Leather accelerator pumps

Ed McLawhorn Jr. · 03-06-2024, 07:07 PM

With the poor quality accelerator pumps currently found in carb kits, will a leather pump hold up with racing gas…renegade 112? 4gc on a super stocker. Thanks.

Ed

Jack McCarthy · 03-06-2024, 10:47 PM

works with c11&12

capt

John Dinkel · 03-08-2024, 03:15 PM

I have run leather for years with no problems.

Lyn Smith · 03-08-2024, 05:50 PM

The trick used to be to soak your leather pump cups in brake fluid to keep them soft, or to soften them up. I use viton pump cups NAPA number 2-4112 in all my carbs .Cost about $7.50 each.

Ed McLawhorn Jr. · 03-08-2024, 10:18 PM

Quote:

Originally Posted by Lyn Smith

The trick used to be to soak your leather pump cups in brake fluid to keep them soft, or to soften them up. I use viton pump cups NAPA number 2-4112 in all my carbs .Cost about $7.50 each.

Thanks Lyn for the Napa part number and leather soap tip.

Coleydog · 03-09-2024, 11:11 PM

I’m thinking the alcohol eats the leather up along with fuel pumps and carbs but with race gas no

Henrys Toy · 03-10-2024, 09:05 AM

Quote:

Originally Posted by Ed McLawhorn Jr.

With the poor quality accelerator pumps currently found in carb kits, will a leather pump hold up with racing gas…renegade 112? 4gc on a super stocker. Thanks.

Ed

Good morning Ed and to all,
Does the 4 GC use the same size pump as the Rochester 2 Barrel or is it the Dia. of the Q-Jet pump?
Its been years since I've been inside one of those carbs.
Have a Good Day.

Respectfully,
Henry Kunz 1534 H/SA

SSDiv6 · 03-10-2024, 11:19 AM

All racing fuels contain Triethylamine.
They will kill the leather and even the Viton cups that usually come in the carb kits sold at auto parts stores.

I recommend the use of cups sold by companies such as Quadarjet Power, Quadrajet Parts, and others. They sell cups that are resistant to the new generation of fuels and are made from either Butyl, EPDM, Neoprene, or Hypalon rubber.

Ed McLawhorn Jr. · 03-10-2024, 11:55 AM

Quote:

Originally Posted by Henrys Toy

Good morning Ed and to all,
Does the 4 GC use the same size pump as the Rochester 2 Barrel or is it the Dia. of the Q-Jet pump?
Its been years since I've been inside one of those carbs.
Have a Good Day.

Respectfully,
Henry Kunz 1534 H/SA

Henry, the 4gc has a couple different sizes. The one I’m running (1966, 283/233hp) is 21/32” cup and the “long stem” pump. I’m not sure about the 2 barrel carb.

monte385 · 03-10-2024, 03:30 PM

Not pitching for Cliff but he says his are alcohol proof.

03-06-2024, 07:07 PM	#1
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 287 Likes: 3 Liked 16 Times in 14 Posts	Leather accelerator pumps With the poor quality accelerator pumps currently found in carb kits, will a leather pump hold up with racing gas…renegade 112? 4gc on a super stocker. Thanks. Ed

03-06-2024, 10:47 PM	#2
Jack McCarthy VIP Member Join Date: Feb 2002 Location: lyndon ky. ... louisville area Posts: 1,284 Likes: 22 Liked 352 Times in 92 Posts	Re: Leather accelerator pumps works with c11&12 capt __________________ Jack McCarthy 3609 STK "the Captain"

03-08-2024, 03:15 PM	#3
John Dinkel Senior Member Join Date: Nov 2005 Location: Pinckney, Michigan Posts: 500 Likes: 352 Liked 233 Times in 62 Posts	Re: Leather accelerator pumps I have run leather for years with no problems. __________________ John Dinkel 3295 STK

03-08-2024, 05:50 PM	#4
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,121 Likes: 217 Liked 841 Times in 156 Posts	Re: Leather accelerator pumps The trick used to be to soak your leather pump cups in brake fluid to keep them soft, or to soften them up. I use viton pump cups NAPA number 2-4112 in all my carbs .Cost about $7.50 each.

03-09-2024, 11:11 PM	#6
Coleydog Senior Member Join Date: Jul 2014 Posts: 562 Likes: 33 Liked 47 Times in 32 Posts	Re: Leather accelerator pumps I’m thinking the alcohol eats the leather up along with fuel pumps and carbs but with race gas no

03-10-2024, 11:19 AM	#8
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,991 Likes: 693 Liked 1,457 Times in 543 Posts	Re: Leather accelerator pumps All racing fuels contain Triethylamine. They will kill the leather and even the Viton cups that usually come in the carb kits sold at auto parts stores. I recommend the use of cups sold by companies such as Quadarjet Power, Quadrajet Parts, and others. They sell cups that are resistant to the new generation of fuels and are made from either Butyl, EPDM, Neoprene, or Hypalon rubber.

03-10-2024, 03:30 PM	#10
monte385 Junior Member Join Date: Oct 2015 Posts: 51 Likes: 33 Liked 17 Times in 14 Posts	Re: Leather accelerator pumps Not pitching for Cliff but he says his are alcohol proof.