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2005 Lotus Elise 8,xxx miles
Blackwatch supercharger install 250 miles ago
5,600 ft above sea level Boulder, Colorado
The problem: I took the car to the dyno (dyno dynamics) along with 4 other supercharges Elises and found out that my car is boosting below all the others with the same SC setups and is fueling very rich.
I was able to test the system with a smoke machine and did not find any visible intake manifold leaks. While “pressurizing” the system smoke eventually came out the intake, I removed the flexible line to the throttle body and plugged the TB with a cap and the system held pressure until the smoke generator could not pressurize any further.
The max boost I was able to achieve was ~5.7psi and the others were around ~7.
Peak HP was at 173 with the others at 204.
Sheet one: 3 runs, all my car (run 15 was stopped mid run I think the O2 sensor fell out and should be disregarded)
Sheet two: My car plotted against the other 2 BWR cars (2006 Elise / 2006 Exige)that were dynoed that day
Sheet three: My 3 HP / Torque graphs from the day
The AFRs eventually got so low the dyno couldn’t log them (it stopped at 10) but on the handheld they went to about 9.6.
Based on the AFRs I’m guessing the supercharger is moving the air past the MAF which explains the low AFRs . I think I’ve ruled out an intake manifold leak with the smoke tester. So where’s the boost going. I have a theory but I’d like to get other’s opinions before I bias the group with my opinion.
Blackwatch supercharger install 250 miles ago
5,600 ft above sea level Boulder, Colorado
The problem: I took the car to the dyno (dyno dynamics) along with 4 other supercharges Elises and found out that my car is boosting below all the others with the same SC setups and is fueling very rich.
I was able to test the system with a smoke machine and did not find any visible intake manifold leaks. While “pressurizing” the system smoke eventually came out the intake, I removed the flexible line to the throttle body and plugged the TB with a cap and the system held pressure until the smoke generator could not pressurize any further.
The max boost I was able to achieve was ~5.7psi and the others were around ~7.
Peak HP was at 173 with the others at 204.
Sheet one: 3 runs, all my car (run 15 was stopped mid run I think the O2 sensor fell out and should be disregarded)
Sheet two: My car plotted against the other 2 BWR cars (2006 Elise / 2006 Exige)that were dynoed that day
Sheet three: My 3 HP / Torque graphs from the day
The AFRs eventually got so low the dyno couldn’t log them (it stopped at 10) but on the handheld they went to about 9.6.
Based on the AFRs I’m guessing the supercharger is moving the air past the MAF which explains the low AFRs . I think I’ve ruled out an intake manifold leak with the smoke tester. So where’s the boost going. I have a theory but I’d like to get other’s opinions before I bias the group with my opinion.
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