chiromikey

that's what i thought...thanks. i didn't think it would be much different than the 55k motor but without owning a 63 i wasn't sure.

c32used

Mathmik

We want DYNO sheets ... before and After ones

MB_Forever

+1 dyno sheets will either put these headers on the map or sink them

jrcart

I have Longtube header dyno sheets to compare them to, except I also had the X-pipe. Rick, what does the rest of your exhaust and mod list look like? No use comparing them if they are not somewhat apples to apples.

chiromikey

actually, post frequency seems to dictate what products sell around here.

rarfinancial

RUMBLE RUMBLE production begins in 2-3 weeks

LZH

rarfinancial

I don't get how that belongs in this tread

Havoc

Any plans for the rest of your exhaust?

bobgodd

The headers look good, I have one question though: I'm curious why the collector is so small; the merge of the collector looks very good, but why the pinch point??

jangy

ground clearance?

jangy

With a new tune, I'd guess a 63 gets sweet gains from long heads. You had shorties before, right? What tune are you running with them?

chiromikey

MJ50

+1

LZH

Difficult to tell from the pics.....but these do not look to be equal length long tubes...

jrcart

I just noticed the same thing, could be an illusion but it looks like the tubes are four different lengths. Not sure why they would do that on longtubes???

MB_Forever

There are more pictures here.....

https://mbworld.org/forums/c63-amg-w...tube-pics.html

LZH

Yeah - side to side as well....

jangy

Key is pressure pulse....

LZH

Yes Jangy, thanks...and having UNequal length means different pulse and velocity in the exhaust gas.

bobgodd

I posted an article in one of the last exhaust threads but I don't think anyone read it. Equal length headers aren't quite so necessary in a V8 as they are in say a inline 4 cylinder. The exhaust pulses in a V8 are already uneven, so the equal length primaries don't really offer much.

Chadillac2000

I've heard this as well before. But even though they aren't necessary it seems if you were to going to go ahead and tackle building longtubes that you'd go ahead and make sure they were equal just to maximize power output incase there were a few horsepower to be had.

LZH

Exactly. I mean if your alread in there

c32AMG-DTM

The question may become (at least, in my non-exhaust-engineer's mind) "in this application, are fatter tubes better, or equal-length runners better" - from the pics, this setup looks to be as compact as possible, with little wasted-space; perhaps unequal is the only way to fit pipes this big? If you could (hypothetically) fit 1.5" pipes equal length, or 1.875" pipes unequal, which approach would net the better performance returns?

Agree w/ others; the dyno results will be interesting to see.