Correct jet size on Holley |
Post Reply |
Author | |
sam57
Senior Member Joined: December-07-2007 Location: North Canton, O Status: Offline Points: 360 |
Post Options
Thanks(0)
Posted: August-16-2013 at 6:41pm |
My 77 Southwind with a 351 PCM with 4 barrel Holley is running too rich and fouling new plugs with black soot after 2 hours of putting around and bar hopping. I'm getting the carb rebuilt and want to make sure it has the correct size jets. Most of my running is putting around at 1000 RPM, what would be the correct jet size?
Thanks, Sam |
|
Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
|
If you get your list number of your choke horn, you can call Holley Tech support, and they should be able to tell you.
Did this start all of a sudden? Thinking your richness could also be a ruptured power valve or a good old fashioned float/needle/seat issue. |
|
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
+1 and they can tell you what jets are supposed to be in there maybe someone changed them at one time
|
|
ultrahots
Gold Member Joined: September-08-2004 Location: United States Status: Offline Points: 618 |
Post Options
Thanks(0)
|
Put up the number as I have a TON of Holley parts guides here.
|
|
boardersdad
Senior Member Joined: June-18-2013 Location: Wisconsin Status: Offline Points: 409 |
Post Options
Thanks(0)
|
You mean the putting around and bar hopping? |
|
sam57
Senior Member Joined: December-07-2007 Location: North Canton, O Status: Offline Points: 360 |
Post Options
Thanks(0)
|
When I bought this Southwind it came with an automotive Holley and ran good, but I won't use a non-marine carb on a boat. I had a marine Holley that came off a Shamrock I used to own that did the same thing plus blew black smoke out the exhaust. I replaced the Shamrock carb with a Edlebrock, put a new power valve on the Holley, and put it on the shelf knowing some day I might need it.
|
|
E4ODnut
Groupie Joined: December-06-2012 Location: Gibsons, BC Can Status: Offline Points: 66 |
Post Options
Thanks(0)
|
My copy of the Holley performance catalogue shows the 4160 vacuum secondary #R80319-1 for the 351 Windsor has having a 122-65 primary main jet, a 125-25 power valve, 1-1/4"diameter primary venturi, 1-5/16" diameter secondary venturi, and 1-9/16" throttle bores.
From my experience, even with factory specs and tuned as good as I can tune, they tend to run rich from off idle to about 2800 RPM. Then they seem pretty good until the power valve opens up when they get overly rich again. This is not a major problem, just hard on fuel. If you are fouling plugs then I suspect s carb tune up is in order. |
|
Robert
1993 Bayliner 3288 "Hocus Pocus" 351 Fords, converted to tuned port programmable EFI |
|
Randy_in_Ohio
Platinum Member Joined: September-13-2006 Location: N. Canton, OH. Status: Offline Points: 1891 |
Post Options
Thanks(0)
|
Hey Sam! sorry for the thread jack... How you been?
I may have to take a ride out to Portage lakes and do some of that puttin around and bar hopping with ya sometime! |
|
AndrewB
Newbie Joined: August-12-2013 Location: Ohio Status: Offline Points: 35 |
Post Options
Thanks(0)
|
I apologize for the same thing but randy have I seen your boat at Berlin? |
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |