sw chip
 

Anyone with sw chip in ca. pass smog.
Thanks

I'm not 100% on this, but pretty sure at WOT (aka dyno chart) the ECU is in open loop. Fuel and timing values are just read off a chart per rpm. Theoretically is the easy part to do, just need good AFM values and a nice knock sensor.

Part throttle should be closed loop. This takes feedback from sensors. Not sure what the 3.2 has sensor wise, but at least the O2 sensor and air flow meter. There's where the work and details are, as you have to make a multi-dimensional map accounting for many variables. That's where things get a lot more complicated, difficult, and time consuming.

Part throttle stuff doesn't show up on a dyno chart, but it does show up every time you don't have your foot to the floor, which is honestly most of the time. WOT peak numbers make sales and grab headlines, but IMHO there's more value in the attention to details. Otherwise we'd all be pining over 707hp SRT Hellcat Challengers.

I drooled a little at that gorgeous piece.

Yeah, good point, I'm sure the dynos are WOT. Even still, the SW lines are much smoother than stock and other chips.

And wait: you're telling me even a small part of you doesn't fancy a Hellcat? I might go for the Charger myself...

Hellcats are badass, no doubt. But I see them more as a fake breasted porn star - would rather have for one crazy night than commit to an everyday relationship.

Haha, well said Matt. I just love a sleeper sedan, but would never trade my little 200hp 911 for anything.

Either my tuner sucked (which I know he doesn't!) or those are some pretty optimistic dyno numbers floating around unless they are BHP not WHP... My brand new balanced/blueprinted motor, custom EL headers, open pipes, with a custom burned chip I hit a high of 230 WHP on his (Behe Performance) dyno..

That chart shows BHP numbers, for sure.

Website faq says the mapping's unchanged at "low load" and chip's not recommended for ca emissions.

I don't understand the idle improvements being reported here.

quote:
we leave the low load fuel regions factory so that you will continue to enjoy factory fuel economy and emissions while putting around town, or cruising on the highway.
...
In a state such as California with very stringent emissions limits, although most cars pass emission testing without problem, swapping back to the stock chip and reinstalling the catalytic converter is recommended ...

I think the improved idle is due to the slightly advanced timing at idle..The factory (it has been a long time, so I may be wrong) was something like 5* ATDC..engine warm at about 900 rpm..no load.

The SW chip puts the timing up to about 5*BTDC, warm engine, 900 rpm, no load...The revised timing map helps smooth out idle and the transition to low load take off.

I've passed California smog every other year since '07. '88 3.2 with SW Chip, open air box, sport 1-out muffler. Love the smooth power.

I sold an 86 with a SW chip that passed no issues. The chip was set up for SSI + dansk 2+2 which were not sold with the car. Original exhaust and cat were reinstalled as was the airbox.

That was 2 years ago..

Steve wong
 

Thanks for input.i guess I have to order a custom 91 octane.have open air box and dansk 2 in 2 out sport. Thanks for help deciding chipping it.