What are the rev limits set at, and are there any drawbacks to changing it?
For the 964s and 993s, the rev limit is kept stock at 6800 RPM, where we believe is the proper limit for an internally stock motor. For the 3.2 Carreras, the rev limiter is revised by about 240 rpm, from the stock 6520 limit to about 6760. Raising the limits higher than this are only by special request, and recommended only concurrently with internal modifications that properly support the higher limits. Raising the rev limiter does not change the power curve or increase the peak hp of a motor as maximum power on most 911 motors are achieved around 6000 rpm. For the 3.2s however while the hp of the stock chip falls considerably after 5900 rpm, the power curve of the revised chip provides usable hp that extends considerably past this point with typically a new hp peak at 6200 with a 16 hp gain and often a 25-35 hp gain at 6500 rpm. The car will seemingly pull nonstop to the rev limit while the stock chip just runs out of steam. This may be of benefit to those who track their vehicles an
