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Old 05-03-2011, 10:44 AM   #1
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Default Mazdaspeed HG vs Reroute?

I know I read somewhere that the ports in the Mazdaspeed MX5 HG force water through the head better than the 94-up 1.8 gaskets but for the life of me i cant find that thread. As good as reroute or not?

We are building a 97 motor for track use only.

Thanks
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Old 05-03-2011, 10:46 AM   #2
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It's the 2001+ HG rather than the MS HG IIRC.

From what I understand the 2001+ HG is better than earlier Miata OEM cooling systems, but not as good as a proper re-route.

You shouldn't run both either, it's one or the other.
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Old 05-03-2011, 11:40 AM   #3
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Quote:
Originally Posted by richyvrlimited View Post

You shouldn't run both either, it's one or the other.
Or you can run both and use two T-stats, one in the re-route and one in the stock location with a tee into the radiator.
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Old 05-03-2011, 11:47 AM   #4
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The optimal solution is to run the 99/00 head gasket with a reroute. There is a big long thread on m.net about it where we compare them all. Jasonscb also put some additional holes in his and says it is working fine.
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Old 05-03-2011, 11:53 AM   #5
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Quote:
Originally Posted by BarbyCar View Post
Or you can run both and use two T-stats, one in the re-route and one in the stock location with a tee into the radiator.
hyper? is that you?
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Old 05-03-2011, 02:27 PM   #6
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Go figure I put my reroute in before we "discovered" the revised 01+ HG. My solution will be to add a front t-stat/t-into the upper rad hose rather than removing the reroute. The dual t-stat setup isn't all that bad, but Hyper's way of going about it and over complicating it and using a nice big metal pipe over the exhaust manifold.
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Old 05-03-2011, 11:33 PM   #7
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does anyone have links to the pics on miata.net? i dont have a account there at the moment.
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Old 05-18-2011, 02:01 AM   #8
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http://forum.miata.net/vb/showpost.p...3&postcount=91

Jason states his car ran cooler, based on his comparison w/ and w/o the 4 new holes he added. I can't seem to figure out if he was running a reroute at the time. Does anyone know? I wonder if he recommend the risk of ruining a gasket again or if he has a new way of punch those holes.
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