Fast Intentions exhaust is here! (continued)

njobe89 · 02-27-2015, 01:20 PM

Quote:

Originally Posted by Bully

I'm not familiar with FI's processes or actual material specs used on the CF mufflers, but I stayed at a Holiday Inn Express last night. To answer your question, no CF does not deteriorate or warp in icy conditions.

To go a step further, based on the application, my guess is that these mufflers are carbon fiber reinforced ceramics. This is the same type of material used on heat shields of space vehicles. They can handle the frigid temperatures of space and the extremely high temperatures of re-entry through the atmosphere. The ceramic portion of the composite matrix prevents galvanic corrosion between the carbon fiber and stainless steel components of the exhaust. It appears that the muffler is resin coated (smooth glossy clear finish) for anyone worried about mechanical failure due to the difference in the CTE (coefficient of thermal expansion) between the carbon fiber and stainless steel.

i'm definitely staying at a holiday inn next time

FPenvy · 02-27-2015, 01:42 PM

Quote:

Originally Posted by Bully

I'm not familiar with FI's processes or actual material specs used on the CF mufflers, but I stayed at a Holiday Inn Express last night. To answer your question, no CF does not deteriorate or warp in icy conditions.

To go a step further, based on the application, my guess is that these mufflers are carbon fiber reinforced ceramics. This is the same type of material used on heat shields of space vehicles. They can handle the frigid temperatures of space and the extremely high temperatures of re-entry through the atmosphere. The ceramic portion of the composite matrix prevents galvanic corrosion between the carbon fiber and stainless steel components of the exhaust. It appears that the muffler is resin coated (smooth glossy clear finish) for anyone worried about mechanical failure due to the difference in the CTE (coefficient of thermal expansion) between the carbon fiber and stainless steel.

the muffler "cans" are CF shells with SS ends. most people I talk to about my exhaust think its just some mufflers wrapped in a CF shell.

but as for them holding up I agree with this guy. they are pretty tough. I may not have driven in winter but I've had mine on for about 30K miles prior to removing my mufflers for straight pipes. only marks on mine so far are small chips in the clear coat from rocks. no dents, breaks, cracks, etc...

Bully · 02-27-2015, 02:59 PM

Quote:

Originally Posted by FPenvy

the muffler "cans" are CF shells with SS ends. most people I talk to about my exhaust think its just some mufflers wrapped in a CF shell.

but as for them holding up I agree with this guy. they are pretty tough. I may not have driven in winter but I've had mine on for about 30K miles prior to removing my mufflers for straight pipes. only marks on mine so far are small chips in the clear coat from rocks. no dents, breaks, cracks, etc...

My guess is that the cans are stainless steel wrapped with the composite material which makes the thermal expansion part interesting. I'm sure they cycle tested these things. Easy test would be to just pick them up. If they were just hollow skins, I'm sure they would advertise the weight difference to help justify the $300 difference.

EDIT: Wow. They do advertise it. SS cans make the system 47lb. CF 41lb. From what I can see it looks like maybe the composite skins are just wedged over flanges extruding from each end of the SS sandwiching it. That would be a smart design because bolting it or attaching it in any rigid way would introduce compressive loads in the exhaust during warm up. Carbon fiber structures are amazing in tension and horrible in compression.

FPenvy · 02-27-2015, 03:02 PM

Quote:

Originally Posted by Bully

My guess is that the cans are stainless steel wrapped with the composite material which makes the thermal expansion part interesting. I'm sure they cycle tested these things. Easy test would be to just pick them up. If they were just hollow skins, I'm sure they would advertise the weight difference to help justify the $300 difference.

actually im pretty positive its just a CF shell capped by SS butt plates.

tony, correct me if i'm wrong please.

BC416 · 02-27-2015, 01:38 PM

I lucked into picking up a used F.I. 18" CBE from a forum member here. On it's way to me now. I'm going to be ordering up a new gasket/hardware set from F.I. for the install. I got some Chemical Guys Metal Polish as well to clean it up. Anything else I need to know or do before putting this bad boy on?

Leroydsouza · 02-27-2015, 03:54 PM

I ordered mine 2 days ago. ( 18 Resonated CBE With RHFC)
If anyone has this setup, How does it sound ? or How great does it sound

What were you guys doing for 3 months waiting for the exhaust
I think i am done blasting my speakers on all Fast intentions videos possible.

WAITING FOR JUNE LOL

cooltoy · 02-27-2015, 04:17 PM

Quote:

Originally Posted by FPenvy

actually im pretty positive its just a CF shell capped by SS butt plates.

tony, correct me if i'm wrong please.

That is what they are FP.

12nismo · 02-27-2015, 04:45 PM

Is the concensus now that the non-resonated F.I. CBE goes best with the LTH's? I'm thinking of swapping my 18" res x-pipe out for a non-res one. I'm looking for more of a rumble and scream (similar to the motordyne exhaust) and am wondering if going non-res would help. Any suggestions would be greatly appreciated

jooonnn · 03-01-2015, 09:22 AM

Quote:

Originally Posted by 12nismo

Is the concensus now that the non-resonated F.I. CBE goes best with the LTH's? I'm thinking of swapping my 18" res x-pipe out for a non-res one. I'm looking for more of a rumble and scream (similar to the motordyne exhaust) and am wondering if going non-res would help. Any suggestions would be greatly appreciated

I would think test pipes and non res would be more of a screamer. Headers are deeper sounding than test pipes, non res is def higher pitched than 18"

Sent from my iPad using Tapatalk

charjohnnie · 03-03-2015, 05:21 PM

Quote:

Originally Posted by 12nismo

Is the concensus now that the non-resonated F.I. CBE goes best with the LTH's? I'm thinking of swapping my 18" res x-pipe out for a non-res one. I'm looking for more of a rumble and scream (similar to the motordyne exhaust) and am wondering if going non-res would help. Any suggestions would be greatly appreciated

Will you be selling your exhaust then?

12nismo · 03-04-2015, 07:56 AM

Quote:

Originally Posted by charjohnnie

Will you be selling your exhaust then?

No, if I decide to go the non-res route, I would just purchase a non-res X-pipe and swap it out...thats another great thing about the F.I. set-up.

Merv · 03-04-2015, 08:15 AM

Thank you fast intentions.
I have received my exhaust and installed it over the weekend. Looks and sounds amazing! Too many thumbs up to count when on my daily commutes.

Spooler · 03-01-2015, 12:58 AM

Just installed my new/used FI CBE today. Non-resonated sounds real good. Now maybe I can hear the car with the radio turned up.

EYE ESS · 03-03-2015, 12:28 PM

Has anyone seen a really good comparison video between the no resonator, 12" and 18"? I am trying to pick between the three and having a hard time deciding. Another issue is that each video is recorded with different volumes in place so it is hard to compare. Ideally I want something that sounds sexy, minimal drone, and will not attract too much attention in a work parking lot.

Gen 3 install will be end of this month, going for FI exhaust(12 weeks?), and then Berk HFC. Possibly a tune after that. Sticky tires and then I'm all done with the car.

FPenvy · 03-03-2015, 12:40 PM

Quote:

Originally Posted by jooonnn

I would think test pipes and non res would be more of a screamer. Headers are deeper sounding than test pipes, non res is def higher pitched than 18"

Sent from my iPad using Tapatalk

I had that set up originally and yes it's a screamer. you are also correct with the LTHs giving a deeper tone overall to the system.

Quote:

Originally Posted by EYE ESS

Has anyone seen a really good comparison video between the no resonator, 12" and 18"? I am trying to pick between the three and having a hard time deciding. Another issue is that each video is recorded with different volumes in place so it is hard to compare. Ideally I want something that sounds sexy, minimal drone, and will not attract too much attention in a work parking lot.

Gen 3 install will be end of this month, going for FI exhaust(12 weeks?), and then Berk HFC. Possibly a tune after that. Sticky tires and then I'm all done with the car.

think of the NR, 12, and 18 like this: drone, less drone, least drone.

the volume difference between NR and the 12/18 is louder and the 12/18 res have minimal volume differences between them.

02-27-2015, 01:38 PM	#5 (permalink)
BC416 Track Member Join Date: Jun 2014 Location: NJ Age: 38 Posts: 718 Drives: 2012 KAD 6MT Rep Power: 593	I lucked into picking up a used F.I. 18" CBE from a forum member here. On it's way to me now. I'm going to be ordering up a new gasket/hardware set from F.I. for the install. I got some Chemical Guys Metal Polish as well to clean it up. Anything else I need to know or do before putting this bad boy on? __________________ F.I. / K&N / 180 / Forgestar

02-27-2015, 03:54 PM	#6 (permalink)
Leroydsouza Enthusiast Member Join Date: Mar 2013 Location: Dubai Posts: 265 Drives: Nissan 370z 2014 Rep Power: 13	I ordered mine 2 days ago. ( 18 Resonated CBE With RHFC) If anyone has this setup, How does it sound ? or How great does it sound What were you guys doing for 3 months waiting for the exhaust I think i am done blasting my speakers on all Fast intentions videos possible. WAITING FOR JUNE LOL __________________ 370z 2014 7AT \|Carbon Signal - GT Edition\| Last edited by Leroydsouza; 02-27-2015 at 03:57 PM.

02-27-2015, 04:45 PM	#8 (permalink)
12nismo Base Member Join Date: Apr 2012 Location: Houston, TX Posts: 153 Drives: 2012 370z nismo Rep Power: 16	Is the concensus now that the non-resonated F.I. CBE goes best with the LTH's? I'm thinking of swapping my 18" res x-pipe out for a non-res one. I'm looking for more of a rumble and scream (similar to the motordyne exhaust) and am wondering if going non-res would help. Any suggestions would be greatly appreciated __________________ nismo Z34 12 0209 JTran Motorsports//Stillen//Fast Intentions//EcuTek//Z1 Motorsports//Eibach//BRIDE //Zspeed//Carbon Signal//Houston Halos//Southbend//Whiteline//TWM//NonStopTuning//Doran Racing

03-04-2015, 08:15 AM	#12 (permalink)
Merv Track Member Join Date: Dec 2013 Location: Vancouver B.C Posts: 518 Drives: 11 GM grey sport tou Rep Power: 15	Thank you fast intentions. I have received my exhaust and installed it over the weekend. Looks and sounds amazing! Too many thumbs up to count when on my daily commutes. __________________ Swift springs \| upgraded headlights \| stillen gen3 cai \| FI HFC's and FI CBE \| ecutek tune in the mail!

03-03-2015, 12:28 PM	#14 (permalink)
EYE ESS Base Member Join Date: Jun 2011 Location: Sideways Posts: 107 Drives: Like a Boss Rep Power: 15	Has anyone seen a really good comparison video between the no resonator, 12" and 18"? I am trying to pick between the three and having a hard time deciding. Another issue is that each video is recorded with different volumes in place so it is hard to compare. Ideally I want something that sounds sexy, minimal drone, and will not attract too much attention in a work parking lot. Gen 3 install will be end of this month, going for FI exhaust(12 weeks?), and then Berk HFC. Possibly a tune after that. Sticky tires and then I'm all done with the car. __________________ CURRENT: '11 Gun Metallic 370Z 6MT Sport SOLD: '10 Solid Red 370Z 6MT Sport - Car Pictures \| '08 Obsidian IS250 6MT \| '04 Eternal Blue Pearl RSX

03-01-2015, 12:58 AM	#13 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,111 Drives: 2013 Nismo 370z Rep Power: 2684394	Just installed my new/used FI CBE today. Non-resonated sounds real good. Now maybe I can hear the car with the radio turned up.

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