Which Exh pipe size ?
Tuned
Joined: Jul 2019
Posts: 464
Likes: 80
From: Evansville, Indiana
Thanks Orich. I am looking into new exhaust my for my FE 360 (will be a 445 Stroker someday...) and want to do exhaust sooner than later since mine is rusted badly. Probably weigh the price difference between the 2.5" and 3" versus the truck not seeing over 5,000 rpms being a daily driver/towing. Neat article.
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Lead Driver
Joined: Aug 2003
Posts: 7,592
Likes: 10
From: **** hole San Jose ca.
Thanks Orich. I am looking into new exhaust my for my FE 360 (will be a 445 Stroker someday...) and want to do exhaust sooner than later since mine is rusted badly. Probably weigh the price difference between the 2.5" and 3" versus the truck not seeing over 5,000 rpms being a daily driver/towing. Neat article.
orich
Laughing Gas
Joined: Sep 2018
Posts: 1,223
Likes: 119
Thanks Orich. I am looking into new exhaust my for my FE 360 (will be a 445 Stroker someday...) and want to do exhaust sooner than later since mine is rusted badly. Probably weigh the price difference between the 2.5" and 3" versus the truck not seeing over 5,000 rpms being a daily driver/towing. Neat article.
https://www.hotrod.com/articles/what...pes-work-best/
I know people talk about how 3" is overkill but I think the majority of people who have a "performance" engine are probably have 300 hp where 3" is overkill.
Laughing Gas
Joined: Sep 2018
Posts: 1,223
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https://www.dailymotion.com/video/x5s8nr8
Tuned
Joined: May 2015
Posts: 413
Likes: 52
Given the tight area behind the headers and having to cross the driver's side over to the passenger side because of the frame mounted tank, I ended up using 2-1/4" with an h-pipe into two mufflers that I have mounted side by side between the frame and the driveshaft. I have a "y" short section leading to a 3" tail pile exiting behind the rear tire. I have a fairly healthy 447 (.040" over stroker) and it is a handful to hang onto through first gear. The cam is mostly set up for torque and with my gearing (4R70W) my prime areas for towing are 1800 to about 2800 RPM. So, I'll give away a few HP at 7500 RPM for nice torque where I need it. With the roller cam, valve train, and springs my red line is about 5300 anyway. I built the exhaust system from the headers to the back of the mufflers myself and perhaps a more talented fabricator could stuff bigger pipes in there but I don't think I'm missing anything for my intended driving needs - fun around town and towing a travel trailer.
Tuned
Joined: Jul 2019
Posts: 464
Likes: 80
From: Evansville, Indiana
GPatrick, I can agree with you on this. I looked under the truck and I'll have the same issues with the frame mounted tank. Currently the old exhaust is run side by side with some kind of glass packs, no cross over or x pipe and comes off of the factory manifolds. I planned on getting the Sanderson headers and having a local shop fabricate the exhaust from there. Not sure on mufflers and that is a whole another topic within itself, although the glass packs/tubular style mufflers can sit side by side like the current configuration and save space for a larger pipe diameter. To upgrade the exhaust, I'll have to get a mini-torque starter too...it snowballs into more and more $$$$.
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Tuned
Joined: Jul 2019
Posts: 464
Likes: 80
From: Evansville, Indiana
X Pipe sounds better and helps at higher rpms as where the H pipe is better at lower rpms. Sweet article. I used an x pipe on my 67 Cougar with a 351 Cleveland which is a higher rpm engine versus the 445 Stroker I want to build. Makes sense to use the H pipe for the truck.
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Tuned
Joined: Oct 2018
Posts: 268
Likes: 22
My 3” exhaust
I bought a Flowmaster 3 " stainless U Fit kit with mufflers for my 69 crewcab 4x4. I was able to tuck the H pipe up fairly tight to the cross member. The jog near the back is to clear the transfer case. They fit up to Sanderson coated headers and are true duals all the way to the bumper with mufflers just in front of the axle. The motor is a 505 inch torque monster. Should have around 525 HP and 650 Torque. There are more pics on my build thread
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