Rotorua Precision Motors

Rotorua Precision Motors High quality engine machining/rebuiding and modification. Your dream is our goal.

One for the Holden fans.
12/04/2026

One for the Holden fans.

Another work of art Street tuned. Running on pump gas 6lbs boost. 827hp @ 6500697ftlbs @ 5600
17/11/2025

Another work of art
Street tuned. Running on pump gas

6lbs boost.

827hp @ 6500

697ftlbs @ 5600

A change from V8’s this week on the flow bench. Working some magic on this motorbike head.
05/11/2025

A change from V8’s this week on the flow bench. Working some magic on this motorbike head.

Holden 308 getting a wake up call. Porting cast iron is a big job and it’s alway been a challenge to find the right burs...
11/09/2025

Holden 308 getting a wake up call. Porting cast iron is a big job and it’s alway been a challenge to find the right burs until Greg started killer carbide burs and made everyone’s life a whole lot better.
Here is a few pics of the first stages of porting.

Chrysler 360. The motor that has become more talked about than ever seen. They haven’t disappeared into history just yet...
02/08/2025

Chrysler 360.
The motor that has become more talked about than ever seen.
They haven’t disappeared into history just yet but this one did put up a fight on the way back to the living.
First time we have tried Aeroflow cylinder heads here and first impression was a good one.
They flow just as advertised and the machining is finished well.
Out of the box a very good performer.

1953 dodge 230ci flat head. Brought back to life after many years of sitting around under a bench somewhere. Has a few u...
05/06/2025

1953 dodge 230ci flat head.

Brought back to life after many years of sitting around under a bench somewhere.

Has a few upgrades to help it cope with today’s unleaded fuel.

Compression raised and a nice port job to match.

We have done quite a few Nissan SR20det engines in the past months. Here is one our favourite builds.
21/05/2025

We have done quite a few Nissan SR20det engines in the past months. Here is one our favourite builds.

186 Holden brought back to life.
13/05/2025

186 Holden brought back to life.

347 ford Windsor.
31/01/2025

347 ford Windsor.

26/11/2024

Pro charged 400 chev going over 900hp.
Results at the end.

Over 900HP on pump gas Pro charged 400 chev topped off with a Holley sniper system. Dart block was used to hold it all t...
26/11/2024

Over 900HP on pump gas Pro charged 400 chev topped off with a Holley sniper system.
Dart block was used to hold it all together.
The rotating assembly is ready to go to war at the touch of the throttle thanks to its callies crankshaft, H beam rods and forged pistons with thick wall gudgeon pins.

Although there was more power to be had it was coming to the end of the Holley sniper fuel system capabilities and customer is happy with the results so we left it there.

Watch the engine in action on the dyno in the following post.

Address

73 Clayton Road
Rotorua
3015

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+64272046494

Website

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