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Shop Talk
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http://www.clubcobra.com/forums/shop-talk/)
| vector1 |
09-03-2009 05:07 PM |
afr change from flat base to drop base filter
had something interesting happen when i changed from flat base filter to drop base. was trying to increase my field of view so thought i would try drop base filter. same size filter 4" x 14", same top.
afr at cruise went from 14.5 up to around 16-1. didn't know if something happened at the track or changing to straight through exhaust did this, so i put the flat base back on and the cruise afr returned to normal. the top i didn't think was very close to the carb inlet but it must have disrupted the airflow somewhat. wot didn't appear to change much that i could tell. anyway, definitely had not expected this. looks like the protrusion lives another day.
here's a picture with the flat base, the drop base was 1.5"-2" lower, same filter & top.
http://www.clubcobra.com/photopost/d...001_Small_.jpg |
| jdean |
09-03-2009 05:17 PM |
So you are back to the "Beyond Thunderdome" theme for a while :)
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| vector1 |
09-03-2009 06:47 PM |
lol, haven't come up with a better one yet.
what's the word on your car? any pics of the scoop?
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| jdean |
09-03-2009 07:59 PM |
Hope to have some pics by tomorrow....if so I will post them here.
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| danc30 |
09-04-2009 11:30 AM |
I would keep the drop base. Going from 14.5 to 16 means you are getting more air, better airflow. Not sure if you have a carb or FI, but I would richen it up either way.
I think this is an accurate assumption.
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| vector1 |
09-04-2009 03:22 PM |
i hadn't thought of it that way. i figured it was a disruption of the airflow through the carb. thnx.
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| jdean |
09-04-2009 06:29 PM |
Makes sense to me. If AFR went richer it would mean less air getting through.
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