Daily Archives: May 6, 2017

It’s ‘Dega baby!

Just finished watching the Xfinity race from Talladega. There were lots of wrecks but not while I was watching. I kept coming back to the aftermaths instead of the actual wrecks. I don’t like wrecks, I hate seeing good race cars torn up, I’m also not very happy about seeing crappy race cars torn up. I mean sure I am less unhappy about crappy cars getting torn up, but at the Xfinity and Monster Energy Cup levels there really are no “crappy” cars, just “less perfect” cars that could run just as fast with a few adjustments. Part of that is rules, part is the teams are just that good.

Watching the Xfinity and Cup Series is part of my inspiration for both the Sprint-T and the Mid-Bucket. Also I watch YouTube videos of Goodguys Autocrosses from recent years and SCCA Solo events that have Modified category cars for when I run slicks. Speaking of slicks, I just can’t find 16 X 12 wheels in my bolt circle at a reasonable price, so that means the 6″ Formula Vee rears on the front on the 4″ wide wheels, and the 12″ wide tires on 10″ wheels on the back.

And now the ARCA cars are about to run (on the tube at least, I don’t know if this is live or tape-delayed) and in about an hour is the IMSA race from COTA outside Austin. So then I start flipping back and forth. And I won’t have the split attention that will let me write and watch 2 races at the same time so I’ll go ahead and end this post.

Dangit, that won’t work!

Remember when I was writing about lightening the power steering rack and pinion out of the minivan to take more weight out of the car? Well it turns out if I do that I won’t have power steering any more. Allow me to present a couple of images I found when trying to find dimensions of the rack.

The power servo is part of the rack instead of on the input shaft like on a PS box.

And this one off an actual 1996 Chrysler minivan.

Not much room to be cutting stuff off on that one!

So, minor change of plans. Since the hydraulic servo is part of the rack and there isn’t enough room to remove anything without destroying the servo, I’ll just be removing whatever still sticks out of the right side of the rack at full right lock (rack all the way to the left, turning the wheels to the right) and then sealing the end of the rack like before. The drag link will go on the left side of the rack so the axle will have less side-to-side motion as it travels. I mean sure I could run the drag link off the right side but that would require a very short drag link, which in turn would require a very short panhard rod to prevent bump steer from the steering. But this would then cause another form of bump steer as the short panhard rod moved the axle side to side on the 4 bar links. There are just so many sources of bump steer that the best you can do is eliminate the worst and minimize the rest of them as best you can. And in this case the biggest can be eliminated by making the panhard rod the same length and angle to the axle as the drag link, with most of the rest minimized by making the panhard rod (and thereby the drag link) as long as possible and as close to level as possible. And yes after considering the clearances involved the drag link is going top of the stack on the steering arm. That way I don’t need to worry about the tie-rod hitting anything like the gas tank or the steering rack.

And that cerveza? Bien. Even without the lime.

Opus the Unkillable