what is this
07-16-2008, 09:50 AM
#1
Senior Member
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Join Date: Jun 2003
Location: Cedar Rapids, Iowa
Posts: 114
[attachment=44703:IMAG0002.JPG]
when I first picked up this engine I pegged it as a stock s1 12a. however when I got all the manifolds off and saw the long primaries with the air pump port it threw me off, specially when I went to mazdatrix to try and match it to an intake gasket. so what is it? is this an untouched engine, or one that someone opened up the primaries on an s3 engine? its not a huge deal as I have an extra s3 center iron, just wondering exactly what this is, as I had never seen it before. also if anyone has suggestions on what to do with it I appreciate any comments (I.E. use this center with s3 intake, replace it with the s3 iron ect....). I may be getting an RB side draft intake, so if that has any sway as to what I should do those suggestions help as well
thanks in advance!
when I first picked up this engine I pegged it as a stock s1 12a. however when I got all the manifolds off and saw the long primaries with the air pump port it threw me off, specially when I went to mazdatrix to try and match it to an intake gasket. so what is it? is this an untouched engine, or one that someone opened up the primaries on an s3 engine? its not a huge deal as I have an extra s3 center iron, just wondering exactly what this is, as I had never seen it before. also if anyone has suggestions on what to do with it I appreciate any comments (I.E. use this center with s3 intake, replace it with the s3 iron ect....). I may be getting an RB side draft intake, so if that has any sway as to what I should do those suggestions help as well
07-16-2008, 10:47 AM
#4
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Join Date: Jan 2006
Posts: 180
Originally Posted by rexguy' post='904872' date='Jul 16 2008, 08:31 AM
no, those are coolant passages for the stock intake
cheers
07-16-2008, 11:28 AM
#6
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Join Date: Jun 2003
Location: Cedar Rapids, Iowa
Posts: 114
Originally Posted by zeroecco' post='904878' date='Jul 16 2008, 10:47 AM
Unless it has 2 dizzys the motor belongs to the 78-80 series 1 rx-7 (I say 78 because the car was distributed on may 78 as the 79 model) I had the same motor in mine before I replaced it
cheers
cheers
nope, one dizzy.
more pics would be good, but it looks like 79-80 rotor housings and 81-85 irons?
thats what I am thinking too, but why open up the primary ports like that, when it had the small primary intake on it to match the air pump port? any real advantage to it? and do y'all think the RB intake will take advantage of those bigger primaries or should I just put a stock center iron in?
I'll try to have more pics by tonight, I had just snapped these quick to get some answers
07-16-2008, 10:57 PM
#8
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Join Date: Jun 2003
Location: Cedar Rapids, Iowa
Posts: 114
really? then maybe I don't have an '85 center. the center I have came off of the engine that was in my '85 and it matches the 81-85 gasket at mazdatrix
[attachment=44707:8185.jpg]
verses the 76-80 gasket, which more accurately matches the ports on the engine in question, minus the air pump port of course
[attachment=44708:7680.jpg]
so, will the stock '85 intake (which matches the 81-85 gasket) take any advantage of using the center with longer ports or not? I know its kinda a dumb question, but I'd hate to build it one way only to tear it apart again to make a better combo later (specially since I AM going to be getting the side draft fairly soon)
[attachment=44707:8185.jpg]
verses the 76-80 gasket, which more accurately matches the ports on the engine in question, minus the air pump port of course
[attachment=44708:7680.jpg]
so, will the stock '85 intake (which matches the 81-85 gasket) take any advantage of using the center with longer ports or not? I know its kinda a dumb question, but I'd hate to build it one way only to tear it apart again to make a better combo later (specially since I AM going to be getting the side draft fairly soon)