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| Randal |
 May 20 2009, 07:21 PM
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#1
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Advanced Member  Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750  |
Does anyone have a altitude chart that shows which jets you should use? |
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| 914forme |
May 22 2009, 07:05 AM
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#2
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None 
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Truth be told it changes.
Compression ratio, cam, exhaust system, and air filter stacks, the hight of your velocity stacks, are all in the mix. Then you take the things outside of your control altitude, barometric pressures, temp, humidity, fuel quality. Running EFI is easy, running carbs correctly takes a magician, scientist, and alchemist. I am sure it is documented in one of he many weber books I have some where, but fuel quality has changes since most of these where written. So it would be ball park anyway. Advantage of asking Jake, is he has the info on customer engines he has sent out there, and then any tuning that was required afterward if the customer told him. Much better than us just rolling the dice and saying the chart says this. the only other answer I have is toss it on a dyno and work out the bugs. |
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| Randal |
May 22 2009, 09:16 AM
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#3
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
QUOTE(914forme @ May 22 2009, 06:05 AM)  Truth be told it changes. Compression ratio, cam, exhaust system, and air filter stacks, the hight of your velocity stacks, are all in the mix. Then you take the things outside of your control altitude, barometric pressures, temp, humidity, fuel quality. Running EFI is easy, running carbs correctly takes a magician, scientist, and alchemist. I am sure it is documented in one of he many weber books I have some where, but fuel quality has changes since most of these where written. So it would be ball park anyway. Advantage of asking Jake, is he has the info on customer engines he has sent out there, and then any tuning that was required afterward if the customer told him. Much better than us just rolling the dice and saying the chart says this. the only other answer I have is toss it on a dyno and work out the bugs. We are planning on installing an air fuel gage and sending unit, but just trying to get some baseline jet informatoin before the project starts. |
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Posts in this topic
Randal Weber May 20 2009, 07:21 PM
914forme
Does anyone have a altitude chart that shows whic... May 20 2009, 10:11 PM Randal What no one knows which jets to use for different ... May 21 2009, 10:54 PM
J P Stein Going to the Parade, Randal? May 22 2009, 09:21 AM 914forme So Sisyphus, I have said it once I will say it aga... May 22 2009, 02:23 PM
914forme Better late than never, sorry for the delay.
0-50... May 24 2009, 01:53 PM |
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