Exhaust port dimensions?

[radar]

Guys, can anyone tell me what the exhaust port dimensions are on the R3? I news the width and height. Measuring the pipe in situ is very difficult and it's a real ball ache to have to remove the headers to get the dimensions if someone has already done it. I need the dimensions to order some flanges for a custom header I'm having made. Cheers guys

 

[xhdskip]

Don't know, but I sure want to see them headers when you get them made.
you plan on selling any?
What tune you gonna run ?
questions questions questions.

 

[Toystoretom]

Let me ask a silly question:

Do you need all the measurements? As in:

Location of the stud holes.
Size of the stud holes.
Distance between one exhaust port to the next.
Height and width of the port.
Shape of the port. (It's not rectangular but has rounded corners).
Internal shape. (The exhaust port in the head is split)

You may want to take your stock headers off and study them a bit. I'm not trying to rain on your parade but others have gone to great lengths to get this done correctly and have failed to get them to even fit up right, much less give an increase in HP. There is a science to this.

Ask anyone who has fitted up Jardines to their bike how critical fit is, and if the shapes aren't right they won't seal.

I have stock headers sitting on my workbench but I can't give you radius's on the corners and the like, or the internal shapes built into those pipes.

 

[jlm205]

tell your custom pipe guy good luck!!
--he'll have to machine the oval-to-round cosworth type exhaust flange.
--unless i'm unaware of something new you can't just order a set of flanges??

 

[radar]

Thanks for the replies guys - I've dropped my bike off at the shop.

I'm fortunate to live in a part of the world where a lot of F1 teams are based. This makes it relatively easy to gain access to awesomely skilled engineers. My exhaust guy works in the autosport arena; he subs out the exhaust flanges and bends the pipes himself. I was looking to get a start on the flanges so I could have the bike done for the Easter weekend (probably piss it down being the UK anyway!) This is no Mickey Mouse outfit he has made pipes for some teams in the upper echelons of autosport so I have no doubts that the correct science will have gone into the design - more so than the bloody awful looking stock system!

I'm having a 3:1 equal length system and being silenced by a titanium street legal Akrapovic can. My inspiration is the old Cosworth DFV F1 engines which I think the exhaust manifold looked incredible. My mans brief was to create a serpentine 'swoopy' system. I'll post pictures when I pick the bike up in two weeks.

 

[jlm205]

radar--you are in the correct geographical area to find guys skilled in the cosworth style.
maybe he'll be able to sneak some Stainless Steel or even better yet , Iconel , from the "scraps/drops" 4 wheel pile!!
looking forward to pics of these new ones!!

by the way--your mclaren F1 team got their asses handed to them in aussie land last week-end by ross brawn's new team!

 

[Power-Tripp]

I'm having a 3:1 equal length system and being silenced by a titanium street legal Akrapovic can.

Don't get wrapped up in the equal length issue. Get the bends smooth, the lengths close to optimal, and the collector merge right. The R3 cylinders each tune differently for many reasons, and a few cm of difference will not show as much of a difference as keeping all primary tubes similar temps, and getting the merge and collector length right.

Inline engines are more sensitive to primary length and temp than collector length and temp, but the primary merge design and angle is important - as is the collector diameter and any diverging cone angle (if used).

I hope this helps.

 

[radar]

Work in progress - The pipes are being polished and I pick the bike up Monday. I'll post better images then

 

[Molinoman]

I kinda liked the stock pipes, it leaves me with lots of money for the other "stuff" for the bike. Besides it's fast enough for me (and Flip and Baggage1), more than enough to nail down some serious speeding tickets if we wanted.

But to each their own, hope you enjoy the "increased" performance and sound.

Dennis

73 dtg Dubai
74 dtg Home

 

[xhdskip]

I would think you'd still need some sort of heat shield for your knees.
But they look good so far.