My Audi S2 600Hp+ project 56k warning

[rash]

not mine but for sale in germany:

[Rusty]

Andy: tought you were on about exhaust, not DP

Just comparing the two sections, the 2x3" pipe is around 10% larger area but has 50% more surface area.

Looks well mate there Terry, I'll be after a nice side exit myself at this rate, if I can't make it go faster then I can sure make it sound faster

[Rusty]

It was your comment that total diameter was 6", which wasn't true, just being an anally retentive engineer... old habits and all that.

As you say Alex, it's still F'ING BIG!

[lind4hl]

Andy: tought you were on about exhaust, not DP

[terrybullwon]

It's not diameter but area and don't forget that 2 smaller pipes have more surface area and thus more losses at the surface.

2 x 3" pipes gives 14.13 inch^2 area and 18.85" total circumference.

1 x 4" pipe gives 12.56inch^2 and 12.57" circumference.

Based on that I'd say there wasn't much in it really between the 2 3" pipes and single 4" pipe

Thats quite a bit,

If you hold a 4" pipe and 3" there is alot of difference instantly.

But its not a pissing competition its just a exhaust

[Rusty]

Andy, no offence, but this car would run great with single 3,5"..

dual 3" is waaay more than that..

You what? I was commenting on Terry's comment that 4" is much more restrictive than 2x3", the difference isn't as much as you might think.

[lind4hl]

It's not diameter but area and don't forget that 2 smaller pipes have more surface area and thus more losses at the surface

Andy, no offence, but this car would run great with single 3,5"..

dual 3" is waaay more than that..

Um.. every thing you "mock" up will move when you weld it. I wish you luck doing that way.

Total diameter of the exhaust at that point is 6" so i very much doubt it, smallest is the 4" down pipe

Interesting.... ok cool cheers for that, either way it looks flippin cool, good job

[Rusty]

It's not diameter but area and don't forget that 2 smaller pipes have more surface area and thus more losses at the surface.

2 x 3" pipes gives 14.13 inch^2 area and 18.85" total circumference.

1 x 4" pipe gives 12.56 inch^2 and 12.57" circumference.

Based on that I'd say there wasn't much in it really between the 2 3" pipes and single 4" pipe

[terrybullwon]

Havent got a clue at the mo, theres a welder near me that can weld anything so if i can mock it up and all hes gotta do is weld that should keep the costs down.

Wont those 90 bends be a bit restrictive there?

Um.. every thing you "mock" up will move when you weld it. I wish you luck doing that way.

Total diameter of the exhaust at that point is 6" so i very much doubt it, smallest is the 4" down pipe

Mine sounds pretty good, considering its a 4" down pipe. How do you plan to make it?

Haywood and scott wanted close to 2k for what i built

Havent got a clue at the mo, theres a welder near me that can weld anything so if i can mock it up and all hes gotta do is weld that should keep the costs down.

Wont those 90 bends be a bit restrictive there?

[lind4hl]

Just ask mate!

[terrybullwon]

Loving the exhaust, very similer to what i want to achieve but with keeping it under the noise regs for the track somehow....

I didn't know dremel did a welding attachment Gary?!......

Mine sounds pretty good, considering its a 4" down pipe. How do you plan to make it?

Haywood and scott wanted close to 2k for what i built

[terrybullwon]

lol, ill make it myself i think remember i´m the teacher

Very good point!

I guess you wont be giving me any more hints and tips

[s2_bo]

Thanks for the pics James! !