13b manifold flange
#2
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#3
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For that much, I'll buy a chunk of plate and go at it. Plus, the only steel one they offer is for the 20B.
I actually started doing this in preparation for making a side-draft manifold for a 12A. I made the major holes with a drill and saw, then bolted it to a mockup block (just a collection of junk housings held together with two tension bolts) and used a die grinder to open up the holes to the proper size and shape.
I got about 2/3rds of the way done before I stopped playing with 12As...
It depends on how much you value your time. For exhaust, I'd just buy one of their flanges. (Oh wait, I did do that...)
I actually started doing this in preparation for making a side-draft manifold for a 12A. I made the major holes with a drill and saw, then bolted it to a mockup block (just a collection of junk housings held together with two tension bolts) and used a die grinder to open up the holes to the proper size and shape.
I got about 2/3rds of the way done before I stopped playing with 12As...
It depends on how much you value your time. For exhaust, I'd just buy one of their flanges. (Oh wait, I did do that...)
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it's time consuming but i think you should stick making your own.that plate that mazdatrix is selling is a joke in two way's, the price $135 and the add itself...
"has NO ports cut into it - you make it into what you want"
#7
All I need to do is CAD it.
Downside is that you can't have angled ports in the flange, I'm not sure if you want those or not.
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#17
Uncontrollable drifter
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Hey, I copied the flange from my 13bre(Cosmo) flange which has larger ports and also from a 13REW metal gasket. So you should print them out first 1:1 to make sure they suit your needs. Those are the only 2 pieces I had to work with. Anyone who wants send me a private message with their email address as I don't check out this thread too often.
#21
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I have an aluminum 1/2" chunk that I had laser cut with 2 gaskets for sale if anybody wants it. I was going to use it as a spacer for my 2 piece Racing beat intake to lower my peak power range. This is an S4 style, which is what the 13b's use, but apparently the 12a uses the the GSL-SE style so all I did now was just take an old GSL-SE upper intake manifold and cut the flange on it to make it work. It's .455" as oppose to my .5" but I can survive with that.
I'll sell it for 90$ shipped OBO if anybody wants it. Here's the pics of it:
I'll sell it for 90$ shipped OBO if anybody wants it. Here's the pics of it:
#22
10000 RPM Lane
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Looking for the equivalent ACAD file on the 13BREW UIM-LIM gasket layout sizing?
I can obviously buy a gasket, but am mostly trying to determine the port diameter sizes in the REW UIM-LIM flange. A post on the forum stated that the two smaller REW primary runners are 30mm. The BRE layout above is showing 42mm for all four, but I’m unsure if the REW secondary runners are that same size?
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Last edited by TeamRX8; 01-23-22 at 11:30 AM.
#23
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just for future reference, the N3A1-13-112 gasket the Primary ports are 33.9mm and the Secondary ports are 41.9mm. so port size would be like 33 and 41?
i still find it a bit odd that Mazda used the big port engine in the low rpm automatic car and the smaller higher velocity runners in the sports car, you'd think it would have been the other way around, or at least i would
i still find it a bit odd that Mazda used the big port engine in the low rpm automatic car and the smaller higher velocity runners in the sports car, you'd think it would have been the other way around, or at least i would
#24
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stumbled across this comparison:
https://rotarycarclub.com/rotary_for...hread.php?t=14
not so sure it actually works out the way you suggested in the quoted text, but hoping to post something more on it soon.
.
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stumbled across this comparison:
https://rotarycarclub.com/rotary_for...hread.php?t=14
not so sure it actually works out the way you suggested in the quoted text, but hoping to post something more on it soon.
.
https://rotarycarclub.com/rotary_for...hread.php?t=14
not so sure it actually works out the way you suggested in the quoted text, but hoping to post something more on it soon.
.
there are differences, the Cosmo gets the primary injectors out of the port flow.