The Ford Barn

1931flathead · 08-05-2016, 05:24 PM

I'm going run 4 Stromberg 48 carbs on my 471 blower what would be a good jet size to start with it will be straight linkage 293 flathead

JWL · 08-06-2016, 09:03 AM

Start at around 52-54 and go with bigger PV also. Avoid being too lean. Better to back off slightly after testing than discovering a expensive problem while trying to get big enough. There is a very wide range of A/F mixtures where the engine will run. As you get closer to semi-perfect it becomes more and more difficult to determine which way to go without measurements. Better a little rich for safety. Some of where to establish the jetting is influenced by how the engine is to be used. It will be different for maximum competition performance than for cruising around on the street.

1931flathead · 08-06-2016, 10:59 AM

OK thanks will do

Andy · 08-06-2016, 12:34 PM

Get an air/fuel meter.

1931flathead · 08-06-2016, 01:05 PM

Are you talking about the ones you run in the exhaust

1931flathead · 08-06-2016, 05:19 PM

Sponsored Links (Register now to hide all advertisements)

looks like I have to go to a Stromberg dealer to get them thanks

uncle max · 08-06-2016, 05:58 PM

Quote:

Originally Posted by 1931flathead

looks like I have to go to a Stromberg dealer to get them thanks

Knock knock...

1931flathead · 08-06-2016, 06:04 PM

yea sir

1931flathead · 08-12-2016, 09:20 PM

how much bigger on the pv would you think to go

JWL · 08-13-2016, 06:29 AM

The power valve size is ass-backward from the main jets. The smaller numbers indicate LARGER orifice sizes. Something in the 50's size range is where I would start.

Charlie ny · 08-13-2016, 08:26 AM

31,
I seem to remember some guy in Utah who actually attends Bonnevile and
real world sets up Strombergs on site........Uncle somebody........might be Uncle
Max, 801 301 6114 .......801 583 6169........and that's no jive.
Charlie ny

1931flathead · 08-13-2016, 11:45 AM

thanks for all of your help JWL I will have a place to start from

JM 35 Sedan · 08-13-2016, 12:31 PM

Quote:

Originally Posted by 1931flathead

thanks for all of your help JWL I will have a place to start from

JWL always has good advice and Uncle Max can take care of your needs and offer good advice as well.

1931flathead · 08-13-2016, 12:34 PM

sent couple pm to max and never herd back yet

08-05-2016, 05:24 PM	#1
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	stromberg 48 carb help I'm going run 4 Stromberg 48 carbs on my 471 blower what would be a good jet size to start with it will be straight linkage 293 flathead

08-06-2016, 09:03 AM	#2
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: stromberg 48 carb help Start at around 52-54 and go with bigger PV also. Avoid being too lean. Better to back off slightly after testing than discovering a expensive problem while trying to get big enough. There is a very wide range of A/F mixtures where the engine will run. As you get closer to semi-perfect it becomes more and more difficult to determine which way to go without measurements. Better a little rich for safety. Some of where to establish the jetting is influenced by how the engine is to be used. It will be different for maximum competition performance than for cruising around on the street.

08-06-2016, 10:59 AM	#3
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help OK thanks will do

08-06-2016, 12:34 PM	#4
Andy Senior Member Join Date: May 2010 Location: Kerrville, Tx Posts: 2,771	Re: stromberg 48 carb help Get an air/fuel meter.

08-06-2016, 01:05 PM	#5
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help Are you talking about the ones you run in the exhaust

08-06-2016, 05:19 PM	#6
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help Sponsored Links (Register now to hide all advertisements) looks like I have to go to a Stromberg dealer to get them thanks

08-06-2016, 06:04 PM	#8
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help yea sir

08-12-2016, 09:20 PM	#9
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help how much bigger on the pv would you think to go

08-13-2016, 06:29 AM	#10
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: stromberg 48 carb help The power valve size is ass-backward from the main jets. The smaller numbers indicate LARGER orifice sizes. Something in the 50's size range is where I would start.

08-13-2016, 08:26 AM	#11
Charlie ny BANNED Join Date: May 2010 Posts: 3,019	Re: stromberg 48 carb help 31, I seem to remember some guy in Utah who actually attends Bonnevile and real world sets up Strombergs on site........Uncle somebody........might be Uncle Max, 801 301 6114 .......801 583 6169........and that's no jive. Charlie ny Last edited by Charlie ny; 08-13-2016 at 08:29 AM. Reason: aded space bet ph#'s

08-13-2016, 11:45 AM	#12
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help thanks for all of your help JWL I will have a place to start from

08-13-2016, 12:34 PM	#14
1931flathead Senior Member Join Date: Feb 2016 Location: central minn Posts: 1,025	Re: stromberg 48 carb help sent couple pm to max and never herd back yet