doghead

iTrader: (1)

So, I've been looking at this online, it looks similar to the ams wide mouth dp although no quite as well thought out, flowing, or astetic. However it can be found cheaper than the ams, which has peaked my interest. So, anyone one have one or done any testing with one? How does it stack up? It looks like the results would be close to the same gains by design, it looks like a poorly copied ams design. But still get cast and a bell mouth.

Here is what it looks like.

http://www.google.com/imgres?imgurl=...1t:429,r:5,s:0

Kracka

iTrader: (49)

It looks ok and would probably perform similarly...but unless there is a huge price difference might be worth it to just buy the real thing. Looks like it's on sale for $399 which isn't all that much cheaper than AMS' downpipe.

You can get MAP's for even cheaper yet too, I believe their retail price is $369. ETS has a nice one as well, but I think that one's closer to $500.

doghead

iTrader: (1)

This is the only other one that I've seen that is cast. I have found cheaper options that are piping like the Rexspeed for about $210. The cheapest that I've found the ams is $430 and the best deal I've found on the turboxs cast peice is about $330, so $100 less. Options, options. I was going to get the perrin dp/cat combo until I read about the 25whp gains from removing the stock o2 housing on larger turbos, too large of a choke point, needs to be replaced.

linjy2

iTrader: (4)

that looks like a copy of the ams one? wonder if it is...

LapDance

just buy the original ams piece. Its only like $30 more and is proven.

Kracka

iTrader: (49)

Partly, looks like they copied AMS' design at the turbo outlet bellmouth area, but then went to stainless piping before and after the flex rather than staying cast throughout.

doghead

iTrader: (1)

Yep. Just read a post on this on evoxforum. AMS responded to the post and said that it looks like they copied the bellmouth portion and then went into piping to save money. I agree that the ams peice is nicer through and through, but is it worth it for another $100. Maybe to some, others no, I am still undecided, I'm pretty sure that the ams peice although nicer in construction will not make any significant gains over this peice. $330 is a much more reasonable price for a dp and this beign the only other cast option, it may very well be what I end up getting. Maybe I will be the first on the forum, if I get it I will let you all know how it works out.

chu

iTrader: (72)

How much different can one really design a bellmouth to fit the stock turbo?

rmondoh

iTrader: (5)

If that is the case, why even design an o2/dp with a bellmouth or divorced design? Why not do what Cobb did and just make a larger diameter downpipe portion?

Kracka

iTrader: (49)

Do some before/after dyno testing too if possible.

Kracka

iTrader: (49)

^^

WWIXMR

TurboXS must've ran out of talent in the R&D department. Either that or they are learning the ways of the Chinese.

Crusher_13

What are the advantages of a Bellmouth when compared to the stock design?

Would a twin dump pipe design (divorced wastegate downpipe) be better than the bellmouth?

The exhaust on my former car a Mazda3 MPS (230wkw or 313whp and 332ft lbs) was a divorced wastegate and made a lot more power than other cars with TBE intake tmic and tune. Around 15kw or 20hp more.

Kracka

iTrader: (49)

1. Stock is a bellmouth design.

2. Depends who you ask, in my opinion yes divorced is better to help reduce turbulence by smoothly introducing the wastegaste gasses back into the exhaust gasses further downstream away from the turbo outlet.

Opinions will differ and people buy whichever they feel is better. AMS, TurboXS, and Megan choose to stick with the factory's bellmouth design while others such as MAP, ETS, and Ultimate Racing opted for the divorced wastegate design.