Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Variocam Monkeybusiness
#21

That chart on page 46 of the article spells it all out. Saves me the effort to test! <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" /> The article also is consistent with common cam timing technology.



Good find. I am sure I have looked at that once long ago, but there is just too much out there to remember.
Partial Post: Please Login or Register to read the full post.
Reply
#22

[quote name='Greimann' date='Jul 11 2005, 07:29 PM']That chart on page 46 of the article spells it all out. Saves me the effort to test!  <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />  The article also is consistent with common cam timing technology.



Good find. I am sure I have looked at that once long ago, but there is just too much out there to remember.

[right][post="7236"]<{POST_SNAPBACK}>[/post][/right][/quote]



I read the article. Very informative. Some of the charts were too fuzzy for me to read all the lines. In chart on the top-left of page 46, I assume that the "Specific work (kJ/dm**3) is the engine load. What sensors in the engine give the Motronic brain the information for calculating this?



Back on the empirical side of things, I unplugged the electric connector to the Variocan and did some seat of the pants analysis. I would get the car in second gear rolling past a start point at about 1200 RPM. I then floored it and judged the acceleration and marked how far I had travelled by the time I hit 4000 RPM. I did this with and without the Variocam plugged in.



There was a difference, but not as much as I would have expected. And I may have only been wanting there to be a difference. This gets me to my real question which is how to diagnose whether the Variocam is being switched on properly, and if it is, then is the cam moving as much as it is supposed to.



My friend has a fairly cheap custom computer monitor in his souped up Honda Del Sol. With that he can see all kinds of data going to the engines brain, and make alternate decisions. Make me jealous (but only of his little computer.)
Partial Post: Please Login or Register to read the full post.
Reply
#23

[quote name='LivingDust' date='Jul 12 2005, 09:39 PM']I read the article.  Very informative.  Some of the charts were too fuzzy for me to read all the lines.  In chart on the top-left of page 46, I assume that the "Specific work (kJ/dm**3) is the engine load.  What sensors in the engine give the Motronic brain the information for calculating this?

[right][post="7304"]<{POST_SNAPBACK}>[/post][/right][/quote]



The computer senses RPM, oil temperature and engine load, which I assume it is looking at the throttle position sensor for throttle angle, too see how far your foot is in it.



Since these cars carry only OBD-I level of computing power, there is no capability of tapping into the system and watching the data streams. Variocam problems would be the last thing I would be concerned about iin troubleshooting your stumble. Now that the basic unplug diagnostic has been done, look for other things.
Partial Post: Please Login or Register to read the full post.
Reply


Possibly Related Threads…
Thread / Author Replies Views Last Post
Last Post by flash
05-06-2009, 01:29 PM
Last Post by Renalicious
04-19-2007, 11:24 PM
Last Post by happysails2you
04-10-2007, 10:56 PM
Last Post by danderson
06-21-2006, 11:50 PM
Last Post by Harvey
06-01-2006, 09:25 AM
Last Post by Greimann
02-07-2006, 11:33 PM
Last Post by jaap
11-03-2005, 05:21 AM

Forum Jump:


Users browsing this thread: 1 Guest(s)