Turbo spool comparison
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When you say VTG package what are you referring to?
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^^^^ something not correct in that graph as stock VTGs on a 997.1 turbo spool and produce good torque from 1950rpm. A bigger wheel seems to move that out to 3000-4000 rpm ish
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Dyno's should be taken with a grain of salt, every dyno operator will load the cars differently. I can load my dyno so that gt35's spool at 2800rpm or stock turbos dont even hit full boost...
OP, it depends how accurate you're looking to be with these comparisons. Mustang dynos, such as the one with the graph above, are load bearing and can read very differently depending on their settings as well as gear used on the dyno. This experiment will be very hard to do accurately unless done in a controlled environment.
Dynojets being inertia based dynos don't vary nearly as much. If you guys will be doing this then my recommendation would be Dynojet boost graphs all done on the same octane, gear and tuning approach.
Even with all that we've seen threads like this explode with people coming in with their expert opinions and doubts and they rarely produce anything valuable at the end of the day. There are a number of other data points when it comes to turbos and spool is just one of them. What about backpressure, efficiency, transient response, reliability, just to name a few.
Dzenno@PTF
Last edited by proTUNING Freaks; Feb 11, 2016 at 07:51 AM.
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+1
OP, it depends how accurate you're looking to be with these comparisons. Mustang dynos, such as the one with the graph above, are load bearing and can read very differently depending on their settings as well as gear used on the dyno. This experiment will be very hard to do accurately unless done in a controlled environment.
Dynojets being inertia based dynos don't vary nearly as much. If you guys will be doing this then my recommendation would be Dynojet boost graphs all done on the same octane, gear and tuning approach.
Even with all that we've seen threads like this explode with people coming in with their expert opinions and doubts and they rarely produce anything valuable at the end of the day. There are a number of other data points when it comes to turbos and spool is just one of them. What about backpressure, efficiency, transient response, reliability, just to name a few.
Dzenno@PTF
OP, it depends how accurate you're looking to be with these comparisons. Mustang dynos, such as the one with the graph above, are load bearing and can read very differently depending on their settings as well as gear used on the dyno. This experiment will be very hard to do accurately unless done in a controlled environment.
Dynojets being inertia based dynos don't vary nearly as much. If you guys will be doing this then my recommendation would be Dynojet boost graphs all done on the same octane, gear and tuning approach.
Even with all that we've seen threads like this explode with people coming in with their expert opinions and doubts and they rarely produce anything valuable at the end of the day. There are a number of other data points when it comes to turbos and spool is just one of them. What about backpressure, efficiency, transient response, reliability, just to name a few.
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If you floor it from 2,000 rpm in 4th for instance,... you'll find that the boost really kicks in at about 3,300.
And it's pretty typical to do dyno pulls in 4th,... starting at about 2,000 rpm.
Last edited by Duckstu; Feb 11, 2016 at 08:02 PM.
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