I Did a valve adjustment on my Civic last week and it feels and sounds different. Right away I noticed My Mid Range and Top end Have lost power noticeably.

Intake was lashed at .006 and exhaust is at .007

Setup:
B18C With stock head
Wisco 8.8 to 9.1 comp
Scat H-Beams
Head-studs
blah,blah blah

Freshly built 1,200 miles ago not yet boosted

I would like to know if anyone has experinced this or am I amagining this?

 

you probably did the valve lash incorrectly and have them too loose, are they loud? or are the valves quiet and make the car hard to idle?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EARLdaSQUIRREL &raquo;</TD></TR><TR><TD CLASS="quote">you probably did the valve lash incorrectly and have them too loose, are they loud? or are the valves quiet and make the car hard to idle?</TD></TR></TABLE>

When i did them I actually did them tight and it did quiet them down, They're not noisiey. and it idels normal.

My Low end torque is the same but *** soon as it gets to 4,500rpm there is no power, and i know the low comp isnt helping any but it ran Sooo good before i did the valve adjustment.

 

how do you know you are loosing power? Butt dyno?

 

i would redo them, it sounds like they may be on the tight side

 

Three possibilities:
1. You did the valve adjustment incorrectly
2. It's in your head
3. They were tight before which "simulates" more camshaft and the engine wants more cam

 

stock cam?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EARLdaSQUIRREL &raquo;</TD></TR><TR><TD CLASS="quote">i would redo them, it sounds like they may be on the tight side</TD></TR></TABLE>

I Think i will redo them! intake at .006 and exhaust at .008

Ill do them not so tight<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">Three possibilities:
1. You did the valve adjustment incorrectly
2. It's in your head
3. They were tight before which "simulates" more camshaft and the engine wants more cam</TD></TR></TABLE>

Stock cam

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">Three possibilities:
3. They were tight before which "simulates" more camshaft and the engine wants more cam</TD></TR></TABLE>

I dont really understand this. What do you mean by "The engine wants more cam"?

Since I lashed them tight can it cause my problem?

 

well u did break in ur motor right? mayb the motor feels different after the rings seat

 

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

I dont really understand this. What do you mean by "The engine wants more cam"?

Since I lashed them tight can it cause my problem?</TD></TR></TABLE>

What he is saying is the tigher the lash, the closer the rocker gets to the cam. This allows the valve to open more.

 

well if you do it wrong you'll lose power...

 

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

What he is saying is the tigher the lash, the closer the rocker gets to the cam. This allows the valve to open more.</TD></TR></TABLE>

Should i redo them and to what lash

if i redo them should i do them tighter or could they be too tight?

 

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

Should i redo them and to what lash

if i redo them should i do them tighter or could they be too tight?</TD></TR></TABLE>

were they loose or tight before the adjustment?

 

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

were they loose or tight before the adjustment?</TD></TR></TABLE>

They seemed tight.

Well i relashed the gaps
Intake at .006
Exhaust at .008


Ill let you know after driving it

 

Well it seems to run better with the exhaust a little bigger lash. I might re-lash the intake to .007 and see how that runs

 

Since you are running low compression, if you add duration/lift ( tight lash) you will loose even more dynamic compression . . . could be making the sluggish motor even worse

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HAMOTORSPORTSUSA &raquo;</TD></TR><TR><TD CLASS="quote">Since you are running low compression, if you add duration/lift ( tight lash) you will loose even more dynamic compression . . . could be making the sluggish motor even worse </TD></TR></TABLE>

Thank You I was hoping someone would say that. Thank you all for your help

 

I Just replaced my stock cat Today ANd all the power i lost is back. So if anyone reads this I was struggleing for my power loss and days of troubleshooting and it was all my cat