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Old 07-16-2003, 02:03 PM   #1
STEALTH-WRX
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Default Can someone school me on the Mazda 13B Turbo Motor?

I would like to start a project in September using a 13B Motor. The motor needs to be a turbo model and fuel injected, so that narrows the information down for me. The motor will be placed in another car so i am only concerned about the motor itself. Can someone answer the following questions for me:

Which models or serial numbers are the best ones to use?

What are the differences in the motors?

What are the capabilities of each of the motors?

How can you build them for about 350-400 Wheel hp?

What are the major problems with them and why do they fail?

How much does the motor weigh?

Thanks.
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Old 07-16-2003, 02:08 PM   #2
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you'd be much better off asking that here
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Old 07-16-2003, 02:13 PM   #3
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well if i ask there i will have to register, then deal with everyone calling me a noob and so forth. i figure i can get the fastest answers here. someone will know. ill sit it out and wait.
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Old 07-16-2003, 02:16 PM   #4
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Correct me if I'm wrong but I think 13B's only came in the 3rd gen which means they are all turbo and fuel injected. I have 3 RX7 books in the bathroom but I think it's nappy nap time
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Old 07-16-2003, 02:18 PM   #5
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i was under the impression that the older models were single turbo and the newer was twin.
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Old 07-16-2003, 02:20 PM   #6
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all of them are 13b...just depends on what generation we're talking about...
1st-no turbo
2nd-single turbo
3rd-twin turbo
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Old 07-16-2003, 02:22 PM   #7
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4th- triple turbo
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Old 07-16-2003, 02:24 PM   #8
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i am concerned about the 2nd and 3rd gen. what are the internal differnces. how much power can they hold.
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Old 07-16-2003, 02:27 PM   #9
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Quote:
Originally posted by ASUscooby
all of them are 13b...just depends on what generation we're talking about...
1st-no turbo
2nd-single turbo
3rd-twin turbo
no, they're not all 13B

there was a 12A used from 79 until 84, I think. Then for the last year of the 1st gen, they put a non-turbo 13B in it.

Then in 86, the single-turbo 13B came around, along with a better tuned NA. Then again in 88, they retuned both engines, giving more power...which remained the same until the 93TT.

I just don't know the serial numbers...
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Old 07-16-2003, 02:29 PM   #10
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And there you have it. The best info on the intarweb!
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Old 07-16-2003, 02:32 PM   #11
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A stock TT RX7 engine is good place to start. To get the most power you'll want to get a proper port job done. The engines respond very well to turbocharging, but are very sensative to detonation. You can easily blow a seal.

Matt
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Old 07-16-2003, 02:41 PM   #12
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whats the difference in the insides of the single and twin turbo motors. basically when i get the motor i will replace all of the seals and gaskets, but what else would i need to do. i will be making everything for it. i will be using a garrett turbo and a stand alone engine managment. if the internals of the motors are the same i will just go with the older version and put my own stuff on it.
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Old 07-16-2003, 03:09 PM   #13
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there isn't much to change inside. The rotors are all made the same. Just make sure you put 3mm apex seals on there, the 2mm stock seals are the ones that blow out easily.

Then by boring out the ports (namely the exhaust), you will pick up a bunch of power.
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Old 07-16-2003, 03:28 PM   #14
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My brother's RX-7



His listed stats:
Mods: ENGINE: TO4-E Turbine, HKS Wastegate, HKS Intercooler, HKS Racing Blow Off Valve, EXEDY Super Single Racing Clutch W/Flywheel, 3mm Apex Seals, NISMO GTR Fuel Pump, Aftermarket Water Seperator
EXHAUST: HKS Exhaust, GREDDY Intake Manifold
SUSPENSION: CUSCO Comp Zero I Adjustable Suspension
WHEELS: 17 inch RAYS Racing Rims, PROJECT U Racing Pads
ELECTRONICS: Apexi AVCR Boost Controller, APEXi FC/W Commander, APEXi Rev Speed Meter, APEXi AVC-R, DEFI Gauges (3)

~420ps

Looks like he needs to add 10 to his parking space.
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Old 07-16-2003, 03:51 PM   #15
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Dont forget to change all the vacuum hoses and upgrade the cooling system with a new better aluminum radiator. That along with changing all the seals and gaskets should get you going with a 'reliable' rotary






reliable and FI rotary usually dont go well, but hey who cares, it's only a project car right?
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Old 07-16-2003, 04:20 PM   #16
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mitch, what are you doing today. you should come up.
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Old 07-16-2003, 05:23 PM   #17
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you guys need to stop making topics like this, I almost had forgot about my obsession with the rx7and was thinking a M3 would be a nice next car... dam you guys!

how are the gear boxes on those cars?
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Old 07-16-2003, 05:33 PM   #18
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the 1st gen had a turbo in forign markets...

thats why the 2nd gen was called the turbo II... the second 13b to have a turbo.

the 3rd gen had twin sequential turbos, but i forget what the entire engine code was to designate between the turbo2 and the 3rd gen.
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Old 07-16-2003, 05:39 PM   #19
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PM sent
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Old 07-16-2003, 05:40 PM   #20
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bleah all crap. You need the 4 rotor. Theres a vid flotting around of one some guys made. Its short but youll get the point.
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Old 08-13-2003, 01:36 AM   #21
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There is the 20b which has three rotors. I believe people stick with the 13b motor for the balance.
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Old 08-13-2003, 02:24 AM   #22
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Quote:
Originally posted by JGard


no, they're not all 13B

there was a 12A used from 79 until 84, I think. Then for the last year of the 1st gen, they put a non-turbo 13B in it.
WRONG!!11~
The 12A was used in all US 1st-gen years, 79-85, in the S, GS, and GSL(LSD, Rear discs, fully optioned) models. The fuel injected 13B came for the 1984 model year, in the flagship GSL-SE model, which was around for the remaining two years of the 1st gen.
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Old 08-13-2003, 09:02 AM   #23
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meh, whatever, I was close.

The 13B was only in the last years... and yeah, only for certain models.

Regardless, I'll be in an 87GXL with 50,000 miles within 3 weeks
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