New Project - Tuning my 3.4L for POWER - Page 3 - 986 Forum - The Community for Porsche Boxster & Cayman Owners

j.fro · 06-12-2013, 05:24 AM

This is great info, but I am lost on one important bit...how are you getting the ECU to add/subtract fuel from the regular programming?

insite · 06-12-2013, 05:09 AM

so you will note some things. first and foremost, nearly EVERY RPM range for EVERY AFR i tried was worse than the stock program. second, there ARE some opportunities.

i struggled with this. i really didn't think that running AFR's in the low 11's would be optimal. in some cases, it is.

insite · 06-12-2013, 05:22 AM

even though i didn't make nearly the power i had hoped, i'm happy with the exercise. it helped me clear up my throttle issue & also showed me that the work i have done to the car has produced a well running machine.

at road atlanta the 1st and 2nd, the car was running really well. i also paid a lot of attention to WHERE the 996's & cayman s's could pull me. it's generally turn 7. turns out those cayman S's have a diff, and 996's have slick rear suspension. i think it comes down to grip & exit speed from turn 7. they get a jump on me going down the back straight & it feels like a power delta, but it's not.

insite · 06-12-2013, 05:27 AM

which leads me to another point: the AFC and the data logger are for sale. i smacked the wall at Road Atlanta in a torrential downpour. i am hocking some tidbits to fix the car & weld in a cage.

Topless · 06-12-2013, 06:28 AM

Quote:

Originally Posted by insite

which leads me to another point: the AFC and the data logger are for sale. i smacked the wall at Road Atlanta in a torrential downpour. i am hocking some tidbits to fix the car & weld in a cage.

Ouch! I hope you are ok Kevin.

As you know, once the car is turning much faster laps, bad things also happen much faster.

insite · 06-12-2013, 07:17 AM

Quote:

Originally Posted by Topless

Ouch! I hope you are ok Kevin.

As you know, once the car is turning much faster laps, bad things also happen much faster.

i'm good; thx. arm took a beating from the side airbag. i was going about 85 when i spun, but the hit to the wall was a glancing blow. still, the airbag went off and it hit me HARD. absolutely shocked and PISSED that these are in the car. i really think they do more harm than good in 99% of accidents.

car looks pretty good to me, but i haven't dug into it yet. snapped the subframe & a couple of control arms. only the driver's rear quarter panel shows damage. there COULD be a transmission issue; the left rear wheel hit the wall.

jaykay · 06-12-2013, 07:33 AM

Glad you are okay!

Yeah I wish that there was a way to disable the air bags for the track and then arm again ....or not

I wear an open face helmet with air bag in front so I don't get my head taken off...of course full face with no air bag is best

The Radium King · 06-12-2013, 08:20 AM

can't the pst2 or piwis disable airbags? turn them off for track, on for street.

thstone · 06-12-2013, 11:31 AM

First, glad that you're ok and hope the damage to the car is repairable. The BSR car that I'm building won't have any air bags (no need with racing seat, harness, HANS, helmet, and window net).

The Radium King · 06-15-2013, 07:37 AM

When I was looking to use a BMW Maf housing in my 3.2 I noticed that the BMW unit, while close, was 1/16" to 1/8" smaller than oem. That's up to 14% less air than the Maf thinks its getting. That may be a reason for the rich condition you are getting at open loop.