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Ok, back at it on my new to me ‘81 single cab short bed (302, 4x4, c6 transmission… if that makes a difference on exhaust shape).
This truck is a rust bucket but it runs and drives so I just wanna keep it doing that and make it more comfortable.
The exhaust however is a total loss, the pipe is nearly in 2 immediately after the “y” from the manifold and then gaping holes at ever turn of the pipe. I want to do all work on this myself (I will be getting better at welding on the fly).
Do I buy exhaust parts from auto store and assemble or is this a “diy exhaust kit” situation? I’m not seeing a diagram of the exhaust system in my Haynes manual. If you can share a good one I’d appreciate it.
I want the truck as stock as possible but cost is a factor here. Thanks for you guidance.
I would check with the auto parts store and see if a system can be bought as it will save time and no welding as you use muffler clamps.
It also be stock that you are after and if you want to delete the cat just get pipe to fit in its place.
My 81 F100 is running factory pipes less cat and a welded muffler for a little rumble.
Dave ----
1st off you need to know your wheelbase when you go to order the pipes. From what I can tell, since you have a shortbed you have a 117 inch wheel base. You can check that to make sure. I believe a long box truck was 133 inch wheel base, extended cab must have been 155 inches.
Looking on rockauto, if we stick with Walker products, the muffler listed is #18319
They have #42477 intermediate pipe, but I believe that is for a 133 inch wheelbase. You may have to simply cut it shorter for your shortbed.
They only have one left #45746 tailpipe
For the convertor they do not offer it. They do sell universal convertors, you could buy one of those and clamp it in place.
If you use the walker numbers above and in the diagram below in a google search, you can find more sources. I plugged in walker 40279 in a google search, and summit racing and Oreilly's said they can get this y-pipe. You can look the other numbers up also.
1st off you need to know your wheelbase when you go to order the pipes. From what I can tell, since you have a shortbed you have a 117 inch wheel base. You can check that to make sure. I believe a long box truck was 133 inch wheel base, extended cab must have been 155 inches.
Looking on rockauto, if we stick with Walker products, the muffler listed is #18319
They have #42477 intermediate pipe, but I believe that is for a 133 inch wheelbase. You may have to simply cut it shorter for your shortbed.
They only have one left #45746 tailpipe
For the convertor they do not offer it. They do sell universal convertors, you could buy one of those and clamp it in place.
If you use the walker numbers above and in the diagram below in a google search, you can find more sources. I plugged in walker 40279 in a google search, and summit racing and Oreilly's said they can get this y-pipe. You can look the other numbers up also.
Thanks, that’s really helpful. Mine currently has dual exhaust and I hadn’t realized that wasn’t stock.
At some point someone must have put an edelbrok 4barrel and dual exhaust in this. Would taking the exhaust back to stock mess with back pressure? What would the ramifications be? Would I need/have to adjust other things (carb, intake,…)??
Thanks, that’s really helpful. Mine currently has dual exhaust and I hadn’t realized that wasn’t stock.
At some point someone must have put an edelbrok 4barrel and dual exhaust in this. Would taking the exhaust back to stock mess with back pressure? What would the ramifications be? Would I need/have to adjust other things (carb, intake,…)??
Putting it back to stock single would not hurt anything. No adjustments necessary. But of course you would need the stock exhaust manifolds and then a new y-pipe and everything all the way back. You can do this at home, the walker stuff bolts up but there are slight mods here and there that you can handle. Like some of the stock hangers may not work, or they may have been cut off. You can buy univeral hangers at the store and bolt them up.
I thought some trucks came with duals out of the cat to the muffler then 2 different tail pipes?
Dave ----
The only ones I have seen like that were certain 460 equipped trucks. They must have been the later models, this diagram goes to 86 and it doesn't show it.
Now that I get thinking about it I dont think it was 2 pipes out of the cat only 1 but 2 tail pipes to make it look like dual's?
You may be right on the later & larger motor trucks just thought I see posted dual pipes from the factory
I just know you cant run true dual's with out a lot of work because of the side fuel tank being in the way.
Dave ----
Waldron Exhaust sells complete exhaust kits for vintage vehicles. THey have one for the 80 - 86 F150 trucks they are how ever from the converters back. Youd have to source a converter or some straight pipe to make the connection between Y pipe and the rest of the exhaust.
Waldron Exhaust sells complete exhaust kits for vintage vehicles. THey have one for the 80 - 86 F150 trucks they are how ever from the converters back. Youd have to source a converter or some straight pipe to make the connection between Y pipe and the rest of the exhaust.
Converter delete pipes (which cannot be called "converter delete pipes") are sold as "test pipes"... not for street use. Just match up the diameter and cut to fit.
IANAL.
Now that I get thinking about it I dont think it was 2 pipes out of the cat only 1 but 2 tail pipes to make it look like dual's?
You may be right on the later & larger motor trucks just thought I see posted dual pipes from the factory
I just know you cant run true dual's with out a lot of work because of the side fuel tank being in the way.
Dave ----
My 95 SC F350 DRW had the 2 tailpipes after muffler, I have saw the dual into muffler and 1 tail in earlier years. 95 Bronco with 351 HO had dual rear pipes with chrome tips. I bought a spare set of tails for that.
Converter delete pipes (which cannot be called "converter delete pipes") are sold as "test pipes"... not for street use. Just match up the diameter and cut to fit.
IANAL.
Yep, Im getting a Y pipe for my truck from Flowmaster its a stainless steel Y pipe with a slip on converter. Ill be scrapping the converter for a little cash and I will be installing a stainless steel 2 1/2" straight pipe from the Y pipe back to my Magnaflow XL 3 Chamber round muffler.
In my instance its easier to find stainless steel straight pipe over trying to find test pipes which are typically not long enough for fabricating a whole new exhaust system.
My 95 SC F350 DRW had the 2 tailpipes after muffler, I have saw the dual into muffler and 1 tail in earlier years. 95 Bronco with 351 HO had dual rear pipes with chrome tips. I bought a spare set of tails for that.
Thats how they were on the previous trucks. Single exhaust up to the muffler then the outlet side of the muffler had two exits with dual pipes running side by side as the tail pipes. One could take and use that to fabricate a dual exhaust look with exits on each side. I personally decided to just go single 2 1/2" all the way back in the OE layout.
