Mazda Rotary Club

General => General Technical => Topic started by: D3S on October 14, 2005, 05:38:43 PM

Title: DP and Decat what to go for?
Post by: D3S on October 14, 2005, 05:38:43 PM
Ok i am looking for a new downpipe and Decat, any recomendations?

I Am looking at Pettit racing baffled decat, even though i really want non baffled i think it will be to loud lol.

What else can i look at?

Cheers

Gav
Title: DP and Decat what to go for?
Post by: tr1cky on October 14, 2005, 05:45:51 PM
For downpipe I would recomend the HKS one, very good quality at a senseable price.  :yes

Had mine fitted recently- impressed with how much power it helps free up! (with de-cat, exhaust, ind kit and Power FC) Went from 229rwhp to 322.9 :eek:  :evillaugh  :eek:  

As for midpipe/de-cat, I went for Dragon straight through- good but LOUD!!
Get a silenced midpipe if your concerned about noise levels, only downside is they cost more :rolleyes:

HTH Rich
Title: DP and Decat what to go for?
Post by: monkey-fd3s on October 14, 2005, 05:52:41 PM
Hmmm.

Well when i had my twins I ran a HKS downpipe which I was more than happy with, that joined to a RE:Worx unsilenced mid-pipe.  

It was loud and i\'d say my car now sounds much nicer with the silenced mid-section :)

Hope that helps
Title: DP and Decat what to go for?
Post by: ro284 on October 14, 2005, 06:36:31 PM
Yes thanks mate that does help, i want to de-cat but don\'t want to upset the neighbours, what make silenced pipe did you use please? and what tail pipe/main silencer is that with?
cheers Bob
Title: DP and Decat what to go for?
Post by: D3S on October 15, 2005, 07:55:28 PM
I heard that the HKS item was not stainless steel? and infact mild which puts me off a tad. I think i will go for a silenced mid pipe as long as it dont strangle to much power, i want to get all this done along with my new IC and rad, should prove fun when its mapped

Gav
Title: DP and Decat what to go for?
Post by: tr1cky on October 15, 2005, 10:05:35 PM
Silenced midpipe will not affect power, just makes less noise ;)
Title: DP and Decat what to go for?
Post by: monkey-fd3s on October 17, 2005, 10:49:23 AM
Hey,

Quite correct about the HKS downpipe, it\'s actually cast at the top end where it meets the twins.  This is actually quite good because mild steel behaves better under very high temperatures than stainless.  You won\'t find a power gain from using a s/s downpipe but it\'ll look better when you run people over  :p

First thing to note: US downpipes won\'t fit - because they don\'t have the steering rack to worry about they are shaped more "conventionally"

I would seriously reccomend the HKS DP.  There are some fancier ones about but they tend to cost more $$$ and don\'t offer much.

For the mid pipe i think all the uk players make their own - dragon, reworx, etc.  Go with one of those you\'ll find that they are good value and performance.
Title: DP and Decat what to go for?
Post by: D3S on October 17, 2005, 01:37:47 PM
Yeah to be honest who sees the DP and Decat lol, what i do want to know is how the DP will work with a single turbo? as eventually i will go for a single, would i require a different DP again?

Cheers

Gavin
Title: DP and Decat what to go for?
Post by: tr1cky on October 17, 2005, 02:58:54 PM
Yeah, changing the turbo will require a different DP.

Most single turbo kits come with a suitable downpipe.

HTH

Quote from: D3SYeah to be honest who sees the DP and Decat lol, what i do want to know is how the DP will work with a single turbo? as eventually i will go for a single, would i require a different DP again?

Cheers

Gavin
Title: DP and Decat what to go for?
Post by: D3S on October 17, 2005, 08:13:18 PM
Well HKS DP are pretty cheap so it wouldnt break the bank to buy one and then sell it on a later date when i go single..

Gav
Title: DP and Decat what to go for?
Post by: Ricco_04 on October 17, 2005, 10:40:39 PM
I asked the very same question about the DP - the other reason is that they wont rust (assuming is used a lot) because they always go super hot when you use the car!
Title: DP and Decat what to go for?
Post by: D3S on October 19, 2005, 08:56:53 AM
As long as it dont crack then it does not matter, besides i am going to lag the thing anyway lol.

Gav