Modified carb question

Jim Hawkins · 12-22-2018, 11:22 PM

I think this has been discussed before but can you run a single carb in modified? For example if you had a SS/BS car with the 750 carb and wanted to run SS/CM can you run the same 750 carb or any single carb? Or is it 2 carbs only in SS/CM?

al wisniewski · 12-25-2018, 06:47 PM

Jim,I've seen guys just run a big carb in the modified classes.Probably if it is on the list of accepted carbs,it is legal.

FireSale · 12-25-2018, 09:43 PM

There is more information in the carb section of the Accepted Products Guide. The copy I have on hand is 2017, so check the current one. SS/AM-EM are listed under American Production 4-Barrels and just says "In line/Three Prohibited". The notes for that section are below. Sounds like CM can use anything on the whole list up through 850. With three prohibited sounds like two is OK but no six packs.

I'm no tech but I hope this helps.
______________________________________________
American Production 4-Barrel Carbs
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******EDITED*******
Any of the accepted 600, 750, or 850 CFM carburetors listed above may also be used in these classes. For these applications the throttle bore, venturi, throttle shaft and plate dimensions listed apply for these carburetors only.
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Any carburetor manufacturer represented in the NHRA Blueprint Bulletins; i.e. Holley, Carter, Rochester, Autolite, Ford, Straumberg, etc. is accepted.
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Any carburetors produced by an accepted manufacturer plus the specific carburetors listed below.
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For any accepted carburetor not specifically listed (or noted) any size throttle bores and venturis as produced are permitted; no size limits apply but no modifications from the as produced throttle bore and venturi dimensions are permitted.
*********EDITED*******************

12-22-2018, 11:22 PM	#1
Jim Hawkins Member Join Date: Jan 2010 Posts: 186 Likes: 82 Liked 109 Times in 32 Posts	Modified carb question I think this has been discussed before but can you run a single carb in modified? For example if you had a SS/BS car with the 750 carb and wanted to run SS/CM can you run the same 750 carb or any single carb? Or is it 2 carbs only in SS/CM?

12-25-2018, 06:47 PM	#2
al wisniewski Junior Member Join Date: Nov 2003 Location: auburn,mi. Posts: 56 Likes: 1 Liked 0 Times in 0 Posts	Re: Modified carb question Jim,I've seen guys just run a big carb in the modified classes.Probably if it is on the list of accepted carbs,it is legal.

12-25-2018, 09:43 PM	#3
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 236 Times in 127 Posts	Re: Modified carb question There is more information in the carb section of the Accepted Products Guide. The copy I have on hand is 2017, so check the current one. SS/AM-EM are listed under American Production 4-Barrels and just says "In line/Three Prohibited". The notes for that section are below. Sounds like CM can use anything on the whole list up through 850. With three prohibited sounds like two is OK but no six packs. I'm no tech but I hope this helps. ______________________________________________ American Production 4-Barrel Carbs - ****EDITED*** Any of the accepted 600, 750, or 850 CFM carburetors listed above may also be used in these classes. For these applications the throttle bore, venturi, throttle shaft and plate dimensions listed apply for these carburetors only. - Any carburetor manufacturer represented in the NHRA Blueprint Bulletins; i.e. Holley, Carter, Rochester, Autolite, Ford, Straumberg, etc. is accepted. - Any carburetors produced by an accepted manufacturer plus the specific carburetors listed below. - For any accepted carburetor not specifically listed (or noted) any size throttle bores and venturis as produced are permitted; no size limits apply but no modifications from the as produced throttle bore and venturi dimensions are permitted. *****EDITED***************** __________________ Dale Shearon 68 Mustang 6394