Canyon Run with my Atom2 - Aero Test

I had the chance to run my Atom2 this weekend to test out the new aero package. We installed the TMI sourced front factory wing on my Atom a couple of weeks ago. Now that we are an official Ariel Atom Dealer, we will offer this solution to clients. It attaches to a bracket that bolts to the frame at the nose. This bracket also secures the front tow hook. We had commissioned a rear wing design from Steve@Aerosim and had it built by ReVerie. The rear upright was complete and we had it powdercoated black. The wing is a dual element design that Steve spec'd for us. This rear wing will be an Atom2 offering only.

I took the car to Palomar Mountain, which is a road frequented by sportbikes, sports cars, RVs, trucks and the local police. I took a couple of fun back roads that are usually empty and unpatrolled to get to Palomar. The weather was in the low 70s. The Atom was extremely fast and pulled like a banshee. We had added Tom@Unique Fab's in-line radiator for the intercooler. I could detect no heat soak related slow down. It was hard to keep the car at full throttle for any length of time in the canyons. It was fast and ferocious. The increased rev limiter (now 7100 rpm) allowed me to stay in gear on certain corners - though the car makes enough torque that you can leave it in a higher gear. Since the car revs so quickly these added rpms make a huge difference.

The aero had the car feeling nicely planted. The front fenders can cause some slight lift at high speed. I usually remove them at the track to eliminate this issue. They were not removed as I was driving on the street. I also made some small adjustments to rebound on the Nitrons to deal with some of the bumps. The downforce was truly confidence inspiring. I also had side panels which reduced cabin buffeting and kept me from freezing in the morning. Overall, I was very happy with the result.

Further tuning will be done at the track...hopefully this weekend at Willow Springs.

Atom Power Upgrade

We have slowly been upgrading components on the Atom to get it to match the Secant Type I powertrain. 280hp/241 ft-lb power output is the target. I secured a new intake and additional radiator for the intercooler system from Tom@Unique to help us get there.

We installed these bits along with a new Laminova endplate that reroutes the coolant through the intercooler in a manner that achieves improved cooling efficiency. Removing the Laminova tubes takes patience and a gentle touch - neither of which I have much of. This picture shows the stock end plate with 2 hose connections. The new endplate has 3 connections to help flow coolant quicker.

We have a larger water pump that we looked at switching but choose to stick with the stock pump for now. The additional plumbing and wiring required for the new pump dissuaded me from tackling that task at this time. Tom & Ryan from Secant assured me that the stock pump should work well.

The new ic radiator from Tom is plumbed in-line with the stock radiator. The coolant now runs in this manner: pump ->1st rad -> 2nd rad -> IC -> pump. I will need to modify the plastic cowl a bit to clear the front frame that supports the rad. The polished frame reveals Tom's hotrodder roots. The welds on this unit are excellent. Nice work Tom!

I'm anticipating much improved cooling and reduced heat soak issues. The new radiator gets high pressure air as it is positioned in the stock location for the intake. We got creative with the hose plumbing and connections and have sorted a neat configuration. The downside is losing the original intake snorkel - but form must follow function!

The stock intake was discarded in favor of Tom's intake. It delivers air in a nice straight shot - unlike the convoluted stock intake. The MAF should also be much happier. We installed this without difficulty. The filter resides just below the remote oil cooler and appears to block some airflow to this rad. Since oil temps have never been an issue for me, this seems like a fair trade off. Nothing comes free.

We swapped out the in-line fuel filter which of course required a special tool. The # of trips I've made to the store is maddening with this upgrade. 8^) I bought a smaller belt as well since the new pulley is smaller. Though the tensioner appeared to take up much of the slack, it was not enough for the stock belt. NAPA is close so I simply bought a smaller one as replacement.

Steve from Secant arrives on Friday to begin the tuning...