GrimmSpeed Project Impreza L/WRX Dynos

[GrimmSpeed]

We're going to use this thread to post our dynos for our current project car. I also want to use this thread to show you the gains you should obtain with GrimmSpeed parts.

The car is a 96 Impreza L with an 05 2.0 WRX swap. I put the engine/exhaust/intake together completely stock just so i could get the car running and work out any bugs before i start mod'ing the engine, etc.

Build thread can be found here:
http://www.dirtyimpreza.com/forums/showthread.php?t=670

We are using Data Log Lab(www.dataloglab.com (http://www.dataloglab.com)) for all of our plots. We are using SAE correction so that way we can really get apples to apples numbers when we are taking pulls on different days. We are using this software solely for showing comparisons of before and after affects of mods/tuning.

Tuning wise we are using enginuity/ecuflash(www.enginuity.org (http://www.enginuity.org)). The enginuity site has been down for awhile but i spoke with owner of enginuity and he stated that it should be back up soon.

Well i just got done with a tune on the completely stock setup....
STOCK: 168HP/174TQ
STG1(no mods, just tune): 184HP/191TQ

http://www.grimmspeed.com/Dynos/project_l/STOCK_vs_STG1_tune_only.jpg

So we are looking at gains of 16HP and 17TQ...not to shabby for some mild tuning. Boost peaks at 16.5psi and tapers to 12psi at redline.

I know it would be better to put it on the dyno after every mod so we can see afr's but we simply dont have the funds to be dyno'ing the car every few days. Most of the new road dyno'ing software is pretty accurate so i'm not too worried.

Justin
www.grimmspeed.com (http://www.grimmspeed.com)

[the_wrath_of_Khan]

Why would you use SAE correction on a turbo car where a certain degree change ambient temp doesn't directly correlate to a change in intake manifold temps?

[ProjectBomber]

wow... that's pretty impressive. 24 php from just a tune and more importantly you broke the 200 mark in torque.

[GrimmSpeed]

Why would you use SAE correction on a turbo car where a certain degree change ambient temp doesn't directly correlate to a change in intake manifold temps?

because i live in minnesota and we are more than likely way outside that degree of change. last week it was -25 out. two days later is was 42 out. that is a 67 degree swing in a matter of 2 days.

are you still disagreeing that i shouldnt use it?

[the_wrath_of_Khan]

I was never disagreeing I was only asking. Still I thought SAE correction was only for N/A cars.

[BlackParis]

so wait? this is JUST a stock engine +open ECU tune? No gaskets/Spacers/Pipes of any sort?

[GrimmSpeed]

I was never disagreeing I was only asking. Still I thought SAE correction was only for N/A cars.


oh no..i wasnt saying that in a nasty tone...i was actually asking ya if you agreed that that was a good reason to use.

sometimes its hard to here tones over the intraweb

[GrimmSpeed]

so wait? this is JUST a stock engine +open ECU tune? No gaskets/Spacers/Pipes of any sort?


yeah..i havent touched any power stuff yet. purely stock with a tune.

[GrimmSpeed]

Sorry guys i made a mistake with the stock vs. stg1 graph. i had the weights wrong for my car. i thought my tuner was in the car for the log i was using but he was not. The numbers seemed a bit high to me originally which is why i was investigating.

We still made 16hp and 17tq which i think is pretty good.

I've updated the first post with the correct info.

Justin

[the_wrath_of_Khan]

oh no..i wasnt saying that in a nasty tone...i was actually asking ya if you agreed that that was a good reason to use.

sometimes its hard to here tones over the intraweb
I do think there should be some sort of correction for that massive temperature change, but I don't know how you could properly measure it because a 55* F drop in ambient temperature doesn't result in linear change in post intercooler temperature. Also you are going to have people talking **** if they see SAE correction on your turbo car. If I were you I would just post the ambient temps when you post the dynos.

[the_wrath_of_Khan]

Sorry guys i made a mistake with the stock vs. stg1 graph. i had the weights wrong for my car. i thought my tuner was in the car for the log i was using but he was not. The numbers seemed a bit high to me originally which is why i was investigating.

We still made 16hp and 17tq which i think is pretty good.

I've updated the first post with the correct info.

Justin
Still a very nice gain.

[GrimmSpeed]

so i got the TBE exhaust on this past week and did some tuning. i'm not sure what brand the downpipe is, but the catback is megan racing(not my first choice but it was laying in the shop).

i finally got a new wideband too so i could see what was up with the fuel. it was running a bit rich. it was around mid-high 9s :)

So here is the stock w/ tune VS TBE w/tune graph. Again, using on same road as before, nice perfectly flat road by a corn field. Gains were 13HP and 27TQ. the hp number is what i expected but that tq number really jumped up alot more than expected.

http://www.grimmspeed.com/Dynos/project_l/STG1_tune_only_vs_TBE_with_tune.jpg

I have some 750cc injectors coming that i'm putting in soon here too. They arent going to help us now but once we get our ewg kit on then we will really need them for keeping the boost cruising up top. Also our up pipe will be going on next as well w00t.

Justin

[409industries]

Those torque numbers are impressive! Nice work. cant wait until the UP is in there.

[GrimmSpeed]

yeah aaron, the car is soo slight and jumpy compared to teh wrx with the same stuff. i'm loving it so far.

[the_wrath_of_Khan]

What software is that you are using for the HP calculations?

[GrimmSpeed]

dataloglab.com

[GrimmSpeed]

Well i was hoping today to get a good comparison of the real life gains of adding the GrimmSpeed Up Pipe to your car but i failed...we changed too much at one time and the gains i believe are much more than what the average gains of putting our up pipe on your car would be and i dont want to show gains that wouldnt exist for you guys.

What i did was finally get my wideband hooked up so we could lean it out a bit from being overly rich and i replaced the stock cat'd up pipe with our catless up pipe.

Original dyno had an afr of about 9.8:1 and the new one has an afr of 10.8:1.

With the original tune boost hit a peak of 17.0 and with the new tune we are hitting 17.5...so boost was raised a little bit.

I wanted to note a few dynos ago i tightened the wastegate arm a few turns...thats how i'm able to hold this much boost with the stock wastegate. if you are having trouble hitting higher boosts i suggest giving the wastegate arm a couple turns to shorten it up a bit.


Gains are 19hp and 18tq with the leaner tune and adding the grimmspeed up pipe.
Because i think these numbers are definitely high for a person that would be just adding an up pipe to a stg2 car i will be taking the up pipe off and putting the stocker back on then taking some more pulls and then hopefully we can get a better comparison of stock up vs. grimmspeed up. But nonetheless this dyno shows the gains of leaning out the tune and adding the up pipe.


http://www.grimmspeed.com/Dynos/project_l/TBE_9.8_1_AFR_Tune_VS_TBE_GrimmSpeed_Up_10_8_AFR_T une.jpg


The car is definitely opening up a ton. I can easily tell the difference between this 2800lb impreza stg2 w/ tune VS. the 3300lb wrx stg 2 w/tune. Its amazing how much the weight difference really makes.

and on that note i decided to play with the dyno software to see what the dyno would look like if you implanted my exact engine/tune from the 2810lb impreza L and put it in a 3200 WRX. these results are pretty cool imo...i knew weight made a difference but its crazy to see it on paper.

http://www.grimmspeed.com/Dynos/project_l/3200lb_wrx_vs_2810lb_impreza_same_setup.jpg

better go hunting for some stg2 wrx's muahhahaha
Justin