identifying rotary diffrent engines
#1
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identifying rotary diffrent engines
im looking atcually for the best 12A- 13B ever built im thinking its the 1989-1990 because of the compression of the rotors, but the 1984-1985 4 ports are the best housing for modification, i need to know if this is true and if so can i mix parts like 89-90 rotors into 84-85 housing then if soo stock no ports should give me around 155-160hp, 5-10hp less than the 6 port.........need back up ans. asap
#2
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The frist two years of the fuel inject 13bs the oring groves are in the rotor houseings, after that they are in the end houseings. The E shaft and rotors you can do any thing you want. 2mm 3mm late E shaft or one out of a 75 to 78 13b can be swaped any way you want to. I know some peaple out there are going to say I dont know what I'm talking about, but then what's that undre the hood of my 76 RX4. 76 E shaft. 85 rotor houseing, becouse it has the oil injection nozzles, and then what ever year the 2mm rotors had the high compression. With two turbos and K fuel injection, lots of porting.
#3
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just going by pics i've seen, all rotarys after '85 have the O-ring grooves in the intermediate housings. these grooves were moved back to the rotor housing in the rx8 engine.
now the engine i built for my rx3 is from a '74 rx4. the intermediates had the streetport and were reused, rotor housings were replaced with used ones, simular year and already ported, rotors were also replaced with simular year, e-shaft is from early 2nd gen '86-'88, not really sure, as is the wp housing to keep the alternating theme, aluminum, steel, aluminum, steel. i chose to use that particular housing to alow me to keep the two bolt steel outlet neck.
now the engine i built for my rx3 is from a '74 rx4. the intermediates had the streetport and were reused, rotor housings were replaced with used ones, simular year and already ported, rotors were also replaced with simular year, e-shaft is from early 2nd gen '86-'88, not really sure, as is the wp housing to keep the alternating theme, aluminum, steel, aluminum, steel. i chose to use that particular housing to alow me to keep the two bolt steel outlet neck.
#4
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Toughest of all the turbo rotary engines is easily the 12A turbo from the HB Cosmo & SA RX-7 (series-3).
They will take 10 times more punishment than a 13B turbo & are good for over 200,000km if well looked after.
Series-4 (86-88) 13B turbo is ok
Series-5 (89-91) 13B turbo is much stronger
Series-6 (92-95) 13B twin-turbo is ok
Series-7 (96-98) 13B twin-turbo is better
Series-8 (99-02) 13B twin-turbo is much stronger
They will take 10 times more punishment than a 13B turbo & are good for over 200,000km if well looked after.
Series-4 (86-88) 13B turbo is ok
Series-5 (89-91) 13B turbo is much stronger
Series-6 (92-95) 13B twin-turbo is ok
Series-7 (96-98) 13B twin-turbo is better
Series-8 (99-02) 13B twin-turbo is much stronger
Last edited by DMRH; 04-13-04 at 04:19 AM.
#5
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well i looked up the compression of the 89-90 13B N/A the rotors are the lightest and the compression is 9.5 and the lightest of rotors. close to the 10 compression on the R26B but the housing on the 84-85 is the best for modification so im gonna go with a 84-85 housing with a 89-90 rotors for N/A power but i donno if it ill be good for turbo????
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KAL797
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08-11-15 03:47 PM
12a, 13b, 13bs, 9698, compresion, engine, engines, high, identifing, identifying, mazda, rotary, rotors, rotory, turbo