In order to benefit from open headers on a modular 46 youd just need a custom set of cams and a tune to optimize for the RPM range of your choice thats about it. Headers plus exhaust is a pretty well documented topic and it depends on the type and design of the header and exhaust system.
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Definitely not total BS.
. Noise Laws The biggest problem with open headers is that theyre ear-shatteringly loud especially under full throttle. Well now that im almost deaf from how loud that is you need to know that it is wayyyyy louder in person and vibrated my insides lolThanks for watching and Do. How comes I never thought to clamp some tubing to the collectors just to make it to the exhaust shop.
Open headers means their is no exhaust coming off the headers no y or x pipe which means its running with no cats or muffler. 12 Nov 9 2009. We make many a late night run to the exhaust shop about 8 miles away when we finish a car.
Open Headers with no further exhaust system attached will be much different for SPL dbs. I wont actually be driving the car with open headers. No need to do it on a road car since itd smell bad get you beaten by the people you piss off and youd probably lose a small bit of fuel efficiency and low RPM power.
The way I understand it the valves tend to warp when the engine is shut down. Open header exhaust systems arent exhaust systems at all. Even with the cutouts the velocity of the exhaust still passes some of the exhaust past the Y-pipe and through the regular system piping mufflers etc.
Layout of headers is easy to determine just by looking at them. It helps the ears when you can cruise in the sweet spot. That is why race cars use single plane intakes and big or no exhaust to acheive high rpm power.
But you would be better off getting a full exhaust with cutouts. No torque God-awful loud and not even loud in a good way they just sound gross serious risk of killing yourself with CO gas poisoning after just a minute or two at least longtubes are under the car and pointing backward - shorties. Most headers are of the 4 into 1 design where all 4 pipes end together in the collector.
That magic coast RPM when the open headers are at their quietest. Wont have the exhaust til some time next week. This is a discussion on open headers within the External Engine forums part of the LSx Technical Help Section category.
I think it has more to do with the shortened distance between the open pipe and the valves. Hey guys i just put headers on my car but my exhaust system is on back order. There are probably literally hundreds of thousands of racing cars bikes boats snowmobiles etc.
On V-6 engine applications with 3 pipes per side the expression 3 into 1 would apply to this type of layout. Open headers are for high rpm horsepower not low to mid rpm torque. Is it bad.
This resulted in a much smoother sounding engine and a peak of 3985 RWHP at 5700 RPM 140 more HP - Torque increased to 3859 ft-lbs at 4900 RPM. Nowadays you can still find or better yet hear an old hot rod at a car show running open headers What are open headers Open headers are achieved when there is no pipe attached after the header hence no exhaust system. I always get a kick out of the guy at the Saturday night hangout thats bragging about what his street car runs at the track.
Joined Dec 18 2008. That get cranked up and raced every week across the globe all with open headers. As for open headers -- well how do I put this gently.
Joined May 9 2009. But right now ive almost got my car completely done. To have your cars engine run with the exhaust manifold bare rendering it obnoxiously loud according to rice boy standards.
Open shorty headers bad. On a hunch he returned the Mustang to the dyno and ran the car with open headers. MY street car runs x70s and all I did was bolt on some slicks add some race fuel dump the exhaust and take out the passenger seat.
Theyre just a set of tubular manifolds headers with no tubing whatsoever. Exhaust Manifold - A sturdy structure that covers the exit paths after. Open headers are essentially an open exhaust system with no mufflers or catalog converters.
Im getting my exhaust all fabd up right now. Open LONG tube headers loud and smelly but okay. Cold air rushes up the open headers and meets the hot valves causing warping.
Open headers or mufflers. Tonight i should have the car done and ready to fire. And some will argue that you will loose power because of no backpressure in your exhaust others will say that you dont which is true I honestly dont know.
What youre asking open headers vs. Discussion Starter 1 Feb 18 2010. Your general stock cars are by itself equipped with these items that guide muffle and clean exhaust gases as well as reduce performance by increasing backpressure.
Many off the shelf headers are designed primarily to fit the given engine and car as best as possible and secondarily to improve performance. Another style of header pipe layout is the Tri-Y design.
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