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Old 04-27-2020, 08:47 PM   #1
WTF99
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Default Help twin scroll exhaust manifold with one wastegate

Hi all,

I have a twin scroll exhaust manifold without line to the wategate but I need modify it because I make a external wastegate but I want make only one external wastegate.

I'm not welder if you can me show a maximum of detailed pics that I can show it at the welder is really appreciated.

And how make the good choice for the wastegate and how much boost or power can accepted the stock pistons from s b230fk from 97 ?

My exhaust manifold come from "Sweden Exhaust"

1588034537-20200408-111523.jpg - envoi d'image avec NoelShack
1588034988-20200409-202724.jpg - envoi d'image avec NoelShack
1588035019-20200409-195130.jpg - envoi d'image avec NoelShack
1588035054-20200409-201315.jpg - envoi d'image avec NoelShack
1588035112-20200409-202111.jpg - envoi d'image avec NoelShack



Thanks a lot for your help
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Last edited by WTF99; 04-27-2020 at 08:56 PM..
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Old 04-28-2020, 12:38 AM   #2
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For the choice of wastegate is ok I have find

http://turbolabofamerica.com/what-si...e-size-to-use/
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Old 04-28-2020, 10:46 PM   #3
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What turbo are you using?
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Old 05-01-2020, 01:24 AM   #4
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What turbo are you using?
A little
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Old 05-01-2020, 04:20 AM   #5
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In the thread where he wanted to drill a hole between the scrolls I think he said HX35.

Hopefully you will ask your welder to keep the two halves of the manifold separate until your single wastegate like this https://images.app.goo.gl/5kCuoQiccUpUYzco7
https://images.app.goo.gl/pszcpXg7SJtiEbHL9

What wastegate do you have?
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Old 05-01-2020, 10:25 AM   #6
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the header I have from RSI is a true divided twin scroll but with a single gate. Sorry I am not finding a picture looking down the throat of the flange. Basically the wastegate outlet bridges the two scrolls right at the collector. Not the most ideal configuration I know but my car is still faster than most people's so neener neener I don't care.



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Old 05-01-2020, 01:40 PM   #7
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the header I have from RSI is a true divided twin scroll but with a single gate. Sorry I am not finding a picture looking down the throat of the flange. Basically the wastegate outlet bridges the two scrolls right at the collector. Not the most ideal configuration I know but my car is still faster than most people's so neener neener I don't care.
No boost creep with this, even at low boost?
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Old 05-01-2020, 01:49 PM   #8
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No boost creep with this, even at low boost?
not a lick. I've never had less wastegate spring in it than ~13psi but it'll hold it all the way out no problem. True for the HX35 and the 7670. Tial 38mm MVS.

I've thought a lot about a new dual gate manifold with a t4 flange on it, and Tate and I have discussed some plans around it, but I'm not sure the juice is worth the squeeze considering I already HAVE this.
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Old 05-01-2020, 02:10 PM   #9
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not a lick. I've never had less wastegate spring in it than ~13psi but it'll hold it all the way out no problem. True for the HX35 and the 7670. Tial 38mm MVS.

I've thought a lot about a new dual gate manifold with a t4 flange on it, and Tate and I have discussed some plans around it, but I'm not sure the juice is worth the squeeze considering I already HAVE this.
Damn. That makes me wish I'd stuck with one wastegate on mine.
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Old 05-01-2020, 02:41 PM   #10
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Damn. That makes me wish I'd stuck with one wastegate on mine.
in for a penny in for a pound!
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Old 05-01-2020, 03:11 PM   #11
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Quote:
Originally Posted by Sparkles View Post
In the thread where he wanted to drill a hole between the scrolls I think he said HX35.

Hopefully you will ask your welder to keep the two halves of the manifold separate until your single wastegate like this https://images.app.goo.gl/5kCuoQiccUpUYzco7
https://images.app.goo.gl/pszcpXg7SJtiEbHL9

What wastegate do you have?

Why this is best that direct the 2 in one ?

Maybe I go of a Gen V hyper Gate 45 from turbosmart
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Old 05-02-2020, 03:35 PM   #12
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Weld it into the exhaust housing
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Old 05-08-2020, 12:09 PM   #13
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Weld it into the exhaust housing
This is exactly what I was thinking after reading first post. Seems to be a popular option for this situation.
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Old 05-13-2020, 12:47 AM   #14
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Quote:
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Damn. That makes me wish I'd stuck with one wastegate on mine.
No no no. You need as many TiAL wastegates as you can fit in there.


An MVS is more than sufficient for most redblocks. Ideally, if using one wastegate and a divided manifold, you should separate the wastegate runner all the way to the valve. But I'm in the same boat as Mike. Mine is a single runner starting at the collector and works fine.
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Old 05-13-2020, 02:20 AM   #15
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Just because something works doesn't mean it couldn't have been better...
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Old 05-13-2020, 04:40 AM   #16
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Originally Posted by t8fanning View Post
No no no. You need as many TiAL wastegates as you can fit in there.


An MVS is more than sufficient for most redblocks. Ideally, if using one wastegate and a divided manifold, you should separate the wastegate runner all the way to the valve. But I'm in the same boat as Mike. Mine is a single runner starting at the collector and works fine.
Don't worry, my second brand new MV-s got here last week. After boost creep killed my B23, I'm not taking any chances. Although I do plan to block off on of the wastegates sometime to see if it still works. Just because I'm a glutton for punishment.
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Old 05-13-2020, 08:27 AM   #17
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No no no. You need as many TiAL wastegates as you can fit in there.
Can we use code TATE for 20% off at checkout?

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Just because something works doesn't mean it couldn't have been better...
IS NOTHING I DO GOOD ENOUGH FOR YOU?! I HATE YOU DAD!
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Old 05-13-2020, 09:17 AM   #18
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If you bought the header new from swedenexhaust, how come you didn't add wastegate option? Seems like this would have been the better idea.
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Old 05-13-2020, 11:19 AM   #19
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Just because something works doesn't mean it couldn't have been better...
Shhhhhhh ;)
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Old 05-14-2020, 10:36 AM   #20
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Weld it into the exhaust housing
Ding Ding Ding we have a winner!
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Old 05-15-2020, 08:48 PM   #21
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Don't worry, my second brand new MV-s got here last week. After boost creep killed my B23, I'm not taking any chances. Although I do plan to block off on of the wastegates sometime to see if it still works. Just because I'm a glutton for punishment.
Tyler is single handedly saving us in these tough times.

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Can we use code TATE for 20% off at checkout?
I wish. But that's above my pay grade.
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