Running with open headers? bad or good?

Question:
75 chevy truck, 350. would driving it 4 miles to school with open headers hurt it? not goin faster than 55. only reason im asking is because I heard when you shut the truck off it can suck air thru the pipes and warp a valve.

Answers:

1999 honda civic lx?

i own a shop,and it is pretty hard on them because of the amount of air they will pull back in,also when your driving it,it will pull air back in every time you let up on it,and it has been known to warp a lot of valves before,id try and cap them with something,because it could get a few valves,its a big chance to take,id think this one through before i did it,good luck with it man.

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Yeah its ruff on the valves should be good for bout 2500 miles before valve trouble.

My 2003 Jeep Wrangler won't shift into park?

Yes it could do some valve damage.

What year and make is the Porsche in "Scarface"?

Yes, valves go bad

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Not to mention, a little back pressure is good for engines.

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As to sucking cold air back into the hot heads and warping the valve, this can happen if the headers are short or the engine "back cycles" or "runs on" but running with open headers is bad for the engine as it reduces the back pressure which your engine is designed to have to run properly. It may also be illegal in many areas because of noise.

My '90 GMC Sierra 1500 is overheating a little,( I've changed the thermostat), can it be the timing?

Just get yourself a set of glass-packs,will still sound good when you get on it and won't have to worry about frying valves and attracting cops.

Does anyone have more than 220,000 miles on their 1992 Toyota Corolla?

first, why drive it with open headers, second ,i drag race a 1971 vega 406sbc, around 650hp, after a 1/8mi run i drive it back to the pits never warped a valve in 7years, i would wear ear plugs though.

I have a question about the maintenance of the fuel filter on my 1997 jeep cherokee.?

You will burn your exhaust valves and possibly seize the engine. You need the back-pressure provided by the exhaust system. Why drive? You're not going far enough to get up to operating temperature and will sludge up you oil and cause excess wear on all moving parts.

What is the skid plate called that can connect to the bottom of a jeeps front bumper and protect the axel?

Here's the trick. Take an old sock and stuff it with cloth. It must be tight enough to seal off outside air. You'll do fine. We transported a blacktop modified as soon as it was tied down and the headers were always plugged for the ride.

What should i do to my 1999 mazda protege?


You may want to double check your jetting by reading the very base of the insulators after an open header run. Open headers cause lean mixtures with off the shelf carburetors. the insulator bases must look slightly tan and you'll know your mixture is about right.

Do Nissan make good cars??


If the plugs are white drop 2 jet sizes on the primaries and secondaries.

Is it safe to say we should just flush yesterday down the toilet?

Cork them!
Open them at the track only.
Not only bad valves, think of your neighbors!

Porsche Radio isn't working?

when you shut it off put a clean rag in the collector and this will stop cold air from reaching valves

I need to find a website sells VOLVO S80 Parts online?

oh man, it might be rough on it, and it might be a little illegal, but it sounds so freakin awesome. :)

Are ACURA RDX AND HONDA CRV are just one?

pick up a summit catalog and buy your self a set of purple Horny's, the bolt right to your headers they are about 2ft. long they will solve the problem and don't cut back on the sound to much
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