Re: Just fired up my new 440 - Holley questions
[Re: 73rrak]
#1172857
02/06/12 03:26 PM
02/06/12 03:26 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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First of all set the floats, upside down and level is indeed a good starting point.
Idle metering screws at 1 1/2 turns out.
Next, your rear jets are WAAY too big. Mid '70s would be more like it. Stock is 76, and most Holleys are set up pretty close out of the box.
then work on timing.
R.
Last edited by dogdays; 02/06/12 03:29 PM.
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Re: Just fired up my new 440 - Holley questions
[Re: dogdays]
#1172858
02/06/12 03:49 PM
02/06/12 03:49 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
First of all set the floats, upside down and level is indeed a good starting point.
Idle metering screws at 1 1/2 turns out.
Next, your rear jets are WAAY too big. Mid '70s would be more like it. Stock is 76, and most Holleys are set up pretty close out of the box.
then work on timing.
R.
I'll go one further, set the floats a tad low... Then turn the mixtures crews in all the way and back out 1.25, start it and run the romps up to 2200 ste your timing in full at 36-38* ley it run for a few minutes, back it down to 800rpm and set you mixtures screws for best vaccuum. Then go out and waffle it...if it stumples you might need to adjust your pump shot or vaccuum springs.
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Re: Just fired up my new 440 - Holley questions
[Re: dogdays]
#1172861
02/06/12 07:14 PM
02/06/12 07:14 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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In my reading on Holly carbs, on a vac carb the rear jetting can vary up to 10 sizes larger than the front if they are changeable. this has worked very well in my apps
I dont run DP carbs but on them the secondary jetting is the same size as the primaries.
of coarse there may be curcumstances where this doesnt apply.
I am truckless..
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Re: Just fired up my new 440 - Holley questions
[Re: 73rrak]
#1172875
02/07/12 09:14 AM
02/07/12 09:14 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Ok I will keep going with this one. I took the valve covers off and all of the intake push tubes are bent and some are completely off the rockers. One is broken I think and is laying down in the valley. What would cause this ?
ouch you bent up your push rods? This would cause your "running like doo doo" problem. A few things can cause this, stuck valves, over-tighten the rocker shafts, to tight of a lash (id you have adjustables), wrong push rods... timing chain issue, wiped cam You said it was running fine before correct?
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