Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 04-07-2021, 05:53 PM   #1
RKS.PA
Senior Member
 
RKS.PA's Avatar
 
Join Date: Jun 2010
Location: Marana, AZ
Posts: 1,192
Default Perhaps Another "Dumb" Question

I've blocked off the heat risers on my 59AB and love the "rapping" sound out the tail pipes. I have Red's Headers and Smithy mufflers.

Does blocking the heat risers also cause a chugging type sound under load...almost like an exhaust leak.

I've checked for leaks and can't find anything abnormal in the exhaust plumbing.

Has anyone else experienced this or do I need to dig deeper??
RKS.PA is offline   Reply With Quote
Old 04-07-2021, 07:18 PM   #2
drolston
Senior Member
 
drolston's Avatar
 
Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,623
Default Re: Perhaps Another "Dumb" Question

Done a compression test lately?
drolston is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 04-07-2021, 07:37 PM   #3
JSeery
Member Emeritus
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
Default Re: Perhaps Another "Dumb" Question

The short answer is no, unless something else lead to a leak in the process. How did you block them?
JSeery is offline   Reply With Quote
Old 04-07-2021, 09:10 PM   #4
ford38v8
Senior Member
 
ford38v8's Avatar
 
Join Date: Jul 2011
Location: SF Bay Area
Posts: 6,616
Default Re: Perhaps Another "Dumb" Question

Quote:
Originally Posted by JSeery View Post
The short answer is no, unless something else lead to a leak in the process. How did you block them?
Wheatstalk pennies in the heat riser holes in the block. Wheatstalk for the alloy metal.
__________________
Alan
ford38v8 is offline   Reply With Quote
Old 04-07-2021, 11:09 PM   #5
Scotty's 52 F3
Senior Member
 
Scotty's 52 F3's Avatar
 
Join Date: Dec 2015
Location: Marana, AZ.
Posts: 404
Default Re: Perhaps Another "Dumb" Question

My exhaust sounds different with the heat risers blocked too. I have been driving it that way a few years.
Scotty's 52 F3 is offline   Reply With Quote
Old 04-07-2021, 11:23 PM   #6
RKS.PA
Senior Member
 
RKS.PA's Avatar
 
Join Date: Jun 2010
Location: Marana, AZ
Posts: 1,192
Default Re: Perhaps Another "Dumb" Question

Sponsored Links (Register now to hide all advertisements)
Quote:
Originally Posted by JSeery View Post
The short answer is no, unless something else lead to a leak in the process. How did you block them?
I blocked them with a piece of thin stainless on each side, held in place by the intake manifold gasket.

Last edited by RKS.PA; 04-07-2021 at 11:50 PM.
RKS.PA is offline   Reply With Quote
Old 04-08-2021, 07:35 PM   #7
JSeery
Member Emeritus
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
Default Re: Perhaps Another "Dumb" Question

Quote:
Originally Posted by RKS.PA View Post
I blocked them with a piece of thin stainless on each side, held in place by the intake manifold gasket.
I would check to make sure there are no leaks around that area on the intake manifold, but it should be fine.

I like to old Hot Rod wheat penny method, it should be your birth year.
JSeery is offline   Reply With Quote
Old 05-08-2021, 05:58 PM   #8
RKS.PA
Senior Member
 
RKS.PA's Avatar
 
Join Date: Jun 2010
Location: Marana, AZ
Posts: 1,192
Default Re: Perhaps Another "Dumb" Question

Thanks to all who replied....and I could have used two 1943 pennies...they are steel and are now "collector's items"!!

After checking intake manifold and header flange gaskets, turns out it was a small exhaust leak where the left connector pipe attached to the header....just a pin hole I couldn't see until I took the old pipe off. A new left connector pipe and a new Smithy muffler, installed with JB Weld muffler cement cured the noise.

As someone said here on another thread in the last few days, taking these things off once installed is a real "bear"

Great service from Victor and Liz at Red's!!! Much appreciated!!!
RKS.PA is offline   Reply With Quote
Old 05-08-2021, 06:15 PM   #9
coolcoupe
Senior Member
 
coolcoupe's Avatar
 
Join Date: May 2010
Location: ontario,Canada
Posts: 447
Default Re: Perhaps Another "Dumb" Question

I have totally forgot what the benefit of the pennies was and does it need to steel pennies ?
coolcoupe is offline   Reply With Quote
Old 05-08-2021, 08:02 PM   #10
ford38v8
Senior Member
 
ford38v8's Avatar
 
Join Date: Jul 2011
Location: SF Bay Area
Posts: 6,616
Default Re: Perhaps Another "Dumb" Question

Quote:
Originally Posted by coolcoupe View Post
I have totally forgot what the benefit of the pennies was and does it need to steel pennies ?
Cool coupe, long story here. Heat risers help vaporize the fuel when the engine is cold. Makes for a quicker warmup. A side effect of these heat risers is that they connect the two exhaust systems directly, going through the intake manifold, thereby buffering each other’s noise level. Pennies are sized perfectly to tap into the holes in the block under the manifold, and don’t interfere with the gasket, as is possible if shim stock is used. Wheatstalk pennies are of a good alloy for the purpose, not causing electrolysis. Guys used to select pennies from the year of their birth for the heck of it, and the 1943 steel pennies should work as well. Modern pennies not so well, not a good alloy. Two reasons for blocking heat risers. One, the flathead exhaust rap is accentuated, which brings a smile to my face, and two, blocking these ports helps dump heat directly to the exhaust rather than saturating the manifold with excess heat.
__________________
Alan
ford38v8 is offline   Reply With Quote
Old 05-08-2021, 08:46 PM   #11
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,260
Default Re: Perhaps Another "Dumb" Question

I like "Dumb Questions"; they seem to be the only kind I can answer.
tubman is offline   Reply With Quote
Old 05-08-2021, 10:30 PM   #12
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,516
Default Re: Perhaps Another "Dumb" Question

Sorry, but personally I would not do that to my engine.
flatjack9 is offline   Reply With Quote
Old 05-09-2021, 01:15 AM   #13
coolcoupe
Senior Member
 
coolcoupe's Avatar
 
Join Date: May 2010
Location: ontario,Canada
Posts: 447
Default Re: Perhaps Another "Dumb" Question

Thanks Alan, I had heard of this years ago but thought someone was just joking with me.
Flatjack. Is there a reason you wouldn't do that to your engine ? Just wondering what the downside is. Moe
coolcoupe is offline   Reply With Quote
Old 05-09-2021, 06:44 AM   #14
Ol' Ron
Senior Member
 
Ol' Ron's Avatar
 
Join Date: May 2010
Location: Chester Vt
Posts: 8,842
Default Re: Perhaps Another "Dumb" Question

I don't recommend this either, probably runs rich in cruise?? Flatheads sound great!
Ol' Ron is offline   Reply With Quote
Old 05-09-2021, 04:23 PM   #15
mumpsimus
Member
 
mumpsimus's Avatar
 
Join Date: Apr 2017
Posts: 92
Default Re: Perhaps Another "Dumb" Question

I’d like to keep the intake cool, but don’t need a raspy sound from the exhaust. Maybe I’ll try some pennies though and see how it goes.


Sent from my iPhone using Tapatalk
mumpsimus is offline   Reply With Quote
Old 05-09-2021, 08:15 PM   #16
flatjack9
Senior Member
 
flatjack9's Avatar
 
Join Date: May 2010
Location: Oshkosh, Wi
Posts: 4,516
Default Re: Perhaps Another "Dumb" Question

Quote:
Originally Posted by coolcoupe View Post
Thanks Alan, I had heard of this years ago but thought someone was just joking with me.
Flatjack. Is there a reason you wouldn't do that to your engine ? Just wondering what the downside is. Moe
The heat helps to keep the fuel atomized for better fuel distribution and makes for a better running, more efficient engine.
flatjack9 is offline   Reply With Quote
Old 05-09-2021, 10:20 PM   #17
mumpsimus
Member
 
mumpsimus's Avatar
 
Join Date: Apr 2017
Posts: 92
Default Re: Perhaps Another "Dumb" Question

That's true in cold weather, but in hot weather the intake charge does well when cooled. I don't drive in cold weather.
mumpsimus is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 06:35 AM.