i pulled the vavle cover off my motor and the exhuats cam is split in 2 .... but it doesnt look like anything else is hurt.. does this mean the vavles have to be bent or somthing......

 

What cams were u using?

 

Jun 3's

 

man :/ i just bought a set of JUN 3s....is there any way to test em to make sure they wont break? lol

 

if you want extra insurance..have them Cyro-treated.

 

torque them down properly and you shouldnt have any problems. over torquing the cam caps can cause insufficient lubrication to the cams. the results are seizure of the cams therefore they snap. thats what i think

 

ANOTHER mis-installation of JUN III cams.... how long have you had these cams?

 

they wherent mis-installed.... i was running about 9k in 3rd gear and i shifted to 2nd instead of 4th.. bad driving maybe.... but i dont think that was my question....

 

hmmm. what were the signs/symptoms that convinced you to take a look at it? 'could help others too

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B19c5-eg6 &raquo;</TD></TR><TR><TD CLASS="quote">does this mean the vavles have to be bent or somthing......</TD></TR></TABLE>
might be... You'll really need to pull the head off to see what's going on in there. You could have dropped a valve, bound your springs, etc. It's difficult to know what is going on in there, unless you get the head off, and check everything.

 

it didnt drop a vavle maybe it bent one... i just dont know what would cause the cam to snap.. can it jump time or anything

 

If you weren't using ITR lost motion devices, that's likely what broke them. You can NOT run cams with more than .425-.430" lift with the standard-issue lost motion devices.
If you weren't running valve springs that can handle the lift of the JUN's, you'll also break the cams.....and if the valve keepers are early B16 pieces, they won't let aftermarket retainers pull up all the way and that'll also cause coil bind....and broken cams.
These cams aren't just bolt in and go by any means, nor are any cams with .475" lift and higher.
You also MUST check the camshaft to cam bore clearances too, because even Honda cams vary on journal diameters, which is the primary reason that Honda tells you how to check the clearances in the Helms manual.......... If you have to do it with stockers, you sure have to do it with non-Honda parts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Woofer &raquo;</TD></TR><TR><TD CLASS="quote">If you weren't using ITR lost motion devices, that's likely what broke them. You can NOT run cams with more than .425-.430" lift with the standard-issue lost motion devices.</TD></TR></TABLE>

it has been proven by Rocket that the ITR and GSR LMA are the same. (if you have issue with this talk to Rocket, not me.) What LMA were you using? Also just to note here I am running B16 first gen LMA and have had NO issues with my JUN III cams. This set up is over a year old now. I think retainers make more of a differance than the LMA... but that's just my theory.

 

No, No, No. Late GSR lost motion devices are, but earier GSR heads and B16 heads don't have the good ones with the wider pad at the top. If the pad's to onarrow, the tit on the bottom of the hi-cam rocker will ride off the edge and bind the valvetrain.
We make all this information available to Crower, so I'm sure Rocket's arware of it.
Bottom line is that you'd better look to see which ones you have before installing "big" cams. If the cam manufacture tells you you don't need them and you blow the engine up, he sould pay you for your expenses and time....

 

agreed.... Sorry about not putting the late model LMA, thought it was common knowledg.. but more than likely it isn't.

 

i have 1st gen (88-91) jdm b16a head with original LMAs. i'm running
CTR cams without any problems. would I be fine with Skunk2 cams?
i'm putting them in on Monday....

the head has been ported and rebuilt using ITR intake valves, Ferrera SS exhaust valves, new valve guides. new radius cut valve job with new vavle seals. new valve keepers. crower dual spring and crower tit. retainers.

thanks

 

You're living on borrowed time running the original lost motion devices. I have no motivation in telling you about this other than attempting to keep your engines healthy. We absolutely hate spending $28.00 per unit on these things here at Endyn, but I can tell you with certainty that your valvetrain will ultimately fail if you don't use them. Honda incorporated them in engines with ITR and CTR cams for a very good reason...just like everything they do....

 

Woofer do you know when they changed the LMA's for the gsr?

 

With all of the money we spend on our motors-headwork pistons-cams-valvetrain, etc., what is the big deal about spending a couple of hundred dollars on ITR LMA's? It is cheap insurance! Would you rather spend $200 on LMA's now, or rebuild or replace your motor when the cams break?

 

Larry, i have an early (94-95) B18C GSR head which i'm going to use (less core-shift, right?). i got new ITR LMAs, and i'll be trying Rocket's ef-1 springs and Ti retainers, and possibly your valves, but i need to know if my stock keepers would pose any sort of problem with this combo when used with Jun 3 cams, occasionally reving to ~9500 rpm (your pistons, Crower rods, B18C block/crank). Rocket said that he's designed his Ti retainers for (sensible) use in daily drivers, but i've heard recently that sometimes the stock keepers can ruin Ti retainers and cause 'mushrooming' on the stainless valves.

 

If the keepers are the black-oxide coated ones, they're the good (hard) ones. If they're silver in color, chunk 'em and buy new GSR/ITR keepers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Woofer &raquo;</TD></TR><TR><TD CLASS="quote">If you weren't using ITR lost motion devices, that's likely what broke them. You can NOT run cams with more than .425-.430" lift with the standard-issue lost motion devices..</TD></TR></TABLE>

I disagree.

I run 402`s all day (and have been for 2.5 yrs) on OBDI GSR LMA`s and according to Brian Crower I don`t need to swap them out. I`d really like to se some solid proof of these differences in between the 2 units.
And yes, I have broken a set of Crowers, and it had nothing to do with LMA`s, it ws the valve springs...

 

i'll check, but i think that i lucked out. also, the Endyn/Supertech valves that i have, i purchased through Payn Tech last year. (i read your post in the 'mushroom' thread.) i wanted the flatbacks, but Tom said that at that time, only the dished ones were available, and i wanted to get them at the intro price, so that's what i have; stock size.

 

I can't afford to have problems, and life on the edge doesn't make for a good night's sleep here.

 

are 96+ gsr head LMAs same as ITR LMAs?