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Originally Posted by spdracerUT
I can tell you a lot of it has to do with clutch selection. The more aggressive the clutch engagement, the more likely you'll bust 3rd gear do to the greater shock loading.
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A couple of guys here locally have sheared 3rd gear multiple times by just rolling on the gas in 3rd. They run smaller turbos (T25's and T28's) and their dyno charts at 10+ psi show BIG TIME spikes in third (like +100-130 hp in the span of about 500 RPM). I've seen dyno charts with larger turbos showing much smoother power increases without spikes and those fellows don't seem to have tranny problems. I want to see if the trend is consistent with more folks to determine if it will be safe to run 12 psi on a small turbo given that I control the boost in 500 RPM increments to
hopefully prevent the spiking and thus hopefully prevent the shearing. Thoughts?
