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SI ECU tune in SoCal

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Old 02-13-2008, 02:43 PM
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Originally Posted by e1000
OK. So, it's been a week since I got my ECU tuned with the SI software. Here are my thoughts.

Power - We all know that there are various ECU tunes out there. Powerchip is the other big one and it also advertises larger HP gains. I went with the SI tune beacause although it's down on peak HP numbers, the TQ numbers are higher. Although I haven't seen dyno charts of both, this most likely means that the SI tune was done to give a broader, fatter power curve. Driving the car around town reflects this as it seems to have gained quite a bit down low and a bit less at full boil. The car feels very strong from about 1,800rpms and up.

Drivability - This was the only thing I was nervious about when getting an ECU tune done. I'm glad to report back than other than the increase in power, the car behaves no differently than before. It dosen't sputter or feel any different at idle. There are no unusual sounds and no CEL.


Big thanks goes out to K1, SI and Gintani for my ECU tune!!!!!! I love it and the only issue is I want to go back in the car and take it for another spin!
E, after you get done smashing the throttle to renew the grin on your face , can you report back on how the tune has affected gas mileage?
Old 02-13-2008, 02:45 PM
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a quarter mile at a time
Originally Posted by johnand
E, after you get done smashing the throttle to renew the grin on your face , can you report back on how the tune has affected gas mileage?
most definitely! It's good beacuse I've been driving it around quite a bit around LA and I'll have to drive it back to AZ. I'll reset the trip counter after I get through the hills and see if I can hit my normal 28-30mpg on highway stretches. Around town, the gas mileage has been very similar to before.

MJ50: ECU tune FTMFW!!!!!!!!!!!!!!!!!!!!
Old 02-13-2008, 02:50 PM
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nooooooooice!

you and Andy should duel it out with the C350's!
Old 02-13-2008, 02:51 PM
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a quarter mile at a time
Originally Posted by nlpamg
nooooooooice!

you and Andy should duel it out with the C350's!
I'm a lover, not a fighter. Besides, come thursday, I'll have my CF kit installed. Do you REALIZE the weight reduction I'll have???!?!??!?!?!???!?!
Old 02-13-2008, 02:52 PM
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Originally Posted by e1000
I'm a lover, not a fighter. Besides, come thursday, I'll have my CF kit installed. Do you REALIZE the weight reduction I'll have???!?!??!?!?!???!?!
I was just about to say! craaaaazy weight reduction!
Old 02-13-2008, 02:52 PM
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Originally Posted by nlpamg
nooooooooice!

you and Andy should duel it out with the C350's!
u r next biyach!
Old 02-13-2008, 02:53 PM
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Originally Posted by e1000
Besides, come thursday, I'll have my CF kit installed.
u mean thursday?
Old 02-13-2008, 02:53 PM
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Originally Posted by MJ50
u r next biyach!
I'll beat you in the twisties!
Old 02-13-2008, 02:54 PM
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a quarter mile at a time
Originally Posted by MJ50
u mean thursday?
i changed it!!!!!!!! hahah
Old 02-13-2008, 03:30 PM
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Originally Posted by nlpamg
I'll beat you in the twisties!
actually, i meant ECU tune...
and u may beat me with ur m3, but not with ur 4matic C230K
Old 02-13-2008, 03:33 PM
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a quarter mile at a time
Originally Posted by MJ50
actually, i meant ECU tune...
and u may beat me with ur m3, but not with ur 4matic C230K
Old 02-13-2008, 04:56 PM
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Originally Posted by e1000
hey, no laughing! we're at the same height!
Old 02-13-2008, 04:57 PM
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Originally Posted by MJ50
actually, i meant ECU tune...
and u may beat me with ur m3, but not with ur 4matic C230K
hey, drex has seen how good quattro all-road is in the twisties!
Old 02-13-2008, 05:00 PM
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Originally Posted by nlpamg
hey, no laughing! we're at the same height!
hahaha... that was good one phil...
Old 02-16-2008, 08:56 PM
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a quarter mile at a time
Talk amongst yourselves.
Attached Thumbnails SI ECU tune in SoCal-02-16-08_1734-small-.jpg  
Old 02-16-2008, 11:09 PM
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Haha, nice average MPH and MPG. I'd be a bit happier though if the needle to the left was pointing at the 140 or higher. Especially knowing you were taking pictures while driving that fast... that would be BA.

Instead of making a new topic... Would getting an SI ECU tune be worth it on my C240? The claims are about 20HP and 20ft/lbs tq more than stock if tuned for 93. Considering it only has 168HP and 177TQ (off the top of my head) that would be a pretty good increase % wise. I've read other threads on the subject, but was unable to find one where someone had their C240 tuned and posted results (real and/or butt dyno).

Anyways, glad to see your enjoying the tune E.
Old 02-17-2008, 01:20 AM
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Originally Posted by nlpamg
I'll beat you in the twisties!
I'm down for that challenge
Old 02-17-2008, 10:45 AM
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Originally Posted by e1000
Talk amongst yourselves.
Downhill or it must be really flat in AZ?
Old 02-17-2008, 04:48 PM
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Wow, those are some fine readings. Reminiscent of your Prius thread. I’m jealous!
Old 02-17-2008, 07:31 PM
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a quarter mile at a time
Originally Posted by johnand
Downhill or it must be really flat in AZ?
the road was pretty flat for the most part. basically I reset the counter when I was about 120mi from Phoenix. They were pretty much ideal conditions though. I'd say realistically, I would average 31.5mpg highway. Now with the ECU tune, I don't think the gas mileage has gotten any worse, but I have a much greater tendancy to drive the car harder. All things being equal, I think the gas mileage is about the same.
Old 02-17-2008, 09:28 PM
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Originally Posted by e1000
the road was pretty flat for the most part. basically I reset the counter when I was about 120mi from Phoenix. They were pretty much ideal conditions though. I'd say realistically, I would average 31.5mpg highway. Now with the ECU tune, I don't think the gas mileage has gotten any worse, but I have a much greater tendancy to drive the car harder. All things being equal, I think the gas mileage is about the same.
E, thanks for the update. I was hoping for a nice increase in MPG, but if it stays the same, that is fine with me. Definitely the SI ECU tune is the next on my mod list. Since I have an 07 which is flex fuel, I am hoping for a mileage boost running E85. Since most cars seem to lose 15-20% running E85 and I am losing 25-30%, hopefully the tune will get me closer to the 15-20%.

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