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Interesting piece in NYT today: https://www.nytimes.com/2021/07/15/business/chevrolet-bolts-ev-fire-recall.html?action=click&module=In%20Other%20News&pgtype=Homepage

Totally with you on this Howard. My son works in a government safety lab and his group is tasked specifically with testing the combustibility of all types of batteries for EVs. When an individual cell ignites, it goes off like a blow torch, and the chain reaction when the cells are in close...

No Dave, I don't think you are over thinking it. I've always had the same problem with the inch/mm measurements for the reasons you say. My alignment shop uses angle change, and when I built my toe gauge, I designed it to work on my brake discs (just over 11" in dia). The run-out on the discs...

Dave, re your previous question; whether its better to have small amount of bump toe-in or bump toe-out, I can only answer from my own experience. I got the front static toe-in adjusted to 0.34deg overall (0.17deg per side). It turned out that the minimum toe change I could achieve from...

Dave, to answer your last post first, I went through this same issue re front castor. I have a different front-end geometry but believe the issues are the same. I originally set up the front castor for about 3 degrees but noticed that the self-centering on the steering was very weak. I...

Thanks Howard for adding this reference into the discussion. Any discussion on GTD rear bump steer should start with this info. I had assumed that the mods that you and Dereck Bell describe well had already been carried out on Dave's GTD but shouldn't have made that assumption without...

I plotted from from about +2.5" to -2.5" around ride height. I seem to remember the measurement curves weren't completely smooth but the larger range of measurements gave a slightly better sense of which way to move the rack vertically. The front end was set with slight static toe-in and I...

If you are experiencing some bump steer when driving, it might be worth checking the amount that's occurring, before you make a fixed block. Bump steer gauges are widely available or can be made fairly easily. In basic terms, you want to minimize the change of toe in/out over the range of...

Freudian slip?

OK, no problem. I assumed it was but couldn't tell from the views in the attachment

Just looking at your rear suspension geometry (first 2 attachments in your last post), I was trying to figure out how your arrange for mounting the bottom of the rear shock works. Is it a type of U-shaped bracket that is jointed at both ends (lower control arm and lower shock mounting)? Or is...

Had my first jab yesterday (Pfizer). Went to one of the Ottawa mass vaccination centres. Really well organized, I was in and vaccinated in less than 10 minutes. Only symptom was slight soreness at injection location.

The report in question seems to raise more questions than it answers. It doesn't help that there are several versions in the media all with slightly differing descriptions. The most self-consistent seems to be in the Times of Israel (and the only one to quote the doctor directly in charge of...

Yes but it's impact on the CoG location must be multiplied by it's own CoG location distance from the mass centroid; i.e. a 17kg that is 70cm above the centroid will have 10 times the impact of a mass that's 7cm above the mass centroid.

Yes, the construction of my chassis is somewhat different to yours, monocoque central tub with low mounted front and rear subframes, and no roll cage. I would think that the roll cage could easily add 5cm or more to the front CoG vertical location

Obviously, it depends on many things, including placement of main components, ride height, etc, but for my specific case; 4.5 inch front ride height and 5 in rear ride height with bottom of engine sump in line with plane of chassis bottom (no dry sump) then front CoG...

Sunbeam harrington?

OK here but just found out this morning that a colleague and friend of mine for over 10 years passed away from covid last week. A real shock

..an olive green 1965 1275 Cooper S similar to this one, except it was not anywhere near the pristine appearance of this car. Fitted a Shadbolt cam (bad idea), and LCB exhaust, ported and polished the head. Remember replacing the CV joints wasn't a lot of fun and the clutch seemed to forever...

Before I get shouted at by everyone on here, I realize the demo in the link is not very meaningful as there is a lot of info missing and what is being measured doesn't really address the suitability due to impact. A deeper discussion/analysis is required. However considering some of the...