Help identify 13b (pics)
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Help identify 13b (pics)
Hi guys,
Im new to rotaries and still learning.
From what ive gathered i think i have a na 4 port rx4/5 cosmo engine or a bitsa?
It has large italic Mazda in a box frame, front and inter irons have letter 2 stamped and on rear side of rear iron has the letter N.
Is it standard port size?
Rotors baths are cast iron they have 3mm apex and 1mm side seal grooves so guessing they would be a early gen wouldnt they?
so the pics are linked any help is greatly appreciated, still learning so take it easy on me haha.
If any specific pics are needed let me know.
thanks, Joel
http://s1242.photobucket.com/albums/gg522/rotaryute86/
Im new to rotaries and still learning.
From what ive gathered i think i have a na 4 port rx4/5 cosmo engine or a bitsa?
It has large italic Mazda in a box frame, front and inter irons have letter 2 stamped and on rear side of rear iron has the letter N.
Is it standard port size?
Rotors baths are cast iron they have 3mm apex and 1mm side seal grooves so guessing they would be a early gen wouldnt they?
so the pics are linked any help is greatly appreciated, still learning so take it easy on me haha.
If any specific pics are needed let me know.
thanks, Joel
http://s1242.photobucket.com/albums/gg522/rotaryute86/
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#10
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The tall port iron gives you more room to port. Generally when people port the small port irons, they bring them out to tall port specs or just a little beyond. But you quickly run out of material.
That's a good point on the 12A end irons. The runners look 12Aish. 13B runners are taller.
That's a good point on the 12A end irons. The runners look 12Aish. 13B runners are taller.
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Compare picture of all of them.
12A irons have much smaller intake runners which are more roundish, as well as smaller ports.
13B irons from a Cosmo/Repu have taller intake runners and larger ports.
12A irons have much smaller intake runners which are more roundish, as well as smaller ports.
13B irons from a Cosmo/Repu have taller intake runners and larger ports.
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I'm finding it hard to compare the difference between the 12a irons and the Cosmo/repu can anyone give me some ideas on Wat I should be looking for like the difference in port sizes,runners what lettering is cast onto the each specific iron?
If anyone could post pictures of the plates (12a and cosmo,repu) and explain the differences that would be greatly appreciated
If anyone could post pictures of the plates (12a and cosmo,repu) and explain the differences that would be greatly appreciated
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