5 replies to this topic

[Ade-Cooper]

Hi folks,

Couple of questions- firstly is there any difference between an injection rc40 and a carb.. length or shape?

Secondly is lcb with rc40 the best way to go? What bore is a standard rc40 aswell please?

Thanks in advance folks

[unburntfuelinthemorning]

The version normally used with carb models is longer and will connect directly to an LCB manifold for instance. 

 

The version for models with a catalytic convertor is shorter and bolts on behind the convertor.

 

You probably shouldn't prioritise changing the manifold on an spi unless you have modified other areas of the engine a lot as the standard manifold is a sort of LCB type of design anyway and reasonably efficient.

 

A cat-back RC40 would be beneficial though to get rid of those horrible silencers.

 

The RC40 is a nice and sensible 1³/₄" diameter.  Inside diameter if I remember correctly.

[Ade-Cooper]

The version normally used with carb models is longer and will connect directly to an LCB manifold for instance. 
 
The version for models with a catalytic convertor is shorter and bolts on behind the convertor.
 
You probably shouldn't prioritise changing the manifold on an spi unless you have modified other areas of the engine a lot as the standard manifold is a sort of LCB type of design anyway and reasonably efficient.
 
A cat-back RC40 would be beneficial though to get rid of those horrible silencers.
 
The RC40 is a nice and sensible 1³/₄" diameter.  Inside diameter if I remember correctly.

Thanks buddy! That helps a lot!

[cal844]

Personally I'd get rid of the cat too... the car should still pass the emissions

[unburntfuelinthemorning]

Personally I'd get rid of the cat too... the car should still pass the emissions

Can you show evidence of that being legal.  I'm not saying it isn't but Ade-Cooper will need to be 100% certain when it comes to MOT time.  I agree though, get rid of it if you can, it'll smell like a proper car again.  You'll need to keep the oxygen sensor.  I'd say the most restrictive part of the system at the moment though are the silencers.

[cal844]

As long as it's pre MPI it is legal, my 1994 carb car has a non cat link pipe fitted, it passes every MOT. I simply say it's a carb mini, every pre MPI mini can pass without it.