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Modifications to get hp in north america

18K views 46 replies 10 participants last post by  RoLleRKoaSTeR  
Changing the wheels to reduce weight will minimally impact the acceleration performance of the car. We're not talking about putting in a lightened flywheel here. The only real advantage with lighter wheels is with unsprung weight in how it affects handling of the car.

The 2.0L engine was never made to be a performance engine. And any attempts to change that will impact the reliability of the engine for little to no gains. If you wanted a faster car, you should have purchased something with a better engine. It's too bad Toyota chose to give us North American customers the shaft with no options that are available to the European market. They at least have a hybrid engine option that gives the car some decent get up and go. Frankly the engine used in the new Corolla Hatchback and the Lexus UX should have been in this car from the beginning. Well, Toyota fixed that problem recently. But they did it by introducing a new model called the Corolla Cross. If I were in the market today, I'd get the Cross over the C-HR hands down.
 
I only mentioned the wheels because there isn't anything else to do to this to add HP except lower weight somehow and since you can't really remove the seats because you need them you'd have to look elsewhere
The weight savings would be minimal to affect the overall acceleration of this car. You'd have to get into some exotic wheels that are extremely light to make any measurable difference which would still be not much. Buying these exotic wheels would not make any financial sense with the resulting performance gain.
 
and BTW, we bought a Cross too, and it's just as sluggish since the heavier weight of the vehicle vs the regular corolla makes it slower
Two different types of vehicles: Cross vs Corolla. Compare the Cross with the C-HR and the Cross would be a speed demon in comparison.
 
What gets me the most is this car was supposed to be branded as a Scion, and their main push was how much you can fix those cars up. I had 4 of them, so I know. Knowing that, the fact that screwed us with this transmission upsets me. But also, knowing that, I didn't by this one to fix up too much. As I posted above, I got me an intake I like, and I'm gonna get me an exhaust that I like, and that'll be about all I do to it. I traded in a Honda Type R for this, so I wasn't expecting a speed demon when I went in to purchase it.
I got this car as it was the only one that fit my budget at the time and the purpose; which is to be a daily beater. Had the Cross been available, I would have opted for the Cross. I wanted to get the Corolla Hatchback. But the trunk is miserably small which was a no go for me. Didn't want to spend the money for a Rav 4.
 
actually the heavier weight of the cross negates the difference in HP so it's basically a push when it comes to acceleration. the C-HR feels a little quicker because its a smaller vehicle
Actually, the engine does make a difference. Numbers don't lie. From Car and Driver's own test. 0 to 60 for the Cross is 9.2 seconds. The best 0 to 60 the C-HR can produce is 10.5 seconds. That's a full 1.3 seconds which is a big difference.

2022 Toyota Corolla Cross Review, Pricing, and Specs (caranddriver.com)
 
but I hear where you're coming from...I'm done with speed, a long time ago actually, the days of the turbo T-bird, the Mustang GTs are LONG gone for the reign of Jeeps I had...so the speed is irrelevant to me. I needed something that gave me more than 15mpg, and I fell in love with the style of the C-HR...

I'm just concentrating on the visuals of the car and leaving the drivetrain stock for best longevity.
It's a total shame that Toyota's management royally screwed up the C-HR. The C-HR is a good setup chassis wise and suspension wise. The handling is really good for what it is. My opinion is based on having done actual track time in both cars and motorcycles. The independent rear suspension contributes a lot to this along with the factory standard Sachs dampers. This car could have been so much more. It requires Toyota minimal effort to include the better engine in the UX, Corolla HB, and Cross into this car. The combination of the better power and the suspension would have made this car unique in the segment. I would wager sales would be even better than it is now. This car will always be a half done car.
 
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I know the numbers but I can only tell you from my experience driving both cars back to back...my C-HR is quicker than the Cross right now...after they are both broken in, that may change, but 1100 miles on the cross, 300 on the C-HR...C-HR has more gusto...and the C-HR has a sport mode, which I don't see the numbers for that...but both these cars are not about sheer power as you know...

it's a shame that people buy them expectting to speed around, especially the C-HR because of the style
Same reviewing source:


They got 11.0 seconds from 0 to 60. I can't find the video where someone ran from a dead stop 0 to 60 in sport mode and got 10.5 seconds. There's a reason why people joke about those that give their impressions about the speed of a particular vehicle as the butt dyno. Again, physics and numbers don't lie. The Cross is faster than the C-HR. Until you time the runs yourself, you can't provide any authoritative comparison. There are many things that go into the "sense" of speed. Road noise, engine noise, vibrations through the chassis....all of these factor in to giving a sense of speed.

As to Sport mode, it does nothing other than make the throttle/gas more sensitive. It's a red herring.

Another thing the Cross will always have over the C-HR is the speed of launching the car at a dead stop. The Cross has a physical first gear in the trans. The C-HR is all CVT which is junk for any type of performance acceleration. You can readily feel this yourself. Stab the gas at a dead stop, there's always a slight delay before the car actually moves. It's the way the CVT works that gives that delay.
 
I looked at the Wikipedia entry and they're wrong on the C-HR. Just going by Toyota's own website, the C-HR is only referenced to having a CVT. The Corolla is listed as having a dynamic shift CVT and the UX is listed as having the direct shift CVT. As to why Toyota chose to change the naming of the trans used in the Corolla versus the UX is beyond me. Same as how Toyota lists the cargo capacity of the Corolla Hatchback as being close the C-HR...which is wrong. Just putting the cars side by side you can tell the cargo capacity of the C-HR is much more than the hatchback.

One thing I seem to be in error of is the trans in the Cross. It appears it uses a full CVT versus the direct shift CVT as indicated by Toyota's website.
 
Would a simple 2.0 l turbo swap from another toyota add more power
No. It's not so simple as just bolting on a turbo. There are a ton of things which need to be done to accommodate a turbo on an engine that wasn't designed for it in the first place. For one, I don't think there is any turbo variant of the 3ZR-FAE engine that is in our cars. This means the internals of the engine are not up to par to deal with the additional cylinder pressures the come with forced induction. The pistons, connecting rods, and crank have to be built to deal with the duties of handling a turbo....possibly the bottom end of the engine block with the main caps too. Oiling has to be updated as the turbo requires engine oil to keep the bearings lubricated. Some systems will also run engine coolant through the turbo to keep the turbo bearings cool. And last but certainly not least, the engine computer has to be updated to support a turbo. This requires tuning on a dyno if the stock computer is able to be programmed with different fuel mappings. This is not even considering the made of glass power handling of the CVT trans we have in the car.

Swapping another engine that has more power isn't a viable option either....even if it has a turbo already from another Toyota. You have to ensure the engine mounts line up. The electronics can be transferred over such as the wiring harnesses and engine computer. You'll most likely need to transfer the transmission. The trans mounts would need to line up with the mounting points in the C-HR engine bay. And all of this has to be able to line up with how the suspension is setup where the axles are going to connect into the transmission.

The only viable engine swap I can see that will add power is the M20A-FKS used in the Lexus UX200 which is essentially a C-HR. This engine should physically just drop in along with the direct shift transmission as that also needs to be moved over. The engine computer and harnesses will have to be moved over. And after all of that is done, you don't know if the engine will run right as there is a tight integration between the engine computer and the rest of the computer modules in the car such as the BCM. All of these systems communicate over the CAN BUS. Even if all of this worked as planned, you're looking at what? Probably near $10k for all the work to get what? An additional 20HP?

As I keep saying and it seems to hurt people's feelings, the C-HR is NOT a performance car. Never was designed that way and never will. Despite the exterior styling alluding to more. If you wanted a performance car, you should have bought one from the beginning. I say this as an old fart that has been through what many of you are looking to do. Had I known what I know now back then, I would have saved myself a ton of money and ended up with a car that would have performed better with the money I had spent.
 
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I'm doing slight improvements, I have AT wheels since I'm in north in woods with New England. will add a lift, new suspension, break system. the cool air intake may be a possible upgrade but I feel it will be worthless. I want my c-hr to look like an off road car and feel like one with a kick up speed. any ideas
Nope. As I said, this engine was never designed for performance nor the car itself. That's why there is not much in terms of performance enhancing parts. A CAI to me is just for looks and to add more induction noise so you can feel you're going faster. There was some aftermarket solenoid for the VVT which did add a couple of HP. For the price they're asking and the amount of power you get, not worth it. The hard truth is this car is an econobox that is styled so it doesn't look so much as an econobox. If you want to add meaningful horsepower without all the hassles of making extensive modifications to the engine/electronics, you can throw on a dry spray nitrous system. But this also is not a free lunch and will probably substantially reduce the life/reliability of your engine/transmission. Dry spray nitrous systems are designed to run when you're at WOT (wide open throttle). So no partial throttle benefits. You also have to have a high pressure tank in your trunk that has to be mounted properly and becomes a potential missile if hit just right. And depending on how much you're on the giggle juice, size of your tank, and the jetting used in the intake spray nozzle, you'll have to plan on visits to the speed shop to have the tank refilled. Oh and after a set number of years, the tank has to be replaced to ensure you're not using a tank that may fail over age.

With all that you're planning on, Joe is correct that you should have purchased something like a 4Runner.
 
Iona, 2019 Toyota, CHR and white it’s a limited model, so it came with leather and all the trim options available in North America. It does lack horsepower and the CVT transmission doesn’t help. However, I did purchase a TRD cold air intake off of ebay.com for a couple hundred and installed it myself in 15 or 20 minutes they say it gives I think 8 to 10 hp I noticed an improvement I’m thinking of adding a duel exhaust next they say it gives an extra 35 hp
Installing an intake for this engine to get a gain of 8 to 10 HP is dubious at best. I'd want to see actual dyno charts to back up that claim. Putting on an exhaust to gain 35 HP is just wishful thinking. There's no way anyone is getting 35 HP out of a naturally aspirated 4 cylinder with just free flowing the exhaust.
 
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