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Old 08-18-2007, 01:12 AM   #1
STi Mikey
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Default Well, no power bragging here.....

Hey Nasioc,

Three weeks ago I traded in my 04 STi w/63k in for a brand new 07. Ive since driven 1500 miles and have begun to open the car up on the highway slightly. A few days ago, one of my good friends and colleague purchased an 04 w/39k. Now, my 04 was a freak of nature to say the least. Before the car had ever even seen a dyno I went 12.4 at 110.6. It seems that my deal with the 07 is the exact opposite. I am aware of the hesitation problems regarding the 07 ecu's. However, tonight my friend and I decided to do some short sprint pulls in interest of seeing if the hype of the 07 gearing is everything its bumped up to be. I would accelerate a full 2-3 seconds before he started, and within 5-8 seconds he would blow by me as if his car had 40-50whp more. WTF is going on? Checked his boost, just about 14psi on the gage. Is there still a large amount of friction in the block with the stock oil (which is being changed tomorrow)? I already have an appointment to be tuned by xx chris, but thats not for another month and a half It seems that at 5k the car starts to pull timing and its a disaster pulling after that. Just looking for some feed back. Not really a newbie when it comes to owning and driving sti's. However, when it comes to owning a brand new sti im for sure a newbie.
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Last edited by STi Mikey; 08-18-2007 at 01:17 AM.
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Old 08-18-2007, 02:41 AM   #2
Imfasterthanyourevo
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mine was this way until i got it tuned as well, but now its a beast to say the least.
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Old 08-18-2007, 03:55 AM   #3
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Just get it tuned. Honestly, it's the only way to get things to smooth out.
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Old 08-18-2007, 07:38 AM   #4
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I would just drive it normally until you get a tune. 07 STi have the worst tune i've ever seen from factory. I mean they run 14+ A/F ratios at full boost up to almost 4,000 rpm. And it won't learn from past knock events... just do a search. You will see!
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Old 08-18-2007, 08:43 AM   #5
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getting tuned by chris is the best mod you will ever do, period.
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Old 08-18-2007, 10:52 PM   #6
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great topic
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Old 08-18-2007, 11:00 PM   #7
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SOA really messed up all the '07 cars. At least the 07 STi can be flashed. The 07 LGT can't.

The 07 ecu is definitely more advanced than previous ecus but the stock tune is really bad. I don't know if SOA did that for fuel economy or emissions.

Read up on this thread:

http://www.enginuity.org/viewtopic.php?t=1568

CN: opensource tuners discover 07 STi tune sucks. Works together to retune it properly.
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Old 08-19-2007, 01:16 AM   #8
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Yep, its the stock tune, its terrible. Get a tune and you'll see that it'll be a whole different story.
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Old 08-19-2007, 07:27 AM   #9
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shoulda stuck with the 04 haha, just kidding hope it work outs.
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Old 08-19-2007, 10:24 AM   #10
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tune it, then watch him fall back 5 cars
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Old 08-19-2007, 04:23 PM   #11
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Perhaps some one can walk me through this but........

I fail to see how longer gears will equal faster acceleration.

Forever in drag racing people have changed gearing to shorter gears for better acceleration.

I do understand in the 1/4 mile how 07 gearing will eliminate a shift to 5th, but other than that shift being eliminated why would longer gearing be quicker to accelerate.

It simply does not make sense given equal power.

lets have a thought experiment.....

same engine power, car weight etc....

one has an 04 transmission and the other has an 07 transmission

0-60 which is faster?

40-100 which is faster?
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Old 08-19-2007, 05:14 PM   #12
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Def tune. Should make all the difference in the world!
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Old 08-19-2007, 05:24 PM   #13
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Quote:
Originally Posted by Thedaddy View Post
Perhaps some one can walk me through this but........

I fail to see how longer gears will equal faster acceleration.

Forever in drag racing people have changed gearing to shorter gears for better acceleration.

I do understand in the 1/4 mile how 07 gearing will eliminate a shift to 5th, but other than that shift being eliminated why would longer gearing be quicker to accelerate.

It simply does not make sense given equal power.

lets have a thought experiment.....

same engine power, car weight etc....

one has an 04 transmission and the other has an 07 transmission

0-60 which is faster?

40-100 which is faster?


I both argee and disagree with longer gears there is more efficency assuming your doing just quarter mile at the strip but the highway roll shorter gears can be more efficeint depending on the powerband of the car.
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Old 08-19-2007, 05:35 PM   #14
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Quote:
Originally Posted by BAMBAMSTI06 View Post
I both argee and disagree with longer gears there is more efficency assuming your doing just quarter mile at the strip but the highway roll shorter gears can be more efficeint depending on the powerband of the car.
People have always put numerically higher gears to increase acceleration and that is what is confusing. The new STI evidently has numerically lower gears thus it should not pull as hard.

Coming from the RWD crowd people changed out the rear end from 3.xx to 4.11 for acceleration. No one ever went to other way around.

The only benefit to longer gears I could see is the lack of shifting in 5th in the 1/4 mile.
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Old 08-19-2007, 05:38 PM   #15
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Quote:
Originally Posted by Thedaddy View Post
...one has an 04 transmission and the other has an 07 transmission

0-60 which is faster?

40-100 which is faster?
With both engines running in prime condition(no ECU problems, hesitation, etc.), the one with the '07 gearing should be faster 0-60, and 40-100. You will need one less shift to do both.

'04 STi, 0-60, 1st, 2nd and 3rd.
'07 STI, 0-60, 1st and 2nd.

'04 STi, 40-100, 2nd, 3rd, 4th and 5th(barely).
'07 STI, 40-100, 2nd, 3rd and 4th.
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Old 08-19-2007, 05:41 PM   #16
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Quote:
Originally Posted by Evil STI View Post
With both engines running in prime condition(no ECU problems, hesitation, etc.), the one with the '07 gearing should be faster 0-60, and 40-100. You will need one less shift to do both.

'04 STi, 0-60, 1st, 2nd and 3rd.
'07 STI, 0-60, 1st and 2nd.

'04 STi, 40-100, 2nd, 3rd, 4th and 5th(barely).
'07 STI, 40-100, 2nd, 3rd and 4th.
So the shift would make up time lost by revving slower and perhaps build boost slower?
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Old 08-19-2007, 05:58 PM   #17
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I don't understand what you mean by 'boost build slower'. You are dealing with turbos(VF39, VF43) that are slightly larger than a grown man's fist. Boost response after a redline shift should be lightning quick, regardless of '04-'06 or '07 gearing.

If '07 owners are experiencing slow boost response, do yourselves a favor and get a Cobb AP at the very least. All other year STis should be so lucky to have that gearing out of the factory.

You must understand that you are dealing with a torquey powerplant whose horsepower and boost taper off big time up top. If it were a Civic Type R that pulls to redline all day, I'd opt for gearing similar to what is in the '04-'06 STis.
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Old 08-19-2007, 06:57 PM   #18
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Quote:
Originally Posted by Evil STI View Post
I don't understand what you mean by 'boost build slower'. You are dealing with turbos(VF39, VF43) that are slightly larger than a grown man's fist. Boost response after a redline shift should be lightning quick, regardless of '04-'06 or '07 gearing.

If '07 owners are experiencing slow boost response, do yourselves a favor and get a Cobb AP at the very least. All other year STis should be so lucky to have that gearing out of the factory.

You must understand that you are dealing with a torquey powerplant whose horsepower and boost taper off big time up top. If it were a Civic Type R that pulls to redline all day, I'd opt for gearing similar to what is in the '04-'06 STis.
I was generalizing about the thought experiment above. If engines are the same the short gear will rev faster thus building boost a little faster theoretically.
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Old 08-19-2007, 07:04 PM   #19
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Quote:
Originally Posted by Evil STI View Post
With both engines running in prime condition(no ECU problems, hesitation, etc.), the one with the '07 gearing should be faster 0-60, and 40-100. You will need one less shift to do both.

'04 STi, 0-60, 1st, 2nd and 3rd.
'07 STI, 0-60, 1st and 2nd.

'04 STi, 40-100, 2nd, 3rd, 4th and 5th(barely).
'07 STI, 40-100, 2nd, 3rd and 4th.
WRX with ppg's makes it to 100 in 3rd....

Atleast its damn close.
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Old 08-20-2007, 12:45 PM   #20
STi Mikey
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Thanks for the responses guys.


Getting out of the physics of the different ratios, just look to the vf39 and vf43 1/4 mile registry. So many people wanted that vf39 record, including myself. About 80% of the people who tried, couldnt even break a 12.7. Now look to the much smaller 43 registry. Only a few have ran their stg 2 07's in decent fall weather. I have known 2 STi's that have gone 12.1 with exhaust and a tune. There is also 2 sti's. i Believe that went 12.2 in the vf 43 registry form what I recall. I think it would be a solid conclusion to say that these are better drag cars (in general).
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