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440 pig rich on methanol #953373
03/18/11 10:53 PM
03/18/11 10:53 PM
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michigan
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sturmenater Offline OP
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440 .040 over 12:1 compression mopar .590 cam installed at 102 centerline.
The carb is a 1000cfm 4150 holley. I set the floats at idle seems ok probaly rich there to. I have 6psi fuel pressure on the gauge on fuel log.
Jetted down all the way to 132 smallest alohol jets i have still rich.
Its so rich it ran best when i completly removed front acelorater pump cam.
Going to hook up the vacum gage tommorow and check the power valves to make sure there not blown plus i dont remeber what I put in when i rebuilt it.

Anyone want to take a quess and help me out as to what else to check.
Thanks

Re: 440 pig rich on methanol [Re: sturmenater] #953374
03/18/11 10:56 PM
03/18/11 10:56 PM
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sturmenater Offline OP
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also I went from .45 nozzles to .25 trying to choke down the fuel amount.
I dont think the problem is their.
When running and i crack the throttle up at the carb there is a metric F ton fuel coming in before they even start squirting

Re: 440 pig rich on methanol [Re: sturmenater] #953375
03/19/11 08:29 AM
03/19/11 08:29 AM
Joined: Nov 2009
Posts: 255
michigan
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sturmenater Offline OP
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anyone

Re: 440 pig rich on methanol [Re: sturmenater] #953376
03/19/11 08:57 AM
03/19/11 08:57 AM
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Posts: 25,973
United Socialist States of Ame...
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tboomer Offline
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You want this moved to the race section? I assume it is a drag car?


Need your rear end checked out? Contact Grizzly!!
Re: 440 pig rich on methanol [Re: tboomer] #953377
03/19/11 09:52 AM
03/19/11 09:52 AM
Joined: Jul 2008
Posts: 30,460
Florida STAYcation
dOc ! Online penguin-006
The village idiot's idiot
dOc !  Online Penguin-006
The village idiot's idiot

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Posts: 30,460
Florida STAYcation
I am no alky Xpert ... but pig-rich with a Berry Crab ? ....PERISH that thought !

Are you sure you put the jets in that crab ? ... it would take A LOT of over-jetting to do what you suggest ...seriously ....

Re: 440 pig rich on methanol [Re: dOc !] #953378
03/19/11 06:00 PM
03/19/11 06:00 PM
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Posts: 255
michigan
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sturmenater Offline OP
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I put power valve plugs in and ckecked and cleaned the air bleeds put the acelorater cam back on problem solved.

Re: 440 pig rich on methanol [Re: sturmenater] #953379
03/20/11 03:21 AM
03/20/11 03:21 AM
Joined: Apr 2008
Posts: 80
ohio
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flynbyu Offline
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ohio
I would say throw the power valves away..You could have bad needle and seats or a bad oring on the needle,cracked float taking on fuel after it runs for a bit.I think that carb is probably a little big for that engine combo. For some kind of reference I run 168 jets in my APD 950 on a .030 440 13.5;1 with a .635 lift cam.

Last edited by flynbyu; 03/20/11 03:24 AM.






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