IIRC, the extra number on the jet means it's a precision jet. They are actually flowed when made.
I could be totally full of poo too.
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| Jet rcommendation in a Holley 2300 economaster https://slantsix.org/forum/viewtopic.php?t=66730 |
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| Author: | Reed [ Wed Aug 17, 2022 10:56 pm ] |
| Post subject: | Jet rcommendation in a Holley 2300 economaster |
Stock 1976 motor, somewhat tired. In a full size truck with a 727 trans and 3.9 rear gears. Never run stock Holley 2300 economaster carb with reverse idle mixture circuit. Pump cam I believe is red. Power valve is 10.5 Stock jets read 52 and then an upside down 2. I believe these are 52 1/2 jets. 52 jets seem awfully lean for this carb. I recall most people run roughly mid-60s sized jets in the 2300. I am going to try running this carb stock. Anybody have advice about what jets to start with? Or should I just go with the stock 522 jets and see what happens? I will have a wideband O2 sensor installed and functioning before the carb goes on, but I am trying to ballpark it as close as I can pre-installation. |
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| Author: | Dart270 [ Thu Aug 18, 2022 7:18 am ] |
| Post subject: | Re: Jet rcommendation in a Holley 2300 economaster |
My guess is the metering block is different than a standard 2300, for which those jets should not even be close to working. A standard 2300 series 500 carb should run maybe 62 jets at the minimum and more like 64-68, assuming you are anywhere near sea level. I would try it as is and change jets from there. It is obviously set up differently inside than a std 2300 Holley 500 2bbl. If you do not have a wideband O2 sensor, you will save yourself a ton of time and perhaps a fair bit of money by installing one now. The AEM gauges are under $200 and have everything you need and are highly durable and reliable. Lou |
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| Author: | Reed [ Thu Aug 18, 2022 9:52 am ] |
| Post subject: | Re: Jet rcommendation in a Holley 2300 economaster |
Thanks, Lou. I do have a wideband sensor. I just need to weld the sensor bung to the exaust pipe and drill the hiole for the sensor. I will run it as-is first and see how it does. |
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| Author: | slantzilla [ Thu Aug 18, 2022 9:05 pm ] |
| Post subject: | Re: Jet rcommendation in a Holley 2300 economaster |
IIRC, the extra number on the jet means it's a precision jet. They are actually flowed when made. I could be totally full of poo too.
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