1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

6port to 12a intake adaptor

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Old Feb 16, 2017 | 10:33 AM
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6port to 12a intake adaptor

Hey guys, I've seen a few posts about making an adapter to go from a 6port s4 keg to a 12a style intake with a carb, in my case saintake/nikki. How thick are these spacers? 1"? Does anyone just sell them so I don't have to make one? I'd rather spend the money than the time, just missed one that was for sale in the classifieds.
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Old Feb 16, 2017 | 01:44 PM
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https://www.mazdatrix.com/r-intakefab.htm
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Old Feb 17, 2017 | 06:39 PM
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Originally Posted by cshaw07
Hey guys, I've seen a few posts about making an adapter to go from a 6port s4 keg to a 12a style intake with a carb, in my case saintake/nikki. How thick are these spacers? 1"? Does anyone just sell them so I don't have to make one? I'd rather spend the money than the time, just missed one that was for sale in the classifieds.

i have one. i will dig it up tomorrow. also there is a local shop also that made an adapter plate for me to install an old school 13b manifold to 13b tii. the first plate was $150 coz they made a template. after that its $75 including the 1" thick aluminum plate
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Old Feb 17, 2017 | 08:27 PM
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Originally Posted by Jeff20B
is 1/2" thick enough to be able to bolt a 12a intake to it and still be able to bold it to the engine, as well as have enough thickness to step the transition from 12a intake to 6port engine ports as best as possible? if so, that would save me a lot of time. thanks!
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Old Feb 17, 2017 | 08:30 PM
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Originally Posted by Siraniko
i have one. i will dig it up tomorrow. also there is a local shop also that made an adapter plate for me to install an old school 13b manifold to 13b tii. the first plate was $150 coz they made a template. after that its $75 including the 1" thick aluminum plate
do you want to sell it? send me a pm if you do. thanks!
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Old Feb 17, 2017 | 08:33 PM
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Originally Posted by cshaw07
is 1/2" thick enough to be able to bolt a 12a intake to it and still be able to bold it to the engine, as well as have enough thickness to step the transition from 12a intake to 6port engine ports as best as possible? if so, that would save me a lot of time. thanks!
I did it in a 1/4" thick plate. No more narrow than the stock Nikki manifold.
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Old Feb 17, 2017 | 08:36 PM
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good to know, i'll order that plate from mazdatrix. what is the recommended thing to do with the port sleeves? remove them or fuse them open with some rtv or something?
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Old Feb 18, 2017 | 12:55 PM
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i was mistaken 3/4 thick for tii plate. the 6port plate is 1.5 thick but it was made 20 years ago 2 holes need to be tetapped. Pm me if youre interested

Last edited by Siraniko; Feb 18, 2017 at 12:57 PM.
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