Its amazing what an actual pro tune makes over stock and even ots maps. Although, those numbers there seems to be on the high side for a stage 1 car.

 

Nice numbers. I too just added the cobb 93 stage one ots with a AEM dry flow filter. Car runs a lot better versus stock.

Dynomite’s generally read higher than Dynojets btw.

 

Nice gains but yeah, those numbers more like a stage 2 protune with a downpipe, etc.... a high reading Dyno. After almost 15 years and 3 STis, I don’t get too hung up on numbers though. Just got a stage 1 pro tune on my 2020 and picked up about 40whp/20 wtq. Feels good and will hold me over until I decide to get my flexfuel kit and the rest of the leftover parts from my 11 installed with a turbo upgrade

 

Agreed, those numbers are a bit high. The gains are good, though peaky torque. I spend a decent amount of time on that type of dyno and calibration is huge on it. Here is a 2020 STi (I know it says 2018) I did not too long ago, which is stage 2. It also has snow tires on, which will rob power numbers on the dyno.


The two graphs are my initial e-tune vs dyno... No pre-dyno was done.

 

Agreed, those numbers are a bit high. The gains are good, though peaky torque. I spend a decent amount of time on that type of dyno and calibration is huge on it. Here is a 2020 STi (I know it says 2018) I did not too long ago, which is stage 2. It also has snow tires on, which will rob power numbers on the dyno.


The two graphs are my initial e-tune vs dyno... No pre-dyno was done.

View attachment 62068

Just curious, how much of a loss have you seen on dyno sessions with cars running snow/winter tires? Im sure it would also come down to the actaual tire as well. Have you noticed a differenace between cars running a big tread block snow tire like a blizzak compared to a car running a performance winter tire?

Just curious on findings, not to much info on this.

 

IIRC, on a setup such as this, it's ~20whp loss. Another thing to consider is altitude. Sure, it does have corrections on the dyno, however, it cannot correct for a turbo running out of steam. If you took the same car and dyno and dropped it 5k feet, the turbo will be much more efficient and it will show in the numbers.

I generally don't get too many cars on the dyno with snow tires as most of the cars I do are nice weather toys or race cars.

 

IIRC, on a setup such as this, it's ~20whp loss. Another thing to consider is altitude. Sure, it does have corrections on the dyno, however, it cannot correct for a turbo running out of steam. If you took the same car and dyno and dropped it 5k feet, the turbo will be much more efficient and it will show in the numbers.

I generally don't get too many cars on the dyno with snow tires as most of the cars I do are nice weather toys or race cars.

Wow, thats actually a pretty decent loss. Im curious though, if the car would have summer tires on during the session, wouldnt that be a problem too? Given the fact that the summer tires may not grip well in the cold, wouldnt that cause some kind of slippage under load and lead to lower numbers?

 

Not at this power level.

 

For reference, mine has the stock summer tires on it and is in MD where we're at like ~350ft.

Edit: P.S. Whatever the true numbers are it's 100% better than it was stock. Good enough to prevent me from spending all my money going stg 3 😅 And the car is running great so far. For those not looking to go too far down the rabbit hole right now, I wouldn't hesitate to say the intake and tune is worth every penny. But I might be slightly biased by also having done engine mounts, tranny mounts, and some other items all at the same time.

 

For reference, mine has the stock summer tires on it and is in MD where we're at like ~350ft.

Edit: P.S. Whatever the true numbers are it's 100% better than it was stock. Good enough to prevent me from spending all my money going stg 3 😅 And the car is running great so far. For those not looking to go too far down the rabbit hole right now, I wouldn't hesitate to say the intake and tune is worth every penny. But I might be slightly biased by also having done engine mounts, tranny mounts, and some other items all at the same time.

Those are some famous last words. I said that too....then I did a turbo and supporting mods...then I went closed deck with another turbo, etc, etc.

Regardless, a protuned stock car is leaps and bounds better than what comes from the factory, HP gains are just an added benefit at that point.

 

I said I'd only do OTS stage 2 when I bought mine...

 

I said I wasn't going to do anything but a suspension and ended up getting rid of the suspension and went stage 2. Stage 1 is a great mod over stock and highly recommended. Stage 2 isn't necessary but it does wake the car up just a bit more than stage 1.

So is this a stage one or 1+ dyno sheet? Did you dyno with SF or stock intake?

The cobb SF intake is considered a stock replacement. Very little gains, just improves airflow and turbulence but it can be installed without a tune. Only the cobb and SPT I believe can do this. All others mess with the numbers/readings.

Stage 1 is just a tune.
Stage 2 is an upgraded downpipe + tune

 

Only thing that would affect power on the car right now is a Cobb SF intake.

So is this a stage one or 1+ dyno sheet? Did you dyno with SF or stock intake?

 

While I agree that the difference from start to finish is where it is at, you can get a pretty good idea of what a car should put down on a certain dyno. DynoJet is probably the most consistent as it's a 3,000lbs drum and nothing for you to mess with as an operator. This is the same reason that all the sanctioned racing bodies want a DynoJet dyno graph for classing. The dyno in the thread can be messed with to inflate numbers... The one I use regularly did a bunch of testing on cars with 'known' numbers to dial in where their dyno should set. What I have found with this specific dyno is the consistency is great between cars. The dyno I dislike the most in consistency is a Mustang. You might as well throw a dart on a power number.

They all utilize corrections for what you've stated above. What It can't do is account for a compressors efficiency at a given DA.

 

On 19 up STI, Cobb only has OTS stage 1 (tune only) and stage 1+ (tune and cobb sf intake). Because the 19 up motor changes (intake, exhaust, tune etc.) the stage 2 up OTS is still in development.

Question again, did OP have stock intake or SF intake during dyno test?

 

Here was a stage 2, 2017 STi from yesterday... Tune wasn't really any different than what I posted above, but didn't have snows on. This car didn't like to hold boost, no matter how much WGDC (some are like that, especially at 5k+ ft ASL).

I, S, and S#