Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
02-08-2018, 09:08 PM | #1 |
Registered User
Join Date: Sep 2011
Location: South West
Posts: 431
|
Jet size recomendations please
Hi. I recently bought a Holley Truck Avenger 470CFM for my stock 283. The carb came with size 57 jets in both the Primary and Secondary metering blocks. Through research, I have found that 470cfm might be a little big for my engine, but should be fine if the carb is jetted correctly. I am in the middle of rebuilding the carb and don't want to button it up untill I get a good starting point on the correct jet size for my application. The person I got this from said it was on a 302 and ran great! What you all think about the 57 jet size I have now, would there be a size better suited to start with? Thanks
|
02-08-2018, 10:32 PM | #2 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,510
|
Re: Jet size recomendations please
Bolt it on and go!
Then read your plugs. Where do you live? |
02-08-2018, 10:42 PM | #3 |
Registered User
Join Date: Sep 2011
Location: South West
Posts: 431
|
Re: Jet size recomendations please
Hi, thanks for the reply. I live in the Phoenix area. Does the size of the power valve matter?
|
02-08-2018, 10:48 PM | #4 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,510
|
Re: Jet size recomendations please
Yes!
I see by the specs it’s a 2.5. |
02-08-2018, 10:51 PM | #5 |
Registered User
Join Date: Sep 2011
Location: South West
Posts: 431
|
Re: Jet size recomendations please
Where do you see those numbers? I could not find that on my power valve.
|
02-08-2018, 11:24 PM | #6 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,510
|
Re: Jet size recomendations please
|
02-09-2018, 12:07 AM | #7 |
Registered User
Join Date: Sep 2011
Location: South West
Posts: 431
|
Re: Jet size recomendations please
Hi. I found the numbers on the face and it is a 6.5 power valve. According to the one video I saw, you take your manifold vacuum and devide by two, since mine is a stock engine and manifold and it normally runs around 19inches, does that mean I need the 7.5? Or is the 6.5 good enough?
|
02-09-2018, 12:29 AM | #8 |
Registered User
Join Date: Sep 2011
Location: South West
Posts: 431
|
Re: Jet size recomendations please
Actually it should be bigger than that huh? The largest valve I found a 9.5 on amazon, how's that?
|
02-09-2018, 01:29 AM | #9 | |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,510
|
Re: Jet size recomendations please
Quote:
I’d set it up too factory spec and go from there. I see the 670 gets a 6.5. Maybe the cfm dictates the valve size. |
|
02-10-2018, 10:42 PM | #10 |
Registered User
Join Date: Feb 2015
Location: San Diego, CA
Posts: 409
|
Re: Jet size recomendations please
They make a 10.5 pv. Research how they work and decide from there. Mileage may suffer if you go too high of a #.
__________________
At my worst I'm at my best |
Bookmarks |
|
|