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Jul 16, 2018 | 05:30 AM

s n v f f

Thread Starter

Racer

Joined: May 2018

Posts: 439

Likes: 328

A close one....

Hello Guys,
last night my spring leaf broke, and i discovered that the reason are my cutouts..
Even the cutouts were not pointing directly to the spring leaf, the hot exhaust gas has softened the resin of the composite spring leaf, causing it to broke in two..
i have been extremely lucky, it has happened on highway at 90 mph.. i took the very first exit, that for my luck was really near.. everything went fine

Jul 16, 2018 | 06:24 AM

AORoads

Team Owner

Joined: Jun 2005

Posts: 46,295

Likes: 2,596

From: Northern, VA

St. Jude Donor '15

"In honor of jpee"

Lesson learned by you, and you live to see another day. Maybe this will help someone else.

Jul 16, 2018 | 07:19 AM

bigblock427

Le Mans Master

Joined: Feb 2011

Posts: 9,123

Likes: 1,540

From: Edmond, Oklahoma

Quote:

Originally Posted by AORoads

Lesson learned by you, and you live to see another day. Maybe this will help someone else.

Thanks for sharing that.

Jul 16, 2018 | 08:42 AM

Patches

Team Owner

Joined: Sep 2001

Posts: 23,283

Likes: 906

From: Lake Elsinore, CA

I ran cutouts on my C5 for several thousand miles with no issues. The were in a similar location as yours but I pointed the turndowns so they had minimal effect on the spring. Ultimately, I pulled the composite springs and shocks off and replaced them with a set of coilovers. If you insist on keeping your cutouts (and I would understand why) you may want to consider coilovers. I'm currently running a Corsa X and MagnaFlow Competition catback on my C7 so absolutely no need for cutouts.

Jul 16, 2018 | 08:44 AM

s n v f f

Thread Starter

Racer

Joined: May 2018

Posts: 439

Likes: 328

^^^ Amazing clean cutout job sir

Last edited by Steve Garrett; Jul 16, 2018 at 08:11 PM.

Jul 16, 2018 | 11:14 AM

Maxpowers

Le Mans Master

Joined: Aug 2015

Posts: 6,884

Likes: 2,887

From: Toronto

Yikes. Glad this didn't turn into a 90mph crash.

Jul 16, 2018 | 11:14 AM

ImpliedConsent

Burning Brakes

Joined: Oct 2017

Posts: 1,230

Likes: 467

From: Colorado

Quote:

Originally Posted by s n v f f

Even the cutouts were not pointing directly to the spring leaf, the hot exhaust gas has softened the resin of the composite spring leaf, causing it to broke in two..

Wow! I never would have considered the leaf springs on any exhaust work. It makes sense ... now. Sorry for your mishap. Great learning event, thanks!

Jul 16, 2018 | 11:53 AM

dvilin

Team Owner

Joined: Nov 2007

Posts: 45,283

Likes: 8,559

From: Rochester, NY

Very very lucky as you know that could have been a real catastrophe. Thanks for sharing.

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Jul 16, 2018 | 12:25 PM

s n v f f

Thread Starter

Racer

Joined: May 2018

Posts: 439

Likes: 328

Quote:

Originally Posted by dvilin

Very very lucky as you know that could have been a real catastrophe. Thanks for sharing.

Thank you all guys, i think a Forum it's important for share nice experiences, but also bade mistakes that we can learn from.
thanks you all for the support

Jul 16, 2018 | 12:56 PM

#10

MerakiAutoworks

Supporting Vendor

Joined: Jan 2016

Posts: 83,058

Likes: 719

From: Orange County, CA

Dang thats bad!

At least its time for a new exhaust. haha!!

-Josh

Jul 16, 2018 | 02:14 PM

#11

sTz

Le Mans Master

Joined: Dec 2014

Posts: 6,140

Likes: 2,745

From: Northeast

Certainly good information for others who have cut-outs. Glad that you safely made it off the highway.

Jul 16, 2018 | 02:38 PM

#12

Black 03 Z06

Le Mans Master

Joined: Oct 2013

Posts: 7,100

Likes: 541

Scary business. Glad you and your car survived.

Thanks for sharing the story.

Jul 16, 2018 | 03:46 PM

#13

fsvoboda

Melting Slicks

Joined: Sep 2013

Posts: 3,119

Likes: 799

From: East Lansing, MI

Quote:

Originally Posted by Black 03 Z06

Scary business. Glad you and your car survived.

Thanks for sharing the story.

Ditto.

This is why I don't do substantive modifications. Essentially they mean that you become your own development engineer, with a lot fewer resources than the manufacturer devotes to testing and verification.

Glad it worked out well.