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Re: The MR2 Australia SW20
2018/08/08 17:28:35
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It's a Doc Race manifold. The waste gate inlet is as close to the turbo as possible - i.e. as far into the open collector as possible.
The ideal design for this manifold would be 2 x 38mm waste gates on either side of the collector, and at an angle that promotes maximum flow into the waste gates.
I am going to fit a single 50mm waste gate on one side with a very good flow angle into the waste gate inlet. That should do the trick without totally remaking the manifold.
It's mainly the bad angle with the existing design that is causing the problem.
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robk
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Re: The MR2 Australia SW20
2018/08/09 00:14:30
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I've had no trouble controlling boost anywhere between about 17 and 30 psi with a 44mm wastegate and the exhaust manifold pictured in my avatar.
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track_mr2
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Re: The MR2 Australia SW20
2018/08/09 19:13:44
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I'm hanging to see if the bigger wastegate and angle change fixes the problem too because when you look at the pictures on page 42 of this thread it really looks like only one collector is connected to the wastegate and definitely like the flow from at least two of the cylinders can bypass the wastegate. Will be interesting to see what happens after the weekend.
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Re: The MR2 Australia SW20
2018/08/09 19:51:17
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B24
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Re: The MR2 Australia SW20
2018/08/09 20:50:15
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I think that looks ok as its catching two ports plus it will scavenge from the collector. It is also a proven manifold so I go back to saying as I did before, it may be the spring pressure but a 50mm will not do it any harm. If it becomes too much, sell it and fit a 2GR.. 
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Re: The MR2 Australia SW20
2018/08/14 18:57:56
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Maaaaaate as I have said before, I don't want to make the car slower. I want to go faster! 😎👍😁
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B24
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Re: The MR2 Australia SW20
2018/08/15 19:52:33
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Admin
Maaaaaate as I have said before, I don't want to make the car slower. I want to go faster! 😎👍😁
Lol. you are a funny guy!
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Re: The MR2 Australia SW20
2018/08/25 10:26:50
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Re: The MR2 Australia SW20
2018/08/25 19:39:31
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Lumix
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Re: The MR2 Australia SW20
2018/08/25 19:54:30
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Hopefully all goes well with the tune!
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Re: The MR2 Australia SW20
2018/08/26 13:29:56
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Re: The MR2 Australia SW20
2018/08/27 17:21:20
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The car spent the day at Croydon Racing Developments today, and they have found that they need to upgrade the fuel pump. I expected to find a limit in the fuel or ignition system, so this isn't news.
The boost is now controlled very well. The wastegate has a 14psi spring in it, and it sits happily at 14psi. #WIN
It's already making the same power as before at only 14psi and VERY conservative ignition advance levels. The cams haven't been dialled in yet either.
They will run it at higher boost levels once the new pump goes in.
I'm excited!
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B24
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Re: The MR2 Australia SW20
2018/08/30 19:27:46
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Thats great news. Hope to see some solid results soon. You will need them! haha!
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Admin
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Re: The MR2 Australia SW20
2018/08/30 19:57:55
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The fuel pump went in today. Tune tomorrow. I love trash talk before a MR2WPC. 😀
Bring it on!!!!
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B24
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Re: The MR2 Australia SW20
2018/08/30 20:47:35
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Admin
The fuel pump went in today. Tune tomorrow. I love trash talk before a MR2WPC. 😀
Bring it on!!!!
I know, it's a nice change to be part of it. I should have mine running again this weekend.
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