Sure, send me your email addy.

 

I have about 18k into the powertrain/turbo/fab with labor/tuning.

Keep in mind the the motor with the extensive headwork/cams/valvetrain/flowwork and the rock solid bottom end cost 8.5 k or so.

I have been very lucky on the cost side of my project...very unlucky on the timeframe side

 

I went 128 in a WRX a few weeks ago...but i don't own that car.

 

Nice warning..

I wish you the best SIR.....@ the end of Oct Sacramento Raceway is having a grudge night....I would love to have you come up for that....Thats were my STI will debut

 

Alright here's the comparo for pump gas numbers on 3 different turbo kits (3071 vs 3037 vs gt35r), with 3 different setups, but all tuned with XEDE.

Same chart, seen 3 different ways. Needless to say, the results were ... ahem ... mostly as expected.

l8r)

 

thank you soo much for doing this. correct me if im wrong, but it seems like the 3037 and 3071 spool almost identical, where the 3037 makes more power in the mid range and holds torque better up top. my question is, if the car with the 3037 changed its turbo to the 3076, would things change?

the 35r and stroker graphs are very nice, especially the way it spools. now here is my question, i live in an area that is 6000ft above sea level, the 35r on stock 2.0 would probably spool 500rpm later than at sea level, would it be worth the effort to do a 2.3 and 35r up here? i would be running 91oct and alky only.

 

The 3037 (aka 3076) in the graph was in the form of our Stg 2 kit which retains the factory twin scroll exhaust manifold vs equal length long-tube headers. The stocker, while not as sexy, results in better spool-up from what I've seen.

Shiv

 

I have an AMS 3076 on file. I'll post it up and if Ludi wants I'll email him the file to overlay...

The atmospheric conditions of these runs were absolutely horrible. It was 107 during the pump gas run and 104 during the race fuel run.

 

AMS 3076 in extremely hot conditions....

 

I wouldn't read too much into the late spoolup of my 3071. My setup seems to spool noticeably later than other AMS3071 setups, but also falls off less up top. My entire buildup has been with the idea of getting as much power in the upper rpms as possible. Mobounce, who runs 264 cams has almost the identical setup as me (built 2.0, etc) and he spools up 300 rpms sooner. So with a less aggresive cam setup, the AMS 3071 on a 2.0 liter will spool about the same as the AMS gt35r on a 2.3 liter. IMO the fact that my 3071 setup actually makes more power up top than the 3037 seems to support the notion that the 280s make more power up top at the expense of some spoolup (of course we're also talking 93 octane vs 91, so that doesn't hurt the topend either).

Smoggy, feel free to e-mail me the 3076 chart.

l8r)

 

Got it Smoggy, I'll post it up tomorrow - although it doesn't seem to be a fair comparison ... either the heat really affected the 3076 a lot, or something else was slightly off.

One interesting thing I noticed is that the stroked 35r on pump seems to have a power curve that matches up to the stock gearing very nicely. I'll see about graphing it tomorrow as well.

g'nite folks.

l8r) ...zzzz

 

Here is my 3076 hitting full boost at 3891 with a boost leak running an EMS:


It is spooling at 3700 now with the leak fixed.

Can anyone post logs to go with these dyno pulls so you can accurately see what speed you hit full boost?

 

Thanks for the input Mark. When you get the time, could you post up a log showing the same things in 3rd gear? It is not accurate (for comparisons sake anyway) to compare 3rd gear spool to your 5th. For example, In 5th gear I'm at 20psi at 3450rpms; in 3rd, it take me until about 3950. All the pulls above in the dynojet charts are 3rd gear pulls.

Interesting stuff.

 

It hits full boost at 4k in 3rd and you will probably be similar with the stroker and your bigger turbo. Clearly you get around 80-100 lbs more torque with your stroker, awesome spool and you can run a bigger turbo and spool it.


For roadracing or drag, it is a big advantage. I decided to just do a straight 4g64. My 2.4 is being built this month

 

Smoggy, sorry about the late response. Congrats with the numbers and having a running Evo. I guess I have not been as active in the forums as I used to be. Also, I am sure you will kill any STI that wants to try and get some action at the track (that is either on the quarter mile or the twisties).