dual wastegates??

[4g63turbo84]

When do you need to run dual wastegates?

My set up will put me around 500hp...

 

[staztrx250]

You only need two if you have a true divided manifold. Otherwise one tial44 is fine

 

[myfirstgsx]

dual wastgates would be recomended if the backbreasure cannot be relieved enough with one wastgate to hold the desired boost .

 

[Archer Fabrications]

dual wastgates would be recomended if the backbreasure cannot be relieved enough with one wastgate to hold the desired boost .

Or you just get a bigger single gate.
Ive never seen dual gates on a single scroll setup.

 

[viperlp01]

My tial 60mm wastegate is bigger than 2x38mm wastegates. If you run high boost then you don't need much of a wastegate.

 

[Archer Fabrications]

Lol isn't 38+38 76mm...
So technically wouldn't two gates... You get the idea.

 

[ktime]

i really never understood them just thought they were on high compression engines

 

[agentorange313]

Lol isn't 38+38 76mm...
So technically wouldn't two gates... You get the idea.

....thats not how you calculate how much surface area the valve has, or area of a circle that is.

38mm or 60mm would be the diameter, AREA (A) for a circle is Pi x R2 (2 represents squared)
60mm - A = 11,304mm squared
38mm - A = 1,134mm squared

2x 38mm wastgates = 2268 mm
1x 60mm wsategate = 11304 mm

 

[Archer Fabrications]

i really never understood them just thought they were on high compression engines

They are on all turbos, some internal, some external. The little silver or gold thing that sits by the compressor is the same thing as the silver or colored tial units. Every turbo needs a waste gate or it will never stop making pressure and will most likely over spin and kill it.

 

[Archer Fabrications]

....thats not how you calculate how much surface area the valve has, or area of a circle that is.

38mm or 60mm would be the diameter, AREA (A) for a circle is Pi x R2 (2 represents squared)
60mm - A = 11,304mm squared
38mm - A = 1,134mm squared

2x 38mm wastgates = 2268 mm sqaure
1x 60mm wsategate = 11304 mm

Okay math wiz, you win

 

[ktime]

They are on all turbos, some internal, some external. The little silver or gold thing that sits by the compressor is the same thing as the silver or colored tial units. Every turbo needs a waste gate or it will never stop making pressure and will most likely over spin and kill it.

no i was talking about running dual wastegates

 

[pauleyman]

He still wins but it's radius not diameter on that 60mm. = 30*30*3.14= 2826

 

[Archer Fabrications]

no i was talking about running dual wastegates

Devided manifolds need dual waste gates it's pretty simple a wastegate per 2 runners. Usually 1&4 and 2&3

 

[ktime]

Devided manifolds need dual waste gates it's pretty simple a wastegate per 2 runners. Usually 1&4 and 2&3

got it now i was thinking way too much

 

[crash89]

Divided manifolds dont NEED two wastegates.. There are numerous styles of true divided manifolds that only use one gate.For example, DNP makes them this way.. Or Mr Peepers t/s custom wg.

EXTREME PSI : Your #1 Source for In Stock Performance Parts

 

[duckie1098]

Divided manifolds dont NEED two wastegates.. There are numerous styles of true divided manifolds that only use one gate.For example, DNP makes them this way.. Or Mr Peepers t/s custom wg.

EXTREME PSI : Your #1 Source for In Stock Performance Parts

Is there any negative sides to running a twin scroll manifold and using one wastegate (like the manifold you linked)?

 

[Sirnixalot]

you need to keep the 2 sides separated up to the face of the wastegate valve if you are using a single wastegate on a twin scroll setup

 

[LandSpeed-DSM]

you need to keep the 2 sides separated up to the face of the wastegate valve if you are using a single wastegate on a twin scroll setup

Is there any negative sides to running a twin scroll manifold and using one wastegate (like the manifold you linked)?

See above, it adds a whole layer of complexity to fabbing the manifold.. and if you are not intending on running a lot of boost, you will need a very large gate.

The more boost you run, the less valve area you need on the wastegate.

Just something to keep in mind. For example, I'm only using two 38mm gatess in stead of 44s because I will not need to bypass a lot of exhaust around the turbine.