Got a ? about open hedders

Just put some new hedders on my truck now got to get it to the muffler shop about 4 miles from the house. Other than being loud will this hurt anything,I have heard it could burn a valve don't ever remember thinking about that years ago just thought I would see what ya'll had to say about this.Thank's guys

 

I have heard that you won't burn a valve, in fact my buddy who runs open hedderes on his T and its fine. So go for it

 

Any time you change the way an engine breaths there is a possibility that the air/fuel ratio will be changed. A free-er breathing exhaust will tend to lean the mixture out and this causes higher temps at the exhaust valve. If run quite lean for an extended period there a chance of causing damage, but 4 miles? It should be ok. It'd most likely be running pretty crappy if it was that lean.

 

Just drive it to the muffler shop, nothings gonna happen.

 

Open the carb mixture screws about 1/8 to a 1/4 turn... You should be ok till you get to the shop... Just drive cool an' slow till you get there...
Then re-adjust your carb settings when you get home...

 

It would be easier to pull the choke about 1/2 to run rich. IF you've got a choke on it.

For 4 miles, personally I wouldn't worry about it.


HellRaiser

 

I run zoomies on my 29 sedan.
I take the old Harley D approach, always run em a little rich and it works out OK. As one of the other members stated, lean is the enemy.

 

It's an old wives tale perpetuated by people that are scared of their own shadow.

 

It's best to drive too the shop in the morning when the "'boys in blue" are having coffee and donuts..

 

The late model beater I just retired I bought with nothing attached to the headers and drove it some that way, and it still runs great thousands of miles later. Wasn't too gentle with it when the exhaust was off, either. I wouldn't worry about the 4 miles to the muffler shop, just go easy on the throttle if you don't want to get pulled over.

 

What, never been to a drag strip or an oval track? How about a boat race, or an air show? Lots of individual pipes and open headers there with no valve problems!

 

This pretty much sums it up.

 

I've been driving my sedan for almost four years with open headers, plus chicks dig it. Don't be scared.

 

Thank's guy's for all the info, I think it will be fine.
.

 

Bingo. I've driven with open headers for years with zero problems. Where this myth comes from I think is that if you just run an engine with NO manifold or header at all there is the possibility that cold air can be sucked into the open exhaust port and warp a hot valve. But I don't know if that even holds water.

Don

 

all the burned valves I've fixed have been on vehicles with iron manifolds and full exhaust.

 

Ever seen how short the exhaust pipes were on a P51 Mustang?


Not that you would want to run them that short on a car, as the tuned length is for a constant RPM, not the way a car is driven, but it kind of proves the short open header vs valves thing is an old wives tale.

 

Those look to be about????... 6" to 8" long...

 

wont hurt a thing................as said...old wives tale

 

You are going to have to lengthen your hood if you use this engine.

 

but it'll be SO worth it!

 

X2. Some things are WORTH screwing up the proportions for!

 

Hood? Why? I'd want to watch it run.

 

That would look good in the back of an ElCamino...