Fast Intentions exhaust is here!

kannibul · 07-08-2009, 05:31 PM

Quote:

Originally Posted by LiquidZ

I thought it was for allowing bending in the exhaust under engine load.

Nah, if that was true, you'd have a broken engine mount. It's a fitment / something to go wrong later, device.

F.I. Inc. · 07-08-2009, 05:54 PM

Quote:

Originally Posted by kannibul

Nah, if that was true, you'd have a broken engine mount. It's a fitment / something to go wrong later, device.

Correct, I see more customers with random exhaust systems that come in with blown out flex joints than just about anything. Most of the time they catch them on the pavement a wear all the way through the mesh.

shumby · 07-08-2009, 06:06 PM

Hey Tony lets make a exhaust for the FX50S I will buy it as soon as you can ship it

drisko · 07-08-2009, 06:37 PM

Sounds good. This exhaust is looking more tempting by the minute, especially with the weight savings.

Hope some dyno results come soon too.

F.I. Inc. · 07-08-2009, 07:30 PM

Quote:

Originally Posted by drisko

Sounds good. This exhaust is looking more tempting by the minute, especially with the weight savings.

Hope some dyno results come soon too.

Everything is looking on schedule for tomorrow evening. Were are shooting to bang it all out in one trip on one night.

Mike · 07-08-2009, 07:58 PM

Quote:

Originally Posted by F.I. Inc.

A very valid question!

The reason why most manufacturers use flex joints is to account for inconsistency in their production pieces. Ex: Nissan makes thousands of 370's in one year. The quality assurance on the exhaust system is probably fair at best and the flex joints allow for slight alignment variance.

We have never used flex joints in our production cat back exhaust systems for a number of reasons. Stainless Steel expands when it gets hot and flex joints will add to it like an accordion. They hinder performance by creating turbulence to the exhaust flow from the inside. They allow the system to sag as well.

We have prototyped all of our exhaust systems correctly from day 1 and do not have fitment issues. Our quality assurance is top notch and second to none. I stand behind that until the day I die! Now in some cases we use flex joints. On some of our turbocharged down pipe applications we use them. We judge each case based upon it's circumstances.

The exhaust system is bolted to the manifolds. Then it is hung in rubber. The rubber is to allow movement as to when the engine torques. See the engine is sitting in rubber motor mounts so when it torques everything bolted to it Will want to move with it. If we solid mounted an exhaust to the frame it would break when the engine torqued.

Here is some food for thought,

This is not our first car. We have over 10 high end cars that we currently have a production exhaust system for. Not one uses flex joints in the cat back. Cracking is not an issue that is common with our products especially our cat back's.

If anyone is deeply concerned about the lack of flex joints and feels they want them, We have a mandrel bender in house, we are they designers and producers of all of our products so we can fulfill any request. If you want the flex joints I will install them at an extra fee to make you feel more comfortable. I am not being sarcastic I am being serious! But, in my honest opinion they are not needed.

I will say once again, it is a valid question...

Thank you, Tony
(818) 882-2788

Tony,
Thats the best explained and worded explanation I have ever read about them. Good job!

F.I. Inc. · 07-08-2009, 10:02 PM

UPDATED-

Thank you to our newest customer- Phelan

Digtonium: 001 - Pre ordered since April
Tonmed123: 002
Import111: 003
Zat Zuma: 004
Dszombiex: 005
FuszNissan: 006
Crbn_Fbr: 007
Phelan: 008

kannibul · 07-09-2009, 09:55 AM

Quote:

Originally Posted by F.I. Inc.

Everything is looking on schedule for tomorrow evening. Were are shooting to bang it all out in one trip on one night.

Before and after dyno, I assume?

Also, I know it might be hard to request it, but, could you also do it with FI HFC's (for a third set?)

Caravanshaka · 07-09-2009, 10:13 AM

Quote:

Originally Posted by kannibul

Before and after dyno, I assume?

Also, I know it might be hard to request it, but, could you also do it with FI HFC's (for a third set?)

Fast Intentions exhaust is here!

F.I. Inc. · 07-09-2009, 10:36 AM

Quote:

Originally Posted by kannibul

Before and after dyno, I assume?

Also, I know it might be hard to request it, but, could you also do it with FI HFC's (for a third set?)

I know this thread is long and it even took me a minute to find it. This is originally what I wrote in reply #201:

Later this week probably Thursday night. But, we are aiming to get it all done in one shot. In the following order:

1) Stock (Baseline)
2) TDX cat back
3) TDX cat back w/ high flow cats
4) TDX cat back w/ resonated test pipes
5) Possibly- stock cat back w/ high flow cats
6) Possibly- stock cat back w/ resonated test pipes

We will get 3-4 runs with each configuration and take the average of each one. Not low stock and high cat back, that is inaccurate and it is false!

It is a Dynojet and it will be set in SAE all the way through.
The only change we will make will be the component we are testing. I will take video and sound clips as well.

I welded a wideband bung in to the stock exhaust to show all of you what the A/F numbers will be stock. I will also have A/F readings in every other configuration to show you if it leans out and how much.

Stay tuned...

wstar · 07-09-2009, 10:47 AM

BTW (not that this may make any difference for tonight if you're not set up for it), but our cars have a stock wideband O2 in the manifolds, which should be available data via CAN as well.

Caravanshaka · 07-09-2009, 11:49 AM

Quote:

Originally Posted by F.I. Inc.

I know this thread is long and it even took me a minute to find it. This is originally what I wrote in reply #201:

Later this week probably Thursday night. But, we are aiming to get it all done in one shot. In the following order:

1) Stock (Baseline)
2) TDX cat back
3) TDX cat back w/ high flow cats
4) TDX cat back w/ resonated test pipes
5) Possibly- stock cat back w/ high flow cats
6) Possibly- stock cat back w/ resonated test pipes

We will get 3-4 runs with each configuration and take the average of each one. Not low stock and high cat back, that is inaccurate and it is false!

It is a Dynojet and it will be set in SAE all the way through.
The only change we will make will be the component we are testing. I will take video and sound clips as well.

I welded a wideband bung in to the stock exhaust to show all of you what the A/F numbers will be stock. I will also have A/F readings in every other configuration to show you if it leans out and how much.

Stay tuned...

that was the post I linked to in my post right above you

F.I. Inc. · 07-09-2009, 07:15 PM

Off to the DYNO, at the very least I will post some numbers late tonight...

kolya · 07-09-2009, 08:06 PM

PM sent

FuszNissan · 07-09-2009, 08:20 PM

Quote:

Originally Posted by F.I. Inc.

Off to the DYNO, at the very least I will post some numbers late tonight...

07-08-2009, 06:06 PM	#258 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	Hey Tony lets make a exhaust for the FX50S I will buy it as soon as you can ship it __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

07-08-2009, 10:02 PM	#262 (permalink)
F.I. Inc. The370Z.com Sponsor Join Date: Feb 2009 Location: Simi Valley, CA Posts: 2,989 Drives: 2010 GT-R/2007 F-250 Rep Power: 685	*UPDATED-* Thank you to our newest customer- Phelan Digtonium: 001 - Pre ordered since April Tonmed123: 002 Import111: 003 Zat Zuma: 004 Dszombiex: 005 FuszNissan: 006 Crbn_Fbr: 007 Phelan: 008 __________________ *Follow us on Facebook: Fast Intentions Inc.* Phone: (805) 522-FAST (3278) Email: tony@fastintentions.com www.fastintentions.com "FUELED BY PASSION" Last edited by F.I. Inc.; 07-10-2009 at 11:55 PM.

07-09-2009, 10:47 AM	#266 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	BTW (not that this may make any difference for tonight if you're not set up for it), but our cars have a stock wideband O2 in the manifolds, which should be available data via CAN as well. __________________ 7AT Track Car! Journal thread / Car setup details

07-09-2009, 07:15 PM	#268 (permalink)
F.I. Inc. The370Z.com Sponsor Join Date: Feb 2009 Location: Simi Valley, CA Posts: 2,989 Drives: 2010 GT-R/2007 F-250 Rep Power: 685	Off to the DYNO, at the very least I will post some numbers late tonight... __________________ *Follow us on Facebook: Fast Intentions Inc.* Phone: (805) 522-FAST (3278) Email: tony@fastintentions.com www.fastintentions.com "FUELED BY PASSION"

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