2G twin scroll help!!!

[TheFlashDSM]

im doing a full build as we speak on my car and im legit about to order my turbo, its a borgwarner s366 .91 a/r

question

twin scroll or open scroll?

i just picked up a brand new tial 44mm waste gate is this big enough to run for the open scroll and is it big enough to run in the middle for the twin scroll? please help, need answer tn!!!

also can i use a twin scroll manifold and connect the dual waste gate ports to use the single 44mm

 

[303_2G]

Nice, I am on the same 366 TS.

twin scroll or open scroll?

i just picked up a brand new tial 44mm waste gate is this big enough to run for the open scroll and is it big enough to run in the middle for the twin scroll? please help, need answer tn!!!

also can i use a twin scroll manifold and connect the dual waste gate ports to use the single 44mm

Yes twin scroll is the way to go if possible but to do a real TS setup you need to use 2 wastegates. Yes the 44mm is big enough to use T4 open and Yes you can connect both sides of a TS to one 44mm but then not a true Twin Scroll setup because your boost is being regulated on 2 sides by 1 gate.
I personally have a T4 DNP TS mani that uses only 1 gate and got it from a friend that has no problems with controlling boost or anything, and I'm case your wondering Yes you can run a open scroll turbo on a divided manifold and vice Versa but always defeates the purpose.
Here's mine:

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[TheFlashDSM]

Nice, I am on the same 366 TS.


Yes twin scroll is the way to go if possible but to do a real TS setup you need to use 2 wastegates. Yes the 44mm is big enough to use T4 open and Yes you can connect both sides of a TS to one 44mm but then not a true Twin Scroll setup because your boast is being regulated on 2 sides by 1 gate.
I personally have a T4 DNP TS mani that uses only 1 gate and got it from a friend that has no problems with controlling boost or anything, and I'm case your wondering Yes you can run a open scroll turbo on a divided manifold and vice Versa but always defeates the purpose.

legit the best answer i have ever gotten, thankyou so much, now what brand twin manifold should i get?

 

[303_2G]

legit the best answer i have ever gotten, thankyou so much, now what brand twin manifold should i get?

Be prepared to spend more on the manifold than the turbo then
JMF & Extreme make a top mount T4 and Full race makes a incredible bottom mount one. There's others but mostly from smaller performance shops custom made. Below is JMF's and Full-Race's.

 

[TheFlashDSM]

Be prepared to spend more on the manifold than the turbo then
JMF & Extreme make a top mount T4 and Full race makes a incredible bottom mount one. There's others but mostly from smaller performance shops custom made. Below is JMF's and Full-Race's.

do u think i could get that twin scroll top mount made for 1 44mm wastegate from jmf?

 

[bastarddsm]

The .91 housing is probably too small. You can run 1 gate too. It will still be twin scroll, you just need to make sure it's divided all the way up to the gate. I've used a single 38mm emusa gate on the various setups I've tried.

 

[ceedawg]

Be prepared to spend more on the manifold than the turbo then
JMF & Extreme make a top mount T4 and Full race makes a incredible bottom mount one. There's others but mostly from smaller performance shops custom made. Below is JMF's and Full-Race's.

Full race does not.make it for Dsms when I needed one. But JMF makes a nice topmount one that I wish I had purchased before I had ETS make the bottom mount one I now have. I actually spoke to John I think his name was and it was around 900.00 or 1k plus to.build. JMF does a superior job. So does full race but full race only does it for the evo.

 

[TheFlashDSM]

The .91 housing is probably too small. You can run 1 gate too. It will still be twin scroll, you just need to make sure it's divided all the way up to the gate. I've used a single 38mm emusa gate on the various setups I've tried.

so if the get a twin scroll manifold i can use my 44mm waste gate with it and it will support the 750+hp im looking to get?

 

[97gsxIA]

44mm are used for stability at low boost. 38mm used for stability at higher boost. Since you're aiming for 750+ I would urge you to reconsider your wastegate size choice, specifically if you're pushing over 25psi.

 

[Archer Fabrications]

Twinscroll for street car, open for drag car. I'm on twin scroll 6466 1.15 but i weekend warrior my car, wanted a little more responsiveness.

Ive heard conflicting information about this. But APPARENTLY, a divided manifold on an open housing makes the most power. I'm not really set on believing that or not believing it, but it's information to chew on.

Honestly manifold brand doesnt matter
If it's made with the proper welding process, and they warranty the manifold.

Brand shouldnt matter as long as you cosider a couple things as a consumer in no particular order.

1. Warranty
2. Proper welding procedures
3. Fully back purged
4.flanges flat
5. Made in north america (usa/canada)
6. Design/look/aesthetics

Obviously if you have a company/person you would like to support over another, thats a factor as well but not always

 

[TheFlashDSM]

44mm are used for stability at low boost. 38mm used for stability at higher boost. Since you're aiming for 750+ I would urge you to reconsider your wastegate size choice, specifically if you're pushing over 25psi.

i legit just bough it so im kinda stuck with it now

 

[Archer Fabrications]

I use two 44mm's at 38psi youll be fine.

A single 44 is fine too, but for a divided make sure it's divided all the way to the gate valve. Most people that use a single gate/divided system use a 60mm single with a divider fwiw. And by the way, the whole divided to single is a HUGE PITA to fabricate/weld correctly in my experience.

 

[Operate]

Nice, I am on the same 366 TS.


Yes twin scroll is the way to go if possible but to do a real TS setup you need to use 2 wastegates. Yes the 44mm is big enough to use T4 open and Yes you can connect both sides of a TS to one 44mm but then not a true Twin Scroll setup because your boost is being regulated on 2 sides by 1 gate.
I personally have a T4 DNP TS mani that uses only 1 gate and got it from a friend that has no problems with controlling boost or anything, and I'm case your wondering Yes you can run a open scroll turbo on a divided manifold and vice Versa but always defeates the purpose.
Here's mine:

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Can you take a picture of your engine oil dipstick setup? Did you just bend the OEM unit or is it an aftermarket setup?

 

[motomattx]

If your seriously asking this question, your not likely ready to run that big of a turbo, nor are you going to make 750+ hp from a 4g63 like you think you are, this is'nt an attack on you personally, but a question like this is not the type of thing that a person chasing 750 hp goals should be asking, most reputable manifold manufacturers wont even make a twin scroll manifold without it having two wastegates, I personally run a GT4202r divided and yes it has two v-band gates, one on each side, they wouldnt even make it any other way even if I wanted them to. Brand does matter on manifolds, as the materials used need to be good, the welds need tig welded and the manifold runners need to be equal length to promote proper scavenging and flow.

 

[Archer Fabrications]

If your seriously asking this question, your not likely ready to run that big of a turbo, nor are you going to make 750+ hp from a 4g63 like you think you are, this is'nt an attack on you personally, but a question like this is not the type of thing that a person chasing 750 hp goals should be asking, most reputable manifold manufacturers wont even make a twin scroll manifold without it having two wastegates, I personally run a GT4202r divided and yes it has two v-band gates, one on each side, they wouldnt even make it any other way even if I wanted them to. Brand does matter on manifolds, as the materials used need to be good, the welds need tig welded and the manifold runners need to be equal length to promote proper scavenging and flow.

And there are people that are NOT apart of the big brands can do it right too. Sometimes its better to support the little guy. like i said earlier, long as process is correct, and warranty, shouldnt matter who makes it as long as they know what they are doing. Just no china crap. I make manifolds for a living for a well known shop, If i were to break off to do my own business... Does that mean my own brand is inferior to the big guys? No. For insrance, toxic fab is a one man show, and so is shearer and they hbe great reputations. You dont HAVE to go to just full race or ETS or jmf to get a good quality product is all I'm saying. But if thats what you want to do, then my all means.

I'll just throw this out for informational sake, when you say materials need to be GOOD, what exactally kind of material do you think is needed , titanium? Inconel? 321? 316? 304? Most shops use 304 unless otherwise asked to, some won't use anything but 304, (which is the cheapest most commonly used stainless steel) manifold fab isnt voodoo it just takes knowelege of the proper procedures, care, and an eye for detail.

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[TheFlashDSM]

And there are people that are NOT apart of the big brands can do it right too. Sometimes its better to support the little guy. like i said earlier, long as process is correct, and warranty, shouldnt matter who makes it as long as they know what they are doing. Just no china crap. I make manifolds for a living for a well known shop, If i were to break off to do my own business... Does that mean my own brand is inferior to the big guys? No. For insrance, toxic fab is a one man show, and so is shearer and they hbe great reputations. You dont HAVE to go to just full race or ETS or jmf to get a good quality product is all I'm saying. But if thats what you want to do, then my all means.

I'll just throw this out for informational sake, when you say materials need to be GOOD, what exactally kind of material do you think is needed , titanium? Inconel? 321? 316? 304? Most shops use 304 unless otherwise asked to, some won't use anything but 304, (which is the cheapest most commonly used stainless steel) manifold fab isnt voodoo it just takes knowelege of the proper procedures, care, and an eye for detail.

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welll then you need to take a trip to me so we can build one

 

[ViciousLord]

I called dibs a while. Lol

 

[Austin Jedrzejek]

Look into sheepy built I just ordered a manifold from them and the guy seemed very knowledgeable and had great customer service!

 

[bastarddsm]

304 really doesn't have the high temperature stability needed for a turbo header. It's still susptible to high temp creep and thermal fatigue. 321 is a better choice, and for us road race warriors and such it should really be Inconel.

You can get away with 304 or mild steel even by increasing the wall thickness.

You also need to pay attention to the runner size. 1.5" sched 10/40 is way to big unless your looking for some 10K+rpm monster. Also if your looking for spool, shorter runners are better.