2bular "Track" system

[quantum2000]

So finally received my 2bular "track" system complete with carbon tips and additional add on titanium silencers for quieter track days.
My word does it pop, bang, crackle and scream now......videos and dB readings to follow.

[Fortis]

I wish I hadn't clicked on to view this now 

That looks ace, I bet you are really pleased with it.

Looking forward to mine arriving soon  

[ChrisBuer]

Looks great. How easy is it to swap the ends over once the exhaust is on the car?

I've been thinking about asking Jim to make some additional silencers for my car. 

[quantum2000]

Its a bit of a fiddle, but basically unbolt and remove the carbon tips. You can just about manage this by laying on the floor.

The titanium silencers attach using springs. (pic below) the back box has the same mounting points. Hardest part is trying to stretch the spring and hook it on. I may have to look at purchasing some ramps to reverse the car onto to make access easier.

[RedViper]

Hells Bells does that look sexy!!

I have the exact same thing on order.. Latest from Jim was this week but I know he can get rail roaded by exhaust emergencies so trying not to get my hopes up to much but looking at yours has done the exact opposite.

I did think he was going to put a 45 degree bend angling downwards on the add-ons though.. Maybe it wasn't required.

Nice bit of kit to say the least

Edited April 6, 2016 by RedViper

[quantum2000]

1 hour ago, RedViper said:

I did think he was going to put a 45 degree bend angling downwards on the add-ons though.. Maybe it wasn't required.

Nice bit of kit to say the least

Jim told me the same, but then changed the design to this? 

I tried the titanium silencers last night and it did "dull" the sound down, but until I take some sound measurements I cant be 100% certain its track legal for all UK tracks.

With the carbon tips its loud, a lot louder than standard with the exhaust valve open, although once above 5000rpm it screams, but then not necessarily any louder than the OEM system. 

There's no drone either, its just loud lol

[sieger]

Wow!

Looks so good...and the carbon tips really suit so much better than the stock one. 

Although, I can't really see how the Ti tips are going to be the difference between being "legal" or not for trackwork-let alone road use!!! 

[quantum2000]

47 minutes ago, sieger said:

Although, I can't really see how the Ti tips are going to be the difference between being "legal" or not for trackwork-let alone road use!!! 

Imagine them as mini bike cans

http://www.morebikes.co.uk/inside-motorcycle-exhaust-choosing-end-can-bike/

Example of a design on a V6 CUP R

 

Edited April 6, 2016 by quantum2000

[LotusPilot]

Perhaps a silly question, but are protruding pipes "street legal" under construction and use regulations?

 

Edited April 6, 2016 by LotusPilot

[quantum2000]

I'd probably just get away with the titanium pipes, If I use the IVA "standards" 

An exhaust tailpipe must not project beyond the floor line lying directly above it by more than 10mm, unless it terminates in a radius of curvature of at least 2.5mm and in all cases project no more than 150mm. In the case of side mounted exhausts the tailpipe must terminate no more than 50mm from the extreme outer edge of the vehicle.

[LotusPilot]

... or it'll be spanners job when you get to the track.

The carbon tips look great btw!  I look forward to seeing (and hearing) them.  Are you going to Brooklands - or do I have to wait for Chatsworth?

[quantum2000]

To be honest I'll change them at the track, I'm not sure of the long term durability of the "spring" connection.

Worth noting though that the titanium add-ons only weigh approx 400 gram.

It will probably be Chatsworth, although now the weathers improving I might pop along to the Hill top farm Lotus drivers clubs meets. I still attend the MLOC "fish" and "Shardlow" meets

[stratosboy]

Agree that looks great, especially with the carbon tips.......mmm next upgade me thinks!!

can you post a vid of how it sounds going through the rev range?

 

[ChrisBuer]

I'd imagine the exhaust will sound similar to mine with the valve open?

Here are a couple of videos and a photo

[TonyKL]

This is not something I wanted to read (ok, maybe just a little).  I do miss my larini on my Sprint and would love a few more pops but don't want to compromise trackdays.  Be good to know the db with the silencers on.

Although I do like having the valve when I want to be quiet.

Edited April 6, 2016 by TonyKL

[CocoPops]

Glad to see it finally exists.

[quantum2000]

4 hours ago, CocoPops said:

Glad to see it finally exists.

It was certainly a long time coming...

[CocoPops]

I was supposed to receive the first Evora NA track system... First discussed and requested last May

 

[quantum2000]

14 hours ago, ChrisBuer said:

I'd imagine the exhaust will sound similar to mine with the valve open?

Here are a couple of videos and a photo 

Sounds very similar to the valve open, pops a little more on overrun 

1 minute ago, CocoPops said:

I was supposed to receive the first Evora NA track system... First discussed and requested last May

 

Mine was ordered and paid for in September

[quantum2000]

Managed to make a vid with the carbon tips attached, before the rain started. Hopefully get the second video with the titanium "cans" tomorrow.

 

[NW76]

Nice ;-) Really like this ... the 2Bular doesnt have a valve, right?

[quantum2000]

Correct, no valve on the "track" system 

[redspeed]

I haven't had a look to see exactly what's there, but what do you do with the redundant wiring/connection that normally goes to the valve once it becomes redundant?

Thanks.

[quantum2000]

I'm not sure to be honest, the Lotus dealership fitted mine. I presume is secured out of the way somewhere.

[LotusPilot]

Jeff

As a Lotus dealership swapped the silencer, then it may be reasonable to assume that the job was thorough...

The vacuum control valve (usually situated on the inboard side of the left engine subframe - immediately below the gap formed between the rearmost side of the airbox and the coolant expansion tank) will have been disabled using Lotus Tech Centre.  This functionally disables ECU-control and electrical-integrity monitoring of the control valve by the ECU.  

NB: if disabled by Lotus Tech Centre software, unless the exhaust control valve is re-enabled in the ECU, replacement of the silencer with a valved system will not restore normal operation of the switching valve.

If the control valve has been disabled, it may have been removed.  However, if still monitored by the ECU, it must remain electrically connected - as otherwise the ECU will throw an error and display the check-engine lamp - and may limit engine output.

Notwitstanding the above, with removal of the valved silencer, the associated vacuum line will need to be "plugged" at some point along its path...

From the airbox vacuum reservoir (itself fed from one of the three vacuum ports on the left side of the supercharger), a short black vacuum hose leads to a T-piece; one side of the T continues forward to feed a vacuum control valve in the induction system, the other (usually a red hose) feeds the upstream side of the exhaust vacuum control valve (located on the engine subframe described above); the downstream switched vacuum line of the solenoid control valve routes to the valved silencer.  

If not entirely removed, the vacuum line should have been disconnected and plugged somewhere between the T-piece and the valved silencer.  Only inspection will determine what has been done.