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1965 289 Exhaust boxes

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  • cobraboy
    replied
    Originally posted by cokecan View Post
    I'm definitely in the Flowmaster camp! The GoPro vids sound awesome there. Currently looking at a pair of 50 series delta flows but have some questions;

    Not necessarily Flowmaster related but - what kind of offset should I be looking at? I appreciate this pretty much comes down to fitting but the guy I'm looking at using will happily bend pipes to suit which ever type of muffler I get. Some research suggests early 65 K-codes came with centre in/offset out mufflers but I see a lot of people going for offset in/centre out or offset in/offset out.

    I have 2.5" I/D tri-y headers. Current exhaust is barely 2" O/D with nondescript mufflers. Would you go for 2.25" or 2.5" pipes? This will be sitting behind a rebuilt/upgraded 302 with an unknown bhp but would like to make sure which ever pipes I get don't restrict too much in case I want to look at aiming for more bhp in the future.
    K codes had a stock dual exhaust exactly the same as any other factory dual exhaust, I cant remember the offsets on the mufflers, this was a 2" system. this is excepting a few months in 1965 when they got the Arvinode system, which again was 2"

    The performance did not suffer. Pipe sizing is a whole science on its own, but I do know that going too big on bore slows gas velocity and therefore dents performance. I would think 2.5" is getting on the 'big' side for a 302.

    Leave a comment:


  • makse
    replied
    According to Flowmaster website for the systems for the mustang they use offset in centre out from the diagram showing all the parts in the kit.

    Leave a comment:


  • cokecan
    replied
    I'm definitely in the Flowmaster camp! The GoPro vids sound awesome there. Currently looking at a pair of 50 series delta flows but have some questions;

    Not necessarily Flowmaster related but - what kind of offset should I be looking at? I appreciate this pretty much comes down to fitting but the guy I'm looking at using will happily bend pipes to suit which ever type of muffler I get. Some research suggests early 65 K-codes came with centre in/offset out mufflers but I see a lot of people going for offset in/centre out or offset in/offset out.

    I have 2.5" I/D tri-y headers. Current exhaust is barely 2" O/D with nondescript mufflers. Would you go for 2.25" or 2.5" pipes? This will be sitting behind a rebuilt/upgraded 302 with an unknown bhp but would like to make sure which ever pipes I get don't restrict too much in case I want to look at aiming for more bhp in the future.

    Leave a comment:


  • makse
    replied
    Sounds nice.

    I do like the way the headlights get brighter with the revs :)
    I know it's all to do with how much the alternator is generating ;)

    Leave a comment:


  • Fastback69
    replied
    Originally posted by makse View Post
    Do you have the same but from inside the cabin. Would be good to compare the difference.
    Hi, yeah, again just messing about with the gopro, bit dull, but should give you an idea of the sound. I have never regretted the 40s, they sound spot on in my opinion.

    Cheers,

    Keith

    https://youtu.be/lB9D33BJuJw

    ps. this is them on idle.

    https://youtu.be/_p2G92sN2YA

    Leave a comment:


  • makse
    replied
    Do you have the same but from inside the cabin. Would be good to compare the difference.

    Leave a comment:


  • Fastback69
    replied
    Flowmaster 40s

    Hi folks, I was recently messing about with my go pro and a new mic, I have flowmaster 40s and thought it might help to hear how mine sounds in day to day traffic. It is a bit of a dull video..

    Cheers,

    Keith

    https://youtu.be/j6Ci5bX31fw

    Leave a comment:


  • AndyP
    replied
    OK so I've been down to the factory today to fit the Magnaflow exhaust boxes first I had to cut the old boxes off, I've been calling them cherry bombs but they were Blue Streak boxes.

    Next I programmed the tube bender to make the over axle pipes (these are in 2 inch x 2mm wall stainless steel) See link to youtube showing these being made. https://youtu.be/UXCftYqEwWo

    So the tubes fit great, brackets are a miss mash but were before I started.

    Anyway I love the way they sound, gives the car a proper burble like it should have at tick over and low revs but push it and it gets pretty loud.

    So I have some decibel reading:

    With the boxes cut off just open pipes.
    Tick over 85 db
    Rev 115 db

    With the cherry bombs fitted.
    Tick over 75 db
    Rev 105 db

    With the Magnaflow fitted.
    Tick over 74 db
    Rev 99 db

    So volume is about the same but the quality of the sound is better and is defo a better sound at low rev driving.

    Leave a comment:


  • yanktankmad
    replied
    Originally posted by makse View Post
    Magnaflow's system use the 14" - 11216, so probably CJ use the same.
    You could get a borla exhaust. They’re quite nice and loud. Very loud.

    Check this one https://youtu.be/ofUVRpLFvfE

    Leave a comment:


  • makse
    replied
    Originally posted by AndyP View Post
    I'm going to give the Magnaflow a try, not sure if I will go for the 14 inch or 18 inch. I will ask C J Pony tomorrow what comes with their system and go with that.

    Boxes available from Nemisis UK 75.36 each and 84.85 each. As we are tube benders and welders I will make a pair of 2 inch st/st over axle pipes to finish the job.
    Magnaflow's system use the 14" - 11216, so probably CJ use the same.

    Leave a comment:


  • makse
    replied
    Would be interested in your solution regarding the setup with the magnaflows

    Leave a comment:


  • AndyP
    replied
    I'm going to give the Magnaflow a try, not sure if I will go for the 14 inch or 18 inch. I will ask C J Pony tomorrow what comes with their system and go with that.

    Boxes available from Nemisis UK 75.36 each and 84.85 each. As we are tube benders and welders I will make a pair of 2 inch st/st over axle pipes to finish the job.

    Leave a comment:


  • yanktankmad
    replied
    Originally posted by makse View Post
    How do they compare with Magnaflow ??
    Both are cheap and nasty compared to Blitz / HKS Jap car style. But I have to admit flowmasters sound great nice deep tone and quieter until you hammer them

    Leave a comment:


  • Midland Mustangs
    replied
    Originally posted by makse View Post
    Is that the flow master 17273 system ??
    That runs Flowmaster 40s Delta flow for more aggressive sound.

    Delta flow 50s for more moderate sound.

    Leave a comment:


  • makse
    replied
    Is that the flow master 17273 system ??

    Leave a comment:

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