Fast Intentions exhaust is here! (continued)

Kabestro · 03-03-2013, 09:45 AM

One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

KaienZ34 · 03-03-2013, 09:56 AM

Quote:

Originally Posted by Kabestro

One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

I doubt it, i've never heard of that happening. There's something like 700 exhaust units out there with no reports of this.

showme99 · 03-03-2013, 10:54 AM

Quote:

Originally Posted by Kabestro

One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

I actually prefer exhausts that don't have the flexible sections. My last car had an aftermarket exhaust with flexible sections, and those areas were the first places to deteriorate, rust, and fail. Granted, my car was exposed to several harsh winters in upstate New York and North Dakota. The freezing temperatures and salty roads no doubt played a factor in my exhaust's early demise. It's just something to keep in mind if you live in an area with extremely cold climates.

If you live in a warm climate, you won't have to worry about this.

Kabestro · 03-03-2013, 06:00 PM

Thanks for the info guys...

F.I. Inc. · 03-04-2013, 12:05 AM

Quote:

Originally Posted by Kabestro

One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

So I just wanted to chime in on this one a little bit. Believe it or not, I have been asked this question many times over the past 9 years ever since we started making exhaust systems for the 350Z/G35 Coupe. Here is why we do not use "Flex Joints" within our 2.5" cat back exhaust system. Please try and keep an open mind when reading my reasons because some of them are facts a few are opinions and some of them are based off of experiences.

-Flex joints are designed to give you more adjustability in the exhaust fitment, yes. However they are there to soak up in consistency in slight alignment issues. If an exhaust system is not produced to the exact spec of what it is bolting up to, the flex joint will allow you to fudge it and make it fit. This is not the correct way to do things. Sure it will take the bind off of the exhaust system and in turn shift the bind into the flex joint.

-In the case of this specific car the first rubber hangers that hold the exhaust up are located right in front of the rear sway bar. That is physically far away from either the transmission brace on the catalytic converters or the head of the engine. Now if you put flex joints directly in the front of the exhaust system everything behind them will (weigh) on them. This puts a lot of stress on them and after time they will deteriorate and eventually sag or worse yet, blow out and create an exhaust leak.

-They will decrease ground clearance.

-They add material cost and production time to the build process.

-The list goes on and on but in the grand scheme of things, your engine sits in rubber motor mounts. Your exhaust system sits in rubber hangers. Your exhaust system is indirectly bolted to your engine through your cats and manifolds. Nothing is solid mounted to the car and as the engine torques, the exhaust torques with it.

Thats all I have for now. Thank you for your time.

Tony

Kabestro · 03-04-2013, 06:45 AM

Thanks for the info. Tony...

Sales@F.I. Inc. · 05-31-2013, 08:29 PM

Quote:

Originally Posted by F.I. Inc.

So I just wanted to chime in on this one a little bit. Believe it or not, I have been asked this question many times over the past 9 years ever since we started making exhaust systems for the 350Z/G35 Coupe. Here is why we do not use "Flex Joints" within our 2.5" cat back exhaust system. Please try and keep an open mind when reading my reasons because some of them are facts a few are opinions and some of them are based off of experiences.

-Flex joints are designed to give you more adjustability in the exhaust fitment, yes. However they are there to soak up in consistency in slight alignment issues. If an exhaust system is not produced to the exact spec of what it is bolting up to, the flex joint will allow you to fudge it and make it fit. This is not the correct way to do things. Sure it will take the bind off of the exhaust system and in turn shift the bind into the flex joint.

-In the case of this specific car the first rubber hangers that hold the exhaust up are located right in front of the rear sway bar. That is physically far away from either the transmission brace on the catalytic converters or the head of the engine. Now if you put flex joints directly in the front of the exhaust system everything behind them will (weigh) on them. This puts a lot of stress on them and after time they will deteriorate and eventually sag or worse yet, blow out and create an exhaust leak.

-They will decrease ground clearance.

-They add material cost and production time to the build process.

-The list goes on and on but in the grand scheme of things, your engine sits in rubber motor mounts. Your exhaust system sits in rubber hangers. Your exhaust system is indirectly bolted to your engine through your cats and manifolds. Nothing is solid mounted to the car and as the engine torques, the exhaust torques with it.

Thats all I have for now. Thank you for your time.

Tony

From page 121. Hope this clears everything up

NBZ34 · 03-03-2013, 10:19 AM

Quote:

Originally Posted by Kabestro

One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

That's on the stock Y pipe.. which the FI exhaust eliminates. Nothing to worry about.

KaienZ34 · 03-04-2013, 06:40 AM

Great info Tony....

FLYZ · 03-05-2013, 07:23 AM

What number are we on today, Blake?

ColdFire · 03-05-2013, 11:54 AM

^
Same question as I want to know when to expect my order. Updating us with the latest shipped order # will be great.

bmarcinczyk14 · 03-05-2013, 01:07 PM

Tony just a little reminder, I e-mailed you my order change like you requested, just waiting on the new invoice....Thanks!

Sales@F.I. Inc. · 03-05-2013, 03:12 PM

Quote:

Originally Posted by FLYZ

What number are we on today, Blake?

Quote:

Originally Posted by ColdFire

^
Same question as I want to know when to expect my order. Updating us with the latest shipped order # will be great.

I am working on getting this info for you guys. Give me a day or two and I will update this thread!

Quote:

Originally Posted by bmarcinczyk14

Tony just a little reminder, I e-mailed you my order change like you requested, just waiting on the new invoice....Thanks!

I will make sure we don't forget to get your invoice ASAP!

Sh0velMan · 03-06-2013, 07:30 AM

Does anyone have a photo of the FI exhaust system, installed, from directly below the rear differential?

I'm trying to see how occluded the differential is from below while the system is installed.

Thanks!

KaienZ34 · 03-06-2013, 08:02 AM

Quote:

Originally Posted by Sh0velMan

Does anyone have a photo of the FI exhaust system, installed, from directly below the rear differential?

I'm trying to see how occluded the differential is from below while the system is installed.

Thanks!

It is chilly out so i just snapped a few, i don't know if this helps. Nothing touches it's just the angle cause it was hard to get under there.

03-04-2013, 06:40 AM	#9 (permalink)
KaienZ34 A True Z Fanatic Join Date: Oct 2009 Location: LA. not L.a. Posts: 21,652 Drives: Z34 Tour/Sport Rep Power: 178	Great info Tony.... __________________ *"These Violent Delights Have Violent Ends"* http://www.the370z.com/members/kaienz34-albums-z34.html

03-05-2013, 07:23 AM	#10 (permalink)
FLYZ Base Member Join Date: Jan 2012 Location: Houston Age: 39 Posts: 109 Drives: '10 370Z 40 A.E. Rep Power: 14	What number are we on today, Blake? __________________ Fast Intentions CBE, 18" resonators and resonated HFCs \| TWM short throw shifter \| Stillen G3 CAI \| Z1 hub centric spacers (F-15mm,R-20mm) \| Custom painted fangs and door handles \| Valentine V1/Blendmount/Hide-a-cord \| Nismo shift knob \| 40th Anniversary build number badging \| GT-R starter \| Plastidip

03-05-2013, 01:07 PM	#12 (permalink)
bmarcinczyk14 Track Member Join Date: Jul 2009 Location: Chicago Posts: 505 Drives: 2010 370z 6spd Sport Rep Power: 17	Tony just a little reminder, I e-mailed you my order change like you requested, just waiting on the new invoice....Thanks! __________________ '10 370z -- '09 Ducati 848 -- '05 Kawasaki 636 Track Bike -- '02 Sentra SE-R Spec V

03-06-2013, 07:30 AM	#14 (permalink)
Sh0velMan A True Z Fanatic Join Date: Jan 2012 Location: Dallas/Ft.Worth Posts: 3,349 Drives: Noisily. Rep Power: 21	Does anyone have a photo of the FI exhaust system, installed, from directly below the rear differential? I'm trying to see how occluded the differential is from below while the system is installed. Thanks! __________________ Buy My Car! \| Build Thread

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03-03-2013, 09:45 AM	#1 (permalink)
Kabestro Enthusiast Member Join Date: Aug 2012 Location: Puerto Rico Posts: 331 Drives: 13 Nissan 370Z MR M6 Rep Power: 40	One question guys, I don't know if this has been discussed before, there are too many pages in this thread to read. The stock exhaust has two flexible sections on each side, the F.I. doesn't have any, is there a chance of breaking the exhaust for being to rigid?

03-03-2013, 06:00 PM	#4 (permalink)
Kabestro Enthusiast Member Join Date: Aug 2012 Location: Puerto Rico Posts: 331 Drives: 13 Nissan 370Z MR M6 Rep Power: 40	Thanks for the info guys...

03-04-2013, 06:45 AM	#6 (permalink)
Kabestro Enthusiast Member Join Date: Aug 2012 Location: Puerto Rico Posts: 331 Drives: 13 Nissan 370Z MR M6 Rep Power: 40	Thanks for the info. Tony...

03-05-2013, 11:54 AM	#11 (permalink)
ColdFire Base Member Join Date: Dec 2012 Location: Qatar Age: 35 Posts: 106 Drives: 13 370Z 6MT, 15 GT-R Rep Power: 369	^ Same question as I want to know when to expect my order. Updating us with the latest shipped order # will be great.

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