The Ford Barn

Pech33 · 02-04-2022, 11:48 AM

I put Red's Headers on my 40 Convertible, Smithy Mufflers with 2" inlets and outlets. Do I go with 2" exhaust pipes or 1 3/4"?

Zeke3 · 02-04-2022, 11:56 AM

1 3/4” O.D. Would be plenty big enough.

flatjack9 · 02-04-2022, 11:58 AM

1 3/4"

Jack E/NJ · 02-04-2022, 12:37 PM

Straight pipes are where it's at. Even smaller diameters are fine and help tame the bark too. 8^)

51 MERC-CT · 02-04-2022, 12:47 PM

If you are using Smithy's then then you will have to use adapters and extra clamps for 1 3/4" T-pipes. Go with the 2" (no big difference in sound)

34PKUP · 02-04-2022, 02:27 PM

Sponsored Links (Register now to hide all advertisements)

Why would anyone install less restrictive headers and then install more restrictive tailpipes?

Krylon32 · 02-04-2022, 02:30 PM

I always do 2 inch. Sometimes with and sometimes without mufflers, depends on the car.

jrvariel48 · 02-04-2022, 03:18 PM

2" all the way for me

Kube · 02-04-2022, 05:19 PM

Quote:

Originally Posted by 34PKUP

Why would anyone install less restrictive headers and then install more restrictive tailpipes?

Restrictive on a stock flathead? Hilarious.

36rgtop · 02-04-2022, 05:30 PM

Quote:

Originally Posted by Kube

Restrictive on a stock flathead? Hilarious.

Ya' probably just as hilarious as installing Reds headers or any other aftermarket headers along with the mufflers.

Fred A · 02-04-2022, 05:32 PM

Before Burbank went Stop Sign Crazy there was a steep hill that was locally used to test performance. We made up our own rules to suit the car. It is a real-world test or was. We then enjoyed a glimpse into the performance mythology that clouded the Hot Rod Minds of the era. JWL blew the doors off of so many lies and damn lies. Fred A

Kube · 02-04-2022, 06:20 PM

Quote:

Originally Posted by 36rgtop

Ya' probably just as hilarious as installing Reds headers or any other aftermarket headers along with the mufflers.

Well, yes, I agree. 99% of the time, it's for appearance and sound. Certainly not enhanced performance.

Ol' Ron · 02-04-2022, 09:56 PM

In JWL's Book "Flathead facts" He has allot to say about the flathead exhaust and any modifications you might want to make to it and the results. Great information.
Gramps

Tinker · 02-05-2022, 01:21 AM

Dual 1.75 will give you a nice crackle without that 2" overkill drone sound. Won't worry about getting more flow for "performance".

danliveshere · 02-05-2022, 07:17 AM

I managed to fabricate this 2.5” stainless single system into my frame. Sounds really good with my little 35 engine. I chose a single system so I can keep my battery under the floor. I also fabricated the headers in ss.

Ken Henry · 02-05-2022, 08:43 AM

My Smithies only lasted a few years but did have a nice mellow sound. Brock mans have been on much longer and still seem very solid

flatford8 · 02-05-2022, 10:55 AM

Quote:

Originally Posted by Ken Henry

My Smithies only lasted a few years but did have a nice mellow sound. Brock mans have been on much longer and still seem very solid

I went with Brockmans and 1 3/4 pipes. Stock type dual manifolds………. Mark
It takes up less room in the garage when I park it like this !!

ssffnomad · 02-05-2022, 11:41 AM

Red’s with no mufflers, 1 3/4” pipe . 🤓

36coupe · 02-05-2022, 12:34 PM

Where not the original single exhaust on a 36 - 38 1-5/8 or 1-1/2”?

aussie merc · 02-05-2022, 07:15 PM

the original tail pipe was 11/2" single so 2 x 1 3/4" flows a lot more what a lot of people forget is heat heat greatly effects volume so the further you get away from the engine the less pipe you need so unless youve got an absolute monster or a flathead i dont think its going to have much of an effect

02-04-2022, 11:48 AM	#1
Pech33 Senior Member Join Date: Jun 2021 Location: Mukilteo, WA; Rio Verde, AZ Posts: 163	What Size Tailpipes I put Red's Headers on my 40 Convertible, Smithy Mufflers with 2" inlets and outlets. Do I go with 2" exhaust pipes or 1 3/4"?

02-04-2022, 11:56 AM	#2
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,407	Re: What Size Tailpipes 1 3/4” O.D. Would be plenty big enough.

02-04-2022, 11:58 AM	#3
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,527	Re: What Size Tailpipes 1 3/4"

02-04-2022, 12:37 PM	#4
Jack E/NJ Senior Member Join Date: May 2010 Posts: 2,173	Re: What Size Tailpipes Straight pipes are where it's at. Even smaller diameters are fine and help tame the bark too. 8^)

02-04-2022, 12:47 PM	#5
51 MERC-CT Senior Member Join Date: May 2010 Location: East Hartford, Ct Posts: 5,898	Re: What Size Tailpipes If you are using Smithy's then then you will have to use adapters and extra clamps for 1 3/4" T-pipes. Go with the 2" (no big difference in sound) __________________ DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES

02-04-2022, 02:27 PM	#6
34PKUP Senior Member Join Date: Feb 2011 Posts: 794	Re: What Size Tailpipes Sponsored Links (Register now to hide all advertisements) Why would anyone install less restrictive headers and then install more restrictive tailpipes?

02-04-2022, 02:30 PM	#7
Krylon32 Senior Member Join Date: May 2010 Posts: 4,484	Re: What Size Tailpipes I always do 2 inch. Sometimes with and sometimes without mufflers, depends on the car.

02-04-2022, 03:18 PM	#8
jrvariel48 Senior Member Join Date: Jan 2012 Location: New Jersey Posts: 1,427	Re: What Size Tailpipes 2" all the way for me

02-04-2022, 05:32 PM	#11
Fred A Senior Member Join Date: May 2010 Location: Encino California, near Burbank Posts: 935	Re: What Size Tailpipes Before Burbank went Stop Sign Crazy there was a steep hill that was locally used to test performance. We made up our own rules to suit the car. It is a real-world test or was. We then enjoyed a glimpse into the performance mythology that clouded the Hot Rod Minds of the era. JWL blew the doors off of so many lies and damn lies. Fred A

02-04-2022, 09:56 PM	#13
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: What Size Tailpipes In JWL's Book "Flathead facts" He has allot to say about the flathead exhaust and any modifications you might want to make to it and the results. Great information. Gramps

02-05-2022, 01:21 AM	#14
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,053	Re: What Size Tailpipes Dual 1.75 will give you a nice crackle without that 2" overkill drone sound. Won't worry about getting more flow for "performance".

02-05-2022, 08:43 AM	#16
Ken Henry Senior Member Join Date: Jul 2010 Location: Rochester, NY Posts: 266	Re: What Size Tailpipes My Smithies only lasted a few years but did have a nice mellow sound. Brock mans have been on much longer and still seem very solid

02-05-2022, 11:41 AM	#18
ssffnomad Senior Member Join Date: Aug 2021 Location: Upstate N.Y. Posts: 443	Re: What Size Tailpipes Red’s with no mufflers, 1 3/4” pipe . 🤓

02-05-2022, 12:34 PM	#19
36coupe Senior Member Join Date: Oct 2012 Location: Eastcoast Posts: 864	Re: What Size Tailpipes Where not the original single exhaust on a 36 - 38 1-5/8 or 1-1/2”?

02-05-2022, 07:15 PM	#20
aussie merc Senior Member Join Date: Sep 2016 Location: sydney australia Posts: 1,034	Re: What Size Tailpipes the original tail pipe was 11/2" single so 2 x 1 3/4" flows a lot more what a lot of people forget is heat heat greatly effects volume so the further you get away from the engine the less pipe you need so unless youve got an absolute monster or a flathead i dont think its going to have much of an effect