0.84-0.86 lambda isn't considered too lean by your tuner? That seems very aggressive to me on a turbo car.

 

This is true... But not unheard of. I have seen other turbo engines (4G63) in the DFW area running similar lambdas on our local pump gas with no ill effects. Mine is setup for .78ish though .

 

Harvey's dyno dynamics reads really low and does not use a full correction factor since you are at elevation.

Your number on a dyno jet at sea level would be most likely around 600+WHP.

Not an apples to apples comparison.

Great numbers OP!

-Mitch

 

No, the logs show EGT well within spec and the cylinder timing retard is very low, so the engine is responding well..

 

Thanks for the explanation Mitch!


I still can only post my results if one ask. That's why I stated that I am at altitude.

 

Very plausible. That's really where it "should" be in terms of E10 93 octane pump gas around here. I wouldn't call that "safe", but the 997 ECU/DME is so sensitive in the knock control department even if you do get a bad tank of gas it still probably wouldn't ever hurt anything.

 

So I took the car back for another dyno session this morning. See post #1 for a list of my mods. In addition to those mods in post 1, I have since added:

- Do88 inlet pipes
- UMW tune revision3 (allows slightly higher load values with a few other minor tweaks)
- In addition, for this dyno session, 5 gallons of 100 octane on top of 7 gallons 94 octane.

Same dyno, same dyno operator, same WCF, same IATs at start of pulls (~28C), same setup across the board.

Result was a peak 15HP increase with a 5 TQ peak increase. New numbers are 535awhp and 587awtq.

Peak boost was 1.42bar, lambdas look good, timing retard at full boost was negligible.

I printed the graph with the same filtering applied as my last runs in Jan:



I’ve learned a lot about the Mustang dynos during these sessions.. I figured out (with the help of Google and some trial & error) how to take the raw data files created by the dyno (.TRB files) and use them to create an export of the tables. Mustang provides their dyno software for free on their website (demo only mode) but it DOES allow you to load up your data files and print out whatever the actual operator can do.. apply different filtering levels, graph smoothing, etc. etc. It’s actually pretty cool.. I should probably do a post on how to do this in the future for those who run their cars on Mustang’s..

This allowed me to take the dyno graph and add datapoints in my datalogger data to show TQ numbers vs RPM & load:



So how does this translate to on-the-street times? I’m not too interested in drag racing this car, but I have managed to collect a few vbox runs recently:

60-100mph (3.27s) and 100-200kph (6.63s)

Short of switching to E85, I’m probably at the limit of what I'm comfortabe doing with this car without switching turbos.. Hmmm.

 

Jumping in here - was a previous dyno run on premium gas vs. another at E85?

E85 makes less power with a similar tune, but allows for more boost due to its high octane rating.

btw, what is the accepted hp loss, crank to wheels (all 4) for the 997/991?

 

No, my tune is pumpgas only, previous dyno was on 93octane.

I've heard anywhere from 15 to 25%. No idea what it really is.

 

Hi, not to highjack this thread at all, but I am curious if any of you have used a Mainline DynoLog Chassis Dyno (AWD)?

I had my car on a MainLine Chassis Dyno last fall with even more mods than Saabin (on 91 octane though) and my numbers are considerably lower both with TQ & HP.

I have an 09 6MT. Looks like they took my car up to 5,022 rpm's in third gear TQ = 460.5 and 501 HP at 6,167 rpm's. I was kind of bummed when I saw my numbers compared to what others have posted with similar mods? I hear that Mainline Dyno’s have been known to make grown men cry…

 

Did you retune for the race gas or was the dyno pull with a 93 octane tune with some race gas just added?

 

All my pulls were in 4th gear.

I wouldn't get too hung up on the actual numbers themselves, I was mostly interested in the deltas from my first run..

I've learned playing with the dyno software that there are ways to "help" adjust the numbers in your favor.. Just by changing the filtering level on my printout from 1 to something above 50 results in a 6HP difference. The weather Correction Factor (WCF) can have up to a 10% effect on the numbers.. A dyno shop could put the weather station in direct sunlight (or worse, override the temperature and/or RH, which I'm not sure if it is possible with the Mustang) and viola, better numbers!

In my case my uncorrected numbers showed the same delta, so I felt that was good.


No, it wasnt a race gas tune, just a pumpgas revision that allowed sligtly more load. Looking at my logs showed a reduction in timing retard during the pull.

 

Over 500AWHP from 4400rpm to 6200rpm must feel nice. Enjoy it!

 

Thanks for the reply Saabinb!

 

Congrats Saabin! Very nice numbers and great details.