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750 Holley D/P. which jets do I use, now that Im at sea
#312541
05/09/09 10:38 AM
05/09/09 10:38 AM
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Joined: Feb 2006
Posts: 188
Murrayville, Illinois, usa
scotts66charger
OP
member
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OP
member
Joined: Feb 2006
Posts: 188
Murrayville, Illinois, usa
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I have a built 440, that I am using a Holley 750 D/P. I had everything setup just right when i lived in Oregon state. The elevation there was 4000 feet above sea level. I have since move to flatland ( Illinois) and the elevation is is aprox 250 above sea level. A difference of 3750 feet. The car now runs BAD! I asked you all about it, and was told that it will need to be Re-jetted to the lower altitude. Ok , sounds good to me, but now my question is, what jet size do I need to install. Im not sure what jets are in it now, but they worked very well at the higher elevation.I guess I need to install smaller jets??? Help.... thanx in advance. scott 
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Re: 750 Holley D/P. which jets do I use, now that Im at sea
[Re: scotts66charger]
#312542
05/09/09 11:52 AM
05/09/09 11:52 AM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Scott just keeping it simple you might go 2 sizes smaller all the way around from whatever sizes you find you have in there when you pull the bowls & see how that affects it & go from there.
live every 24 hour block of time like it's your last day on earth
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Re: 750 Holley D/P. which jets do I use, now that Im at
[Re: RapidRobert]
#312543
05/09/09 12:05 PM
05/09/09 12:05 PM
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Joined: Jul 2006
Posts: 4,179
California
mickm
master
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master
Joined: Jul 2006
Posts: 4,179
California
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Quote:
Scott just keeping it simple you might go 2 sizes smaller all the way around from whatever sizes you find you have in there when you pull the bowls & see how that affects it & go from there.
it's a step by step process, as stated above. start there, and keep going until it looks/smells/feels like you have gone too lean, and then go back a step rich again.
you should see results immediately just by going the 2 sizes as sated above...
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Re: 750 Holley D/P. which jets do I use, now that Im at sea
[Re: ToddP]
#312545
05/09/09 01:34 PM
05/09/09 01:34 PM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
You will need larger jets.
 Higher attitude you lean it down, lower attitude you fatten it up...Timing will need tweaking too...
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