OMG VTEC

Not sure how much a tiny intercooler has to do with the car blowing up after a few runs, but most 12 second WRXes are running an STi intercooler or a FMIC.

w00t692

^^ there we go.

And if you don't know what it has to do with blowing up the car you don't know anything about turbocharged cars?

intake air temperatures cause detonation if your'e pushing a turbo past it's efficiency limits the temperatures will skyrocket.

OMG VTEC

Pretending to be an expert again? Yes, high IATs can contribute to detonation. But there is a lot more information you need before making such a statement.


What's the efficiency range of a TD04-13T? What, you don't know because you have almost no real experience with WRXes? Who says you have to push it out of its efficiency range to run 12s in the 1/4 mile? You wouldn't know either way, as you just make comments on a whim without any experience to back it up. The stock WRX TMIC is a lot better than you think it is and, like I stated earlier, a lot of these cars aren't running it. Most of the stock turbo cars putting these times down are running 18psi and tapering to 16psi and lower as redline approaches. You can push the limits of the engine and stock turbo with a good tune.

These cars aren't detonating, you're making that up out of thin air without any examples or experience.

Angerman

You two

w00t692

http://img280.imageshack.us/f/13tcompressormapsn2.jpg/

Compressor map. I can't do the math to map a run of the engine through it because i don't have a datalog to provide me with this useful information, but there is no way from looking at it, that that turbo can support more than 15 psi past about 5000-5500 rpms. Anything past there is going to be tapered lower than 10 psi.

This is assuming a 2.5L engine.

tapering 16 psi up top would result in the turbo going below 50% efficiency, turning into a blowdryer.

I'm just callin it like i see it.

but i can believe that a WRX would run 12's on the stock turbo given the right conditions.

Although i highly doubt it was common.

Just like the guy in his bone stock 09 running a 12.9 trapping 104. He's a very good driver, and that won't happen often.

i've seen an 08 wrx with a vf39 turbo tuned to around 330 whp run 12.9 @ 108 mph w/ a 1.96 60 ft. Sure he's a bad driver, but i think a 1.7 would only drop him to 12.5-12.6

Someone with a perfect run might make a 12.3

OMG VTEC

You know the TD04-13T doesn't come mated to a 2.5L engine? Just the EJ205, which is a 2.0L. Basically you don't understand that compressor map and are referencing it anyways? Why do you keep going on about these cars if you don't even know what kind of engines are in them?

I'm not talking about cars barely touching the 12s on the stock turbo. I'm talking DEEP into the 12s. It's not uncommon like a 12 second 09, it's been done over and over to a point that it's not even impressive anymore.


12.4[media]http://www.youtube.com/watch?v=rnpnkZJPq9k [/media]


12.6[media]http://www.youtube.com/watch?v=w3WkNrEoQvo [/media]




Here's a car with barely any mods:

w00t692

Oh. The reason it's confusing is because that compressor map was referenced referring to an EJ25.

a 2.0L would be pretty well off with that turbo, lot of top end power. Mostly because subaru engines don't flow a whole lot of cfm.