Pettit Built Engines


Pettit Built Engines Specs / Pricing

Mazda Rotary Engines produced from 1970-2012

It is easy  to make a rotary fast, but our expertise is proven to make rotary engines last!!!!!


Please contact us for latest pricing and availability.





The best most cost effective way to obtain  a Pettit Built Engine is to ship or bring your old engine to us. If your main core parts are within usable


tolerance,  we can often refurbish as needed and build a fresh  Street Ported & Blueprinted Pettit Stage 1 engine for as little as $3650. and Stage 2 for $4050 This applies to nearly all 2 rotor engines produced by Mazda from 1970 thru 2012.


RX8 Renesis, 4 & 6 port    2003-2012 

13B FD TT & REW,           1991-2002 

13B 6 port n/a, FB, FC      1984-1991 

13B 4 port n/a and turbo   1974-1991 

13B peripheral port            ALL YEARS 

10A & 12A                         ALL YEARS


20B three rotor - $6850     ALL YEARS  from your usable core. Included is rotor hsg, ex sleeve & cooling mods machining. 

 13G three rotor, $ call.     

Add $250 for dry sump refurbishing.


 One very popular service we offer is allowing customers to participate in the disassembly inspection and failure analysis of their engine (20-40 min). 


Once completed, we can provide an accurate written quote for your acceptance. Standard time to completion is 8-10 working days. We also offer “just in time” builds for race teams and customers world wide, 1-3 days. Please call for availability and pricing at 561-844-2258.



OTS (off the shelf):

 Another way to get a Pettit Built Engine.


OTS pricing:

If you have no core we can get a Pettit Built OTS Engine right to your door. At this time due to rising prices and a shortage of core parts, 13b series 6 - 8 engines to fit all 1992-2002 RX7 FD cars use all brand new parts and have no core charge typical cost:

 Stage 1 $9850

 Stage 2 $10200


OTS 13b Renesis engines for series 1 or 2 all come with new rotor housings, rotors, gears and e-shafts. Due to all the new parts, our standard 2 rotor Stage I build is $7500, plus a core charge of  $1000  = $8500 plus shipping.

Add $400 for stage 2 

Pettit Built Renesis Stages

All dyno and track tested and proven for both street and racing applications. 

Every Pettit Built Renesis is blueprinted and street ported with our proprietary mods which provide added cooling to the exhaust ports minimizing side housing surface deformation at outer port edges, as well as the area around leading spark plugs on the rotor housings.




our standard Pettit Built Renesis, blueprinted and street ported with all our mods, procedures, and QC as listed below as well as oil system mods that improve oiling, main and rotor bearings clearanced to race p-specs, micro finish on all critical surfaces, clean room assembled with genuine Mazda OEM apex seals, static compression tested, capped and skin sealed for shipping. 



has all the mods of “PBR I” plus genuine Mazda HD 2mm 2 piece full depth apex seals from 99-02 RX7 FD. With these apex seals, the load carrying surface area (main wear area) is increased more than 50% and thus reduces surface loads more than 50% as well. In theory this should double apex seal life. More data is needed to confirm this. So far there have been no failures to inspect. This setup requires special CNC machining of apex grooves and special corner seals. 



has all the mods of build I & II plus it uses lower compression 13b RX7 FD rotors. This setup also requires special CNC machining to accept custom made outer gas sealing rings and also requires special balancing. This is the right choice with forced induction applications where more than 350 whp is desired





is a custom build, race build, and / or special purpose build. Please call for details.  


With RX8 Renesis engines, make sure you take pictures of hose and wire harness routing and also label the injector plugs accurately because It's really easy to mix them up.

We also recommend leaving the lower Intake Manifold and the injectors on the engine. Renesis intakes usually have significant carbon buildup on all the valves and inside the runners, so it's easy to damage the auxiliary port tubes and linkage when removing the lower intake manifold. They need to be disassembled very carefully, properly cleaned, serviced and indexed so the aux port, SSV and VDI valves open and close in the right position working smoothly. Pictured below is a Pettit blueprinted, ported and fluent’ matched Renesis lower intake. 




We also perform some beneficial flow modifications to the plenum VDI area as pictured above, then reassemble it to your engine and test the operation of the valves.

Included at no charge we clean and flow the injectors and pressure check the fuel system a simple step for us to insure your Pettit Built Engine delivers performance and longevity beyond expectation and no injector worries for you.  


Pettit Built 13b Turbo Stages

13b RE TT and 13b TT Series 6, 7 & 8 


Our Stage 1 :

build is blueprinted and street ported resulting in improved flow and efficiency with very small changes in intake and exhaust port timing, benefits are better fuel economy as well as more power delivered through all rpm ranges and boost levels. Our Stage 1 build when properly tuned, having a back pressure ratio,1:1 or less  and maintaining a charge temperature <125F@ 16-18 psi/boost will produce 200+ hp / rotor.


On a two-rotor engine this is 400 hp, sure these engines will make more power but then other factors like fuel and ignition inconsistencies become more critical and these variables can lead to unexpected problems. 


Our Stage 2:

build is blueprinted and power ported, improving intake and exhaust port flow by 20% delivering even more power through all the rpm ranges and boost levels. Our Stage 2 build when properly tuned, having a back pressure ratio  0.8:1 or less and maintaining a charge temperature <125F @ 19-23 psi/boost will produce 275+ hp / rotor. 

On a two-rotor engine this is 550 hp, This same engine running methanol properly tuned at 50 -60lb  of boost will produce 800+ hp.



Our Stage 3:

build has special rotor housings with peripheral Intake ports. They have many of the same characteristics as bridgeports except there's no Interruption in the flow path, just one big hole like the exhaust port. With this setup original side ports are closed off and it's necessary to build a custom intake manifold. Since the torque and power move higher in the RPM range it is more likely to have oil foaming which can damage bearings, it is highly recommended to use dry sump lubrication systems for these applications.



Engine Life

is totally dependent on proper care. The best longevity is achieved by following our simple guide, basically never overheat the engine, easy warm ups and cool downs (no boost) keep clean oil (no fuel smell) and to maximize performance and longevity always premix Protek-R fuel lube with every tank at a ratio of 100:1 or approximately 1.3 oz per gallon of fuel. For boost levels above 16 lbs, use a 70:1 ratio or 1.8 oz per gallon of fuel.  




A gallon of Protek-R fuel lubricant is included with every Pettit  engine. Of equal importance is using high quality fuel, with boost set above 15 psi, 100 octane or higher is recommended. All naturally aspirated rotary engines including Renesis run best on 87 octane fuel.
For 30 years & counting Pettit Built engines are still performing beyond expectation all around the world.


Core Charges


Engine prices do not reflect core or shipping charges. The new series 8 FD engines have no core charge, but most other OTS engines carry a core charge of $800 - $1000. A final cost for your acceptance is provided prior to every build. Prices are also subject to change and may increase or decrease depending on several factors that include availability of new Mazda parts, usable cores, and discounts from our purchase volumes. 

Racing History

  In the past 25 years Pettit Built Rotary Engines have earned a worldwide reputation for unsurpassed quality, top performance, and outstanding reliability. Our history of racing victories and Championships in both endurance and sprint racing are a result of our passion for improving rotary engines and paying close attention to small details.   Endurance races like the Rolex 24 & 12 hours of Sebring to our recent Victories in time attack sprints as well as over 2000 Pettit Built engines delivered to clients around the globe has built our reputation for providing top performance and unmatched longevity.

It is easy  to make a rotary fast, but our expertise is proven to make rotary engines last.


 Top Quality:

So what makes Pettit engines the best and how is that done for over 2000 engines?
1.  It all starts with the careful inspection of all the selected components that make up every Pettit Built Engine.           
2. Even the new parts are carefully inspected, measured, and approved for each and every engine, then all modifications, porting, machining blueprinting, and finishing to all critical surfaces are completed.
3. Next the parts receive a high temperature detergent bath and high pressure rinse by a 10hp cleaning machine.
4. After this, pre-assembly begins and more inspections. To pass the pre-assembly inspections, a critical surface finish of 12-18 micron is required. To consistently achieve these high standards Pettit developed several proprietary methods for critical surface finishing. 
5. Next oil galleys and internal passages are inspected, a final cleaning is performed and protective coatings are applied to the aluminum and cast iron exterior surfaces.
6. Last stop is the engine room, each part gets another inspection and all critical openings are sealed with caps and plugs. During the final assembly process yet another inspection is performed for a total of eight quality control inspections exceeding industry standards. Finally a static compression test is performed and it’s shrink wrapped for protection, a few more reasons
Pettit Built Engines are considered by many to be the best. 


Monster Ports




Extra large and monster ports (common with older naturally aspirated and drag race engines) can compromise reliability. Since the seals, both apex and side pass over larger openings there is more flex resulting in accelerated seal wear as well as greater possibility for catastrophic failures.  All this should be especially evident when most conversations about turbo rotary engines still mention seal failures.


Bridge Ports


We hear and get many questions about bridge port's,  most commonly used with naturally aspirated rotaries for road racing and drag racing where the main concern is performance above 6000 RPM and no need for drivability in these applications. It is the easiest way to lengthen the port open time getting more air and fuel in on naturally aspirated engines.

It also moves the powerband up in the RPM range thus adding power; however, they create an interruption in the intake flow causing violent turbulence which can be a challenge to tune, also to best take advantage of this type port requires nearly open exhaust having little or no back pressure, even then it really hurts low end power and drivability and it's not uncommon to foul spark plugs at the worst possible times.  

For all the effort, machining, poor life expectancy, etc..  the expected horsepower gains with turbocharged or supercharged rotaries is about the equivalent of adding a pound or two of boost. Typically bridgeporting is not a good idea for street use unless you like punishment, since these port modifications move the torque and power up in the RPM range, the higher revs are more likely to cause oil foaming which can cause smoking and damage bearings. It is highly recommended to use dry sump lubrication systems for these applications.



Apex Seals

Unless other arrangements are made, all Pettit Built engines use the latest apex seal technology from Mazda, dual sprung 2mm 2 piece, these seals use an improved electron beam chill hardening process (now digitally controlled) on the top portion of the seal where it contacts the rotor housing surface, to our knowledge this technology has not made it to the aftermarket.




 The only comparable / improved seals are ceramic and add about $2000-$3000 to the cost of a 2 rotor build. 

Peripheral Intake  Ports

Peripheral intake ports have many of the same characteristics as bridgeports except there's no Interruption in the flow path, just one big hole like the exhaust port. With this setup original side ports are filled with epoxy and it's necessary to build a custom intake manifold. 

Build Your Engine 

Due to a shortage of engine core parts the best and most cost effective method for obtaining a Pettit Built Engine is to ship us your old engine, once here, we disassemble it, perform wear pattern / failure analysis inspections and call or email you with our findings and the exact cost to build the engine you desire.

The old parts tell a story and reveal the causes of problems and / or failures that once corrected can help prevent a future recurrence. We also offer customers to participate in disassembly & inspection of their engine for a first look, most are surprised with the results and glad to have had the opportunity and first look, fun and popular.  


Engine Shipping 

If you're ready to ship us your engine, the oil and coolant must be completely drained.
Anything leaking can delay the shipment. 
Unless other arrangements are made we expect a short block, if a proper flywheel puller is not available, do not use a hammer as depicted on you tube, leave it on and we will remove, replace and properly tighten it at no charge. Another service we offer at no charge is to clean and flow the injectors, we want to be sure the injectors are right so your engine runs perfectly, you can send them with the engine, with FD injectors, leave them in the fuel rails.
Then, ratchet strap it to a small pallet and give us a call, we can have it picked up or you can drop it at a local terminal to save $$$. Either way we will email a bill of lading. You will need to print 3 copies, One to keep, one to attach to the engine and one for the truck driver or the terminal clerk, if dropping off.   Call or email for details  561-844-2258