Top or bottom mount
02-11-2010, 12:28 PM
#1
!!! NOT CONFIRMED !!!
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Top or bottom mount
After searching I couldn't come up with the reasons to go top or bottom mount. I assume top mount for larger framed turbos, and bottom mount it if you can. I could see charge piping, waste gate, and downpipe being factors as well. where would a gt28 frame sit the best.
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02-11-2010, 12:38 PM
#3
Cpt. Slow
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You've pretty much got it. Bottom mount has sucky access but the downpipe routing is much better for heat and flow reasons. Top mount is the opposite, easy to access turbo/dp flange and depening on your imtercooler routing easier charge pipes, but the dp needs to do a ~110* turn straight out of the turbo, right next to heater lines, brake lines, throttle cable, and ocasionally electrical bits.
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02-11-2010, 01:12 PM
#4
The joy of bottom mounts is that you can easily mount the turbo on the manifold before you mount the manifold in the car. If you dont do a v-band on the turbine exit the downpipe can be a bit tricky to get on. As curly said, downpipe routing is great coming out of a bottom mount downpipe. Keep in mind with bottom mounts you also need to deal with your mixing manifold but its not really all that difficult to be honest.
Side/top mount will leave you more room for your AC/PS bits if you have them. For a GT28 turbo i'd go bottom mount, but I could be biased =P
Side/top mount will leave you more room for your AC/PS bits if you have them. For a GT28 turbo i'd go bottom mount, but I could be biased =P
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