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Old 05-09-2000, 10:05 PM   #1
Revision
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MY99 RS-RIP / MY95 MX-5

Question California Spec. Specs?

Anyone know what other differences there are in the California spec cars (MY99) vs non-California spec cars? I mean other than visually checking for the 2nd filter. Are there different tuning maps in the ECU? Does the Cali-spec car run leaner than non-Cali-spec?
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Old 05-10-2000, 09:26 AM   #2
8Complex

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To those who don't know, Revision has compared my MY00 RS to his MY99 RS and found that I have a good 10-20hp more (bdyno measured). Basically our cars are identical except for year and that his car is a California car.

Well... working for a big company that doens't care where you call on their phone bill is great.

I called about 10-15 dealerships in Cali. and a few in Nevada and spoke with service guys all around. Here is the general summary...

2 said there'd be no differences at all, a few said that since 1997 all the Subarus were 50-state cars (emissions the same for all 50 states). 1 mentioned that it could be the different fuel injection systems (I think they went to different injectors). One said that 1999 wasn't a 50-state car, but the power output was the same and that it should all be the same stuff. Several (around 4 or so) said that in California they may have different timing maps (reprogrammed the ECU) to have more advanced timing so that it's emissions would be lighter.

Personally I think that one might be the key, that they programmed the ECU with a different timing curve then the othre 49 states. Possibly this is done at the dealership when they are recieved (or at the loading docks before going to dealerships) but I haven't found anyone that knows.

Essentially, I'm really curious about that timing issue... I think the only way we can test for sure is if we switch out the ECU for another 99's ECU that is fine.

The only other thing I can think of is that possibly you have a sensor that is dirty or is dieing, maybe the O2 or the MAF. *shrug*
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Old 05-10-2000, 09:28 AM   #3
8Complex

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You know who might know the answer to this? Shiv.
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Old 05-10-2000, 09:35 AM   #4
rao
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It wouldn't be done at the dealer - The car has to be certified for sale in California and you wouldn't get certified if you could switch it to the 49 state configuration. Swapping an ecu in would be easy if we can find a 49 state 99, it only takes 5 minutes.
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Old 05-10-2000, 10:09 AM   #5
8Complex

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Wouldn't the replacement ECU have to be reset when installed, also? Maybe just the downtime between one car and another would be enough...
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Old 05-10-2000, 11:10 AM   #6
rao
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I wouldn't be concerned with resetting the ecu, but that has been beaten to death here a few times
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Old 05-10-2000, 02:43 PM   #7
shiv
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It's not ususual for CA cars to be down on HP compared to other 49 state cars. They often have different fuel and ingnition maps to comply with emission regs. Sometimes even come with an extra cat! In some cases, manufacturers will state the hp differences in the specs, e.g. 150hp/143hp(CA). But often, they don't say thing about it.

Any car that can gain 20% more wheel power through simple intake and exhaust mods has got to be seriously de-tuned. At least it keeps the performance aftermarket alive and kicking

shiv
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Old 05-10-2000, 05:04 PM   #8
8Complex

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Shiv - Yeah too bad that you have to sacrafice MAF's for an intake and it's power, though.
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Old 05-10-2000, 05:58 PM   #9
Revision
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Part of that HP loss can be attributed to the 2nd air filter. But there has to be something more.. Every single MY00 here in the Chicagoland area I've observed have light white smoke puffing from the exhaust (running rich?) while MY99 has no such tell-tale signs.

So, Shiv how is that Tek II working along?
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Old 05-10-2000, 06:29 PM   #10
shiv
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The TEC-II kits have finished the developement process. I ordered the raw parts for my first production kit today. When it arrives next week, it will be installed in Imprezer's n/a MY99 for n/a testing/mapping. After that, it's officially available. Sorry for the delay-- Rim of the World has set me back a couple of weeks.

The turbo-specific TEC-II kit has finished the testing/mapping process as well. It has passed the torture and altitude tests with flying colors. The kit includes big injectors, boost control, knock sensing, NOS-triggered ignition retard, etc. More on that later.

Shiv
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Old 05-10-2000, 10:41 PM   #11
8Complex

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Hey, I'd let Rim of the World set me back a few weeks too... That looked like it'd be fun as hell!
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