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| Holley 1920 1 9/16 Bore https://slantsix.org/forum/viewtopic.php?t=57219 |
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| Author: | mopar01 [ Thu Mar 05, 2015 3:30 pm ] |
| Post subject: | Holley 1920 1 9/16 Bore |
Well I bought a good used 1920 off ebay and its the smaller 1920. Problem is the throttle shaft seems to be tighter than my other 1920 that is the larger bore. The truck is a 78 d100 3.55 gears with the 4 speed od. I have a 1945 on it now but can really tell he diffirence with the 1920. So how much would I be losing by running the smaller carb. The engine is 72 225 out of a auto dart. |
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| Author: | Reed [ Thu Mar 05, 2015 4:02 pm ] |
| Post subject: | Re: Holley 1920 1 9/16 Bore |
Quote: Problem is the throttle shaft seems to be tighter than my other 1920 that is the larger bore.
What do you mean by tighter? In what way is it a problem?Quote: I have a 1945 on it now but can really tell he diffirence with the 1920.
Good difference? Bad difference? Difference in what? Quote: So how much would I be losing by running the smaller carb. The engine is 72 225 out of a auto dart.
How much what would you be losing? CFM? Performance? Fuel consumption?
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| Author: | mopar01 [ Thu Mar 05, 2015 4:20 pm ] |
| Post subject: | |
Tighter is a good thing I was being scarcastic.  Good diffirence as in it feels like I picked two cylinders. And yes mpg , performance. Iv found on here the cfm diffirence is 75 which seems like quite a bit but have found diffirent asnwers on the web.
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| Author: | SlantSixDan [ Thu Mar 05, 2015 4:53 pm ] |
| Post subject: | |
A Holley 1920 (of any description) isn't really an appropriate carburetor choice for a '78, anyhow. |
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| Author: | mopar01 [ Thu Mar 05, 2015 5:08 pm ] |
| Post subject: | |
The engine is out of a 72 dart. Are the metering blocks the same? Besides the throttle plate are the parts the same? |
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| Author: | SlantSixDan [ Thu Mar 05, 2015 7:44 pm ] |
| Post subject: | |
Quote: The engine is out of a 72 dart.
The truck's a '78.  Quote: Are the metering blocks the same?
No.Quote: Besides the throttle plate are the parts the same?
No, the casting itself is different. Not just for the throttle bore size, either; the venturi sizes are different.
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| Author: | mopar01 [ Fri Mar 06, 2015 3:15 am ] |
| Post subject: | |
Ah ok, thank you dan. |
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