Correct jet size on Holley
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=31226
Printed Date: October-08-2024 at 7:21pm
Topic: Correct jet size on Holley
Posted By: sam57
Subject: Correct jet size on Holley
Date Posted: August-16-2013 at 6:41pm
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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 |
Replies:
Posted By: Bri892001
Date Posted: August-16-2013 at 7:19pm
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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. |
Posted By: Gary S
Date Posted: August-16-2013 at 11:39pm
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+1 and they can tell you what jets are supposed to be in there maybe someone changed them at one time ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: ultrahots
Date Posted: August-16-2013 at 11:43pm
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Put up the number as I have a TON of Holley parts guides here. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=6960&sort=&pagenum=2&yrstart=1986&yrend=1990" rel="nofollow - 1980 Show Nautique |
Posted By: boardersdad
Date Posted: August-17-2013 at 12:33am
You mean the putting around and bar hopping? 
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Bri892001 wrote:Posted By: sam57
Date Posted: August-17-2013 at 2:58am
| 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. |
Posted By: E4ODnut
Date Posted: August-29-2013 at 1:50am
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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 |
Posted By: Randy_in_Ohio
Date Posted: August-29-2013 at 5:35pm
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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! ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1602&yrstart=1991&yrend=1995" rel="nofollow - 1993 Sport Nautique |
Posted By: AndrewB
Date Posted: September-15-2013 at 1:57am
I apologize for the same thing but randy have I seen your boat at Berlin? |