Is this exhaust safe to run?

[t.flatt]

I had these little pipes made up for cam break in on a run stand. I told the guy I wanted mufflers on them but I guess he didn't have any junky ones laying around. Am I at risk of burning up an exhaust valve if I run it like this for 20 minutes? Thanks for any input!

 

[RemCharger]

You're good, if you burn a valve it was from something else.

 

[t.flatt]

You're good, if you burn a valve it was from something else.

Thanks, man! This thing is 'bout ready to rock!

 

[RemCharger]

Thanks, man! This thing is 'bout ready to rock!

I like open pipe break ins as well, but remember, you can hear stuff going down hill alot easier with some cheap muffs

 

[33 IMP]

You'll be fine uncorked.....
but I'd buy some summit brand two chambers, or some Jones Exhaust, glasspacks. You might like the sound enough to put em on your car.

 

[493 Mike]

I will add to the replies: wear some hearing protection!
Mike

 

[Armyvet25]

Whaaaaat? You don't need no stinkin hearing protection....TURN THE RADIO UP LOUDER

 

[dan juhasz]

I had these little pipes made up for cam break in on a run stand. I told the guy I wanted mufflers on them but I guess he didn't have any junky ones laying around. Am I at risk of burning up an exhaust valve if I run it like this for 20 minutes? Thanks for any input!

View attachment 1855179

I don’t know about burning up valves but you certainly won’t be able to hear if there are any concerning noises from the fresh engine. I’d by a pair of cheap oval turbo mufflers

 

[t.flatt]

Thanks for all the replies everyone. Yes, I know this will be very loud. I started a 440 running straight out the manifolds before and we had to yell loudly to communicate!