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Scott R's Avatar
 
Join Date: Feb 2001
Location: Aspen CO US
Posts: 16,054
Garage
Another weber question

I did some searching, but it ended in more confusion. I've got my webers idling perfectly, the air correction screws and mixture screws are very responsive, idle CO is about 3.5% according to my Gunson.

Today I set the accelerator pumps using a $1.50 vile from the drugstore, both sides are at 6cc and the car revs fine. The thing I'm curious about is I have what I think is a lot of fuel blowing out of the tops of the stacks when I rev it. I get a pretty good sized amount of fuel at WOT. Is this a sign that my mains are too large?

Idles are 55
ventures are 4.5
air correction is 180
Mains are 140
Tubes are F1

Engine is freshly rebuilt, 964 cams, JE 9.8.2 compression pistons, MSD, magnacores, SSI's.

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2021 Model Y
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
Old 06-27-2009, 05:01 PM
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Navin Johnson
 
TimT's Avatar
 
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,777
No you are seeing reversion...some of the intake charge is getting blown up because of cam overlap etc...

Tall air horns, and tall intermediates were the fixes...

If you ignore what you are seeing... how does the car run?

If it runs well.......
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Old 06-27-2009, 05:43 PM
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Join Date: Feb 2001
Location: Aspen CO US
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Quote:
Originally Posted by TimT View Post
No you are seeing reversion...some of the intake charge is getting blown up because of cam overlap etc...

Tall air horns, and tall intermediates were the fixes...

If you ignore what you are seeing... how does the car run?

If it runs well.......
It runs very well, idles like a top, pulls like a train. In fact I can't imagine why I didn't get rid of the CIS earlier. If it's normal reversion, I'm fine with that.

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2021 Model Y
2005 Cayenne Turbo
2012 Panamera 4S
1980 911 SC
1999 996 Cab
Old 06-27-2009, 07:27 PM
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