the exhaust vtec lobes are wearing out and the others are perfect. the stock cams were in perfect condition too.

i adjusted the valves twice, and the lobes are wearing like crazy, the cams only have like 50 miles on them.

its a b16a with CTR cams, EF1 valve springs.
check my sig to my page to see full details of the engine.
thanks in advance.




Modified by zcnos at 10:50 PM 5/15/2004

 

whats you oil pressure like? Looks more like its not getting oil....

 

who installed the valvesprings?

were the cams coated in molylube before install?

 

how many miles are on the rocker arms? the hardness on them is only about .010 thick and if you had a lot of miles or ran it low on oil for long periods of time you can wear the rocker arms out. also i have seen a stock itr do that to a cam lobe before. maybe you have some debri stuck in the oil squirters, the motor does look really old with a lot of varnish!

 

because it is not wearin like that.

 

you migth want to take the cams out before you break a retainer

 

the oil pressure is good. it idles realllly low and its only at like 10psi, but anywhere above that it goes up to 60-70. its a brand new jdm motor. i just fired it up for the first time last week.

the weird thing is that its only on the exhaust side. the intake cam is perfect. and the REALLY weird thing is that my friend had the same motor with the same cams and valve springs, and it did the same exact thing (on the exhaust side only) could it be from the rocket springs?

 

What lost motion assemblies are you using? If they're not ITR/CTR or very late model GSR/B16 pieces, they'll bottom out and bind the rockers, especially the middle one.

 

i dont understand. what is 'lost motion assembly' ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zcnos &raquo;</TD></TR><TR><TD CLASS="quote">i dont understand. what is 'lost motion assembly' ?</TD></TR></TABLE>

Read this for info on what it is and does: https://honda-tech.com/zerothread?id=478322

 

Generally that is bad rockers.

 

the motor makes no noice and everything seems fine. what gets me is that is was perfect until i put these CTR cams and rocket springs in. i dont know what to do now. the rockers look like new too.

 

something wasnt installed correctly,wrong parts or no lubrication during install...

 

since that is a possiblity, i wonder if it will get any worse if i just leave it. i might drive it a couple days and check it again. or i will just put the stock exhaust cam back in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Woofer &raquo;</TD></TR><TR><TD CLASS="quote">What lost motion assemblies are you using? If they're not ITR/CTR or very late model GSR/B16 pieces, they'll bottom out and bind the rockers, especially the middle one.</TD></TR></TABLE>

where can i get ITR LMA?

another question: who can regrind my exhaust cam to make it like new again?

 

What was the installed height of the exhaust valve springs. Maybe they were put in to short and you have unreal seat pressure, hence making it very difficult for the lobe to open the valve. Just a thought anyway. I do know Rockets vavle springs are very tight as they are already, if it was installed with a different then recommended seat pressure perhaps that is the culprit for the quick wear.

Also what was the valve lash set to. I think exhasut is good to set @ .009 and intake @ .007. Some people like to go with .008 on both sides though. Either would be fine. \
Hope this might help you out a little.

 

ZCNOS,

Send me your exhaust cam and I'll regrind it for free with a better profile and we'll replace the worn rocker arms.

I wouldn't blame the springs or spring pressure since all aftermarket spring have more pressure and we've not had a problem yet with many many people running our springs. Notably Johnzm running his B16 to 10k rpms for 1.5 years and 99Hybrid_Hatche's 450+whp turbo motor.

Thanks for you guys positive reply's, it is really much appreciated here.

 

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

Send me your exhaust cam and I'll regrind it for free with a better profile and we'll replace the worn rocker arms.
</TD></TR></TABLE>

When you re-grind a cam doesnt that take material off which in the end makes it lose profile or duration?

By the way i am not doubting you or meaning anything negitive by the question. I have your valve springs and retainers. Plus i think your work it just amazing but i dont really understand re-grinding a cam.

for that service offers a regrind and rockers arms. can't beat that.

 

Cams operate on a circle so if you take material off of the opposite side you can get more lift etc on the other side. That's the difficult part to comprehend.

We have a nice profile that can be ground on the CTR vtec lobe.

Thanks!

 

springs may be too stiff.....i had ef-1 springs and the inner ones were too stiff.........get some itr outers and portflow inners

 

You weren't using EF1 retainers. that's why...and they are not to stiff, it's that they won't clear over 12.1mm if lift w.o the ef1 retainer.. that's why they didn't spec out on yur motor damian...

 

woah woah woah, so if i get ef1 retainers i should be good?

if i put in the stock exhaust cam for now (while ctr is getting reground), do you think it will be ok ??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MaxBoost &raquo;</TD></TR><TR><TD CLASS="quote">You weren't using EF1 retainers. that's why...and they are not to stiff, it's that they won't clear over 12.1mm if lift w.o the ef1 retainer.. that's why they didn't spec out on yur motor damian... </TD></TR></TABLE>
what?

lets look at the facts:
first off, if my memory serves me correct, the retainers take AWAY height from the spring. so it would work against him, not for him like you were saying.

if that even was the case, then rocket should have told the dude when he bought them to get his retainers. maybe rocket can chime in here.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecdamian &raquo;</TD></TR><TR><TD CLASS="quote">springs may be too stiff.....i had ef-1 springs and the inner ones were too stiff.........get some itr outers and portflow inners</TD></TR></TABLE>
anyone else want to chime in that hasnt posted their experience with rockets stuff.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rocket &raquo;</TD></TR><TR><TD CLASS="quote">
Send me your exhaust cam and I'll regrind it for free with a better profile and we'll replace the worn rocker arms.
I wouldn't blame the springs or spring pressure since all aftermarket spring have more pressure and we've not had a problem yet with many many people running our springs. Notably Johnzm running his B16 to 10k rpms for 1.5 years and 99Hybrid_Hatche's 450+whp turbo motor.
</TD></TR></TABLE>
so he pays 150 or wutever for new valve springs, in exchange he gets an exhaust cam that has wear marks with just 50 miles of use, then you send him a regrinded cam. Isnt the honda profile pretty damn good to begin with?
how is it known that the new profile will perform better?

if he ever sells his cams, then he will have hardly any resale value because of this.

johnzms car only has b16 cams which will help with a lower spring pressure.
didnt davids car have gsr cams? Same thing, lower spring pressure.

 

Rocket, I wasn't faulting your springs at all, I just thought they might be overkill for some CTR cams. Kind of thought that my post may have been misinterpreted by you. I love your stuff also.

As far as using his retainers. Correct me if I am wrong but using Rockets retainers will INCREASE total availabel spring. More clearly you can lift 13mm with his springs if his retainers are used as well.

I also didn't realise this cam weasr happened in only 50 miles. Perhaps there was a lack of lube on install?

Also I still have not heard what the valve lash was set to? Perhaps it was way to tight?

I hope you figure it out.

 

word.

im putting in the stock exhaust cam for now. my $400 cams are smoked because of 1 stupid mistake. it DEFINITELY looks like a coil bind issue now that I think about it.

And on my friends car with the same problem, he never checked it and it kept wearing and wearing the cam. i checked the spec on it with a mic and it had almost identical lift of a stock cam. it wore it out until it was back to stock size. interesting isnt it.