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·My original plan was to go with something along the lines of a SP63 or similar size simply because it has been widely accepted and tested as a great turbo choice for an Auto Supra. After talking with Larry on a few occasions and seeing the latest dyno results from Al’s car, I decided (more like was convinced) to be a little different and go with something a little bigger, namely the SP70 (.81). I could not be happier with my decision.
The general consensus has been that Auto’s tend to suffer from too much lag, even with a high stall, and that going big would result in an overly laggy turbo car, especially for the street. The general consensus could not be more wrong when it comes to the SP70. This turbo is absolutely AMAZING. From a dead stop this turbo is building boost somewhere around 3600rpm (As a side note, high stall converters really work wonders for spooling turbos in an Auto.) By the time my converter slips completely the tires are roasting with NO lag time. The best part is it looks to be hitting full boost (1.55 kg or 22psi thus far) in the neighborhood of 4500-4800 rpm in 1st gear, which is very impressive for a turbo with a 70mm compressor wheel and .81 A/R housing. Obviously top-end power for a turbo this size is going to be stellar, but it’s the quick spool that has been the most impressive thus far.
The car has been baseline dyno tuned by Chris at PM to get in the neighborhood of 11.5-11.8 A/F ratio. I’ll put some 104 octane in it, and put it back on the dyno this weekend to fine tune it at around 30 psi. I’ll post the numbers when I get them.
Special thanks to Phil Panas for his continual help, and making sure I had everything I needed and on time, Larry and Sound Performance for creating and designing a great turbo kit and fuel system, and delivering it on very short notice, and Chris Johnson @ Performance Motorsports for his great attention to detail and impeccable work while installing the kit. Thanks for everything guys.
The general consensus has been that Auto’s tend to suffer from too much lag, even with a high stall, and that going big would result in an overly laggy turbo car, especially for the street. The general consensus could not be more wrong when it comes to the SP70. This turbo is absolutely AMAZING. From a dead stop this turbo is building boost somewhere around 3600rpm (As a side note, high stall converters really work wonders for spooling turbos in an Auto.) By the time my converter slips completely the tires are roasting with NO lag time. The best part is it looks to be hitting full boost (1.55 kg or 22psi thus far) in the neighborhood of 4500-4800 rpm in 1st gear, which is very impressive for a turbo with a 70mm compressor wheel and .81 A/R housing. Obviously top-end power for a turbo this size is going to be stellar, but it’s the quick spool that has been the most impressive thus far.
The car has been baseline dyno tuned by Chris at PM to get in the neighborhood of 11.5-11.8 A/F ratio. I’ll put some 104 octane in it, and put it back on the dyno this weekend to fine tune it at around 30 psi. I’ll post the numbers when I get them.
Special thanks to Phil Panas for his continual help, and making sure I had everything I needed and on time, Larry and Sound Performance for creating and designing a great turbo kit and fuel system, and delivering it on very short notice, and Chris Johnson @ Performance Motorsports for his great attention to detail and impeccable work while installing the kit. Thanks for everything guys.
. Oh well, I could maybe go for a ride some other time
