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Fiesta ST Exhaust Thread

Dpro

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Flowmaster? Whaatt?? I have none of the sort.
My Bad for some reason I thought you had done the Flowmaster that ws another post I viewed this morning . This sinus cold is getting to my head lol
 

CSM

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My Bad for some reason I thought you had done the Flowmaster that ws another post I viewed this morning . This sinus cold is getting to my head lol
HAHA no prob.

I had a magnaflow which I hated (quiet on outside, loud on inside). Then switched to Thermal and love it, but it is on the loud side for my tastes with the Catless DP. Might need to figure out a way to quiet it up a little bit.
 

Dpro

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HAHA no prob.

I had a magnaflow which I hated (quiet on outside, loud on inside). Then switched to Thermal and love it, but it is on the loud side for my tastes with the Catless DP. Might need to figure out a way to quiet it up a little bit.
Ya I love my Thermal, honestly I will come out and say it though. You might consider getting a hi flow catted downpipe. It might quite it up a bit and truthfully we are not FoST’s adding a non catted downpipe even with a big turbo does not give enough gains to warrant running it. You just get smell and pollute. IMO
 
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You don’t hear much about it, but I love the Borla I have on the FiST. Sounds is amazing, nice burble and some pops downshifting. Highly recommend.

Absolutely no drone, and I am super sensitive to it. I have no plans for turbo upgrades or any serious mods, so the 2.25 in size is perfect. Couple with a symposer delete, the car sounds as it should.
 
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Thermal it is then. The current exhaust setup is pretty rusty, so I’m looking to do that after I clean up the rusty spots.
Join us Thermal Thermal Thermal
 

M-Sport fan

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Does anyone have a full picture of the exhaust system for the Ultimate Racing 3"? I like the look of the single downward angled tip. Curious what the remaindure of the exhaust looks like.
They WILL sell you that tip separately to put on any system you like (including the Thermal).
I bought one to install it on my CP-E Nexus system, but they are $$$! [:(]
 

M-Sport fan

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Do you have a picture of what it looks like, or better yet, a video that might show that setup?
I do not, but, I also don't suggest it with the CP-E, as the above the tail pipe mounted Helmholtz chamber of the Nexus system DOES get in the way of the large(r) Ultimate Racing 4" outlet turn down tip, keeping one from angling it up into the valance cutout to an acceptable level. [:(]

With a Thermal, or any other system without anything above the tail pipe, and a single outlet from the rear muffler, or pipe, it will be fine.
 
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I'm about to start another exhaust system build using a borla x1 lol I CANT BE STOPPED
Why don’t you just buy another Abarth lol? You need a turbo upgrade and then you won’t care about noises anymore 🙃
 
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Why don’t you just buy another Abarth lol? You need a turbo upgrade and then you won’t care about noises anymore 🙃
I think its fun :p I do miss the abarth but that thing was in for service 4 of the 12 months I owned it :| I can't go thru that again. In all honesty, I looked for opportunities to go for a drive when I had the abarth. With the FiST, it's just a daily driver - I have more interesting toys around for fun. With the Abarth I didn't miss motorcycling at all, with the FiST I am looking into if I can tow a small trailer with a pair of honda Groms on it ;) to go somewhere fun, ride until my arm stops working, then trailer 'em home.


For the exhaust stuff - I really like doing all the math and design of exhaust systems, the only thing that sucks is fabrication costs. I need access to a lift for a few hours because doing this stuff on the driveway with ramps sucks. Also, time. Need lots more time. With 80 hour weeks this hobby happens in spurts and bursts.
 
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I think its fun :p I do miss the abarth but that thing was in for service 4 of the 12 months I owned it :| I can't go thru that again. In all honesty, I looked for opportunities to go for a drive when I had the abarth. With the FiST, it's just a daily driver - I have more interesting toys around for fun. With the Abarth I didn't miss motorcycling at all, with the FiST I am looking into if I can tow a small trailer with a pair of honda Groms on it ;) to go somewhere fun, ride until my arm stops working, then trailer 'em home.


For the exhaust stuff - I really like doing all the math and design of exhaust systems, the only thing that sucks is fabrication costs. I need access to a lift for a few hours because doing this stuff on the driveway with ramps sucks. Also, time. Need lots more time. With 80 hour weeks this hobby happens in spurts and bursts.
Do are you going to add Helmholtz chambers to the Borla? I know you’re trying to replicate the Abarth noise.
 
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Do are you going to add Helmholtz chambers to the Borla? I know you’re trying to replicate the Abarth noise.
oh im not even after abarth sounds at this point, just making it fun but not intrusive.

the best abarth-like sound I've gotten so far was:
1. Stock system resonator delete (same type of sound but smoother, due to tuning, and a bit quieter)
2. 2.25" to a 2" resonator (the abarth actually necks down to 1 7/8"!!) to a T with 24" distance between them. I did not build this system, I put my car on jacks and clamped it all together an revved it. It sounded very abarth like, minus the tuning and multi-air sound difference. The fiat engine makes a really neat sound because of the multiair valvetrain; a dodge dart 1.4 makes the same sound, sounds good. If you bump the diameter of abarth exhaust too much it doesn't sound the same, i.e.
View: https://www.youtube.com/watch?v=HMyR0aMjfxw
(the first one is still small diameter, the second is 3" - the first one sounds like an abarth, the second sounds like a rice rocket. The third one is 2.5" I think, and sounds in between the two.

I do also think that the sound has something to do with the differential in exhaust pulses when the rear section is uneven (stock) vs. even (distance from tip to T where the exhaust splits). Even distance abarth exhausts sound smooth, uneven retains the goofy sound. In my testing a 30% difference in distance between the two tips gave the neat gravelly sound, while equidistant made it too smooth.

What I think would replicate abarth sound pretty well is below, 2.25" pipe, cat converter to a small resonator (or none!) to a split, with one leg of the split going straight back and the other leg going out to the side then back over to rejoin the straight tip adding 30% more distance for gases to travel. demonstrated below in shitty ascii art:


split
[cat converter]====================<=========== <- exit 1
|| \\ //= <- exit 2
(_helmholtz_) \\=====//
side loop to add distance and get to ~30% greater distance traveled.


Yes, its a sesquipedalian setup but I think it would accomplish the sound in question. I don't know if I'll bother building it, maybe exit 1 needs a neck down or a small resonator to encourage exhaust to take exit 2 or something.

I attached my ascii art as a pic because the forum keeps pooping on my formatting. Screen Shot 2019-05-15 at 12.33.51 PM.png

Here's what the abarths stock exhaust looks like, from the cat back

 

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oh im not even after abarth sounds at this point, just making it fun but not intrusive.

the best abarth-like sound I've gotten so far was:
1. Stock system resonator delete (same type of sound but smoother, due to tuning, and a bit quieter)
2. 2.25" to a 2" resonator (the abarth actually necks down to 1 7/8"!!) to a T with 24" distance between them. I did not build this system, I put my car on jacks and clamped it all together an revved it. It sounded very abarth like, minus the tuning and multi-air sound difference. The fiat engine makes a really neat sound because of the multiair valvetrain; a dodge dart 1.4 makes the same sound, sounds good. If you bump the diameter of abarth exhaust too much it doesn't sound the same, i.e.
View: https://www.youtube.com/watch?v=HMyR0aMjfxw
(the first one is still small diameter, the second is 3" - the first one sounds like an abarth, the second sounds like a rice rocket. The third one is 2.5" I think, and sounds in between the two.

I do also think that the sound has something to do with the differential in exhaust pulses when the rear section is uneven (stock) vs. even (distance from tip to T where the exhaust splits). Even distance abarth exhausts sound smooth, uneven retains the goofy sound. In my testing a 30% difference in distance between the two tips gave the neat gravelly sound, while equidistant made it too smooth.

What I think would replicate abarth sound pretty well is below, 2.25" pipe, cat converter to a small resonator (or none!) to a split, with one leg of the split going straight back and the other leg going out to the side then back over to rejoin the straight tip adding 30% more distance for gases to travel. demonstrated below in shitty ascii art:


split
[cat converter]==================== || \\ //= (_helmholtz_) \\=====//
side loop to add distance and get to ~30% greater distance traveled.


Yes, its a sesquipedalian setup but I think it would accomplish the sound in question. I don't know if I'll bother building it, maybe exit 1 needs a neck down or a small resonator to encourage exhaust to take exit 2 or something.

I attached my ascii art as a pic because the forum keeps pooping on my formatting. View attachment 20293

Here's what the abarths stock exhaust looks like, from the cat back

Well that's interesting! Did the neon srt4's do that too?

Sent from my SM-G965U using Tapatalk
 

Dpro

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oh im not even after abarth sounds at this point, just making it fun but not intrusive.

the best abarth-like sound I've gotten so far was:
1. Stock system resonator delete (same type of sound but smoother, due to tuning, and a bit quieter)
2. 2.25" to a 2" resonator (the abarth actually necks down to 1 7/8"!!) to a T with 24" distance between them. I did not build this system, I put my car on jacks and clamped it all together an revved it. It sounded very abarth like, minus the tuning and multi-air sound difference. The fiat engine makes a really neat sound because of the multiair valvetrain; a dodge dart 1.4 makes the same sound, sounds good. If you bump the diameter of abarth exhaust too much it doesn't sound the same, i.e.
View: https://www.youtube.com/watch?v=HMyR0aMjfxw
(the first one is still small diameter, the second is 3" - the first one sounds like an abarth, the second sounds like a rice rocket. The third one is 2.5" I think, and sounds in between the two.

I do also think that the sound has something to do with the differential in exhaust pulses when the rear section is uneven (stock) vs. even (distance from tip to T where the exhaust splits). Even distance abarth exhausts sound smooth, uneven retains the goofy sound. In my testing a 30% difference in distance between the two tips gave the neat gravelly sound, while equidistant made it too smooth.

What I think would replicate abarth sound pretty well is below, 2.25" pipe, cat converter to a small resonator (or none!) to a split, with one leg of the split going straight back and the other leg going out to the side then back over to rejoin the straight tip adding 30% more distance for gases to travel. demonstrated below in shitty ascii art:


split
[cat converter]====================<=========== <- exit 1
|| \\ //= <- exit 2
(_helmholtz_) \\=====//
side loop to add distance and get to ~30% greater distance traveled.


Yes, its a sesquipedalian setup but I think it would accomplish the sound in question. I don't know if I'll bother building it, maybe exit 1 needs a neck down or a small resonator to encourage exhaust to take exit 2 or something.

I attached my ascii art as a pic because the forum keeps pooping on my formatting. View attachment 20293

Here's what the abarths stock exhaust looks like, from the cat back

This looks interesting I am wondering hw this is for flow?
 
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This looks interesting I am wondering hw this is for flow?
My design or the stock Abarth one?

Probably not great for flow either way given that the Abarth sound is partially a result of the convoluted flow, hard “t” junction, and necking to 1-7/8” :| also the Abarth exhaust is significantly shorter than the FiST one
 

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