Equal Length downpipes

[germ]

Lookin for solid info on equal length downpipes.

From what ive researched they are supposed to match the pulse of the exhaust but the pulsation is dramaticly or entirely reduced by the turbos compared to n/a vehicles. Also in my mind the extra bending and length of the pipe would create more resistance to flow from the one turbo also adding some extra weight.

Have any comparisons been done between same size after market regular downpipes and equal length downpipes?

Im hoping to find evidence that the claims of better response/faster spool and power increase are true
All performnce camparisons ive found are between stock/small downpipes and equal length which oviously your going to have better performnce from a larger aftermarket pipe of any kind

So is the extra bend,length weight and price worth it?

[NismoS-tune]

with 20 some years of this car being around, it's all been done. Most people run a flex coupler in the front turbo to help but is not necessary. How would you run equal length with what little room is there? You'll gain better benefits from running no cat haha.

If you want badass, get a full titanium down pipe!

[Terrh]

I'm assuming you must be talking about a GTR.

I had EL downpipes before (2.5" into 3") and I'm getting my new downpipe made equal length (upgraded to 3" into 4") after driving on it for a while. I'd sell the old one if you were interested.

I would say there's zero power benefit from it. Maybe some but there's no exhaust pulses to speak of after the exhaust has gone through a turbocharger.

i'd also say there's no power decrease - the extra bends are large in diameter and really not a big deal. The extra weight is minimal too - maybe a pound tops.

The big difference is the exhaust note. Hard to explain but the car just sounds far better with an equal length downpipe.

I FINALLY found a great video to compare!

http://www.youtube.com/watch?v=If-svOm93I0&feature=channel&list=UL

(stock downpipe)

http://www.youtube.com/watch?v=9pXNNO3WM3Y

(equal length)

See how much better/smoother it sounds?

[germ]

This may sound crazy but i think i might like the first non equal length downpipe note more. Maybe because its lower than the equal length note maybe because its indoors...

Also this is comparing oem to equal length not an aftermarket to equal length but i see what you mean sounds more tuned.

It would probably sound lower on my 3.5 catback

[Terrh]

EL pipes make a higher note than non EL.

[Black BNR32]

my research from a couple months ago found zero proven performance benefits from equal length. myself and my fabricator decided on non-equal for my custom front pipe due to ease of fabrication, ease of assembly/disassembly, and lower cost. my recent thread has pics if it helps.

[Bigalow]

It's hard finding good information on this subject. I've been trying to figure out which is best: equal length vs unequal length front pipes (aka down pipe, runners). This site was the only thing I could find on the subject:

http://www.skylife4ever.com/2011/02/exhaust-overhaul.html

Otherwise, I'm leaning towards the unequal length since the stock/NISMO design is the same.

[Bruizer]

year old thread but the best sound is equal length.
Funny thing is, the outlets aren't equal length so really you'll never find a true equal length setup unless you go single!