Running car with open headers.

[BrianGT2015]

I have a set of Texas Speed Long tubes, catless. I need to take my car to a shop but at the moment I do not have an exhaust on the car. Can I drive my car a couple of miles with open headers and not hurt nothing or am I risking my valves.

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[Barrel]

You're fine. Plenty of people, me included, race with open headers (cutouts). It will be stupid loud though.

 

[BrianGT2015]

You're fine. Plenty of people, me included, race with open headers (cutouts). It will be stupid loud though.

so if you don't mind to elaborate. Where does the idea of bent valves with no exhaust comes from.

 

[WD Pro]

Just keep the revs below 4K so you don’t damage the wheels bearings ...

Joking aside, keep away from full throttle, you don’t want to damage anything under the car as the heat won’t be exiting straight out of the back anymore

WD

 

[Barrel]

I think you mean burnt valves. I can't speak to the origin of the myth but it's not something you need to worry about on these cars. I also wouldn't worry about hurting anything under the car. Drive it to the shop and get your work done. You're fine.

 

[BrianGT2015]

Just keep the revs below 4K so you don’t damage the wheels bearings ...

Joking aside, keep away from full throttle, you don’t want to damage anything under the car as the heat won’t be exiting straight out of the back anymore

WD

My, bad, terminology was never my strong suite lol. But, ill be sure to make sure I don't damage my wheel bearings haha.

 

[WD Pro]

I think you mean burnt valves. I can't speak to the origin of the myth but it's not something you need to worry about on these cars. I also wouldn't worry about hurting anything under the car. Drive it to the shop and get your work done. You're fine.

Do you remember the post by the guy who’s tailpipes we’re short and didn’t point straight out of the valance ... ?

I’m not saying don’t do it, just be careful and don’t do any big pulls

WD

 

[BrianGT2015]

I think you mean burnt valves. I can't speak to the origin of the myth but it's not something you need to worry about on these cars. I also wouldn't worry about hurting anything under the car. Drive it to the shop and get your work done. You're fine.

I appreciate that, I have heard both, burnt valves, and then heard something about if cold air rushes back into the exhaust that the valves could bend from cooling to quickly. I basically been told its a bad idea to run open headers. I haven't run open before. I just don't want to have anything damaged and shell out more money for parts. .

The long tubes I bought where used, the person before welded the resonator delete to the connecting pipes. I was going to take that off, just take it to the exhaust shop and have them make me a 3 inch exhaust. Cheaper than buying new connecting pipes and mid pipe and I have had good luck with them in a previous build.

 

[Jay-rod427]

It wouldn't burn the valves, but bending/warping/cracking are possible if there was no headers on it. With headers like a million race cars the headers hold enough heat to slow down the cooling. The rapid cooling is what could cause valve issues.

You're good to go with headers on. But damn it will sound like a tractor. LOL

 

[BrianGT2015]

It wouldn't burn the valves, but bending/warping/cracking are possible if there was no headers on it. With headers like a million race cars the headers hold enough heat to slow down the cooling. The rapid cooling is what could cause valve issues.

You're good to go with headers on. But damn it will sound like a tractor. LOL

well, I guess i'm going to get the exhaust issue fixed asap. I guess I'm going to piss off my neighbors in a few days.

 

[Jordan @ Lethal]

I have a set of Texas Speed Long tubes, catless. I need to take my car to a shop but at the moment I do not have an exhaust on the car. Can I drive my car a couple of miles with open headers and not hurt nothing or am I risking my valves.

Like everyone has mentioned, you'll be perfectly fine to drive the car in lower rpm's without damaging anything. If you end up needing a mid-section, feel free to call us and pick our brains.

2015-mustang-gt-exhaust-systems

 

[Andrew@Lethal]

I have a set of Texas Speed Long tubes, catless. I need to take my car to a shop but at the moment I do not have an exhaust on the car. Can I drive my car a couple of miles with open headers and not hurt nothing or am I risking my valves.

You're good, just don't floor it. Keep an eye out for cops tho you'll have every cops attention in a miles range LOL

 

[K4fxd]

Unless the tune is messed up you won't have any problems running open headers.
Floor it if you want, do a full 1/4 mile pass, heck do a 1-mile full throttle run, you won't hurt anything other than your ears. Well maybe your wallet if the local Cops catch you.

That said depending on where the O2 sensor is located, it may cause the engine to run a bit rich.

Wear ear plugs.

That bent valve thing dates back to the 1920's or so. I think some kid took off the manifold on his Dad's model T.....

 

[None2Slow]

I believe the bent valves theory comes from running without exhaust manifolds or headers of any type. Back when lake pipes became popular. your fine to run it with manifolds.

 

[Genxer]

You're good, just don't floor it. Keep an eye out for cops tho you'll have every cops attention in a miles range LOL

I did that once way back in the 80s. Drove to the muffler shop with open headers on a 302. I went through the neighborhoods so that cops on the main road wouldn't stop me, and I didn't have to do a lot of revving. The looks I got People were coming out of their house to see what was coming up the road, and I was barely off idle. It was loud as he** and hilarious.

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