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.
2007-04-04 15:55:54 · 14 answers · asked by wheels47012 3 in Cars & Transportation ➔ Car Makes ➔ Chevrolet
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.
2007-04-04 16:33:59 · answer #1 · answered by dodge man 7 · 1⤊ 0⤋
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.
2007-04-04 16:09:56 · answer #2 · answered by Gonealot R 6 · 1⤊ 0⤋
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.
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.
If the plugs are white drop 2 jet sizes on the primaries and secondaries.
2007-04-04 16:51:35 · answer #3 · answered by Country Boy 7 · 1⤊ 1⤋
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.
2007-04-04 16:29:37 · answer #4 · answered by Anonymous · 0⤊ 0⤋
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.
2007-04-04 16:21:02 · answer #5 · answered by JERRY L 1 · 0⤊ 1⤋
Yeah its ruff on the valves should be good for bout 2500 miles before valve trouble.
2007-04-04 15:58:58 · answer #6 · answered by Anonymous · 1⤊ 0⤋
when you shut it off put a clean rag in the collector and this will stop cold air from reaching valves
2007-04-04 17:11:35 · answer #7 · answered by JOHN M 1 · 0⤊ 0⤋
Yes, valves go bad
2007-04-04 16:03:23 · answer #8 · answered by munkler_1988 3 · 1⤊ 0⤋
Yes it could do some valve damage.
2007-04-04 16:00:25 · answer #9 · answered by chuck t 2 · 1⤊ 0⤋
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
2007-04-04 18:58:52 · answer #10 · answered by jw 2 · 0⤊ 1⤋