They're track-car rates for sure. 18/10 draws complaints from about 1/2 of people for being too stiff for the street. I'd run 20/12 or maybe 20/14 for a 90% track 10% street car... 18/10 isn't bad IMHO, just firm with the right dampening
He wants to know a spring rate, which is in units of either kg (force) per mm, or lb (force) per inch. Mass and force are not the same, but that is a technicality outside the realm of this discussion. Anyway, if you don't want to use the conversion feature of the most prominent search engine...
I was hoping your displeasure with the spool was a tuning issue rather than a turbo issue as the SP61GT is a small to mid-sized turbo. With your fuel mods it is common to run too rich, but you're about normal. You could probably go a bit leaner, but without a way of monitoring knock I wouldn't...
Yeah, I believe Suprasport used Jim Jobe for their supplier, but Jeff might be able to step in.
The yoke is long enough to fully engage the bushing -- I'm just baffled that it has been so long and no one has noticed...
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