legacycentral bbs

The motor's broken in, and I took it to the dyno.

I got 153 HP at the wheels, and around 156 ft-lbs of torque.

Not too bad for a pretty much stock ej22t with bolt ons. The dyno I was on doesn't use any correction factors, so it's pretty accurate, and is probably lower then most.

Power mods:
MSD Dis 2 ignition
Stock sized lw pullies
lw flywheel
magnecor 8.5mm wires
CES 3" turbo back exhaust
modified stock air box

Other interesting note is the tuner guy mentioned I'm running a little lean until about 4500 rpm, most likely due to the fact the small turbo builds boost so fast, but then I'm running a little rich afterwards. So a little tuning will probably smooth out the AFR. Boost level stayed pretty consistent across the entire rpm range.
http://www.main.experiencetherave.com:8 ... gdyno1.jpg
http://www.main.experiencetherave.com:8 ... gdyno2.jpg

Not bad! Not bad at all!

What did you do to the airbox to modify it?

12.5:1 doesn't really seem TOO bad. Still rich, but not rich enough to feel safe.

My car, with the 16G, did exactly the same thing. 12.8:1 and tapering back down. Mine never got more rich than 11:1 though. Tuning would definately help up top.

No video? j/k. Good shit!

What psi? Pretty damn good.

Post your map, I want to compare.....

Is it the goal to try and maintain a steady AFR? I'm trying to learn as much as I can about tuning. I just got a pretty sweet book on EFI tuning yesterday, but I haven't had time to get into it.

In general, it seems that the higher the boost, the higher the rpm, you want the AFR to slightly drop as you go up, but averaging about 11-1 ish.

Which book did you get?

I've skimmed several books and lots of them focused on N/A tuning. I haven't found a really good boost tuning book.

I am going to try to sit in with TurboXS while they tune, and see if I can get a better understanding of how they do it.

It's easy to know the ultimate goals of tuning, but it's knowing what to change and how to change it, that's the key.

copied from Cobb somewhere.

"Target A/F Ratios are mid 12's under load before the onset of boost. Under full load by 3500 RPM the A/F Ratio will drop to mid 11:1 and gradually run richer as RPM's increase ending at mid to high 10:1 A/F at redline"


So looking at this dyno graph.....

http://www.rallitekforums.com/forums/at ... 1723&stc=1

you see they have a red dashed line. This is the "target" afr, but you want it below this at the higher rpms so be safe. This vehicle probably could have used some fuel at the lower rpms to bring down the AFR to be safer.

This car by the way was a 2.2 block with WRX heads.

This is a good thread on AFRs

http://forums.nasioc.com/forums/showthr ... erfect+afr

BAC5.2 wrote:Not bad! Not bad at all!

What did you do to the airbox to modify it?

12.5:1 doesn't really seem TOO bad. Still rich, but not rich enough to feel safe.

My car, with the 16G, did exactly the same thing. 12.8:1 and tapering back down. Mine never got more rich than 11:1 though. Tuning would definately help up top.

I added an extra intake tube and removed the snorkel.

You can see it here
http://www.surrealmirage.com/subaru/ima ... ntake1.jpg
http://www.surrealmirage.com/subaru/ima ... ntake2.jpg

I think the stock ECU's tuning or what not isn't all that great, especially if others are seeing the same thing.

Other thing to note is that these numbers are post catalyst. So pre cat, they're probably just a little richer. I asked about the catalyst, and he said it'd probably be a little richer, but didn't say how much. I may look into seeing if I can get an answer.

Guess if I'm going to do some real tuning, I should look at a wideband.

subyluvr2212 wrote:No video? j/k. Good shit!

Actually, one of the guys there did let me use his camera, so I did shoot some video. I'll post it when he gets it to me.

BTW, I'll post my pp logs too when I get a chance to look over them.

douglas vincent wrote:What psi? Pretty damn good.

Post your map, I want to compare.....

You can see on the 2nd dyno sheet, boost is the top curve. I'm running stock boost, which is right around 9 psig.

One of things Dan, the tuner said is, my boost is holding strong all the way through the rpm range, which is pretty good compared to some of the guys there. Our ECU doesn't appear to pull boost as rpm increases or is dependent on what gear we're in.

The dyno was on a completely stock setup, all the maps zero'd out. I can post it if you'd like though.

BAC5.2 wrote:Which book did you get?

Ditto....I'd like to know the book too.

Here's the data logs.

The battery in the laptop went dead on the first run, so I only got the last two.
http://www.main.experiencetherave.com:8 ... gging2.xls

So with a rough 20% loss due to drivetraink, you were looking at about 190 chp, right?

Which means the CES resulted in a nearly 30 hp gain. Not bad.

I've got other things on there besides the CES that contributed. I'd question whether all the gains came solely from the CES.

that's pretty cool.

how is that 16G treating you thawa? I know i miss it.

hmm what happened to the torque though? seems like its right around 100, i thought that even with some bolt ons that there would still be more torque than HP?

Natoe wrote:hmm what happened to the torque though? seems like its right around 100, i thought that even with some bolt ons that there would still be more torque than HP?

Look at the right ft-lb scale for torque.

Found out something interesting today. Apparently the dyno I was on is rather conservative.

You can check out this thread for various other newer subes, and what they're making.
http://forums.nasioc.com/forums/showthr ... ?t=1005126

Interestingly enough, my numbers are about 20-25 hp below what a stock FXT makes.

the 150 numbers were amazing first of all... thats even cooler to see that come out like that compared to an FXT, congrats again.

This makes me wonder what my Ej20G will put out. Legacy777, what tranny do you have?

turbo legacy tranny.

wow ur numbers are awesome. i wonder what i am putting down...

It's kinda weird that your torque wasn't higher.