[tuju77]

I found this on indonesian motor forum, down pipe for D40, the seller claims it will spool up the turbo faster, is it true guys?

Not yet ask for the price

:cheers2:

 

[jackhon]

Of coz.....no more restriction flow with cat...

 

[tuju77]

Of coz.....no more restriction flow with cat...

I already moved the honed inside the cat, would like to know if installing this down pipe will improve performance

 

[Done-it-all]

It will improve it yes, just watch out for different fitting from euro 3 to 4 then there is a difference with the auto too.

 

[Warpa]

Thats way too big to fit a euro 3 and i cant see it making any difference to taking the baffles out of the decat. Have you seen a euro 4 cat with the baffles removed? its a smooth clear run :thumbright:

If that is for a euro 4 its a shame its not available over here.

 

[tuju77]

Mine is thai's build with no dpf and the honed inside the cat already removed .

 

[Bluenavara]

I'd go for the downpipe even if you have a hollowed out stock cat housing.
Have a look at the diameter and radius of that first bend directly after the turbine flange on the stock housing (courtesy of (ex) forummember Sirnixalot). Horrible. It's an approx. 110-120degree bend, and it's less than 2" in diameter at the tightest point. Now compare that to the same bend on the downpipe in the opening post. Huge difference.

 

[tuju77]

@blue

I got it, u mean the bend caused restriction right???

 

[Kiwibacon]

The factory dump pipe is still much bigger than the turbo exit is. If you're looking for a bottleneck I'm not convinced this is it.

Has anyone put a pressure gauge on the exhaust to find out what backpressure actually is?

 

[Bluenavara]

The factory dump pipe is still much bigger than the turbo exit is. If you're looking for a bottleneck I'm not convinced this is it.
Has anyone put a pressure gauge on the exhaust to find out what backpressure actually is?

The factory dump pipe starts out exactly as big as the turbine outlet, no problem in itself. But that first bend, about 70 degrees on the aftermarket dumppipe pictured by the OP, is much more extreme on the stock dumppipe. In part to create room in front of the firewall for the cat/dpf housing, of course, as well as to keep up EGT's for the cat, I suspect.
I don't know of someone who put an exhaust pressure gauge on the stocker, but I'm fairly sure that nearly all with an aftermarket DP report better performance in general. Me included.

 

[Warpa]

Armchair tuning specialist having his say here :lol: With the lowly mods being run here do you really think you will gain a difference, hald a hp if that :scratch: Then you have the dte system, set up for the standard engine, gut your air box, buy a decat, add a 3" diamiter exuast, move the air feed from the wheel arch to the grill and you may gain 1hp, i bet you lose more.

All those that have the tuning brain that i dont on here dont seem to have any dyno proof, so it may feel like 240BHP at the wheels, but you may as well say it feel like 300 at the wheels for the good it will do, the dte cobo and a new exuast and air filter will get you little over 200 bhp if lucky, and thats fly wheel, so those with decats and 3" systems are throwing money away :flower:

Buy a petrol engine if you are really in need of power, will work out a lot cheaper :thumbright: :cheers2:

 

[Bluenavara]

so those with decats and 3" systems are throwing money away :flower:

But not as much as on that detailing brush made of blond-bleached pubic feathers of a young female virgin peacock....

 

[Done-it-all]

Armchair tuning specialist having his say here :lol:

You talk like most on here, know it all and done **** all. Before type with you fat fingers **** try putting to test. Then have a point to say. :thumbright:

 

[Andy]

heres my euro 4 down pipe after i decatted it.

 

[Warpa]

Armchair tuning specialist having his say here :lol:

You talk like most on here, know it all and done **** all. Before type with you fat fingers ***** try putting to test. Then have a point to say. :thumbright:

Check the pics above to see it will make no difference, enough said wink: Go waste your money, like i give a ***** :lol: