Replacement Exhaust Suggestions

[ratdude747]

Noted on the bends.

I left whatever of the labels & tape didn't come off easily be everywhere but the exhaust tip and hanger. The tip was covered in the UPS shipping label and a lot of packing tape!

[Rusty_S85]

ratdude747 wrote

Noted on the bends.

I left whatever of the labels & tape didn't come off easily be everywhere but the exhaust tip and hanger. The tip was covered in the UPS shipping label and a lot of packing tape!

Did you change out the Y pipe as well?

Ive been looking at Y pipes off and on for the better part of a year trying to find something better than the walker junk I kept finding.

[ratdude747]

No y pipe... It's a 300!

The cats and downpipe are in good shape. I did replace the thermactor pipe awhile back though.

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More pics from yesterday:

[Rusty_S85]

ratdude747 wrote

No y pipe... It's a 300!

The cats and downpipe are in good shape. I did replace the thermactor pipe awhile back though.

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More pics from yesterday:

Ah ok I thought yours was a V8 not a I6.

Im trying to get a reply from Summit or Flowmaster on their Y pipe.  It looks like the converter pipe is a slip fit with a clamp but its hard to tell in the photos.  If it was that would be what I want to go with cause I can then just slip a straight pipe to my Magnaflow muffler and out the back and be done.  Problem is though the pipe is 2 1/4" where from my research the OE muffler was 2 1/2" inlet and a 2 1/4" outlet.  I think I am going to have to run a 2 1/4" to 2 1/2" adapter on the Flowmaster Y pipe if possible.

[Gary Lewis]

Looks good, Larry.  Looks stock.  

[ratdude747]

...until you see the welded washer on the stock hanger. Probably a needle in a haystack finding an original hanger in usable condition. My concern is that the weld will fail due to vinbration... then again I had to weld a snapped hanger on the Ranger and a snapped thermactor pipe brace tab to the F150's downpipe and both seem to have held so far?

[kramttocs]

Nice work!

[FuzzFace2]

ratdude747 wrote

No y pipe... It's a 300!

The cats and downpipe are in good shape. I did replace the thermactor pipe awhile back though.

What my 81 F100 with a 300 six has a Y pipe
Then again I am running EFI exh manifolds

On it the cat is a slip on.

I used the exh system off my parts truck as it was in pretty good shape and being for a long bed, mine is a short bed, the Y pipe and the mid pipe came up short by like 4 inches
The Y pipe & mid pipe were different sizes so between the adapters I was able to get they hooked together.

I am not using the cat.
Dave ----

[ratdude747]

FuzzFace2 wrote

ratdude747 wrote

No y pipe... It's a 300!

The cats and downpipe are in good shape. I did replace the thermactor pipe awhile back though.

What my 81 F100 with a 300 six has a Y pipe
Then again I am running EFI exh manifolds

Well, learn something every day. Always wanted a newer EFI 300'd F-series (aeronose, not as much of a fan of the bricknoses, didn't the 1996 ones have OBDII?), but never have, and have never seen.

[ratdude747]

Too early to say for sure, but it does seem to be running better. On a 1 hour drive to my parents' house, I didn't have to gear down (manually or by TV pressures) once on the way over. The fuel gauge didn't drop as fast seemingly too. But time will tell for sure.

[ratdude747]

MPG results are in:

Mixed driving: 15.1MPG.

Compared to the 12 I had been getting... yep, that's improved. Time will tell if it's real or just a fluke...

[Gary Lewis]

Excellent!  In just less than two weeks you'll have a good chance to get definitive results.

So, to what do you attribute the improvement?  The exhaust system?  Or did you make other changes at the same time?

[ratdude747]

Appropriately sized exhaust components of good quality.