NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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Old 10-04-2002, 02:06 PM
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What, if any, would be the advantage of a 20B over a 13B?? Or vice versa??

please include cost, maintenance, parts, service, customization, performance, etc.

thanks
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Old 10-04-2002, 03:40 PM
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pro's:

low end power

you can have 300+hp with out opening the motor



cons:

its not cheap

expect about 11-16mpg



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Old 10-09-2002, 03:40 PM
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Whats up. Im new here, this is my first post in fact. I as just wondering how much a 20b motor will cost and if it bolts up to the stock RX7 tranny. Thanks.
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Old 10-09-2002, 03:49 PM
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about $3500 and it will bolt up although you need a flywheel for it since all 20B's are automatic....
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Old 10-10-2002, 12:20 AM
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Can you use the 13B flywheel??? Also can you guys help me out, I'm new to this rotary thing and I wanna build my own motor. I was wondering if there are any books or anything out there I can look at. I know regular engines and could build them all day but I never did a rotary so I need to learn. Thanks guys.
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Old 10-10-2002, 11:04 AM
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the stock mazda flywheels have a balance wieght cast into them, the automatics have a counter wieght, that bolts to a seperate balance wieght.

all the after market flywheels bolt up like the flexplate, and mazda never made a 20b flywheel



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Old 10-10-2002, 01:24 PM
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wow, 300hp w/o even pushing it yet. i want one of those
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Old 10-10-2002, 01:48 PM
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Originally Posted by Turbo II' date='Oct 10 2002, 10:24 AM
wow, 300hp w/o even pushing it yet. i want one of those
yah, thats why i did it. i can have vosko speed without having to pull the motor out of the car....



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Old 10-10-2002, 01:49 PM
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engine too heavy for a 510 huh? or how bout a rx3?
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Old 10-10-2002, 01:50 PM
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Originally Posted by Turbo II' date='Oct 10 2002, 10:49 AM
engine too heavy for a 510 huh? or how bout a rx3?
my turbo 2 wieghs 10lbs more than stock, and the only thing i did was ditch the ac and ps



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