Stock exhaust muffler

40fordpu

40fordpu

Well-known member
Hey guys...

I have a 40 ford pickup with an 8ba. Looking to get the setup complete. First question is, a stock 40 engine has a 90 hp engine and smaller (85etc) while an 8ba is a 100 hp engine. Can I run a stock 40 exhaust for 8ba or are they "specially" designed for that engine type? An Exhaust/muffler design lesson would be great.

Second question is, has anyone bought macs pre-bent exhaust pipes for a 40 pickup and if so, how well do the pipes fit (length) etc???

Thanks for all your help ford barn family!!!
 
You may use the '40 manifolds. It will make the installation of a stock exhaust system much easier.
The front pipes (exhaust pipe and crossover) sold by Mac's and all the other reproduction places nearly always require some modification . This is especially true for the exhaust pipe.
 
i got the reds headers exhaust for my 36 pickup, the complete system headers and dual pipes.when i installed the headers they fit great, but i had a bad leek at the header pipes. i took the truck to a muffler shop to have flanges welded on and all the other joints welded up. they also got it to fit better. they had to tweak the pipes
Brendan
 
I am quite sure the '40 exhaust manifolds will bolt right onto the 8BA type engine. Actually it is advisable to use model year correct manifolds on any vehicle which is being upgraded to a later model flat head.

The pros and cons of installing dual exhausts, either utilizing headers and/or stock manifolds with twice pipes, will go on until someone passes a law that regulates all vehicles be as built by the manufactures.

In reality, dual exhausts do not improve the performance of the average stock engine. Racing engines are a completely different game.... Headers are meant to be run as an open exhaust, and generally do not start to work correctly until an engine is turning more than 3,000 rpm's.

Straight through mufflers, e.g. "Smitty's" and/or glass packs also fall into the smoke and mirror category... A good chambered muffler with larger pipes will do everything an engine needs. Of course the silence of a chambered muffler will not provide the "bragging rights", many men want from their vehicles.

When it comes to exhaust work, there is no substitute for a good muffler shop bending up a custom exhaust for your ride.
I would suggest stock 40 manifolds, custom bent/fabricated 2" pipes running through a pair of stock type chambered mufflers.... The 100 hp engine would breath very well and be stealth quiet...
 
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During my misspent youth, I would have been hard pressed to say what sounded the best.. A Ford V8 with dual exhausts, or a Chevy six with a split manifold and Douglas steel pack mufflers.

Shortly after getting out of school I went to work for a company in Salt Lake City. I traveled around the eleven western states in my '36 Ford for almost a year working on new buildings in many cities/towns... After many hours of listening to the roar of a loud exhaust and being hassled by the local police, I pulled the steel packs, replacing them with stock type mufflers from Western Auto...

The silence was golden, now I could hear the radio and I have not had a ticket for excessive noise in over fifty years.... Stealth is good, I let the guys with the loud exhausts draw the cops away after cruise night breaks up....
 
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