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Nope, turbo is stock. The head was lightly ported while it was out of the car though, because why not. :)

No specific rpm or boost, just a matter of timing the throttle and brake pressure. Trying to build any meaningful boost on the line just blew the tires off. On the MTs it will take all of the boost it can make, but that doesn't always result in the best 60 foot. I got one of the two 1.59s that...

MT ET streets. Got a couple of 1.59s today with them (best on the stock tires was 1.71).

Got another stock turbo car for the "power adder" list. Vehicle, Trim & Options: 2015 EBM Premium Non-PP Auto Modifications (if any): Rods/Pistons, Downpipe, FFTEC IC, Tial BOV, TS WGA, Intake, self tuned on Cobb Fast List Category Submitted For: Power Adder...

I disconnected the stock catback again today and it made seemingly no difference. Same ET and MPH. It was probably ten degrees warmer than Wednesday night, so there may have been a slight gain, but it was slight. I may still install the cutout so I can do back to back tests on the same day, just...

Those are all fair assumptions. Bringing the second turbo online at 5k just reminds how weak these motors are in the RPM department though. On a 4g63 I can make say 40 psi from 3500 to 10k rpm (the white 2g), which really gets it done. I'm sure the right size turbo could widen that power band...

I don't see how dropping 14 psi of back pressure could not help. I'm going to try a cutout on this downpipe. I bought the cheap one on purpose so I wouldn't feel bad modifying it. In this configuration the car ran a 12.1 at 112 on a shitty 1.73 the other night. With a more typical 1.63 it...

I haven't really sat down and looked at LP turbo options for the stock turbo (since I still haven't decided what I even want to do with this car), but when I do I'll let you know what I come up with. I have an idea of what I think would work, but haven't done the math and don't want to steer you...

I run a few compound turbo setups. I've run them into the low 8s in my Talon, low 9s in an AWD street talon, and I've helped design or tune at least 50 more around the world. There's a great thread on Yellowbullet in the turbo section that I started in 2010 on the subject, the best resource I...

WTF. It's ok, go on without me guys, I'll wait here.

Bastards! They already gave me map compare and then took it away. I have no stability in my life...

Thanks. It does seem like it's right on then with the stock exhaust anyway. Way off with the open downpipe of course. Edit> I still don't see that info in the speed density section. Perhaps it's just another limitation of the single user license software.

Where are these values found? If they're available in the Cobb software I'm struggling to find them.

Pressure ports are in the following locations. I tapped the stock downpipe in the same location.

I agree on all points. I really haven't pushed ignition timing, for the sake of pump gas and the stock turbo back. It's certainly time to lean on that a bit and see what it wants. I meant to take it up to the track yesterday and try some race gas of some variety (I haven't run E30 since last...

I've got some old ATP 3" vband boost actuated cutouts. Real slick parts, I'm glad I grabbed a couple back when they still made them, which was at least 10 years ago. I used one on my EVO with a couple of solenoids, a 1 quart pressure tank, and a MBC to provide a little more control. I could lock...

Yes, that is stock downpipe. I should also point out that this offroad downpipe has the removable piece that necks down to the stock catback. The test was without the adapter, straight 3" to atmosphere. I meant to test with that on to see what that drop in diameter is worth. At 42 lbs/min I...

Well, strange results. Today the cheap downpipe came in. I welded a bung to it and threw it in. Here are the numbers. Stock downpipe, stock catback - 14 psi exhaust pressure, 42 psi turbine pressure Stock downpipe only, no catback at all - 14 psi exhaust pressure, 42 psi turbine pressure...

Those were the days. :D And thanks, it was a hell of an effort. It was a DSM record for about a year, and has been surpassed since by a few hundredths. By a lightweight FWD car of course, bastards.

Good one, I'll log it. I'll bet the model is only close when the car is bone stock of course, but it will be interesting to see.