9 replies to this topic

[Tomm]

Hello Chaps,

 

I am after a LCB style performance manifold for my SPI mini.

 

I am on the brink of buying a specialist components system but thought I would see if anyone has anything else to offer.

 

Located in the South east, preffer to collect with cash.

[Guess-Works.com]

Don't, unless you get one which has the lambda sensor in or after the Y piece underneath the car..otherwise your lambda is only sensing from cylinders 1 and 4

 

My personal preference with injections is to connect a good quality downpipe to the manifold and Cat, and then a decent free flowing exhaust after the cat, I'd also suggest renewing the cat especially if it's the original one to the car it's probably 20+ years old and covered with all sorts of grot.

 

eg...

 

http://www.minispare...t/C-AEG371.aspx

 

and

 

http://www.minispare...e/C-STR811.aspx

 

don't forget to renew the metal gaskets aswell...

Edited by Guess-Works.com, 21 July 2014 - 01:34 PM.

[Tomm]

Thanks for your input guess works, I've always valued what you've had to say, because it's right!

Would this be suitable?

I can always weld my own Lamba boss in.

http://www.maniflow....55&product=1115

[R1minimagic]

I have a recently new LCB but without lambda boss, if you still want to weld one in PM me

[psmini]

I got a new down pipe fitted at ATS. Was about £90 and made a big difference, he said the old one looked like it had never been changed from new! Performance is better too. Hope that helps.

[Guess-Works.com]

Thanks for your input guess works, I've always valued what you've had to say, because it's right!

Would this be suitable?

I can always weld my own Lamba boss in.

http://www.maniflow....55&product=1115

 

I believe thats the same pipe as the minispares one, and obviously as you're using the cast manifold the lambda sensor stays where it is in the manifold.

[R1minimagic]

Also, if you are going to weld one in, make sure it is in the same location, otherwise the temperatures and flows will be different.

[exuptoy]

Is the lambda in 1&4 gonna make much difference then?

[R1minimagic]

In theory, the best approach would be to have a separate lambda sensor for each cylinder but nobody does that as it would be too expensive!  That way, you could optimise the combustion much more effectively.  Some OEMs use multiple lambda sensors but this tends to be on V engines (V6, V8 etc).

 

As long as everything is working properly, it wouldnt make much difference, its only when you get an issue that something emerges.

 

I am not sure if the mini has a heated lambda sensor....if so, its not a good idea to put it further down the exhaust pipe as it will be calibrated to only start heating once it has passed its dew point (i.e. water is not condensing on it).  For this reason, the lambda sensor is not used for the first 5 or 10 minutes after engine starting, it uses the ECU modelled value for lambda instead.  Turning it on too early would shorten the life of the sensor quite dramatically.

 

In my experience, using a LCB with the lambda in the same position (i.e. close to the engine) has not given any problems with fault codes etc.  These would be quickly flagged if the lambda value from the sensor did not agree closely with the modelled ECU lambda value, so it is quite practical to do this.

[exuptoy]

Surely the stainless SC LCB with the lambda in the 1-4 collector must flow better than a standard manifold?

Only around £110 as opposed to £85 for a downpipe.

Edited by exuptoy, 21 July 2014 - 08:37 PM.