Fast Lap at Sebring in Moya Motorsports Datsun 510


As stated in our previous post, we experienced a failure of our new engine during the Test Session at Road Atlanta in late April. Luckily Alex shut down the engine when he detected something amiss while on track. This prevented catastrophic damage, but will require full disassembly. We removed the engine at the track and delivered it to our engine builder, who accepted responsibility and finished disassembling the engine a week later. Stay tuned for our progress. Soon we will be back on the dyno.

HSR’s 2015 The Mitty

Moya Motorsports arrived at the 2015 Mitty confident and not expecting any significant problems. However, a simple $0.90 part triggered a chain of events that damaged our new engine, incredibly ending our weekend on the first day.

During a Test Session, the freeze plug adjacent to the starter motor was expelled:

1) Into the last lap of the session, it was noted that the water and oil temperatures climbed above normal.
2) Initially, it was not cause for concern since it was a new engine.
3) The engine was shut down as we rolled into the pits to investigate, when the missing freeze plug was detected.
4) Since the coolant temperature sensor lost contact with the water, it could not indicate the actual maximum engine temperature reached.
5) A new plug was installed, water was added and the engine started, only to notice bubbling in the coolant expansion tank, indicating a possible failed head gasket.
6) The cylinder head was removed for further investigation when some light scoring of the cylinder walls was noted.
7) Rather than risking further damage, the engine was removed and turned over to the engine builder who was present at the event.

Since a sudden loss of coolant may not be detected by the gauge, a coolant pressure warning will be installed.

We thank all our well-wishers and hope to put on a better show next time.

Savannah, October 2014 – Additional Pictures and Video

This video is from clips from a hand-heald camera. The pictures are from Bimmerfest.

We reported on September 18th that, after significant updates to our Datsun 510, we would race at Savannah and then Sebring before the end of the year. However, although the car ran very strongly at Savannah, we have decided that our engine has enough racing hours to warrant an inspection of critical internal components. This means that we cannot do Sebring in December. Our schedule is very tight, but we hope to be ready for the first vintage race of the 2015 season at Palm Beach International Raceway at the end of January.


2014 HSR Savannah Speed Classic

The Moya Motorsports Datsun 510 had not raced since last December at Sebring. This was our second visit to this 10-turn, 2-mile course. Savannah was cool and dry, and our test session at Homestead earlier in October had been hot and humid. This dictated a minor correction in carburetor jetting before we even fired up the engine. Between practice, qualifying and races, we were on track seven times. In between sessions, we made other small adjustments and our lap times continued to improve, besting our fastest time from last year by almost three seconds. Although practice and qualifying sessions were 10 to 14 laps each, the two races were only seven laps. During the last race, our times improved with each lap. We traded places a few times with three other cars, setting our fastest time on lap four, when a yellow flag was displayed due to oil on the track from a car that DNF. The last three laps of this race were run under yellow, preventing any further progress. We finished 2nd in class in both races and were the only 510 at the event, but really enjoyed the close competition with BMW 2002s, Alfa Duettos, a Pinto, 911s, 914s, Mazda MX5, Toyota MR2, Corvairs and others.

The 4 minute video is a collection of clips from practice and the two races.

Heading to Savannah on October 24th

Work on our Datsun 510 was completed last Thursday with suspension alignment and corner weighting. Yesterday, we had an excellent opportunity to track-test locally at Homestead-Miami Motor Speedway with the FARA Group. The long work hours of the previous months paid off, as the racecar performed flawlessly. Test conditions were perfect, as there was little traffic, which allowed us to conduct conclusive high-speed testing and adjustment of our brake balance. The video shows part of this test before final adjustment. We thank all family and friends who showed their support and came to the test session.
Crunch time is over, as we are ready to race and have two weekends before heading 500 miles north to HSR’s Savannah Speed Classic on October 23-26.

Take a look at the pictures below provided by our new Track Friend Tony Sarria from Tony Sarria Photography. He provided us with some fine examples of his work and these are just a few.

“Street” Test

Worked nine hours yesterday 9/27/14 getting the Datsun completed. Other than alignment and corner-weighting, the racecar is ready. A quick street test showed that “it works”. Next race is Savannah at the end of October.

Almost Back in Action

Although we haven’t yet raced this year, we expect to be back in action soon.  We are working very hard to get the car ready and have our sights set on Savannah on October 24th and Sebring later in December. A full season is planned for next year.

This short video shows some clips from earlier events at Road Atlanta.  We plan to race there in April.


Can you guess where, when, and who they are?


Clue: They are both racing drivers...


We haven’t yet competed this year. There have been some setbacks while conducting maintenance/repair and we’re working on solutions. One delay was caused by problems with the installation of a hydraulic clutch release that replaces the fork release. We decided to switch to the hydraulic system because the increased force required for the competition clutch to release had already caused damage to the standard fork release (see pic of damage on our September 28, 2013 post). The installation of the hydraulic clutch release has been completed, although not yet tested.

We expect to be back on track after the summer, and will be providing further updates as we approach completion of all work.