Homemade turbo up and running on the rex runs great have a quick question on turbo timer. Is the rpm signal on a crx 5v or is it 12 volt also is it a digital signal just need to know b4 i install. If it is a 12v i need to buy a conversion harness from hks. As the type of turbo timer it is . Yes it is a hks type 1. Any info on what the volt signal is or if it is not digital would help me out alot. Sitting out in 104 degree weather with no ac waiting for you car to cool down is not a good time.