"When installing cams with high lifts and long durations, a few general observations are worth keeping in mind. Remember that additional cam duration can produce more usable power but too much duration may actually hurt overall performance. The problem of poor engine response begins when too much duration results in lower cylinder compression pressure (at low RPM) which in turn can reduce low RPM torque and power. Too much duration in a camshaft is not necessarily a good thing."

thats the same thing my car is doing after installing some web cams, low rpm is driving like crap. anyone else have anything to add to this?

 

Sounds like more of a tuning issue than a cam issue.

Have you had your setup tuned on a dyno before?

 

Thats why there is a VTEC. You have the lower duration and lift cam for the lower rpm range and the higher lift and duration for the VTEC lobe for the higher rpm ranges. So you get good low end response and good top end power. If you had a non vtec engine and you put a radical cam yes your low end is usually going to suffer so you can make more top end power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aj99si &raquo;</TD></TR><TR><TD CLASS="quote">Thats why there is a VTEC. You have the lower duration and lift cam for the lower rpm range and the higher lift and duration for the VTEC lobe for the higher rpm ranges. So you get good low end response and good top end power. If you had a non vtec engine and you put a radical cam yes your low end is usually going to suffer so you can make more top end power.</TD></TR></TABLE>

you sure about that??????

 

yes, i'd say that paragraph could be true for a standard, non-vtec type of camshaft function.

you'll want to know what dynamic compression ratio is, and how it's calculated, and things like cam overlap, intake valve closing event, etc... just saying "webcams" is meaningless, you need to know the cam specs... also think about why race cams are difficult, if not impossible, to run on the street.

http://www.smokemup.com/auto_m...o.php

http://victorylibrary.com/mopar/cam-tech-c.htm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like more of a tuning issue than a cam issue.

Have you had your setup tuned on a dyno before?</TD></TR></TABLE>

not yet, gonna look into having that done on wednesday