On Crowers site they wrote:
"The Crower spring/retainer kit 84167 features a +.060" installed height retainer to allow more spring travel. This added installed height may interfere with the bottom of the rocker arms. If that occurs, you must machine the underside of the rocker arms for proper travel."

Now I'd like to do this to be a DIY affair, but do I need to take it to a speed shop to do the install? I don't think I have the proper tools to create clearance if need be. Has anyone run into this problem, btw what type of tool would you need?

 

I believe Import Tuner's magazine for December had a DIY for a B16 (camshaft, valve spring, retainer...etc)....maybe it'll help. Go to their website and order this months copy i guess. Or just get a manual <--manuals always help a bunch.

 

I do have a the Import Tuner article and a HELM's manual :-). The article doesn't talk about making any clearances, i'll check the helms though. Just wondering if anyone had this issue w/crower cams b/f.

 

You will have to machine the rocker arms for clearance! If you can do it, then install yourself, but just remember, I had to machine all but one of mine!

 

What did you use to machine it?

 

if its for an h22 u def have to machine, i did on both my heads, i had the machine shop do it though

 

grinder

 

a pedestal grinder will work just fine. Just smooth out the material underneath the rocker, then install it and visually check that theres a gap between the spring retainer and the underside of the rocker. Theres not a ton of material that needs to be removed. Prolly only takes about half an hour.

 

woah woah woah... wait a minute.

do you have to do this regardless of what springs/retainers you buy, or is it just the crowers? i just bought some crower 2's for my prelude but i ordered portflow springs/retainers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22terror &raquo;</TD></TR><TR><TD CLASS="quote">woah woah woah... wait a minute.

do you have to do this regardless of what springs/retainers you buy, or is it just the crowers? i just bought some crower 2's for my prelude but i ordered portflow springs/retainers.</TD></TR></TABLE>

no its just for the crower valvetrain, thats what i was going to tell the writer of this thread, just go with some other valvetrain like portflow, supertech, skunk 2, KMS, etc.

 

*whew*

 

Why would crower make their valvetrain interfere w/the underside of the rockers? There has to be a reason???

 

Wouldn't it be better to stay w/the crower valvetrain. Their valvetrain is designed to work w/their cams. And i'd imagine not create those destructive harmonic frequencies.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtech22 &raquo;</TD></TR><TR><TD CLASS="quote"> no its just for the crower valvetrain, thats what i was going to tell the writer of this thread, just go with some other valvetrain like portflow, supertech, skunk 2, KMS, etc.
</TD></TR></TABLE>
Can you reccomend one of these valvetrains over the other in terms of quality and durability? Or are they all pretty much on the same page?

 

*bump*

 

The reason crower does this is because when you get high lift cams you are compressing the valve spring further. The valve spring length was designed for stock cams and can only safely be compressed so far. Crower uses an offset retainer to get more travel out of the spring without damaging it or shortening its life.

So if you buy Crower cams and they tell you to use the offset retainers than you absolutely must! As far as I know you only need those retainers on a crower stage 3 cam.

I assume you will buy springs and retainers anyways.

 

You want the springs also.....I stuck with all crower because they were engineered as a package and I trust their R&D on head things.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by precisionelite &raquo;</TD></TR><TR><TD CLASS="quote">Why would crower make their valvetrain interfere w/the underside of the rockers? There has to be a reason???</TD></TR></TABLE>

yes, of course there is a reason, Crower does it properly......any retainer will hit the valve seal with the guide in stock position ~@ 0.480" lift.........so crower moves the retainer up the valve so this does not make a colision, especially during a mis shift.

the clearancing of the arms is really not a big deal, once you know whats going on.

any other Brand of valvetrain I have seen simply ignores the closeness of the seal issue and runs them at stock or near stock height, this is rolling the dice IMO.

Few people seems to pay attention to critical details......I have even notified supertech, (they do make nice valves), but some of their valves were slightly shorter than stock......slightly, meaning not a huge deal or anything, but enough that it should be corrected.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PocketRockets Racing &raquo;</TD></TR><TR><TD CLASS="quote">

yes, of course there is a reason, Crower does it properly......any retainer will hit the valve seal with the guide in stock position ~@ 0.480" lift.........so crower moves the retainer up the valve so this does not make a colision, especially during a mis shift.

the clearancing of the arms is really not a big deal, once you know whats going on.

any other Brand of valvetrain I have seen simply ignores the closeness of the seal issue and runs them at stock or near stock height, this is rolling the dice IMO.

Few people seems to pay attention to critical details......I have even notified supertech, (they do make nice valves), but some of their valves were slightly shorter than stock......slightly, meaning not a huge deal or anything, but enough that it should be corrected.</TD></TR></TABLE>

good info