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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,742
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I agree with most of the folks here that EFI really isn't worth the added expense over CIS, but if you love working on engines it's the cat's meow . It's so cool to be able to bring up data or make fuel and ignition changes with a keystroke.

As Don mentioned, it's a bear to get it balanced for on/off boost, cold start, part throttle, etc. But when it works, it's like magic. My tuner finished most of the dyno tuning on Friday and I've been tuning from data logging since then and now it's running great. I still have to do more tuning especially while someone's driving, but I sure like it so far.

I just checked and my mileage over the last few days has been 12.5 mpg and that includes quite a bit of dyno time. I've also found some very rich area when cruising at part throttle, so there's better mileage to come.
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2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)

Last edited by David; 07-15-2007 at 05:02 PM..
Old 07-15-2007, 05:00 PM
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