This is why you do not throw a bunch of mods on without a tune...

[Blueline Tuning]

I tuned an 03 WRX a few monthis ago and always pull a Learning View shot before flashing a new map, so I know how the car has been running. This person installed the following the day before and has been driving around:

New catless up pipe
Full turbo back catless exhaust
CAI

Here is his learning view. Keep in mind, the older 16bit Subaru's are suppose to have an IAM of 16...

His car was not happy...

[knucklesplitter]

I have seen learning views like that on 100%-stock cars with no mechanical issues. Mostly STI's, but also a Forester XT the other day.

[Blueline Tuning]

The biggest problem is how much his IAM dropped. On the 32 bit ecu's, they should be at 1.0 (FXT, STI, LGT 06+ WRX)
His should have been at 16...plus that was only a day of driving with those mods. It was really bad really fast. Also, he's running very lean above 50g/s AFR. When I verified his actual open loop AFR's, with my wideband, if was more lean and needed his maf adjusted a decent amount.

Also the high RPM fine learned knock is not good. He also had a lot of feedback knock, which isn't shown.

[knucklesplitter]

Originally Posted by Blueline Tuning

The biggest problem is how much his IAM dropped. On the 32 bit ecu's, they should be at 1.0 (FXT, STI, LGT 06+ WRX)
His should have been at 16...plus that was only a day of driving with those mods. It was really bad really fast. Also, he's running very lean above 50g/s AFR. When I verified his actual open loop AFR's, with my wideband, if was more lean and needed his maf adjusted a decent amount.

Also the high RPM fine learned knock is not good. He also had a lot of feedback knock, which isn't shown.

That stock FXT the other day had IAM = .625, and I see that on stock STI's too, even as low as .500. Hurray for CA 91 octane.

Which CAI was it? Most of them are designed oversize to lean it out on purpose

[Blueline Tuning]

Originally Posted by knucklesplitter

That stock FXT the other day had IAM = .625, and I see that on stock STI's too, even as low as .500. Hurray for CA 91 octane.

Which CAI was it? Most of them are designed oversize to lean it out on purpose

Wow, yeah +1 for our awesome gas. I can't remember the brand, honestly, but he had removed his heat shield, had no box and had it pointed right at his turbo... His IAT's were in the 140 range...I tried to explain why that wasn't the best set up, but...he was set on the "cool sound"

[A1337STI]

LoL too funny! wonder what my STI was doing back when i ran a short ram (that was my only mod, and i heat shielded the crap out of it) actually got the cone filter down to 75 on a 73 day as long as i was driving at least 15. only went up to 80 ish when parked with a hot motor.

[silversuby]

Sorry for changing the topic, and hopefully this isnt a silly question but about how long/far could you go without a tune safely. What I'm getting at is that I bought some parts that were for sale cheap on nasioc a couple of months ago and am getting ready to put them on. I will be putting on a vf-39, sti "pinks" fuel injectors, and an sti tmic. I want to install them myself and if I drove it conservatively would it be alright to limp it the two or three miles from where I would do the work to the shop to get a tune?

[Dean]

Originally Posted by silversuby

Sorry for changing the topic, and hopefully this isnt a silly question but about how long/far could you go without a tune safely. What I'm getting at is that I bought some parts that were for sale cheap on nasioc a couple of months ago and am getting ready to put them on. I will be putting on a vf-39, sti "pinks" fuel injectors, and an sti tmic. I want to install them myself and if I drove it conservatively would it be alright to limp it the two or three miles from where I would do the work to the shop to get a tune?

IMHO, you should not drive with any injector change, even if the car will start/run. Turbo you can limp along by running wastegate boost. TMIC is not a huge deal.

[Blueline Tuning]

Originally Posted by Dean

IMHO, you should not drive with any injector change, even if the car will start/run. Turbo you can limp along by running wastegate boost. TMIC is not a huge deal.

Yes, you may run into problems with the injectors scaling/latency, since your stock injectors are 420cc rated. It would be best to have a tune set up and ready to flash before trying to run your car with an injector swap. I also hope you have a 255 fuel pump as the stock bug eye's isn't the best for bigger injectors.

*Side note - the latency is the same on the "Pinks" as the 420cc stock wrx injectors, but you'll still need to change the flow scaling and use a WBo2 reader to verify your AFR numbers in open loop fueling

[sperry]

Originally Posted by silversuby

Sorry for changing the topic, and hopefully this isnt a silly question but about how long/far could you go without a tune safely. What I'm getting at is that I bought some parts that were for sale cheap on nasioc a couple of months ago and am getting ready to put them on. I will be putting on a vf-39, sti "pinks" fuel injectors, and an sti tmic. I want to install them myself and if I drove it conservatively would it be alright to limp it the two or three miles from where I would do the work to the shop to get a tune?

You should be able to get an off-the-shelf open source map for those mods pretty easily since that's a very common setup for a WRX. That will get you to the shop no sweat.

[Kevin M]

Originally Posted by sperry

You should be able to get an off-the-shelf open source map for those mods pretty easily since that's a very common setup for a WRX. That will get you to the shop no sweat.

This. You should absolutely positively NEVER drive a car with injectors or turbo not accounted for via EM, but in this case it's an easy fix.

[Dean]

You guys are assuming he has some way to get this "off the shelf map" onto the car which is not too likely considering he did not know the answer or talk about maps in any way.

[Blueline Tuning]

Originally Posted by Dean

You guys are assuming he has some way to get this "off the shelf map" onto the car which is not too likely considering he did not know the answer or talk about maps in any way.

This is what I was thinking... Without a cable/laptop you are out of luck. If you live a few miles from your tuner, they should be able to come to you and flash a "safe" base map to get you to the shop.

[cody]

Where there's a will, there's a way.

[A1337STI]

tow truck? flat bed? tripple A ? road side? i think your CEL is enough to kick in the "we tow you to a shop" clause ... but check your fine print n stuff.

[silversuby]

Okay. Thanks for the info.

[renosubby]

I want to point out that this technically isn't that bad. Stock tunes are setup to start at a IAM of 8 so I understnad its knocking but its not like its much worse then stock. Also Im not stating he doesn't need a tune either.

Just my .02

[Kevin M]

Yeah, a mild vacuum leak (this is before that line totally fell off Cory! ) made mine look worse than that. Plus with a 4EAT, you can get roughly half that much activity from shift knock.