Tuning the 2.5i by Xtreme Racing Tuning (Tuner: West_Minist)

[west_minist]

v9a 3rd Gear Dyno IATs=28-24C.png

Dynoes were performed travelling in both directions, since the road is not flat.

[HyRax]

How is the car?

Hi Edward,

Car's still going great. Weather is starting to cool now that we're off Summer so the car is ripping along nicely. No issues to report.

Did a very unscientific 0-100 speed test the other day using a GPS-based speed measuring app on an Android phone and scored a 9 seconds average (factory 0-100 time according to Subaru is 11 seconds). I could probably improve this by a second with a proper launch because that's where much time is lost, but I was trying to do it without attracting too much attention to myself.

Did you see the Raptor SC on the 2.5i?

Yeah I did - very impressive, but probably a little beyond what I'd be prepared to do to my own car!

[west_minist]

You can always load the stock rom and see.

I wonder if there is any goods ones for my bb???????

I upgraded to the 9860 and waiting for the BB London or BB London II.

Update, I never search. lol. I found a few, but I will see how this one works.

http://gpspeedometer.com/UserManual.aspx

[HyRax]

If I get some time this weekend, I might re-load the stock ROM and compare. Better something than nothing I guess!

[west_minist]

Any updates?

[HyRax]

No sorry - didn't get time. Will probably get some time later this week, though.

[HyRax]

Just completed a 1,200 kilometre round-trip from Sydney to Temora for the 2012 NATFLY event over the long weekend carrying about 100 kilos of camera gear.

In two tanks of BP Ultimate (98 octane) fuel, i'm pleased to report that the car attained a consumption of 8.4 litres per 100 kilometres (as reported by the car) and attained a new personal best of 758.4 kilometres on one tank before refuelling. I could have gone longer, but I wasn't prepared to let the car surge. The refill on that tank was 60.5 litres, so I still had 3.5 litres to go possibly allowing another 30-50 kilometres of travel. Fuel Warning light came on at 130 estimated kilometres to go and the car stopped giving me estimates at 50 kilometres to go. The travel was all highway between 100kph and 110kph at about 2,900rpm in fifth gear via cruise control, with minimal stops for breaks plus the obligatory slowdowns to 50-60kph for various townships. Ambient temperatures were between 12 and 19 degrees from morning to dusk (as reported by the car). Air-conditioning was not used and windows were all shut (with air provided by the vents being in "fresh" mode rather than recycle mode).

Due to this long range attained on the tank, my new best-record for the car's reported estimated-distance-to-empty after refilling was 860 kilometres! Not that I think I'd ever achieve that...!

I should add that before starting the trip, I completed a 6,000K interval oil change of Castrol Magnatec 10w40 and also added a full bottle of Subaru Fuel Additive to the fuel tank after the initial fill-up.

[west_minist]

Woow. That is great.

Here is another 2.5i I am tuning.

viewtopic.php?f=15&t=17626
http://www.xtremeracingtuning.com/forum ... f=40&t=429

[west_minist]

Was a little bored and did some rescaling and remapping. Time spent on this car valued more than what the customer paid

Update on car with more tweeking
http://www.xtremeracingtuning.com/forum ... 1298#p1298

V7 have greater low end torque

From: NickT
Sent: Wednesday, July 25, 2012 8:08 AM
To: Edward
Subject: RE: v8

I first installed in back before my surgery while I was on holidays and drove home with it. I can't really remember how v6 was but I remember having some amazing fun on the way home with v7 when I was in the high rpm range

I remember noticing some slight changes in the top end. It seemed to hold on to the power as it went over 5000rpm. When the car really starts to surge at around 4000rpm the power seems to drop away a bit at about 5000rpm. v7 felt like it improved this and helped it to hold onto the power. Instead of that fantastic surge of power between 4000-5000 fading away just as I start to enjoy it, it now seems to last longer. The combination effect of all the changes has made me think twice before planting the throttle coming out of the turns!!

I specifically remember a winding set of turns through the mountain where it was perfect to just hold in 2nd gear, working between 3000-6500rpm felt fantastic!! The car felt VERY aggressive and I went on/off the throttle and I could feel the power wanting to kick the car into under/oversteer (AWD working hard to keep me alive lol).

[turner_822]

Those graphs are awesome Edward!! They tell such a small part of the story, the car feels FANTASTIC to drive!! The best part is re-loading the stock and feeling the boring and sluggish it is. With stock settings, I put my foot down and its like the engine takes a moment to decide what to do...and I get bored, lol.

It is like two different cars!! The way it picks up speed down in the low RPM, the extra torque and the way it immediately reacts when I touch the throttle. It's hard to describe but put it this way, I took my friend for a drive before and after v7 and had him giggleing like a school girl by the time I'd wound out 3rd!!

I feel spoilt rotten and lack the works to thank you for all the extra time you spent tinkering with this Edward!!

[west_minist]

[turner_822]

The car felt even faster! It was hauling when I first set off with the intake temp around 18 degrees. Then it stabilized at about 23-25 degrees but it was still going really well. I noticed in particular how it behaved when cruising in 5th gear at 100km/hr. It sits at about 2600rpm and when I put my foot down it instantly starts picking up speed and pulls up hills really well. It has this real surge between 2500-3000rpm that was definitely not there before, in fact it used to feel like crap when you put your foot down in that rpm range but now its great!!

I can't get over the pull it has between 4-5000rpm. Going from 1500rpm, its a bit slow but then really picks up between 2500-3000rpm. Its a bit slow from 3000-4000 but then it takes off between 4000-5000 and that surge makes for my favourite part the car's performance.

Power seems to fade a bit as it gets higher (5000 up to 6500rpm) but it's still way better then it used to be. I absolutely love the howling noise the engine makes as it approaches 6500rpm, it says just when to change gear. I know its probably howling in pain and agony, but I don't push it that hard very often and my service intervals are now every 5000km or ~4 months (although recently I have been doing a lot of hard driving for logs...)

Biggest imporvement by far though is the low-mid range power, and I find it getting the better of me sometimes on roads that I know really well. It has made everyday driving 10x better. With a supercharger I will definitely be looking to upgrade my brakes to avoid those bowel clenching moments

To see the difference between stock and v9 still amazes me...especially considdering a stack of local places that basically told me I was an idiot and you can't improve on a so-called perfect stock tune...read the graphs and weep 98 kW - 108 kW and 172 Nm - 191 Nm.

Nice work Edward, improving on what many called "perfection" lol

[west_minist]

v9 vs Stock - 3rd Gear Dyno SAE

[modern_messiah]

OK so I might be being a little naive here but what exactly is this tuning method? Do we drive the car, upload a few files for you and then you come back with a new ROM to try?

Sorry, I've been out for a LONG time and have decided to make a decent fist of working on my car (without going nuts). Also apologies if this is discussed elsewhere already. I have looked but must be blind

Yes I'm a nub....but we all need to start somewhere!

- Matt

[west_minist]

Yes. You will log, I will make changes. You will upload and the procress will start all over again.