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Monday 9am - 2:30pm Tuesday 9am - 2:30pm Wednesday 9am - 6pm Thursday 9am - 6pm Friday 9am - 6pm

Ovalap Engineering

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Ovalap Engineering

Standard and performance Mazda rotary engine specialist.

30/08/2025

Fresh motor built for a customer who purchased through our trade me advertisement. Lots of goodies in this one, will be run as a na but she’s built to handle some punishment as a turbo also!

Features

- Full cut Bridgeport fc plates
- Fc turbo housings
- Fd side clearanced rotors
- Race balanced rotating assembly
- 12a front cover and early 13b sump for front mounted applications
- Half inch stud kit
- TDC alignment
- Hardened stat gears
- SCR power seals 💪
- OEM mazda seals throughout
- Fd bigger bearing front stack
- Clearanced bearings and adequate oil modifications

If your interested in a new motor contact us as we have builds in progress. 13b pp, 20b semi pp, 13b semi pp etc

16/08/2025

Awesome news

09/08/2025

Motor of the Day, Week… maybe even Month!
This one’s a personal favourite.
potaka stunning RX2 sedan is running one of our 💪 built 13B FD peripheral port blocks — purchased from us and finished off with his own hard work in the bay.

Build highlights:
• Brand new 13B PP housings
• Green Brothers Racing CNC premium P-ports
• FD irons
• High-comp rotors
• Race-balanced rotating assembly
• FD oiling system 💪
• Hardened stationary gears
• Multi-window bearings
• Tip-clearanced rotors
• CNC PP intake flanges
• 2mm SCR power seals 💪

Easily one of the toughest RX2 sedans out there — and you just can’t beat that black 👌
Huge thanks to .potaka for choosing us for the heart of the build 😎

08/08/2025

Motor of the day!

fresh 12a full cut bridge port!

- 12a tall port center iron
- r5 end plates
- race balanced rotating assembly
- Fd stat gear with window bearing
- adequate oil mods
- scr power seals 💪
- mazda seal kit through out
- new green brother flywheel
- new clutch kit
- accurate TDC alignment

Looking forward to seeing this brapping around town. Have a good weekend errbody 🙂

30/07/2025

Motor of the morning

Here’s a nice brand new Fd 500-800 hp capable motor we built for a good friend of mine

-cnc ported plates
-extra dowels for high boost
-side clearanced rotors
-race balanced assembly
-2mm scr power seals 💪
-OEM mazda seals for the rest

22/07/2025

Motor of the morning…

Nice little 12a bridge port we built for a customer last year.

Features:

- Bridgeported side irons
- Balanced rotating assembly
- OEM seal kit throughout
- Scr power seals 💪
- Solid corner seals
- Vapour blasted housings
- New bearings

Hope you have a good day 🙂

20/07/2025

Motor of the morning…

Next in line is this nice Fd Bridgeport turbo block we built last year, features:

- Bridgeported irons (turbo)
- Dowelled for high boost (x8 extra dowels)
- Race balanced rotating assembly
- 2mm scr power seals 💪
- New OEM seal kit through out
- 12ib chrome olly flywheel
- OVALAP hd clutch kit
- Vinnyfab turbo manifold
- Pulsar 366sxe turbo
- 300kw on run in tune

We have built a lot of Fd3s 300-400kw engine packages, as it’s one of our favourite cars that’s we like to specialize in. 300-400kw is achievable on 98 pump gas, and in my opinion is the perfect amount of power for a street Fd, any more power and you will need to switch to alternative fuel and upgrade your gearbox. Above the 400kw is where it starts getting very expensive and excessive for the street.

12/07/2025

Motor of the day, 13b FD full cut Bridgeport NA,built last year.

Starting with a FD crate motor it was pulled down and replaced with high comp rotating assembly.

Details:

-FD plates (bridgported)
-FD rotor housings
-FD stat gears
-FD Eshaft
-High compression rotors
-New chromoly flywheel
-New 12at front cover
-Early 13b sump and pick up
-S5 water pump and housing
-Gilmer drive kit and more++

Few little Easter eggs added to this motor with the rotor shaped oil cap and dipstick.

11/07/2025

Motor of the morning, I built this 13b PP back in August of last year to on sell, it sold quick! Details as follows:

-FD plates
-46mm PP rotor housings
-High comp rotating assembly
-Hardened stat gears
-New seals,springs and bearings
-2mm SCR power seals 💪
-New 12at front cover
-New early 13b sump and pick up
-Race balanced assembly

Currently building another one of these up to on sell. Being my favourite type of engine I have built about 5 of these pre built pp motors and they do sell quick, all still running today with happy customers 🙂
Next one will be gloss black with vapour blasted housings .Dm to enquire

08/07/2025

JC Cosmo semi pp turbo block

We started with mint low km jc block and did the works.

-Semi pp machining
-Water plates
-Clearanced rotors
-Dowelled for boost
-2mm power seals
-Race balancing
-Stat gear upgrades
-Muilti window bearings
-2mm power seals 💪
-twin plate quarter master clutch
-and more ++

Will post more motors tomorrow!

Address

Unit 1, 5 York Avenue, Mount Maunganui
Tauranga
3116

Opening Hours

Monday	9am - 2:30pm
Tuesday	9am - 2:30pm
Wednesday	9am - 6pm
Thursday	9am - 6pm
Friday	9am - 6pm

Telephone

+64221558736

Website

http://www.rxnzrotary.co.nz/

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