Beta cars needed for Autospeed Performance supercharger.
02-12-2009, 10:27 AM
#42
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Here's the reasoning behind it.
If the charge temp is cooler than with the roots and there's less chance of detonation and the 10.5 psi is well within the operating range of the compressor then there's no downside.
The way a centrifugal functions makes more boost less of a concern for a stock bottom end, as long as it's cooled properly. The good thing about a roots style setup is also a bad thing... It makes big torque at low rpms which means that it's increasing cylinder pressure where your engine is already seeing its highest cylinder pressure. Boost MUST be kept low on a stock, high compression motor because too much of an increase in cylinder pressure without higher octane and better cooling means you detonate and/or fold rods. The centrifugal makes power with rpm as cylinder pressure is dropping, so you can typically run a bit more boost safely. Add to that the more effective cooling made possible by the separate intercooler. Also, the engine isn't seeing 10.5 psi after going through the intercooler.
The way a centrifugal functions makes more boost less of a concern for a stock bottom end, as long as it's cooled properly. The good thing about a roots style setup is also a bad thing... It makes big torque at low rpms which means that it's increasing cylinder pressure where your engine is already seeing its highest cylinder pressure. Boost MUST be kept low on a stock, high compression motor because too much of an increase in cylinder pressure without higher octane and better cooling means you detonate and/or fold rods. The centrifugal makes power with rpm as cylinder pressure is dropping, so you can typically run a bit more boost safely. Add to that the more effective cooling made possible by the separate intercooler. Also, the engine isn't seeing 10.5 psi after going through the intercooler.
02-12-2009, 10:29 AM
#43
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This thread was to put out a feeler for those who would *consider* being a beta owner.
All of the details of the beta program are being put together now. Once the details are finished it will be provided to those showing preliminary interest.
02-12-2009, 12:53 PM
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And how is it that your are assuming that IATs are lower with the ASP setup over VF?
It's not as simple as roots vs centrifugal. And you statements don't take into account charge cooling. If all your posts are to sell ASP kits then I suggest you focus on that and providing data from that kit instead of trying to slam the competition which you clearly know little to nothing about.
If you want to discuss the differences between the kits then please bring some data to the table. Otherwise all your posts just seem to be baseless slander.
To be clear I am all for the ASP kit being released even though I am a beta tester for VF. The more competition the better. I am an enthusiast not a vendor after all. However ASP seems to have a hardon for the VF kit, which is understandable as it's their competition, but beat VF with data not with childish bs.
If you want to discuss the differences between the kits then please bring some data to the table. Otherwise all your posts just seem to be baseless slander.
To be clear I am all for the ASP kit being released even though I am a beta tester for VF. The more competition the better. I am an enthusiast not a vendor after all. However ASP seems to have a hardon for the VF kit, which is understandable as it's their competition, but beat VF with data not with childish bs.
