June 12th, 2017 | by deltaautomotive
After a few months of delays and planning work, Delta is kicking off the next phase in construction of our Ligero prototype. The fiddly jobs of plumbing in the radiators and mapping out the exhaust system are complete, and after a lot of deliberation we’ve decided to change tack with the power plant for the Ligero. Whilst the AMG donk and Porsche 996 combo would have been perfect for the task, it proved to be a little complicated and expensive for what we wanted for the car. Furthermore, with a view to limited production of the cars, that combination would be a little too unique for reliable sourcing of parts for future cars. With all that in mind, we’ve decided on a Porsche Boxster as the organ donor for the drive train for our prototype. By cutting away the AMG donor, we’ve also liberated ourselves of the constraints of the AMG mid-clip that we had planned to use for the centre of the car, and was causing us headaches in the cabin and leg space departments. It’s been back to the drawing board to some degree with the new plan, but in the long run we feel that it will be a much better solution. The Porsche engine will obviously not supply the power of the AMG engine, but we have a plan for that as well! First things first however, we want to get an operational prototype on the road and then look to refine the car by trimming weight and adding power.
Here’s a few shots of the car as it stands:
The rear bodywork has had its cut lines inserted to allow for a section to be removable to give access to the mechanicals for servicing. The remainder of the middle bodywork seen will be bonded to the space frame.
We’re now in the process of creating ductwork to create airflow from the side intakes over the radiators and into the engine compartment. There’s a video walk around of this below to show the progress in that department.
It’s all systems go now on the development of the front and cabin sections of the car now. We’ve sourced a Porsche Boxster donor car, and the process of transferring the components we need from it is also underway. More to follow soon!
March 25th, 2017 | by deltaautomotive
Work has been progressing at a steady pace on the Delta Ligero prototype, with Andrew at Tricky Performance Engineering honing in on the rear end of the car and concentrating on the radiator and exhaust systems. The main consideration for the radiator setup for the car was naturally primarily to provide an abundance of cooling capacity for whatever engine the Ligero ends up getting, with a little extra capacity to account for forced induction if we go down that path. A secondary consideration was the weight impact of the radiators and their full coolant load, with the goal of the system as low to the ground, and as close to the centre of the car as possible to minimise any potential impact on handling. After considering all of our options for single versus twin radiator systems, and various mounting positions, we went with a set of RX7 type radiators mounted one on either side of the car, just aft of the rear wheels. This position will allow optimal airflow to be ducted from the hip and shoulder air intakes of the car, through the radiators, and then out through the vents in the back panel. Once sourced, the radiators had to be modified somewhat to suit our needs, and all the piping in and out is custom.
The radiators fit snugly inside the rear wheel arch, in between the outer bodywork and the 45 litre aluminium fuel tanks on either side.
From the rear of the engine bay looking forward the view looks like this:
We’re expecting the exhaust cans to come back from the fabricator in the next week or so and their mounts are eagerly awaiting their arrival!
The mockup of the exhaust cans, as well as their dimensions drawn on the outside of the bodywork, can be seen below.
The plan will be for the car to head back to Joe Bradley Fibreglass once the exhaust cans are in place for the next phase of bodywork to complete the rear wheel arches and a duct system to feed the radiators and vent hot air out through the back of the car.
Thanks for looking! Until next time…