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Old 12-01-2009, 02:05 AM   #1
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Default EFRA numbers... Help

Hello all,
I am pretty new to the nitro scene. I have been looking into getting a new pipe and have seen EFRA numbers. I have looked into the EFRA it seems to be more or less a euro sanctioning body of rc...

Long story short is a pipe manufactured by two different companies with the same efra number for the most part going to be the same thing design and performance wise and the differance comes down to things like build and material quality???

ooooooorrrrr... are they two completely animals all together?

Thanks for your input!

Jonathan
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Old 12-01-2009, 02:48 AM   #2
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The EFRA number is a homologation number. In other words, every exhaust carrying that number needs to be a copy of the one that is homologated.

Mostly a different brandname is just written on it by the original manufacturer (OEM)
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Old 12-01-2009, 11:47 AM   #3
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so for instance i am looking at the 2013 for my new werks b5 and any company that makes a 2013 pipe will be the same thing?
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Old 12-01-2009, 12:05 PM   #4
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Originally Posted by MangDeezy View Post
so for instance i am looking at the 2013 for my new werks b5 and any company that makes a 2013 pipe will be the same thing?
If the EFRA number is the same yes, they are identical pipes.
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Old 12-01-2009, 12:10 PM   #5
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The 2013 is published by many names as Mega, Sirio, RB etc. All were made by Starmotor as also the Werks engines and pipes.

Yes, a 2013 is a 2013 and may not be different than a 2013
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Old 12-01-2009, 12:32 PM   #6
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SO this means all 053 and 086 pipes are the same?!
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Old 12-01-2009, 12:37 PM   #7
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SO this means all 053 and 086 pipes are the same?!
No way. Close. They all have slightly different manifolds also. Slight differences in materials and wall thickness make them resonate a little different. Alot of the differences are picked up on the dyno, but they are so close it's hard to tell on the track.
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Old 12-01-2009, 12:48 PM   #8
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SO this means all 053 and 086 pipes are the same?!
you dont see efra numbers designated to most 53 or 86 based pipes
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Old 12-01-2009, 12:50 PM   #9
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Originally Posted by Amoeba View Post
If the EFRA number is the same yes, they are identical pipes.
just dont make since why they would use the same number on another pipe if they're not the same thing
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Old 12-01-2009, 01:26 PM   #10
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you dont see efra numbers designated to most 53 or 86 based pipes
I believe 086 and 053 were the original Novarossi numbers. They were homologated by EFRA as 9886 and 9853. Since they are no longer legal in europe (at least in onroad, not sure about offroad) they don't put the EFRA numbers on them anymore. Because of this, I believe some of the cheaper 086 and 053 pipes are copies made by someone other than Nova so the differences may be greater. Not sure about this though.

Pipes with the same number but with different brand names are usually the same pipe; however, manufacturing differences can lead to different performance even within the same brand. Plus, manifolds can be quite different. For example:

I used to have two onroad 2015 pipes. One was a JP, the other was a Top I think. The pipes were IDENTICAL except for the name but the manifolds they came with were totally different. They didn't even look the same. The JP manifold on either pipe resulted in more top end, less bottom and much worse fuel mileage.
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Old 12-01-2009, 02:37 PM   #11
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Originally Posted by Amoeba View Post
If the EFRA number is the same yes, they are identical pipes.
from technical point of view. yes, but sometimes they can differ in material quality if they are really manufactured by different companies and not just rebranded
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Old 12-01-2009, 03:07 PM   #12
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just dont make since why they would use the same number on another pipe if they're not the same thing
Probably a case of difference between "brand" number/name and EFRA number designation, as wingracer points out earlier.

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from technical point of view. yes, but sometimes they can differ in material quality if they are really manufactured by different companies and not just rebranded
A company can get a design EFRA homologated and a number assigned and then license that design to other manufacturers, this happens all the time in other industries with similar certification bodies.

I doubt EFRA takes into consideration materials composition/heat dissipation (which would cause a change in performance if you had an identical pipe but one in billet aluminum and the other in tin/gold/playdoh/whatever). More likely it's just physical dimensions and acoustic characteristics when they do the homologation testing. Based on the information I've managed to find in the EFRA rules and documentation it is only acoustic-related testing. If this is the case, that would explain the technical differences you're pointing out with some manufacturers using a design but choosing different materials... as well as difference in manifolds affecting performance for pipes that aren't one-piece.

With all that in mind, for most intents and purposes if you got 2 pipes with the same EFRA number, their performance is going to be pretty damned close to identical.

Have we sent the OP into a coma with all this info yet?
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Old 12-01-2009, 07:07 PM   #13
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Originally Posted by Roelof View Post
The EFRA number is a homologation number. In other words, every exhaust carrying that number needs to be a copy of the one that is homologated.

Mostly a different brandname is just written on it by the original manufacturer (OEM)
I read the EFRA rules in its entirety and couldnt come to this conclusion. Perhaps my reading comprehension just isnt that good but about the only thing that I could surmise to be the same was the db level.
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Old 12-01-2009, 10:02 PM   #14
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I read the EFRA rules in its entirety and couldnt come to this conclusion. Perhaps my reading comprehension just isnt that good but about the only thing that I could surmise to be the same was the db level.
If a pipes dimensions and design are not identical to the one originally submitted, it must be sent in for testing and assigned a new number. Sirio ran into this at the TC worlds when the pipe they were using had a different stinger design than the originally submitted pipe. It was therefore banned for the mains.
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Old 12-01-2009, 10:04 PM   #15
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Originally Posted by Amoeba View Post
Based on the information I've managed to find in the EFRA rules and documentation it is only acoustic-related testing.
I imagine sound levels are the only thing actually "tested" but EFRA does have strict guidelines about the design and dimensions of the pipes as well.
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