Recent content by ERP

I've published the 3D model on GrabCAD, STL format. GrabCAD - CAD library The 8" speaker model is; Dayton Audio RS225P-4 8" Reference Paper Woofer 4 Ohm.

Gotta have more cowbell

I also agree that the base system lacks quality in the mid and low range. I just upgraded my speakers and i'm much happier with the mid quality, but I feel a powered subwoofer is still needed. Upgrading the speakers is a DIY project, and not very difficulty. It just requires some literal cut and...

I stumbled across this amazingly fun looking electric vehicle the other day. If you have an electric car and an electric lawnmower, an electric paraglider is the next logical step. I'm hoping this campaign can reach its goal. REVOLT - Your revolutionary and affordable aircraft.

The standard audio package on the Tesla isn't bad, but it is definitely not a high quality system. The sound is muddy, especially at higher volumes, and is lacking a low frequency punch. My goal was to see what type of improvement I could make by only upgrading the door speakers and leaving them...

Hint, it's from a movie

Shame on that driver, he needs to wash that car.

You need to learn that in a race car with a 6 point harness and the driver wearing a Hans device, that the airbags add no protection. Because the driver isn't going to move far enough to contact them. Airbags are needed when the driver and passengers aren't fully restrained. The roll cage is...

It just finished the race with a time of 11:48 with an average speed of 61 mph over the 12 mile coarse. That's a good time and it looks like the weather held up for the run. I wonder how much battery overheating affected the cars performance, it was hinted at in the video. Modified electrics are...

The race is today and weather is currently fantastic. I hope it does well.

A low density altitude is what's required to maximize ICE performance. But for our electrics you want a high density altitude. At Bandimere outside Denver, I've seen conditions put the number over 10k ft.

Another small factor is that during braking on an ICE, the injectors shut off when the throttle closes. This stops new heat from being put into the engine for a short time. But on the Tesla, the motors become generators and convert mechanical energy back into electrical energy. Some heat is...

The brake lights should not come one with regen at all. As a life long manual car driver I dislike this feature. I have always used engine braking to slow my cars, I don't need the brake lights when I bleed off some speed. I only need them for hard braking. The Tesla regen brake lights make the...

The problem is most pronounced on highway 24 climbing out of Colorado Springs to Woodland Park. It's a divided highway with two lanes in each direction. There are several miles of curvy canyon roads, but no switchbacks. The speed limit drops from 55 to 45 through this section. Autopilot does not...

I can't stand this feature of TACC. The car slows significantly more than necessary for curves (I personally would prefer no slowing at all). Driving at a 45 mph speed limit, the car will slow to 30 mph for a tight curve, causing a line of cars to bunch up behind me. The Tesla and the cars...