Holley 4160: Primary Jet Size??


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By Hogan - 14 Years Ago

I am a new member here, but would like help with my "new" 1957 Ford Fairlane (292??/Fordomatic/B intake).  My car has a Holley 4160 carb (1850-3' 600 cfm) and I would like to know what primary jet I should be running.  The carb seems to be running really rich (tailpipes black; plugs black).  According to my 1957 Ford Car & Thunderbird Show Manual the stock 4150 carb had 55 primary jets, 48 secondary jets, and a 6.5 power valve.  Any information would be appreciated.
 
Lance
By speedpro56 - 14 Years Ago
unlike the the 600 cfms you have now the original was alot smaller 410 cfms which accounts for the smaller jets. If your 292 is stock then the 600 in my opinion is too large for your engine. You can try taking the primary jets down four numbers and see if that helps, a stumble may occur from being alittle lean on the accellerating shot but you won't know until you try.
By pegleg - 14 Years Ago
Start by asking Holley (online site) what the original jets were for the list number of the Carb. yours is an 1850-3. This will be different than the original '57 Carb which was much smaller (less cfm, smaller venturii's). Make certain the floats are set correctly while you're at it, to high will make it rich.  
By Hogan - 14 Years Ago
Guys, thanks for the quick reply!

I will contact Holley to see what the original jets were for my 1850-3.

Also, I have checked the floats and I have a little dribble of fuel out the bottom of the sight hole which I heard was right on.

Thanks again.

Hogan

By Richard Palmer - 14 Years Ago
I agree with Lance-----The 600 cfm carb is too big/rich for your motor. I had a similar problem with my 312 inch "57 T'bird even with a 60 thou overbore and an Iskenderian cam. Tried several smaller jets and power valve combinations but could not get rid of "running rich". I too had black exhaust and black spark plugs. Problem solved by going to Holley's 390 cfm carb-works for me plus it has an electric choke which I wanted. Understand Holley now has a 465 cfm (I think) carb which might also be a good choice for you. I also contacted Hollley's Technical help line but did not find them to be helpful.Suggest you do a "search" on this forum to find what Ted Eaton has to say on this subject. The man is a genius on everything!. Cheers, Dick Palmer
By Richard Palmer - 14 Years Ago
Lance----Meant to say I agree with Gary!! now that I have reread my post...Dick Palmer
By oldcarmark - 14 Years Ago
Actually the 465 was available before the 390.The 465 is a close replacement for the original 57 Holley supplied from the factory.It has a hot air choke requiring a pipe to heat up the choke coil.Either the 390 or 465 is a good choice.The 390 has the electric choke as noted.It will also require bigger primary jets as the factory ones are basically small  51 jets.You need at least 56 to start off with and see how they work.I have the 390 on my stock motor and after a little tinkering with the jets,changing the inlet needles to steel,and playing with the float level a little works great.Like night and day from the original Teapot.I did use a "B" manifold and later style distributor which you MUST change at the same time.My friend went with the 465 on a stock 292.Worked great out of the box.No jet change.There are other good options as well.Others will offer their opinions I am sure.The 465 is a 1848 model and the 390 is a 8007.
By Ted - 14 Years Ago

Here are a couple of past threads on the 600 Holley jet size subject.  Doing a search will yield some others.

http://www.y-blocksforever.com/forums/Topic13316-3-2.aspx

http://www.y-blocksforever.com/forums/Topic51072-3-1.aspx

By GREENBIRD56 - 14 Years Ago
Hogan - I didn't see that you had actually looked under the carb yet - but the throttles on the 600's are not a good fit for the holes in a standard "B" manifold. In fact - its usually required to make an adapter as such out of a thermal spacer. Otherwise you end  up with some ugly stuff under the primary throttle blades.

Further than that...some grinding will open the holes up to match the carb.............

I've forgotten who sent this photo in - but it's got the grinding done to fit the bigger throttles. just stacking gaskets will let the blades swing - but it won't work too well.