SAI = Steering axis inclination
KPI = Kingpin Inclination
(same thing)
Saw this post on M3Post with PDFs suggesting SAI/KPI should be between 14.7º and 15.7º. Old post, though, and I can't find the original source to corroborate, so I'm trying to figure out if it's accurate.
BMW's documentation doesn't seem to say anything about SAI/KPI as far as I've seen. But I've also been looking at alignment sheet scans people have posted; not many list SAI/KPI, but when they do list it, it does tend to be between 14.7º and 15.7º. PITA to find one of those posts for stock suspension, though.
Anyone know the official number and have a source they can point to? Or, has anyone seen an alignment sheet for a completely stock suspension – no alignment pins pulled etc.?
KPI = Kingpin Inclination
(same thing)
Saw this post on M3Post with PDFs suggesting SAI/KPI should be between 14.7º and 15.7º. Old post, though, and I can't find the original source to corroborate, so I'm trying to figure out if it's accurate.
BMW's documentation doesn't seem to say anything about SAI/KPI as far as I've seen. But I've also been looking at alignment sheet scans people have posted; not many list SAI/KPI, but when they do list it, it does tend to be between 14.7º and 15.7º. PITA to find one of those posts for stock suspension, though.
Anyone know the official number and have a source they can point to? Or, has anyone seen an alignment sheet for a completely stock suspension – no alignment pins pulled etc.?
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