turbo down pipe diameter question

[Dr HMS Derv Destroyer]

as above, I have no catt on my dci anymore ( ghetto de- internal )
now the big f**k off can is somewhat not efficient I presume just being a big space for gases to collect

now I have a few lengths of exhaust piping , 2" and nearly 2.3"
are these to small to put in place of the hollow can ?

thinking of turbo back pressure from these might be to much

chip, if you answer this, please put it in somewhat noob terms as im not all that clued up on exhaust systems

 

[Dr HMS Derv Destroyer]

anyone ?:dapprove:

 

[Jaff.]

4 inch. Hero time

 

[Dr HMS Derv Destroyer]

lol that's probs the size of the hollow cat atm....
and we are talking about a diesel here jaff! not a turbo'd meggy engine

 

[Jaff.]

Leave room for improvment that's what I was told when I went for a meager 3inch down pipe

 

[Dr HMS Derv Destroyer]

im going with 3inch pipe i think. smaller than the hollow cat but the flow must me better surely

 

[Owen_m]

You could just use the same size pipe as the rest of the exhaust. If your just removing the cat.

 

[Dr HMS Derv Destroyer]

its the fact its so close to the turbo exhaust outlet, the pressure from the standard size pipe might caulse issues later on.

 

[Owen_m]

Shouldn't think so if you just pipe that's the same size as the turbo exhaust. Then it'll make no difference. If you have a wider exhaust from the turbo back then you'd have less back pressure and quicker spool up.

 

[Dr HMS Derv Destroyer]

haha I don't want to lose my spool up speed ! I felt s**t before decatting

 

[Owen_m]

You won't lose any spool up speed bro. It'll be the same because the pipe will be the same all the way along. As long as you don't go smaller than the original diameter.

 

[Dr HMS Derv Destroyer]

i'll stick the 3" on to be safe lol, only down side is it will sound more of a combin harvester now

 

[Owen_m]

Fair play bro, I need to decat mine badly !!!

 

[Dr HMS Derv Destroyer]

do it, I did a guide on here for the decatting process.
altho you work on diesel's so you should be able to do it

 

[Owen_m]

It's a lot of effort though. This is my main problem

 

[Dr HMS Derv Destroyer]

half hours job worth if access to ramp is avail
least you have more effort for the mx5

 

[Owen_m]

haha yeah the mx5 is coming along nicely need a load of money to put in to it really