custom exhausts

[ForcedFirebird]

Actually, you both are correct and arguing the same point, just on opposite sides of the fence. While, yes, a straight pipe might have little savaging effect, it does have some. There are three variables when discussing exhaust pulses, heat sound and volumes. We all know the laws of physics and how they work, as the gasses cool, they expand, thereby moving faster because, effectively, the pipe has decreased in diameter due to the gasses taking up more volume. Furthermore, you have resonator(s),and the end of the pipe to take into consideration. Think about how a siphon gun works - air blows across and opening and creates vacuum. Sound plays in all this, as you both know, since sound-waves themselves are traveling faster than the gasses are.

Stereoinstaller, I plan on proving this whole "keep the banks separate" mentality with better designed merges and timing the pulses to quiet the exhaust as well as scavenge.

[StereoInstaller1]

yes, I know what it is. but it only happens where two pipes merge together, not in one continuous pipe. Otherwise you wouldn't have headers, you'd have individual pipes for each cylinder.

That is just silly. Both of the links posted disagree with what you said here.

Scavenging happens in 1 pipe, it is NOT only a function of collection.

and ALL of the highest possible peak performance engines use single pipes per cylinder, the stuff that does not care if it has a powerband or not, like top fuel and funnycars.

[StereoInstaller1]

Actually, you both are correct and arguing the same point, just on opposite sides of the fence. While, yes, a straight pipe might have little savaging effect, it does have some. There are three variables when discussing exhaust pulses, heat sound and volumes. We all know the laws of physics and how they work, as the gasses cool, they expand, thereby moving faster because, effectively, the pipe has decreased in diameter due to the gasses taking up more volume. Furthermore, you have resonator(s),and the end of the pipe to take into consideration. Think about how a siphon gun works - air blows across and opening and creates vacuum. Sound plays in all this, as you both know, since sound-waves themselves are traveling faster than the gasses are.

Stereoinstaller, I plan on proving this whole "keep the banks separate" mentality with better designed merges and timing the pulses to quiet the exhaust as well as scavenge.

With no crossover of any sort?

I do wish I could weld, or that I had discretionary income. Neither is gonna happen soon...

[ForcedFirebird]

With no crossover of any sort?

I do wish I could weld, or that I had discretionary income. Neither is gonna happen soon...

What do you mean, no crossover? I am talking about having a single exhaust pipe in the end. What happens between the exhaust valve and merges I select is the determining factor ;)

Not a lot of us have "discretionary income", but some of us do have access to equipment. You want to weld, do as I did and start helping someone out who knows the ropes and volunteer time in exchange for knowledge and/or access to equipment. You can have time, money, commitments - pick two. Why do you think things don't happen on my own vehicles as fast as they could. Two jobs, four kids, and soccer season is starting soon (3 will be playing this yr) woot woot!

Both you guys like exhaust theory so much, you should check out pipemax software.

[MonkeyMadness]

What do you mean, no crossover? I am talking about having a single exhaust pipe in the end. What happens between the exhaust valve and merges I select is the determining factor ;)

Not a lot of us have "discretionary income", but some of us do have access to equipment. You want to weld, do as I did and start helping someone out who knows the ropes and volunteer time in exchange for knowledge and/or access to equipment. You can have time, money, commitments - pick two. Why do you think things don't happen on my own vehicles as fast as they could. Two jobs, four kids, and soccer season is starting soon (3 will be playing this yr) woot woot!

Both you guys like exhaust theory so much, you should check out pipemax software.

+1.. woot woot
come by my shop...
I'll teach you how to fab and weld, mig or tig...
I have a machine shop too...

[ForcedFirebird]

+1.. woot woot
come by my shop...
I'll teach you how to fab and weld, mig or tig...
I have a machine shop too...

Amazing how quick we want to teach, eh? Nothing like getting the perfect bead, speed/feed rate for the first time. Just makes a particular sound, two metals making something in the third person.

[StereoInstaller1]

I am a god to MDF farmers around the world.

Funny how you talk about that sound: MDF is the same. I use a 1/4" crown stapler when building and there is a particular "thwap" that means you have a nice tight joint vs. when the 2 pieces aren't tight against each other you get a "THUNK" sound...