im doing a couple of tweek's to my car, i want to re route my catch can pipes, at the moment the 3 breather pipes go into the catch can then back to the inlet pipe, i want to blank the inlet pipe off and just run the pipes to atmosphere after the catch can, its a classic currently mapped to 310 bhp, im just wondering if this will effect the map? what do you think?

 

no, if anything you are making things better.. any oil vapour previously would be reducing the RON of the mix.. but now, no chance of it entering the engine therefore making things better.. Not that I would expect you to see much oil going through.

Simon

 

cheerz simon, i just was'nt sure if blanking the inlet pipe would change the amount of air going through the inlet pipe.

 

Shouldn't do as it would just be creating a vacuum on the breathers.. assuming there is no leak in the catch can pipework..

if it is a big leak you will know as soon as you do it and it would have been noticed at mapping time most likely.

Simon

 

cheerz mate, i was also thinking,will all the vapours come out the engine as good with the catch can vented to atmos? cause i suppose they get sucked out with it connected back to the inlet pipe.

 

in theory no they won't.. but in practice I have not seen any determental problems with my engines not doing so..

 

thanks mate

 

I've done same to atmo as although mine has a big catch with breather cap, It was still sucking in oil. Mine was mapped after (as was having remap anyway) but I'm sure yours will be fine.