Engine break in no exhaust
Thread Starter
Intermediate
Joined: Apr 2009
Posts: 36
Likes: 0
Engine break in no exhaust
Engine break in with no exhaust, just headers. Are there any issues with this? Has anyone done this? I am concerned about heat.
I would like to have the car running and drive it to the muffler shop rather than have it towed.
I would like to have the car running and drive it to the muffler shop rather than have it towed.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I have done this a few times. You just can't hear anything. Make sure the floor boards are protected and nothing flammable is nearby. I prefer to be able to hear the motor but it will not hurt anything running open headers.
Melting Slicks
Joined: Jul 2006
Posts: 2,291
Likes: 493
From: Salmon Arm, BC
Lots of guys have done it....including me
Just make sure that you have a timing gun hooked up so you can dial in about 25 degrees advance at about 2000-2200 RPM while your breaking in the cam (assuming a flat tappet cam). this will keep the header heat down.
Just make sure that you have a timing gun hooked up so you can dial in about 25 degrees advance at about 2000-2200 RPM while your breaking in the cam (assuming a flat tappet cam). this will keep the header heat down.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I don't think you'll believe how loud open headers are. IMHO, pick up a couple of el cheapo mufflers with header flanges on them.
I keep a couple of these around for this exact scenario:
http://www.summitracing.com/parts/BIG-50231FLT/
I keep a couple of these around for this exact scenario:
http://www.summitracing.com/parts/BIG-50231FLT/
Last edited by billla; Sep 27, 2009 at 08:51 PM.
Race Director
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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I do the same thing. I have two stock 5.0 Mustang mufflers I have adapted to hang off the headers to keep it quiet during breakin. Those little suckers even knock the noise out of 540's and 555's!!
JIM
JIM
Instructor
Joined: Dec 2008
Posts: 180
Likes: 1
From: Charleston SC
I used open headers for my break in a couple of weeks ago. I got 45 degrees attachments from auto zone. No problems. You can check out my video here. 
http://forums.corvetteforum.com/c3-g...-20-years.html
http://forums.corvetteforum.com/c3-g...-20-years.html
Drifting
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
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