Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: SCOOMER on December 06, 2004, 12:05:34 AM

Title: External wastegate, atmos or not?
Post by: SCOOMER on December 06, 2004, 12:05:34 AM
Hi all,

At present im having a single turbo GT35/40 fitted and ive been asked by the tuner if i want the external wastegate fitted to atmosphere or plumbed into the exhaust.

So my Q is this, should i get it plumbed to atmoshere or not?

Is it really that loud??

Do you really get flames out of the wastegate?

Come on whos atmoshere and whos not?

Scott.
Title: External wastegate, atmos or not?
Post by: rx7veilside on December 06, 2004, 06:28:17 AM
i have an external wastegate with gt35/40 and i am now running feed silenced mid pipe and apexi rear and it is still fairly loud i wld plumb it back in and u only get flames if a car is over fuelling if the apexi is tuned correctly u will not get flames
Title: External wastegate, atmos or not?
Post by: SCOOMER on December 06, 2004, 09:29:41 AM
Thanx veilside, going to have it plumbed back in to the exhaust.

Scott
Title: External wastegate, atmos or not?
Post by: Fish on December 06, 2004, 09:30:01 AM
Scott, you will want this fed back into the exhaust system. Otherwise you will be deaf and minus anywhere to live....

Yes you will get good flames from the wastegate. I remember Brian Ellis setting light to the floor of CPL. :D

Fish
Title: External wastegate, atmos or not?
Post by: 20B_boy on December 06, 2004, 09:33:58 AM
I think the noise is horrid, u cant hear the engine properly over it which I personally hate.

It gets really annoying after a while IMO. Each to their own tho...
Title: External wastegate, atmos or not?
Post by: DRAGON on December 06, 2004, 10:03:34 AM
Personally i love it, sounds very evil. I have an RE Back box on the camo, which is fairly quiet, but then when you come on boost it sounds like an F1 car.
Track days would be out though, unless the have no sound limits.
Title: External wastegate, atmos or not?
Post by: asp on December 07, 2004, 05:49:25 PM
u can allways have it plumed back in if u dont like it. aint herd mine yet.but if its 2 bad its not a big job 2 get it plumed in2 the zorst

asp
Title: External wastegate, atmos or not?
Post by: Ed_RX7 on December 07, 2004, 06:43:13 PM
you gotta get that thing plumbed into the zorst!!!!!.....you\'ll get sick of it otherwise!!!:(
Title: External wastegate, atmos or not?
Post by: Erdin on December 07, 2004, 07:19:38 PM
you loos a bit of power when it is plumed in keep it external, beside it will onley open when you hit full boost.

chees

Erdin
Title: External wastegate, atmos or not?
Post by: SCOOMER on December 07, 2004, 07:22:40 PM
Could you explain why you would lose power plumbing it back into the exhaust.

Scott
Title: External wastegate, atmos or not?
Post by: Erdin on December 07, 2004, 07:46:27 PM
I think it to do with back pressure.

cheers