Club Cobra

Club Cobra (http://www.clubcobra.com/forums/)
-   ERA---Speak with Bob Putnam (http://www.clubcobra.com/forums/era-speak-bob-putnam/)
-   -   Exhaust clearances (http://www.clubcobra.com/forums/era-speak-bob-putnam/109569-exhaust-clearances.html)

xb-60 03-10-2011 08:02 PM
Exhaust clearances
 
Hi all.
When the time comes, the first thing the compliance/registration boys check here is exhaust clearance. Must be 4" minimum. Fail this? "Au revoir"
So if you feel inclined to get the tape measure out this weekend, can you give me figures for minimum exhaust clearances for 289FIAs, and also for reference, 427s, for sidepipes and also for undercar exhausts. There are some cars with undercar exhausts exiting in front of rear wheels. I'm interested in these as well. Oh - assuming standard suspension setups and 15" wheels, too.
As usual, many thanks!
Glen

FIA-ERA 03-10-2011 08:46 PM
Glen,
I have my exhaust tucked up pretty close. I had to "notch" the floor supports a little and I believe ERA does this on the current production cars (maybe). I used mandrel bent 3" tubes and turbo flanges. I made my side pipes with auger mufflers and they sit dead even with the frame rails as far as height goes. NOW, the only thing that I will point out is that when you do this there will be more heat translated into the frame and surrounding structures. So use reflective materials or heat barriers next to the floor boards or they will get pretty warm, very warm! It can be done, just takes more adjusting than normal. BUT, I don't hit to many speed bumps with them!! Good luck! Matt

xb-60 03-10-2011 09:40 PM
Quote:
Originally Posted by FIA-ERA (Post 1115363)
Glen,
I have my exhaust tucked up pretty close. I had to "notch" the floor supports a little and I believe ERA does this on the current production cars (maybe). I used mandrel bent 3" tubes and turbo flanges. I made my side pipes with auger mufflers and they sit dead even with the frame rails as far as height goes. NOW, the only thing that I will point out is that when you do this there will be more heat translated into the frame and surrounding structures. So use reflective materials or heat barriers next to the floor boards or they will get pretty warm, very warm! It can be done, just takes more adjusting than normal. BUT, I don't hit to many speed bumps with them!! Good luck! Matt
Thanks Matt.
So it’s underfloor, and no lower than the frame rails. I don’t know the architecture under the floor as well as you do….when the pipes come out the side in front of the wheels, do they have to bend down at all and do you lose any clearance at that point?
Can you measure it when convenient?
Cheers,
Glen

strictlypersonl 03-11-2011 05:59 AM
A picture:

Undercar muffler

xb-60 03-11-2011 06:01 PM
Quote:
Originally Posted by strictlypersonl (Post 1115402)
A picture:

Undercar muffler
Thanks Bob

FIA-ERA 03-11-2011 07:04 PM
Glen, The side pipes do bend down slightly, maybe 1/4" down but not much. The measurements are 4 1/4" at the end of the pipes. You could jack the car up some to get it through inspection and then lower it afterwords;) My pipes are very tight like the originals and I actually enjoyed making them. I'm not a big fan of the under-car exhaust. They're just isn't enough body materials to hide the mufflers. I'd post a pic but I still can't figure that one out yet! PM your email address and I can send you the pics that I have. Regards, Matt

xb-60 03-11-2011 07:35 PM
Quote:
Originally Posted by FIA-ERA (Post 1115606)
Glen, The side pipes do bend down slightly, maybe 1/4" down but not much. The measurements are 4 1/4" at the end of the pipes. You could jack the car up some to get it through inspection and then lower it afterwords;) My pipes are very tight like the originals and I actually enjoyed making them. I'm not a big fan of the under-car exhaust. They're just isn't enough body materials to hide the mufflers. I'd post a pic but I still can't figure that one out yet! PM your email address and I can send you the pics that I have. Regards, Matt
Thanks for the offer of pics Matt. PM sent
Cheers,
Glen

xb-60 03-17-2011 06:55 PM
Quote:
Originally Posted by xb-60 (Post 1115616)
Thanks for the offer of pics Matt. PM sent
Cheers,
Glen
Matt - I'm having trouble sending PM, but can receive them OK. Must be something I'm doing wrong, but don't know what.
Can you PM me your email address?
Cheers,
Glen


All times are GMT -7. The time now is 10:48 PM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: