After looking through a book of service records on my car, I realize that the previous owner hadn't had a valve adjustment performed ever. I've had the car since 24k just for the record.
Anyhow, the vtec engagement hasn't ever impressed me. It's about as mild as my '97 Prelude was with 130K. I've had a '00 ITR with i/h/e and the vtec was a lot more powerful. Despite the cam difference, could this be attributed to the valves?

Sweet. Post number 666...

 

is this on an ITR? that wasn't very clear..

but I doubt the valve adjustment would have that major of an impact.. I guess it could effect it a little, but not THAT much.. maybe your butt dyno is broken..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mstewar &raquo;</TD></TR><TR><TD CLASS="quote">is this on an ITR? that wasn't very clear..

but I doubt the valve adjustment would have that major of an impact.. I guess it could effect it a little, but not THAT much.. maybe your butt dyno is broken..</TD></TR></TABLE>

Yep '97 CW.

 

Major changes in valve adjustment could technically be felt.
For instance, if your valves are, say .011 gap, and you change them to .008 you're increasing the lift by that much. You're also changing the duration in that the cam will open sooner, and close later since the rocker is now closer to the cam itself. It's all just technicalities though, and unless you're way out of tune, you won't feel much.

On a side note, valve adjustments can affect boost.
I saw an increase of .5psi after tightening my valves to the tightest spec settings. When I reset them to the loosest setting, I was back at 9psi again.

funky ****.

 

Thanks for the info.

Anyone else?

 

VTEC thrust

 

Well, i did a valve adjustment on my R last year and i do remember doing the valve adjustment and feel the " thrust", it was noticeable even to my friends. It was my first valve adjustment and it might have an impact. *** dyno or not, i think i remember reading somewhere that on a higher mileage car, fresh oil and a good valve adjustment has "replenished" up to 4 wheel horses. Maybe its my *** but i read that somewhere, if i can find it ill post it up.
Valve adjustment is always good to make sure your cams are opening the valves all the way. Might not make a difference at low rev's but i'd imagine there being some benefit on the top end.

 

Nvious R, I've done a ton of valve adjustments while installing jdm motors into customers cars, aand if they're out enough, you'll definately feel it once you reset them.

FYI, if you go too tight, the car will stumble and could stall. It's like running the T belt a tooth off. I found that out the hard way too.

 

Check your clutch? Slipping?

 

I don't think it's that (clutch slipping). Wouldn't the tach rev up unnecessarily? Besides, wouldn't you be able to smell the clutch after, say, an autocross run or something?

 

It's good when ya don't feel vtec, but only hear it!

That's if you are tuned of course.

 

yea, my valves were way outta wack on my 96 r motor, after an adjustment, the "thrust" actually didnt feel as hard, it was a much smoother transition.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hypa &raquo;</TD></TR><TR><TD CLASS="quote">Nvious R, I've done a ton of valve adjustments while installing jdm motors into customers cars, aand if they're out enough, you'll definately feel it once you reset them.

FYI, if you go too tight, the car will stumble and could stall. It's like running the T belt a tooth off. I found that out the hard way too.
</TD></TR></TABLE>

Good info. Guess what happened when i adjusted mine too tight? I cracked a Retainer, LoL. Not only that, top of the valve mushroomed too.

The Retainer's outer ring broke apart from the inner ring so basically, the outside rim of the retainer broke off and Only the INNER valve spring was on the retainer, the outside piece went to *****. Damn Titanium garbage.

 

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

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dont think that has much to do with how much of a power difference a valve adjustment does

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nvious R &raquo;</TD></TR><TR><TD CLASS="quote"> I cracked a Retainer, LoL. Not only that, top of the valve mushroomed too. </TD></TR></TABLE>

ACH!
As bling and light as Ti retainers are, I've still had mine on the shelf for almost a year and a half because I fear galling. Ti and steel don't work well together, as you found out the hard way.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slow_Em1 &raquo;</TD></TR><TR><TD CLASS="quote">

dont think that has much to do with how much of a power difference a valve adjustment does </TD></TR></TABLE>

Yeah, I know but I just wanted to clarify that I wasn't drifting into the wrong forum as I've seen often times.

anyone else?