John Parsons

I think the Radical community could really benefit from some additional suppliers in the mix. I doubt Radical feel that way though. 🙂

Thanks Charley. I'll keep the updates coming. Summing up progress and photographing things as I go helps keep me organized and focused. 🙂

With the vacuum manifold and vacuum port problem solved, I've moved on to how the actuator will work. I found a sweet 8mm ID CNC router coupler that allows the actuator to directly drive the throttle ...

Last night's project was the vacuum manifold. Each of the just created throttle body vacuum ports will be connected to the manifold. There are two additional ports: one goes to the MAP sensor (the who...

I would if they had an SR8 part I need. My 'glass panels are showing their age.

Last summer I refreshed my gearbox, and Radical sent me a new layshaft and first gear, and invited me to visit the factory when I visited London the next month. The parts didn't fit, and so I took the...

Thanks Nikki. That's great to hear about Radical helping get your devices integrated. I really think my case of the old ECU and older GCU was just too hard -- or perhaps they thought I couldn't do t...

One of the first sub-tasks is to modify the throttle bodies to support a MAP (manifold absolute pressure, aka vacuum) sensor. There are no provisions for a vacuum port anywhere on them. Jenvey (the OE...

I'm upgrading my SR8 to a MoTeC M150 GPRP (general purpose racing paddle shift) controller. I found that the gearbox controller (by Geartronics) was so old that the tuning software didn't work, and th...

Graeme, your story sounds like mine, and, I suspect, like a lot of Radical owners. My interests came via old muscle cars to Corvettes, to a track-only Z06 'Vette. I too got tired of fixing things like...

Hello all. Thanks Charley! I've been wondering why there wasn't a dedicated Radical forum! My (current) Radical is a 2007 SR8, which I've been working on and (rarely) driving for the past 2 years. I'v...

Radical is now selling one piece wheels that are much more reasonable than the original 3 piece design. I bought new ones from Spring Mountain for $2500 for a set. I'm a Forgeline dealer, and I spok...