just curious if valves seem to tick louder with built motors, in particular with JUN3s installed. My motor is still freshly built(less than 130miles since rebuild), and not even completely tuned yet, but the valves seem to be ticking very loudly. You think its just part of the break in and things starting to settle and maybe I just need a valve adjustment? Unfortunately Im still not able to drive the car, so the miles Ive put on are only from the dyno and very short distance drives. Ive also got the JG manifold that thing seems to make the motor sound very "tinny" so I wonder if that amplifies the ticking at all. I hope its just a sign to check the valves again and Ill be able to make it quietet and smoother sounding again. Thoughts? I could even make a quick soundbite if anyone wants to hear it.

 

after the first few hundred miles or so the valve clearances will loosed up a bit. your gonna have to go back and re-adjust them again after you complete the engine break in.

also some people will say that JUN, TODA, Skunk2 etc......cams will cause the valve-train to tick a little more than normal because of the high lift/duration.

HTH

 

Yeah, it should be louder than stock. I think the fact that you are using stiffer valve springs with higher lift cams, it should make more noise. That and your LMA's weren't made to work with jun cams, but i don't see a problem with that since a bunch of people are running jun cams on even gsr lma's. You drove 130 miles on the dyno?! haha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StinkyTofu &raquo;</TD></TR><TR><TD CLASS="quote">You drove 130 miles on the dyno?! haha</TD></TR></TABLE>

no, more like 25 or so on the dyno. the rest has just been puttin around town, getting pulled over and arrested, highway racing, burnouts, etc

 

My motor sounds like a diesel at idle because of the ticking I think that in my case, it might be my LMAs because my lash is adjusted to stock spec as per JUN's instructions

 

valve lash?

 

not sure what all this "valve lash" and "LMA" is...anyone care to explain what that stuff is

 

Just put in Skunk stage 2's, and the tick is certainly more noticeable. 300 miles on mine so far.

 

I wish I knew what this ticking sounds like. I would like to know if my valves need to be adjusted. When the valves tick, does that mean they are hitting their seats?

Would this bend/damage them?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by canuck-mx6 &raquo;</TD></TR><TR><TD CLASS="quote">My motor sounds like a diesel at idle because of the ticking I think that in my case, it might be my LMAs because my lash is adjusted to stock spec as per JUN's instructions</TD></TR></TABLE>

Are you using ITR LMA's?

 

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

Are you using ITR LMA's?</TD></TR></TABLE>

Nope, still using the GSR LMAs which are not as stiff as the ITR's. Next time I have a long weekend, I will pull the cams and the rockers and swap the LMAs for the ITR ones

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2 &raquo;</TD></TR><TR><TD CLASS="quote">not sure what all this "valve lash" and "LMA" is...anyone care to explain what that stuff is</TD></TR></TABLE>
Valve "lash" is another name for valve clearance. Spec on GSR/Type-R is 0.17mm +/- 0.02mm on the intake valves, 0.19mm +/- 0.02mm on the exhaust valves. "LMA" stands for lost motion assembly. The mid rockers ride on the LMA's, being pushed by the big mid (vtec) lobes. When the car is not in VTEC, the mid rocker travels further than the primary and secondary rockers, and the only thing stopping it is the lost motion assembly. The LMA is basically a little spring loaded piston that acts kind of like a shock absorber, and keeps the rocker arm in contact with the cam lobe.. Once the car hits VTEC, the mid rocker arms are locked with the primary and secondary rocker arms, which are the rocker arms that actually push on the valves. All of the rocker arms are now following the big mid cam lobe. The valve springs are now what controls the closing of the valves, and what keep the valves in contact with the rocker arms on the down side of the cam lobe.

 

Another thing it might be, which most people associate with being valve tick, but in fact is not...lound injectors...often when you're still using the stock injectors or ones that are too small, they tend to be working at a very high duty cycle, especially at higher pressures.

I had a same sort of valve tick, but when I replaced my stock injectors for some larger ones, the tick almost went away. In your case especially with a large intake manifold plenum, the sound tends to be amplified...though, honestly, not much...

What size injectors are you running, and with what compression and displacement???