Quote:
Originally Posted by 911st
First, SW makes a great proven chip. It is backed by many, many dyno runs and other concrete inputs. He dose increase low end drivability to a significant extent but he dose not seem to take unnecessary risks in terms of how close he is willing to run near the edge. However, under his "custom chip" option that mightt be a different story.
Now, there is performance potential advantage with tuning a motor to run on 91 obtain compared to with race fuel. How much more, using SW's numbers one mightt say that on a full on 3.2 that has been blueprinted and is running a full race exhaust peak HP mightt go from 260 to 270hp using factory equivalent HP rating.
However, on a street build with loud but lesser developed exhaust it might be something like 5 hp.
Note that past about 5k rpm the 3.2 Motronics can no longer sense variations in air flow. Thus all chips are only going to be able to send a fixed amount of fuel at each WOT rpm point. Thus, if you are flowing different numbers from the chip tuners expectation, your AFR's will be different than expected.
I like the 911CHIPS.com "custom chip" option for this reason. He re-tunes the chip based on the results of your dyno AFR numbers.
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I'm glad someone made this point. This is what separates a real chip tuner from an 'off the shelf' chip provider. Tuners can read your dyno charts, data logs and provide the optimum tune.
Having started in the turbo world years ago, I currently have 90 something versions for various configurations as the turbo guys do some radical things to their cars. So nearly every turbo chip is a custom chip. In contrast, custom tuning a normally aspirated car is pretty easy.
Currently there are over 800 turbo cars running my products, and my product base is constantly growing. The newest editions in the coming months will be the 968, 964, 993, and eventually I'm going to develop a turbo kit for the 3.2L 911.
Regards,
Russell