Introducing BISKWIK

[srode1]

I guess they are more commonly called flex joints. Like this one

https://www.jegs.com/i/Stainless+Wor...fDAr63fWGaMC0M

[Cramer4918]

I understand now.

I didn’t go with one since the majority of the systems I looked at did not have them. I figured between the fact the motor torques sideways and the length will be adequate enough to absorb the movement.

Someone correct me if I’m wrong pls.

[ScotI]

Originally Posted by srode1

I guess they are more commonly called flex joints. Like this one

https://www.jegs.com/i/Stainless+Wor...fDAr63fWGaMC0M

Originally Posted by Cramer4918

I understand now.

I didn’t go with one since the majority of the systems I looked at did not have them. I figured between the fact the motor torques sideways and the length will be adequate enough to absorb the movement.

Someone correct me if I’m wrong pls.

The more rigid the set-up, the higher the need for a flex-joint within the exhust tubing.

The 'flex' sleeves are typically needed where exhaust routing is very tight for spacing. Set-ups like this are utilizing mounting bushings (those metal tabs/hangers w/the blue bushings) that minimize movement. That 'almost fixed' mounting keeps things from moving so the movement @ the motor has to be absorbed somewhere within the exhaust system or there will most likely be a failure/crack somewhere @ a joint on the tubing.

Exhaust set-ups that have more flexible mounting/hangers & more space (the old school rubber straps or bushings used in a floating arrangement) don't necessarily need the ability to flex within the actual exhaust tubing because the system has room to expand/contract/shift w/less bind.

[Cramer4918]

Unfortunately, the flat bar I purchased was zinc coated, so I could not tack it to the exhaust with my setup.

Prior to realizing that, I made up a hanger. I made up a jig to bend the bar to curve round the pipe. I heated the bar up and then used a hammer to form it. I guess one of my next purchases will be a vise.





I planned on using grommets and rivnuts to secure the exhaust.




Using the tools and items I had available to me, it took almost an hour to make this one bracket and install the rivnut. All a waste since I can’t weld it to my exhaust. I have stainless flat bar ordered now.


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[Cramer4918]

The flat bar arrived today, but I am at the Fire Department and I am supposed to get the exhaust TIG’d up on Thursday.

I will have to take it back once I get the brackets made up to TIG those on as well.

Exhaust pulled out from under BISKWIK.



Pretty symmetrical for the most part. Not bad for my first time!


Loaded up and ready for Thursday


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[ScotI]

It's hard to tell from the images.... What material is the tubing you used?

*EDIT*
Found my answer in post #111. I think you'll want to make sure the 'hangers' used allow for some fore/aft shift as SS likes to 'grow' when it gets hot. Certain sections will see higher heat vs others so allowing movement seems to keep things happy. Just my experience/s w/the material.

[WSSix]

Agreed. I would use hangers that offer more movement similar to how factory hangers work.

[Ketzer]

I've only built a few complete exhaust systems from scratch like you did so I'm still definitely a novice at it, but I think it's a lot of fun figuring out! Also was hoping you would decide to run it all the way out the back....having ridden in several side exhaust cars, it sounds odd to my ears only hearing part of the 8 cyls. You will be happy having the sound and fumes at the very back of the car!


Jeff-

[Cramer4918]

Originally Posted by ScotI

It's hard to tell from the images.... What material is the tubing you used?

*EDIT*
Found my answer in post #111. I think you'll want to make sure the 'hangers' used allow for some fore/aft shift as SS likes to 'grow' when it gets hot. Certain sections will see higher heat vs others so allowing movement seems to keep things happy. Just my experience/s w/the material.

Originally Posted by WSSix

Agreed. I would use hangers that offer more movement similar to how factory hangers work.

I did not think about that. I appreciate the info. I will look into using a more traditional/OEM style hanger. The biggest issue I am running into is the clearance. I have tucked the exhaust up tighter than factory, so space is limited.

Originally Posted by Ketzer

I've only built a few complete exhaust systems from scratch like you did so I'm still definitely a novice at it, but I think it's a lot of fun figuring out! Also was hoping you would decide to run it all the way out the back....having ridden in several side exhaust cars, it sounds odd to my ears only hearing part of the 8 cyls. You will be happy having the sound and fumes at the very back of the car!
Jeff-

I agree, Jeff. I intend to drive this as daily as possible and I did not want the exhaust pumping out right by the windows. Nothing like a good dose of Carbon Monoxide while you're cruising!