Alot of late nights work on the car

[Bazda]

bloody wayne, wheres my surge tank!!

[Crucible]

8O The Angry Old Mans is BACK IN TEH HIZZZYYYYY!!!!!

yeah havent seen him on here for a while, back for some ass kicking lol,

[strx7]

here's where i'm coming from

A Series 4 RX7 turbo, was always called a twin scroll turbo, it has one larger and 1 smaller entry into the exhuast housing, this gives it two different A/R's. Twin entry/Divided entry ehxuast housings have been around for years, but i have NEVER heard them called twin scroll. My understanding on this was because both Entry's have the EXACT same A/R. I just did a bit of hunting around the net, and it would seem mainly, mitsi and subaru started this "twin scroll = twin entry" thing. A series 5 rx7 turbo, has a divided exhuast housing, but mazda never called it a twin scroll turbo, they only refered to the series 4 as having that. Guys with RX7's have been using divided housing on their turbo's for year. and have never called them twin scroll either, probably because of the series 4 vs series 5 turbo naming by mazda as mentioned above.

perhaps no one else ever used the Series 4 rx7 type 'twin scroll' so the 'twin scroll' term has just become commonly used for a divided exhuast housing........

[Bazda]

here's where i'm coming from

A Series 4 RX7 turbo, was always called a twin scroll turbo, it has one larger and 1 smaller entry into the exhuast housing, this gives it two different A/R's. Twin entry/Divided entry ehxuast housings have been around for years, but i have NEVER heard them called twin scroll. My understanding on this was because both Entry's have the EXACT same A/R. I just did a bit of hunting around the net, and it would seem mainly, mitsi and subaru started this "twin scroll = twin entry" thing. A series 5 rx7 turbo, has a divided exhuast housing, but mazda never called it a twin scroll turbo, they only refered to the series 4 as having that. Guys with RX7's have been using divided housing on their turbo's for year. and have never called them twin scroll either, probably because of the series 4 vs series 5 turbo naming by mazda as mentioned above.

perhaps no one else ever used the Series 4 rx7 type 'twin scroll' so the 'twin scroll' term has just become commonly used for a divided exhuast housing........

but we arent talking about the way the mazda ones are designed, we are talking about 99gtt hooking up his turbo wrong and could get alot better perforamce by doing it right.
twin entry twin scroll just terms that u can easily mix up. As Vvega wrote from the garrets website is all that u need for 99gtt's setup.

[99gtt]

but we arent talking about the way the mazda ones are designed, we are talking about 99gtt hooking up his turbo wrong and could get alot better perforamce by doing it right.
twin entry twin scroll just terms that u can easily mix up. As Vvega wrote from the garrets website is all that u need for 99gtt's setup.

The way i have it set up is not wrong, just more lag and as i have stated i dont care about lag . Because during the week my wife drives the car and she doesnt come home and say ,gee that turbo, is laggy. I want it for the soul purpose when i take to the strip or track that it only ever sees high revs.

[Bazda]

so u dont care that you loose alot of hosepower down low...
the horsepower down low will bring u to ur horse power up high alot faster making the car more drivable and alot faster over all by a fair bit.
When my pulses mixed through the wastegate tounge the car felt way slower down low and up high.

If u had the right manifolds for the turbo you will realise the difference as I have experienced.

But i dont get why u went through all the trouble in making those manifolds but making them wrong...

[sergei]

Question: if external is used on twin entry turbo, the wastegate should feed from 2 divided ports, through an Y joint, will this affect much on twin entry design performance?
or the only best way to use 2 externals? what about balancing them?

[Bazda]

Question: if external is used on twin entry turbo, the wastegate should feed from 2 divided ports, through an Y joint, will this affect much on twin entry design performance?
or the only best way to use 2 externals? what about balancing them?

yes that is correct, thats why when u take the 2 pipes and where u join them together you use a splitter tounge plate that has the shape of ur external valve and presses up against it when the external is closed.
This design has been around since the 80s now but im quite surprised of the number of people who dotn know about it

I got sick of the splitter tounge cos they seem to burn out unless u make them real thick then u need a bigger gate in theory.






well to balance them, you just hook up everything like u normally do to put a Y section in the vacuum lines and make sure your externals have the same springs rates. It prob will never be 100% perfect but I doubt it would make a difference. and seems to work well on my car.

[99gtt]

[Emperor]

woop woop woop woop

its got an rb26dett?

[Alex B]

woop woop woop woop

its got an rb26dett?