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N/A 13B performance ‘upgrades’

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N/A 13B performance ‘upgrades’

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Old 11-08-18, 12:40 AM
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N/A 13B performance ‘upgrades’

new to any kind of Mazda, recently bought a 2nd gen, na, 13b FC vert and took it out to a local track for a drift event....I overheated the car on my last run and it doesn’t run anymore. Crank/no start. Other than that, I was able to get it started to load it on the trailer, and back off to readjust.. No smoke, normal operating temp, sounded and drove just fine.... but would not start to come off the trailer once I got it home. I’m not too worried as it’s the end of the season and I have all winter to do what I need. I’ll start with spark plugs and an oil change/ compression test. That being said...I’m looking into options for more power whilst avoiding any turbo nonsense. I’ve read a little about bridgeporting. And I’m considering a better intake, and have been told about speeduino ecu’s. Any other options out there? What are the downfalls/plus sides to Bridgeport? (I do not plan to daily drive this car at all. It’s strictly a track car.)
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Old 11-08-18, 02:07 PM
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I know it seems a little obvious, but overheating is a big no-no for these engines. To start, check the compression and also check the chambers for antifreeze.

As far as performance upgrades are concerned, it really comes down to what you want to accomplish (within reason) and what you're willing to do to achieve it.
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Old 11-11-18, 02:29 AM
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Higher numerical ratio diff gears, auto counterweight, aftermarket flywheel and clutch and scatter shield/blanket if you don't have them already. If it is mostly for track use long primary exhaust divided to the diff area, porting, water/water wetter mix instead of coolant (if your ambient temps don't go below freezing), better ignition, fine wire irridium plugs, aftermarket ecu, clearanced rotating assembly if you have to pull it down for water seals anyway, flex/ethanol fuel if possible.

are you premixing oil or is it running an omp? If it is stepper motor controlled omp i would stick with aftermarket ecus that already have rotary support features not sure what speeduino has to offer but i suspect mega/microsquirt stuff is more developed if you are budget constrained.

Last edited by Slides; 11-11-18 at 02:33 AM.
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Old 11-12-18, 04:26 PM
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There isnt a ton of power to be had from NA rotaries, 200whp is a reasonable goal on a stock block, 250whp with aggressive porting. More is possible, but not typical without radical work.

As far as power upgrades other than porting:
Make sure everything factory is working properly, especially the 6th port actuators, and VDI as well if the car is an 89-91. If these aren't functioning the car will suffer tremendous top end power loss.
The first big power mod is a full exhaust. Pick up a quality one such as racing beat, rotary engines will burn the packing out of cheap mufflers quickly.
The next best power mod is a stand alone ecu, adaptronic makes a plug and play and is pretty popular right now.
After those there are a bunch of small mods that eventually add up.
A high flow panel filter for the stock airbox is your best bet on an intake to avoid it becoming a hot air intake.
pineapple racing and atkins racing both make aftermarket 6 port sleeve options
ignition upgrades such as wires and an ignition amplifier such as the MSD 6a are pretty popular, factory coils are very adequate.
removal of accessories such as AC, powersteering, air pump.
Modifying the throttlebody to remove the secondary throttle plates, warmup system etc

If the engine needs to be rebuilt porting can be a good power adder but keep in mind the more aggressive of porting the higher the power but the rpm band also shifts up, drive-ability goes down, and fuel economy goes down.For most people a streetport provides the best compromise of qualities.
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Old 11-12-18, 07:12 PM
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great, thank you! Some good stuff to start looking into
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Old 11-13-18, 11:57 AM
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Originally Posted by Templeton View Post
There isnt a ton of power to be had from NA rotaries, 200whp is a reasonable goal on a stock block, 250whp with aggressive porting. More is possible, but not typical without radical work.

As far as power upgrades other than porting:
Make sure everything factory is working properly, especially the 6th port actuators, and VDI as well if the car is an 89-91. If these aren't functioning the car will suffer tremendous top end power loss.
The first big power mod is a full exhaust.......
Great advice! The rotary really responds to exhaust and intake upgrades. On my 3rd gen, I used a Dwyer differential pressure gauge to find restrictions in the intake, and like Templeton, found that a simple drop in filter worked great with my oem box, although in my case, I had to revise the path of air to and from that box. Like he said, it avoids creating a hot air intake.

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