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Author Topic: DCNF Problem. Please Help!  (Read 2207 times)
Fasterbrit
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Posts: 1009


OFF#23 - The Fastest Outlaw in the West!
« on: May 22, 2008, 21:50:42 pm »
Hey all. Got a problem with a pair of 40 DCNFs on a 1641. Fuel keeps pumping through the accelerator pump jets at 1500 rpm and above. It seems to spurt with the pulses of the engine. Pump diaphrams are fine. However, there aren't any ball bearings or springs in the accelerator pump jet feed orifices. I have checked the Weber manual exploded diagram and can't see any mention of them. I know Dells and IDFs have them, but should DCNFs?
Please help Huh
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9.563 @ 146.25 mph Cal Look Drag Day, Santa Pod, April 2011
OFF#23 OUTLAW FLAT FOUR www.outlawflatfour.com
www.air-kraft.com
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TomR
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Posts: 98



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« Reply #1 on: May 22, 2008, 23:25:43 pm »
Check the axial play on the mainshaft ....

http://www.cal-look.com/forum/index.php?topic=25992.0
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"The devil is in the details"
Fasterbrit
Hero Member
*****
Posts: 1009


OFF#23 - The Fastest Outlaw in the West!
« Reply #2 on: May 22, 2008, 23:47:04 pm »
Thanks Tom, that's a whole lot of info there. Going to check all those points tomorrow Cool
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9.563 @ 146.25 mph Cal Look Drag Day, Santa Pod, April 2011
OFF#23 OUTLAW FLAT FOUR www.outlawflatfour.com
www.air-kraft.com
www.marcomansiperformance.com
TomR
Jr. Member
**
Posts: 98



WWW
« Reply #3 on: May 23, 2008, 00:41:07 am »
Been there - done that - Cheesy

Best regards
Tom R Berg
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"The devil is in the details"
Fasterbrit
Hero Member
*****
Posts: 1009


OFF#23 - The Fastest Outlaw in the West!
« Reply #4 on: May 29, 2008, 06:15:50 am »
You were totally right Tom - adjusted the axial play on the mainshafts and no more fuel pulsing through the pump jets Cool

Big thanks!
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9.563 @ 146.25 mph Cal Look Drag Day, Santa Pod, April 2011
OFF#23 OUTLAW FLAT FOUR www.outlawflatfour.com
www.air-kraft.com
www.marcomansiperformance.com
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