Decat pipe for S2

[speedyellow]

Anyone know who do good quality decat pipes for toyota engined cars? Also anyone know if there are any problems with the O2 sensors etc when you remove the cat?

Thanks

[bogie]

try www.hangar111.com or www.elise-shop.com or www.eliseparts.com

if you remove the cat then yes the O2 sensors will report a fault and light the MIL on the dash therefore the car wont pass an MOT and you wont be able to tell if you get any real error codes ....you can geta MIL eliminator from the places that sell the CRP though.....to be honest, other than more noise theres not much point in de-catting anyway...more hassle than benefit IMO

[speedyellow]

If you get all the MIL light issues I'll give it a miss then and just let the supercharger ram the air through...

The main reason was to preserve the cat as it was flaming out the back on track under hard abuse which must be killing the cat... hum...

[Davey S2]

I have heard that putting a CRP on a Toyota engined car will actually reduce performance?

[speedyellow]

True on a NA car but with the supercharger you really want less back pressure. Anyway it was more to save the cat than get more power, I think in June as the warranty runs out I'll get them to check the cat and see if I can get a new one under free....

[bogie]

I run a 200 cell sports cat on my SC Honda and its certainly not restricting things - makes 290 odd bhp easy enough

if anything you could just geta sports cat....but I doubt you will gain anything

[jamieall]

2ublar has producing a high flow cat for SC cars rated to 375hp!

[speedyellow]

Thanks Jamie, I've dropped them an email!

The concern really comes from TVR days, when an S6 engine was used hard and spat the odd flame it melted the cat and then you had a blocked exhaust... happened regularly as well... it's not to gain power, just not to loose power really.

>> Edited by speedyellow on Sunday 23 April 17:03

[jamieall]

I will have one on the car as of Friday hopefully
give Jim an email
jim valentine <[e-mail]>

Cheers Jamie

[bogie]

if the car is spitting flames then the engine could be considered as 'poorly managed' i.e. the map in the ECU requires some work to stop it doing this ...yes it looks good ...but its not ideal

[speedyellow]

I spoke to Lotus Sport about the odd flame spitting and it's a result of the extra injector they use on the Supercharge conversion. The extra fueling casuing the flameing is something to do with getting sharp throttle response and will only happen in extreme circumstances, the 220S is mapped to avoid this and manage it's emmisions better but it looses a small amount of power and throttle response (FBW throttle is part of the solution).

[jamieall]

I know of at least one 220 which spits flames?? Guess they did not sort it as well as they thought!

[speedyellow]

You have to love Lotus at times don't you!!! lol

[speedyellow]

Well I collected my car after it's service from a hard few days at Spa and they have heard back from Lotus regarding the concerns about flames and life of the cat when the car is out of warranty.

Well Lotus found this out up front and all 240R cars have a high flow race cat fitted to them that can withstand a bit of flaming.... the longer I have the 240R the more bits and pieces I find they fitted to them....

Lotus Sport part number is ALS3S0001F if anyone is interested... they are different to the Cup and S cars I'm told