order 8 intake buckets its like another $200 i wish brian crower mentioned that .. if i knew id never buy them
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Old 03-29-2009, 04:49 AM   #6
benw
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all cam installs will be like that. it's not BC's fault, it your fault for not knowing the details. I'm not trying to be mean but that's how to process goes.
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Old 03-29-2009, 09:21 AM   #7
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Like Ben said, they are all like that.
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Old 03-29-2009, 11:15 AM   #8
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FYI - Supertech offers the valves in std lengh as well as shorter. The shorter ones are designed to account for work done to the vlave seats which would sink the valves over the stock position.
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Old 03-29-2009, 03:13 PM   #9
wrxG
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how was i suppose to know i had the brian crower 272 cams springs and retainers with stock valves and the clearances were perfect and now i decided to update to update to STANDARD size BC valves which i would think theyd be the same as stock right so how the f**k is it my fault!
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Old 03-29-2009, 04:06 PM   #10
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Benw was not trying to be smart on you man so take it easy. Anytime you change up cams/valves/valve train components, expect to at least have 3-6 reshimms to adjust for lash. Its just the way it is man but glad you got it all figured out.
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Old 03-29-2009, 11:21 PM   #11
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Quote:
Originally Posted by wrxG View Post
how was i suppose to know i had the brian crower 272 cams springs and retainers with stock valves and the clearances were perfect and now i decided to update to update to STANDARD size BC valves which i would think theyd be the same as stock right so how the f**k is it my fault!
because every head is different. That's why there are tons of different bucket sizes. If they can't do it at the factory, what makes you think you can do it in the aftermarket?
You ALWAYS have to do a valve lash adjustment when adding cams. It is IMPOSSIBLE for them to know what your valve lash is going to be when everything is installed in your head.

Many cams have different base circles, cam bearings are bored a few thousandths different in each head, valve seats are different depths etc etc etc.

It is not the fault of BC. It is the fault of your ignorance of the operation and construction of the Subaru head. This is one way to learn about your car; trial and error. The other is to read up fully or have someone build it for you. We have a "build your own engine" program that teaches you how to do it all when you purchase an engine package.
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Old 03-29-2009, 11:54 PM   #12
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^^ so what you sell BC products so your so your sticking up for them? my ignorance of the the subaru head?? wtf...you're not helping here at all .. all you're doing is making me mad alright
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Old 03-30-2009, 12:26 AM   #13
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are you 12? Grow up.

no, actually, I don't sell BC products.

What kind of help do you desire? Do you want me to wave my magic wand and make your cams fit suddenly?

Measure the current clearance.
Determine which way you need to go.
Add that to the current bucket size if you have shimless buckets, or add it to the shim size if you run shims.

An 02 wrx has shim over buckets from the factory. I would recommend going to shimless buckets. This is better for high lift and high rpm durability/reliability. They run around 16-20 bucks a bucket. Just be sure to purchase the right size.
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Old 03-30-2009, 08:52 AM   #14
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Dom, to add to this; I would know first hand the the BC valves are suprisingly short. I sand my valves ( but at least it was mostly on the exhaust side) to make them fit properly...this was after doing some serius seat work on my head. I had drop them about another .008-.012" from what they had already been cut down to.

I didn't check with BC to make sure that they were standard length, which was my fault but also doesn't effect me much as I just went into the machine shop, slapped them on the serdi and cut em.

OP; you made the same mistake that I did...that being not doing your homework to order the right part (well mine was more brainfart)...regardless, there is nothing any of us can do to help you at this point.

Last edited by Homemade WRX; 03-30-2009 at 09:05 AM.
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Old 03-30-2009, 10:03 AM   #15
wrxG
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it all figures out now .. going to order the buckets today thanks for all the info guys .. its my first time updating valves on a WRX head so when i found out i had to but new buckets i was kinda pissed .. but hey now i know how it works
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