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post #1 of (permalink) Old 11-19-2002, 06:11 PM Thread Starter
 
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Difference in exhaust components

What is the difference between an 83's exhaust (351W in all cases) and say an 89 or so.

Is it just how the cat hooks up or something? I only ask because I see lots of exhaust options for newer Broncos but next to none for my 83.
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post #2 of (permalink) Old 11-19-2002, 06:20 PM
 
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Re: Difference in exhaust components

anyway you can fit it in
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post #3 of (permalink) Old 11-19-2002, 06:31 PM
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Re: Difference in exhaust components

Dont know about pre-EFI 5.8Ls (`87&Earlier) but the cat outlet on the `86 5.0L EFI and `87-UP 5.8L is 2&1/4", with a 2&1/2" tailpipe on the 5.8Ls. I have found the problem arises in the muffler bracket that FORD changed in `87 models [img]images/graemlins/frown.gif[/img].
I have an `86 and no-one offers a system *before* 87, so i got one for a 87-96 bronco,(Flowmasters #17132) and just fabricated a bracket for the muffler.

Thats all i can suggest, good luck
Craig
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post #4 of (permalink) Old 11-20-2002, 08:06 AM Thread Starter
 
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Re: Difference in exhaust components

Craig,

So basically they run the same route and the bends over the axel remain the same?

That's really what I was asking, guess I should've gone through the barn instead of around it huh?

I can fab the rest. Just don't want to have custom pipes made.
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post #5 of (permalink) Old 11-20-2002, 01:13 PM
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Re: Difference in exhaust components

Same route & bends , YES...

The flowmaster system i got is rather quiet though (which i prefer)and since the mufflers oval unlike the factory round can, it must be mounted at an angle so you dont fry your driveshaft slipjoint boot.

The thing i really like is after the axle, the mandrel bent tailpipe curves slightly upwards so it dont dangle a foot off the Qtr. panel like the stock ones, mines only about an inch & a half off the body.

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post #6 of (permalink) Old 11-20-2002, 05:46 PM
 
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Re: Difference in exhaust components

Broncomania

Question for fellow 86er. Are the exhaust manifolds for an 86 EFI 5.0 the same as later EFI 5.8s ? I'm about to build that new system with the flowmaster 2 into 1 Y-pipe and the 3" cat. I was wondering if I can bolt up 2 1/4" flared headpipes to the stock manifolds without the crushable donuts. I've had that Y-pipe off twice in the last few years and although I remember the headpipes are smaller than 2 1/4", I never thought to measure the manifold flared end to see if they'd fit.

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post #7 of (permalink) Old 11-20-2002, 07:12 PM
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Re: Difference in exhaust components

Im not sure i know all the differences between the 5.0 and the 5.8 exhaust manifolds, but i know their not interchangable, even the shorty headers that are available for 5.0s & 5.8s have a different part #, my guess would be different outlet diameter and the fact that the 5.8 is a taller block.
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post #8 of (permalink) Old 11-20-2002, 10:31 PM
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Re: Difference in exhaust components

Well I just found it easier to have mine fabricated. The only stock part on mine is the pipes coming off the manifold down into one pipe and right after the o2 sensor is where its all new. Replaced the stock hi and low flow cats with one performace cat which is rated better then my old emmisions. Then after the cat I had it Y back out into dual pipes. Cant have true dual exhaust in the state of virginia , its illegal.
post #9 of (permalink) Old 11-21-2002, 08:41 PM
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Re: Difference in exhaust components

<font color="blue">Sixlitre</font color>:
The 5.0 manifolds don't exit in the same location as the 5.8's due to the block being wider on the 5.8.
Also, the outlets are smaller. (don't know the exact dia.)
And, another difference.....the 5.8's have an A.I.R. inlet on the RH (passenger side) manifold that is not on the 5.0's.
Here's a pic from the JBA website (click on Ford Trucks) that shows the differences.
Note, these headers fit up to the stock y-pipes, so there's definitely a difference in "exit" locations.
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File Type: jpg 951319-headers.jpg (15.5 KB, 7 views)
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