Just got done tuning yet another 07sti limited, and I am starting to see a patern here.:devil:

This customer drove up from New Orleans and had us install a Cat'd downpipe, boost, egt, and oil pressure gauges, and then do a customer Tune.

Mods: Cat'd Downpipe, Topspeed Ecutek

Base Lined with just the downpipe 263hp 263tq
After the Topspeed Ecutek tune 312hp 354tq

http://i16.photobucket.com/albums/b4/badazzcr/stg1-07limited.jpg

not bad.

what is boost set at?

you need to get one of these ltd guys to run their car at the track.

makes you want an 07 sti...they seem to be responding hella good to mods...did anyone figure out exactly what the major gains on the 07's are contributed to vs previous sti's?

not bad.

what is boost set at?

19.5psi peak tappering to 15psi at redline.

oh boy

doug are you trying to tell us that we need to get an 07?? me and my girlfriend just got a 07 spec B. got any experience?? heard that its the same ecu as the sti but with that si drive crap, smooth though.

Cliff

makes you want an 07 sti...they seem to be responding hella good to mods...did anyone figure out exactly what the major gains on the 07's are contributed to vs previous sti's?

I would say it does NOT respond good to mods.......yes it make good power but look at the afr on moded 07s w/out a tune.

Damn, i should have waited, i wanted a limited bad, i want it worse now. :(

doug, ask one of these 07 owners if they'll let me borrow their car for an evening :devil: . I'll head south to Montgomery and run teh qtr :banana:

Damn, i should have waited, i wanted a limited bad, i want it worse now. :(

you'll say the same thing when the 08 comes out so quit it already....

doug, ask one of these 07 owners if they'll let me borrow their car for an evening :devil: . I'll head south to Montgomery and run teh qtr :banana:

Not until the end of jan.:(

Fortunately its getting repaved with concrete.

you'll say the same thing when the 08 comes out so quit it already....

:furious: stuff it.



:p :lol:

That whp n wtrq ?

263 - 263 stock with just a down pipe ? IS your dyno reading high or is the 07 making more power than the previous STI's ? Al

Is 19.5 lbs of boost streching it for a daily driver on the stock turbo or is this fine on the new 07 turbos?

263 - 263 stock with just a down pipe ? IS your dyno reading high or is the 07 making more power than the previous STI's ? Al

:rolleyes:
Your one to talk about high reading dyno. You dynoed a STOCK Limited and it made 270 correct? I believe your dyno is the highest reading dyno.

263 - 263 stock with just a down pipe ? IS your dyno reading high or is the 07 making more power than the previous STI's ? Al

Didn't a stock STI limited made 270 WHP and 280WTQ on your Dyno Dynamics? I would think that the new ECU will allow the new STIs to surpass the power of the 04 to 06 STI when tuned from what both Doug has said.

Shaggy owned the Defiantspaz :(

i think Doug mentioned that stock 07's put down 245-250whp on their dyno.

I am just curious - it seems like more than previous STI's

As i have said I am conducting a dyno comparison shortly

07's look good

i think Doug mentioned that stock 07's put down 245-250whp on their dyno.So a down pipe without tuning is worth nearly 20 whp ?

^yep. in dougs other thread it made 245 stock and 280 with a aps header and a tbe, no tune. So a header and tbe w/out tune is good for almost 40hp

^yep. in dougs other thread it made 245 stock and 280 with a aps header and a tbe, no tune. So a header and tbe w/out tune is good for almost 40hpThe 07 looks promising indeed

So a down pipe without tuning is worth nearly 20 whp ?

here's a quote from another thread, 07 Limited STi

I keep telling myself I am not going to buy a new 07 Limited, but after each one I tune its getting harder and harder. This car is an absolute monster, I have never seen a STG2 sti make this kind of tq and power on pumpgas.

First graph is a stock 07 Limited vs an 07 Limited with APS header and 3" turbo back exhaust. There are some really nice gains up top due to the free flow exhaust system.

Stock 242hp 245tq
Headers and Turbo Back 282hp 284tq

Are you seeing the same with regular 07 STi's?

So a down pipe without tuning is worth nearly 20 whp ?

Pretty shocking but its true, the 07's respond very well to mods even without any tuning. Unlike earlier model STI's, the 07s ecu has the ability to add alot more timing over the base, and does it much faster. Freeing up the exhaust back pressure allows the factory ecu to advance the timing, which is why there are such big gains even on untuned cars. Now don't get me wrong the 07sti ecu's are very far from perfect, actually I think they are worse than previous models hence the low rpm stutter.

As for power I would say stock for stock they dyno within a few hp of the 04-06 sti's. I have dyno'd three stock limiteds so far, the lowest making 240hp and the highest has been 248hp.

Pretty shocking but its true, the 07's respond very well to mods even without any tuning.

As for power I would say stock for stock they dyno within a few hp of the 04-06 sti's. I have dyno'd three stock limiteds so far, the lowest making 240hp and the highest has been 248hp.

It seems that the 07 STI ecu advancements are a similar kind of step up as the Evo IX was over the 08 as far as its respopnse to minor modifications.

We have observed the partial throttle driveability issues as well - hopefuly SOA will address those in future ecu soft ware updates

Impressive work Doug!

Just wanted to thank Doug, Tray, and the entire crew at Topspeed. The dyno at the top of this thread and Doug's post is about the work they did on my car a few hours ago. Just got back to New Orleans and the difference is a beautiful thing, I couldn't be happier with the car and the experience.

Thanks again.

Cya when I get hungry :D .

H

Al I'm tempted to see what you could get out of my 07 Ltd. I'd only have to take an hour and a half drive to find out. I'd love to make 300+whp.

soooo... anyone know if the actual engine is different or if it's just the ECU? The ECU could be put into older STIs if that is true.

soooo... anyone know if the actual engine is different or if it's just the ECU? The ECU could be put into older STIs if that is true.

Huh? How would an ECU change bring more power out of the same engine? A different ECU especially means nothing for making power once a 'tuner' writes over the code. A new ECU will certainly NOT overcome mechanical limitations...

That being said, there are tons of thread's on the mechanical changes in the 2007 STi's. Most notable is the revised head design and the larger wastegate on the turbo, which most believe are the reason/s behind the power increase. I think it is revised head design that does it though. Oh, and because of the changed head, sodium-filled exhaust valves are gone.

Huh? How would an ECU change bring more power out of the same engine? A different ECU especially means nothing for making power once a 'tuner' writes over the code. A new ECU will certainly NOT overcome mechanical limitations...

That being said, there are tons of thread's on the mechanical changes in the 2007 STi's. Most notable is the revised head design and the larger wastegate on the turbo, which most believe are the reason/s behind the power increase. I think it is revised head design that does it though. Oh, and because of the changed head, sodium-filled exhaust valves are gone.

oh I didn't know it was THAT different just kinda skimmed over it and read about the untuned mods and how the ECU did some timing advancements

The ECU hardware is the same as 05-06 STI. The 04 is a slightly older version of the same CPU, but still essentially the same.

It is just new maps and some new logic. The logic is mostly the same. There isn't all that much different that isn't obvious by comparing the maps.

I would be surprised to hear that after tuning the drivability issues persisted. I'd guess most of it would go away just by shortening various OL/CL delays and switch levels to get the car into open loop faster.

On the base run, the AFR is over 14:1 until 3700rpm or so. Whats the deal there?

is he running his stock exhaust? How much louder did the car get with just the cat'd dp? I really want to mod my '07 ltd, but don't want to make it much louder.

On the base run, the AFR is over 14:1 until 3700rpm or so. Whats the deal there?

thats why i said earlier that they might make good power when you just throw parts at them but it def not safe without a tune

On the base run, the AFR is over 14:1 until 3700rpm or so. Whats the deal there?
The factory ECU has stupid long closed to open loop delays and thresholds. I would assume that is what you're seeing, and obviously it was fixed when tuned.

Al I'm tempted to see what you could get out of my 07 Ltd. I'd only have to take an hour and a half drive to find out. I'd love to make 300+whp.

throw a dp and catback on and do it!:devil:

^yep. in dougs other thread it made 245 stock and 280 with a aps header and a tbe, no tune. So a header and tbe w/out tune is good for almost 40hp


But what is even more important than peak numbers is where and how the power comes in. If you notice in the graph posted above, the 07 isn't just making 49 more hpp and 91 more ft lbs,...but very early on (3,500 rpm) it is making 125 MORE ft lbs than stock, That's going to be a HUGE kick in the pants on the street. A slight bit less drivable on the road course, but a real riot on the street.

Maybe the gearing his helping to inflate the HP/TQ figures.

I would assume that the tune resolved the 07 hesitation issues. Is that the case?

I would assume that the tune resolved the 07 hesitation issues. Is that the case?

yeap. completely gone