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This will be the first vehicle we’ve ever had that will have a turbo. And until I actually sit and drive it I’m under the assumption that I’ll want more power than it currently has. Does anyone know how difficult or easy it will be to “upgrade” the turbo, or whatever you have to do, to give the Ascent more HP?
 

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Sorry, I should probably add we’re not looking for 500 hp or anything. Just something easy and safe for the other stock engine components, maybe an extra 100 hp or so? Would this be easily accomplished?
 

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Sorry, I should probably add we’re not looking for 500 hp or anything. Just something easy and safe for the other stock engine components, maybe an extra 100 hp or so? Would this be easily accomplished?
No. It’s more involved than a simple turbo swap. There is a lot of tuning involved for the various computer maps for boost, fuel injectors, ignition timing, etc. I expect to see chip tuning for the stock turbo but don’t know how much demand there will be for full-on turbo swaps for a vehicle like the Ascent.
 

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Think of it this way. Lots of engineers with computers drove it all over heck and back figuring out the best tune and power combo that doesnt result in issues be it transmission, heat, cooling system, fuel consumption and fuel type etc.

If you think its easy to just bump power another 100hp don’t you think they would have?

No its not easy.

As for power my Sequoia is 280 its no doubt heavier than the Ascent. It has plenty of power with 5 fixed gears. The cvt with 260hp of Torquey power will be decent. Will it be like the Explorer 3.5 400hp ridiculous soccer wagon? No.
 

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This will be the first vehicle we’ve ever had that will have a turbo. And until I actually sit and drive it I’m under the assumption that I’ll want more power than it currently has. Does anyone know how difficult or easy it will be to “upgrade” the turbo, or whatever you have to do, to give the Ascent more HP?

I'm a bit worried about this as well but as someone who owned a 2002 WRX that weighted 3,100 lbs and had a 2.0 liter turbo with 227HP it still felt like a rocket ship. Now I did have a manual but I can't tell you how many people were shocked at how fast it was. I never did any mods because it was leased but I could easily keep up with Boxsters and any of the BMW 3 series not labeled with an M.


Now the Ascent will be around 1,000 lbs heavier but will also have a 2.4 liter and around 260HP and 280 torque. The bigger question for me will be the CVT and how good it is at putting the power to the wheels!

No. It’s more involved than a simple turbo swap. There is a lot of tuning involved for the various computer maps for boost, fuel injectors, ignition timing, etc. I expect to see chip tuning for the stock turbo but don’t know how much demand there will be for full-on turbo swaps for a vehicle like the Ascent.
I agree not sure this will have a lot of demand but you never know. Some people that had a WRX but have a family now might be in the market to want tuning as was done before.
 

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Discussion Starter #9
Think of it this way. Lots of engineers with computers drove it all over heck and back figuring out the best tune and power combo that doesnt result in issues be it transmission, heat, cooling system, fuel consumption and fuel type etc.

If you think its easy to just bump power another 100hp don’t you think they would have?

No its not easy.

As for power my Sequoia is 280 its no doubt heavier than the Ascent. It has plenty of power with 5 fixed gears. The cvt with 260hp of Torquey power will be decent. Will it be like the Explorer 3.5 400hp ridiculous soccer wagon? No.
With the resources and tuning support we currently have, it's simple to add another 100hp with e85/ tuning/ supporting mods. Modding the Ascent won't be much different than modding a FA20 WRX.


Not sure if you're familiar with the tuning industry...
 

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Are there things that can be done to improve the performance now (& maintain warranty) or do they have to wait until the car is out of warranty ? I have come across terms like “Cobb tuning” .....what is that & is it warranty friendly?
Is a “cat back” exhaust something that may apply to the Subaru turbo for a performance improvement? Sorry if these questions but I am neither a Subaru person nor any automotive/mechanical person....
 

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Pretty much everything you do (being very broad and general) to the car outside the dealer, will void warranty.

The Cobb tuning you're referring to is more than likely the Cobb Accessport. It's an off the shelf tuning system that you can plug into your car to change to a more aggressive tuning map. Tuners can also use it to custom tune your car. This will definitely void your warranty. ;)
 

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Pretty much everything you do (being very broad and general) to the car outside the dealer, will void warranty.

The Cobb tuning you're referring to is more than likely the Cobb Accessport. It's an off the shelf tuning system that you can plug into your car to change to a more aggressive tuning map. Tuners can also use it to custom tune your car. This will definitely void your warranty. ;)
Technically... yes... although I believe you can always "revert back to the stock ECU map" prior to bringing it back in to the dealer for repairs... :devil:
 

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Technically... yes... although I believe you can always "revert back to the stock ECU map" prior to bringing it back in to the dealer for repairs... :devil:
This is true. Just have to make sure you have all the stock parts to put back on too.
 

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Discussion Starter #14
With the new ECUs, the dealer can see if it was flashed or not. It will void powertrain warranty.

If you can re build these engines, you shouldn't worry. The tranny are still new so parts may not be available. I wonder if this is the WRX tranny they used. Not sure how many different CVT trans Subaru has....
 

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I think the CVT is one that they had in other vehicles but it has been beefed up so it can handle the weight of the car and towing.


Here is a quote from https://www.cars.com/articles/2019-subaru-ascent-poised-to-rise-to-the-top-of-three-row-suv-class-1420698108554/


"Powering the Ascent is a new 260-horsepower, turbocharged 2.4-liter four-cylinder engine paired with an updated version of Subaru's continuously variable automatic transmission. The new CVT features an eight-speed manual mode with steering-wheel paddle shifters."
 

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No one's even had to chance to drive it yet and people are already talking about 100hp mods aha. I wouldn't want to do anything that could impact the warranty, so I think an exhaust and intake is probably a safe place to start. Curious to see how this new CVT is going to perform in such a large vehicle.
 

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Discussion Starter #18
No one's even had to chance to drive it yet and people are already talking about 100hp mods aha. I wouldn't want to do anything that could impact the warranty, so I think an exhaust and intake is probably a safe place to start. Curious to see how this new CVT is going to perform in such a large vehicle.
Intake and catback don't do much for performance on a turbo application. The gains are best from a catless exhaust system, up the boost with increase fuel capacity and better intercooler should the stock not be enough to cool the extra boost.
 

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No one's even had to chance to drive it yet and people are already talking about 100hp mods aha. I wouldn't want to do anything that could impact the warranty, so I think an exhaust and intake is probably a safe place to start. Curious to see how this new CVT is going to perform in such a large vehicle.
It's never too early to think about adding more power! ;-P
 

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Are there things that can be done to improve the performance now (& maintain warranty) or do they have to wait until the car is out of warranty ? I have come across terms like “Cobb tuning” .....what is that & is it warranty friendly?
Is a “cat back” exhaust something that may apply to the Subaru turbo for a performance improvement? Sorry if these questions but I am neither a Subaru person nor any automotive/mechanical person....


Cobbs are a great device to help tune the care to run better and also to help with MPG and watching parameters.


Although to answer your questions, Cobb will not void warranty for lets say a tie rod, but it will if you blow the car up. As someone has stated before you can take it back to stock, but Subaru has gotten a little tricky with learning that you have changed things with the mapping even after reverting it back to stock. So therefore its a gamble some dealers care some dealers don't care so you really just need to talk to a service person and get a honest answer.


As for the catback sound no power.


Also just Google Cobb Accessport and look around on their website for more info, if we were talking wrx's I would suggest that you go to a tuner and not use Cobbs base maps but we are not and I am sure they will have something for the Ascent but what and when is a crap shoot.
 
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