Tag Archives: ptu

Diff’s Hot, Take it Easy – Rear Differential Cooler R&D, Part 5: A Tale of Two Track Days Part 2

At first, admittedly, it didn’t look like we were flexing as hard as we could with the Focus RS. With our full PTU/RDU cooling kit installed, we extended the time on the track with all four wheels producing power by about three minutes. However, after some reassessment, Dan transplanted the PTU temperature sensor from the gear oil into the coolant stream, producing great prospects for a fully functioning AWD Ford Focus. Since it would be a while until we could take our RS to the track, we decided to reach out to a third-party tester known for thrashing their cars … Continue Reading ››

Diff’s Hot, Take it Easy – Rear Differential Cooler R&D, Part 4: A Tale of Two Track Days Part 1

The term “track day” around here is always surrounded with a certain level of enthusiasm. We’re all aware of the extra labor that goes into a trip to Raceway Park in Englishtown, NJ, but everyone involved is more than willing to pitch in for the chance to see our RS thrashed around the track. Think of it like one of those field trips you would take in middle school. Sure, there would be a test on everything seen that day, but that was a small price to pay for a day out of the classroom. After spending almost a week … Continue Reading ››

Mission In-Pipe-Sible – Intercooler Piping R&D, Part 3: The Hot Side

I’ve said it before and I’ll say it again: paying attention to details is a crucial part of life. Leading professionals are gurus at doing so in their respective fields. A good chef can wade through the already heavy seasoning in something like a gumbo and tell if there is too much or too little garlic by doing a simple taste test. A good fabricator can easily tell a MIG from a TIG weld by simply watching the arc on the metal (with the proper eyewear of course). And a good tuner can tell if something as elusive as timing … Continue Reading ››

Diff’s Hot, Take it Easy – Rear Differential Cooler R&D, Part 3: Track Prep

When you’re hurtling towards a concrete-walled turn at over 90 MPH, you’d better know that every nut and bolt in your car is torqued to spec.
Photo: Nick Thomas
We’ve all had to prepare for something before—a date, an interview, a test. It’s always a stressful experience. Now imagine you were about to go on a date with somebody you were pretty sure is trying to kill you. Or, imagine that your desk would be pushed off a 100ft cliff if you failed that test. Preparing for a track … Continue Reading ››

Diff’s Hot, Take it Easy – Rear Differential Cooler R&D, Part 2: The Master Plan

The mood for the past few days here at the Mishimoto office has been a little giddy.  Scrawled on our calendar in one of our project manager’s less than impeccable handwriting are the words “Focus RS track testing”.  There’s a lot of hard work being done, but underneath it all lies a childlike wonder for what’s going to happen in the next week. Top10_06_resized We’ve spent countless hours street testing over the past several weeks, trying to learn more about the relationship between the PTU, ECU, and RDU.  We’ve learned a lot from this … Continue Reading ››