hello, what are the best adjustments of valves for b series?

 

The ones in the service manual work really well.

 

They can be found in the SEARCH button too

 

I know the honda oem ...my question is if there is any better

 

.006-.007in on intake and .007-.008 on exhaust

 

iam from portugal... 19 intake and 21 exhaust in auto data...

 

Yes that's what we use here in u.s

The tighter u can get within those specs I heard is little better performance. That's what manual book calls for anyways.

 

15 / 20 is nice? because the tool as 15 and 20 not 19 and 21 -.-

 

The confusion within the numbers given here by many different posters is that the references are given in two different systems... SAE and Metric.

The SAE (English Standard) reference of .006" Intake/.007" Exhaust is measured in thousandths of an inch. The factory Honda service manual expresses a range of adjustment given in SAE as .005"-.007" Intake and .006"-.008" Exhaust.

The Metric equivalent would be .196mm-.276mm Intake and .236mm-.315mm Exhaust.

The theory of tightening valve lash/clearance to increase performance is scientifically accurate, however, the amount of increased lift will be nominal, at the expense of decreased oil film between the rocker arm and camshaft lobe... increasing the potential risk of camshaft lobe wear. Also remember that as the engine warms up, heat expands metals and those clearances shrink from the preset values. More aggressive camshafts tend to require a little more oil film to survive, requiring an extra thousandth or two to minimize lobe wear.

I suggest you follow the manufactures guidelines as well as those suggested by any aftermarket cams that you use.

 

ok thanks