How-To’s

  • Used DIFFERENTIALS — have 6.All look like 83-85 12A’sShould all be 3.90 ratios.NO warranty, no returns, etc.Too big to ship — local pickup only. $100 each 74-78 “Ribcase” Bellhousing. Great for all kinds of conversions.Uses non-turbo diameter flywheel. Very hard to find.16x16x8$450 562-426-7960 Dump Cans Older Style (3) 10 Gallon each$100ConditionUsed – Fair$100 for all […]

  • In a Rotary engine, the port timing is equivalent to a camshaft in a piston engine. The higher the top of the port, the later the intake or exhaust is closing, and the longer the duration. On the exhaust port, the lower the bottom is, the sooner the port opens, and the longer the duration […]

  • The 86-92 RX7’s have “rear steer”. For those of you not familiar with this, it is a combination of rear suspension geometry, and compliant bushings that “make” the rear of the car steer into the turn. This is accomplished by making the rear of the car steer to the outside of the corner, which then […]

  • Rotor Weight and Compression chart is included in our Website for reference purposes. The weights listed are for production, unmodified rotors.

  • Year / Model Ratio 79-82 3.909 83-84 12A 3.933 84-85 13B GSLSE 4.076 85 12A 3.909 86-88 5-spd All 4.10 86-88 Automatic 3.909 89-92 Turbo 4.10 89-92 non-turbo, non LSD 4.10 89-90 non-turbo, viscous LSD, “GTUs” only 4.30 93-95 w/manual trans 4.10 93-95 w/automatic trans 3.909

  • Shipping TO Mazdatrix -PLEASE – Read all of this. Assume anything shipped to us will get the crap beat out of it / them by whatever shipper you use.YOU MUST insure for the replacement cost. Good luck collecting from the Post Office. We have NEVER collected a dime! The “hoops” they make you jump through […]

  • A common misconception of many people are the terms “Hot” spark plug, and “Cold” spark plug. The temperature rating of the plug refers to the running temperature of the physical spark plug – i.e. a “Hot” plug will retain more of the combustion heat in the plug itself, meaning not transfer the heat to the […]

  • This chart is not meant to be complete, or 100% accurate (there are too many variables), but it should give you an idea of what to look for. SYMPTOM Probable Problems / Solution Clutch pedal feels weak/dead. Won’t go into gear easily. Clutch hydraulics. Replace slave and/or master. Possible pressure plate, but be sure of […]

  • Stock Transmission Ratios Application 1st 2nd 3rd 4th 5th 6th 74-76 RX2, 3, 4, Cosmo, P/U 3.683 2.263 1.397 1.00 .862   77-78 RX3SP, 4, Cosmo 3.380 2.002 1.390 1.00 .791   79-80 RX7 3.674 2.217 1.432 1.00 .825   81-83 RX7 3.674 2.217 1.432 1.00 .825   84-85 RX7 12a 3.622 2.186 1.419 1.00 […]

  • This list is what we call “typical” parts needed to install a 48IDA Weber on a Rotary engine. Pick your manifold, choke size, emulsion tubes, jets, etc. — each part is as an “active” link you can click on – goes direct to the part (except the JEGS links at the bottom)- that you can […]

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