Ask the Radical Factory #6 – There’s a lot of conjecture around use of noise killing cans like Supertrapps, decibel devils, and so on. Some people say they are not good for prolonged use due to the back pressure, others say it’s fine but will cut power dramatically. Are they ok to use, and if so, for how long? Are there any you’ve tested out in the field which work, and could you recommend any? Thanks, Raj (@rojid)
Hi Raj Correct, there is a lot of conjecture around this subject and exhaust tuning in general. A common belief which is key to this subject is that some back pressure is a good thing and is required to make good low to mid-range torque, this is a fallacy. Think of the engine as an […]
Ask the Radical Factory Question #5 – Can the Radical version of the Aim SW4 steering wheel used on the SR10 be adapted for use on earlier SR3 and SR8 cars with the Life ECU?
To use the full capabilities of the SR10 steering wheel in and SR3 or SR8 would not be practical because significant rewiring would be required. However, the steering wheel can be hooked up and used as a dash by connecting the Can high, Can low, power, and ground. This will provide visibility of the items […]
Ask the Radical Factory Question #4 – Hello, I Have a new to me a 2009 sr3 (chassis #438). Two questions I have are where about in the setting range for the dampers is a good place to start for a high speed fairly smooth track (CTMP (Mosport) in Canada)? The dampers are the intrax racing with the single adjustment knob at the top car has medium Nik link bars front and rear. Second what set up difference change between the Michelin and Hankook radical tires? The car came with a set of each, and I am free to run either in the club racing that I am doing. cheers, Corey Bradburn
Hi Corey, as you know the optimal suspension setup is dependent on driver style, weather, and track conditions. The latest Radical SR3 Owner’s Manual (SR3 XXR) describes good Initial suspension set up for dry and wet conditions. These set-ups work well as a starting point for most drivers at most tracks, and the Radical Handling […]
Ask the Factory Question #3 – Buongiorno, I am writing from Italy and am the owner of two radicals. I would like to have information on the construction date of the SR4 031 and Prosport 066 chassis. Grazie, Giuseppe Bellini
Hi Giuseppe, your SR4 (chassis number 31) was built in December 2004 and is considered a 2005 model, and your Prosport (Chassis number 66) was built in early 2000, likely February.
Ask The Factory Question # 2 – I have a 2017 RXC Spyder with a Ford EcoBoost twin turbo engine and noticed that the water pump is starting to go out. Can the water pump be replaced without pulling the motor and drive line? Jeff P.
Hi Jeff, yes, the water pump on your car can be changed without removing the engine. Your local dealer will be able to supply you with the required parts.
Ask the Factory Q#1 – I am writing to you from Japan. I work in automotive maintenance. I am working on a Radical SR4 engine that will not start. The fuel pump and ignition coil are not working either. I want to check if the engine control module is working properly. Can I have a wiring diagram for the Radical SR4 (Chassis No: SR4 00082j) Best regards, Atsushi K.
A: Hi Atsushi, attached is a copy of the Wiring diagram that will help you with your car. The SR4 you are working on shares the same engine wiring harness as the SR3, so the attached SR3 wiring diagram should be very helpful in troubleshooting your issue. Additionally, plugging into the Life ECU and using […]