Davimac Motorsports

11/08/2026

Volume up!!. Dyno run. Dropped peak power by about 300 rpm, not as much as we would have liked but the engine seems happy.

08/08/2026

Just a little update video on what we've been doing for the last few weeks.

21/07/2026

Got the engine all back together. We changed the intake to a Holley high RAM to get a bit longer runner length than what we did have on it. Change the intake valve to titanium and the exhaust valves to hollow stem stainless valves. We swap the cam to one that has slightly less duration but has the same lift and ramp rate. The goal is to bring our peak power from 8300 down to about 7500.

21/06/2026

Diff updates for the ultra4.

16/06/2026

We've been having trouble with our pinion supports on a high pinion diffs with the front pinion bearing failing due to high pinion diffs in the rear pulling on the front bearing. The bearing on the right is the standard bearing and the bearing on the left is the one we replacing it with. We are also adding an oil feed line to the front of the pinion to make sure that the bearings get lubricated.

14/06/2026

We're going to have a crack at being ready for the Don River Dash in Sept. We've made some updates to the ultra4 to improve the cooling at higher speeds, the motor is going to be pulled out because we think the valves are tuliping and beefed up one of the bash plates under the auto.

Mitch Dialed Offroad will be helping over the next few months. Finke has got us excited to be racing and it will be sad to miss another Don.

26/05/2026

Managed to finish Saturday and Sunday URC competition with the portal gear looking like this. No wonder the rock crawler wasn't feeling great 😅

25/05/2026

We placed equal 10ish overall in the Unlimited Class at URC Molong.

As you can see, Day 1 didn’t go to plan 😅 . We had a portal input shaft let go on Track 2 which we fixed before the night stage. then rolled on the night stage after the front left slipped. So we ended up near the bottom of the leaderboard.

Day 2 was much better. Shan and Jordy found their rhythm and completed the daytime tracks. The car’s portal started clunking during the day though, and by the end of it, it was getting bad enough that we weren’t sure how much longer it was going to last.

Day 3, the plan was to keep racing for as long as the portal gear would hold up.
The boys got through the first two tracks with a few cone penalties here and there.

A two-minute DNF track was introduced to help separate the top leaders. Shan abused it up Gate 1. Drove the car like an ultra4 and pushed 2 trees over to avoid a reverse penalty. Timed out in the end, but it was a solid effort and was sure it was good to watch.

Overall, a very good weekend. We even drove the car back onto the trailer! 🙌🏼

Thank you to Navy Jordy, Mitch and Jake for travelling down from QLD, Bran, Beck, Rach, Chrisso, our families, and everyone who came out to support the team. It was great catching up with you all.

Congratulations to all and thanks to URC for putting on a very well-run event.

Ultimate Rock Crawling

24/05/2026

22/05/2026

Day one at URC resulted in a damaged portal. Attempting an undercut climb at gate 3 of “On Crack” the front axle loaded up and the Portal input shaft let go 🫣 Once we returned to the shed we also found twisted splines on the front axle.

We are all patched up and ready to go for the night stage now!

Ultimate Rock Crawling