Nowwhat said:Kiss my left nut Hillbilly.......I had to count to 10 before I even started the post.....
I knew he was readin this!LOLOL
my screen started glowing a bright red!:joyman:
Nowwhat said:Kiss my left nut Hillbilly.......I had to count to 10 before I even started the post.....
Nowwhat said:the ape likes headers 'cuz they are shiney....Stink likes them 'cuz they have the word "head" in them.....they both endorse them 'cuz they are old and they long for the days of big CI's, twin Holleys and tuning via a screwdriver and the color of a tailpipe....barbarians both of them....and I can't prove it but I think they sodomize farm animals...
male ones....
Nowwhat said:the ape likes headers 'cuz they are shiney....Stink likes them 'cuz they have the word "head" in them.....they both endorse them 'cuz they are old and they long for the days of big CI's, twin Holleys and tuning via a screwdriver and the color of a tailpipe....barbarians both of them....and I can't prove it but I think they sodomize farm animals...
male ones....
Nowwhat said:ohhh FOR F$%CK SAKE......
The MAN ASKED ABOUT HEADERS ON A S/C APPLICATION...NOT HOW MUCH THEY MAKE ON A N/A DYNO OR HOW MUCH THEY IMPROVED A 1/4 TIME WITH OUT A S/C.....
DON'T GET THE FREAKIN HEADERS IF YOU HAVE A S/C.....
ADDING HEADS AND A CAM..?..GOING TO MATCH PORT YOUR INTAKE...?..THEN GET SOME $2500 HEADERS AND HAVE AT IT....you will need them and they will kick ass...
I went to DC performance this A.M. to confirm that I still don't need headers and I will be making 1100rwhp....
For the 400th time....when you install long tubes and see a big hp gain....a large portion of that gain is in the catless midpipes....yes....headers will get you 15rwhp on a N/A truck...now ask yourself if 15rwhp is worht the $$$$$$$$$
Headers look coool....they sound cool....but so does a CAI.....![]()
Silverback said:Now for the serious side of this discussion.
It would be really nice if Dan would come on here and explain his reasoning for not using headers. I would really enjoy listening to his side of this.
Stinker said:The goal of headers is to make it easier for the engine to push exhaust gases out of the cylinders.
When you look at the four-stroke cycle in How Car Engines Work, you can see that the engine produces all of its power during the power stroke. The gasoline in the cylinder burns and expands during this stroke, generating power. The other three strokes are necessary evils required to make the power stroke possible. If these three strokes consume power, they are a drain on the engine.
During the exhaust stroke, a good way for an engine to lose power is through back pressure. The exhaust valve opens at the beginning of the exhaust stroke, and then the piston pushes the exhaust gases out of the cylinder. If there is any amount of resistance that the piston has to push against to force the exhaust gases out, power is wasted. Using two exhaust valves rather than one improves the flow by making the hole that the exhaust gases travel through larger.
In a normal engine, once the exhaust gases exit the cylinder they end up in the exhaust manifold. In a four-cylinder or eight-cylinder engine, there are four cylinders using the same manifold. From the manifold, the exhaust gases flow into one pipe toward the catalytic converter and the muffler. It turns out that the manifold can be an important source of back pressure because exhaust gases from one cylinder build up pressure in the manifold that affects the next cylinder that uses the manifold.
The idea behind an exhaust header is to eliminate the manifold's back pressure. Instead of a common manifold that all of the cylinders share, each cylinder gets its own exhaust pipe. These pipes come together in a larger pipe called the collector. The individual pipes are cut and bent so that each one is the same length as the others. By making them the same length, it guarantees that each cylinder's exhaust gases arrive in the collector spaced out equally so there is no back pressure generated by the cylinders sharing the collector.
Stinker said:The goal of headers is to make it easier for the engine to push exhaust gases out of the cylinders.
When you look at the four-stroke cycle in How Car Engines Work, you can see that the engine produces all of its power during the power stroke. The gasoline in the cylinder burns and expands during this stroke, generating power. The other three strokes are necessary evils required to make the power stroke possible. If these three strokes consume power, they are a drain on the engine.
During the exhaust stroke, a good way for an engine to lose power is through back pressure. The exhaust valve opens at the beginning of the exhaust stroke, and then the piston pushes the exhaust gases out of the cylinder. If there is any amount of resistance that the piston has to push against to force the exhaust gases out, power is wasted. Using two exhaust valves rather than one improves the flow by making the hole that the exhaust gases travel through larger.
In a normal engine, once the exhaust gases exit the cylinder they end up in the exhaust manifold. In a four-cylinder or eight-cylinder engine, there are four cylinders using the same manifold. From the manifold, the exhaust gases flow into one pipe toward the catalytic converter and the muffler. It turns out that the manifold can be an important source of back pressure because exhaust gases from one cylinder build up pressure in the manifold that affects the next cylinder that uses the manifold.
The idea behind an exhaust header is to eliminate the manifold's back pressure. Instead of a common manifold that all of the cylinders share, each cylinder gets its own exhaust pipe. These pipes come together in a larger pipe called the collector. The individual pipes are cut and bent so that each one is the same length as the others. By making them the same length, it guarantees that each cylinder's exhaust gases arrive in the collector spaced out equally so there is no back pressure generated by the cylinders sharing the collector.
VA VIPERAM said:Absolutely Correct!!![]()
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In addition to this, equal-length headers can actually create a scavenging effect (if the rest of the exhaust system is also efficient) and pull the fuel mixture into the chamber faster than the downward motion of the piston (during overlap obviously). With a good exhaust system, unrestricted intake, ported heads, and good cam timing, you can actually get your volumetric efficiency above 100%. BTW - VE peaks at the torque peak.
Hey Silverback - I was watching the news today. You didn't lose a foot recently did you? :laugh: :laugh:
Silverback said:Now for the serious side of this discussion.
It would be really nice if Dan would come on here and explain his reasoning for not using headers. I would really enjoy listening to his side of this.
SERPENT said:Need your advice. Truck is supercharged with stock exhaust manifold,Boomer's cat-less mids and a Magnaflow catback. What HP gains ,if any can I expect by going to headers?Any dyno numbers available? What is the consensus on a brand? Lots of questions and have gotten different answers from three of our vendors.
Stinker said:DANG ! THANKS BRO!!:rock: :rock:
I knew there was something with the bisannis and the paxtons.
I jsut had it backwards!LOLL imagine that!![]()
When you gonna blow that thing up so we can put a monster in there:questionmark:
1Fast400 said:I have bellangers, magnaflow and no cats, 3" all the way and it is nasty sounding. It can be a little much at 80mph