| This is an engine dyno chart from a 1997 993tt with our Stage 3 conversion. It's based on a 1997 993tt engine, with increased displacement to 3.8l using factory Mahle p/c's. GT2 Evo cams are run with our pressure sensing 1995 993na Motronics unit for a speed density type system. We've run higher powers than this on many installations, however, the horsepower produced at merely 1.14 bar of boost is spectacular! Protomotive's equal length headers, muffler, intercooler and plumbing are used for the turbosystem. This dyno run was at 600rpm's/sec, or similar to a 2nd gear run in some cars. Quite quick. Steady state boost comes in lower, at approx. 3900 rpm's. |
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| 2001 996TT engine: 3.6L, stock compression ratio and camshafts, port and valve work, Protomotive headers, Protomotive Intercoolers, Protomotive Exhaust system, Protomotive Air Intake system, large throttle body, high flow fuel injectors, Twin-ball bearing Garrett turbo's, dual 44mm wastegates. |
Ok... Check out these numbers...
You'll notice that the efficiency of the engine just kept improving as the boost pressure increased. This is partly due to the turbo's coming into their peak efficiency islands. The best we had seen previously on an aircooled was about 327 on 3.8l vs. 3.6l on this engine. So why are others needing so much boost to get the power out of these 996tt engines? Efficiency... Small turbines, inadequate intercooling, poorly designed intake plumbing, exhaust backpressure, etc. etc. etc. With a properly designed SYSTEM, not just bolt-on components, it's amazing what's possible. |
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