quick question, what is "Intake Valve Opening Crank Angle BTDC"? and what is it for a stock b18b?

 

It refers to the crank position where the valve is open a given amount (usually specified at .050" or 1mm of valve lift).

On the intake cam, it specifies the crank angle before top dead center of the start of the intake cycle where the valve is open that .050" or 1mm amount.

I've never worked with the stock B18B cams, so you got me.

 

so would that mean the crank degree would be different depending on valve lashing?

 

Your intake valve should open .050 at around 28-32 degrees BTDC. Thats what it should be for any normal four cycle motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HmgLauj69 &raquo;</TD></TR><TR><TD CLASS="quote">so would that mean the crank degree would be different depending on valve lashing?</TD></TR></TABLE>

 

When you increase lash, you effectively decrease the cam duration. It will changed the valve opening marginally, but shouldnt change the intake centerline.

 

oh...cool, i think i understand it now