Clark Darrah

@davidf, Sorry to hear about this, but on the bright side, thank you for pushing the limit to find where it is. Hopefully many people will benefit from your experiment. And hopefully it just ends up...

@davidf so sorry to hear of your misfortune :-(. It sounds like the primary oil pump blade has possibly broken off the shaft that drives the scavenge pump. In my experience this could be from debris ...

I called the Radical engine department in the UK, and I was able to talk to I think the lead engine rebuilder as well as another engine tech. They both confirmed that the refresh schedule for the 150...

Thanks Dan and Charley for the input. I have sent an email to Spring Mountain for clarification, and I will likely send another to the factory. It would be useful to hear what they have to say, alth...

Performance Comparison The SR3 is a popular HPDE track day car and race car for several reasons. It has high downforce, is light weight, paddle shift, and has superb performance for the total cost ...

I think I and others may have posted some info about run time versus load time for engine and GDU refresh for 1500cc SR3, as well as what to use in terms of the lifing of components. I want to set th...

G'day All, I've just completed my first SR3 driveshaft rebuild according to the schedule... done at around 12 hours on my HD driveshafts (on-track time) rather than the 10 hours Radical recommend. Li...

Flying lap from yesterday at NJMP on lightning. Not part of a race event so with it unofficially broke the all time NASA track record and SCCA P2 track record

On Matt's recommendation, I called Sabian at AIM and he had a simple answer:" looks like you may be using the wrong software, try RaceStudio3" which I did and all issues disappeared.

Hi Rod, On my SR3 XX, I had one bad wire after just 25 hours run time. The metal circular conductor that attaches to the coil or the plug (cannot remember which) had broken in half, so it did not mak...

Hi All, Just thought I would share some recent experience with my RSX's Spark Plug Leads. I had just done an oil change and was removing the spark plugs to allow the engine to crank over without too ...

yeh i'm always frustrated 😀 - it's basically because i have to treat these final few hours of the day like qualifying runs; the problem is our cars are 10-25 seconds quicker than pretty much e...

well, first time back on track in 2023 - a perfect day. Setup honed a little more, a shorter ratio (1 lower than factory standard), newer pads, and a lot more confidence to attack. Ended up doing 82 l...

@rojid, I know what you mean, I put my camera microphone far away enough so it can’t record my swearing when I make a mistake. 🤣🤣🤣

Hi All, Just a bit more of an update on this topic.. I feel like I'm starting to understand what's required here. I now own three of these GDU's (one in the older RSX I have, a brand new one in the XX...