[Cheekyboy21]

Hi guys,

I have Caliber 2007 Cvt.

And i swapped my cvt transmission to a manual transmission for 1.8 Engine with the ecu.

Everything going alright.car is working gear is shiftting.

But the problem is on the 3rd gear the car does'nt go that fast as 1st n 2nd.

I discaver this issua when i was racing some cars.

1st and 2nd gear everything is good when i shift to the 3rd the cars which i race they

passed me,like im not putting my foot on the gas.and some of them on the 3rd They come next to me after i was faster than them on the 1st n 2nd.

Looking for some help from you guys

Thanks

 

[Francois]

Well first time I read that you finally have done it.

If this Mod was completed yesterday, so I guess it was your birthday present

Happy birthday by the way oze:

I'll be following the thread to see advices from the knowledgeable members, as I'm not qualified for it :kap:

Thanks for sharing the news! :smiley_thumbs_up:

 

[DKazoroski]

On many small cars, first and second gears have ratios for fast acceleration, but poor fuel economy and high engine RPM's
When you get to third and fourth gear, the gear ratios are more for cruising. They give better fuel economy and lower engine RPM's.
Fifth gear is an "overdrive" gear. It gives the lowest engine RPM and maximum fuel economy at highway speeds.

Fixed gear ratios are always a compromise, each of the gears is ratioed to be the best for a specific purpose.

1st - power to "get off the line"
2nd - power to get up to speed
3rd - lower speed cruising
4th - normal speed cruising
5th - high speed cruising on level ground.

To some extent, the CVT can overcome these issues by automatically selecting a "perfect" ratio for the driving conditions at hand.

Also a couple of other factors - the Caliber's engine is small and of reasonable, but limited power. And, it takes a lot of practice and experience to get the most out of a stick shift transmission - there is a "knack" to shifting gears.

 

[LOUDERMAN]

Dave pretty much nailed it, but when I hit third I still have better pick-up than a CVT caliber. If you really want to pull harder in third gear, you need to really windup in second. If I'm flooring it, I usually shift just before the rev-limiter kicks in. Gatta remember that a 1.8L 5 speed still isn't a race car.

 

[DKazoroski]

Actually, I've heard several Patriot and Compass owners say that 5th gear is pretty much useless - gotta downshift for even the smallest hill.

Most of the issue is related to the high RPM required by our engines in order to produce any torque. If you really want maximum acceleration, you need to keep the engine between the torque peak and horsepower peak. That's between about 5500 and 6500 RPM (yikes!!!) - definitely not conducive to long engine life.

Interesting personal experience:

The CVT automatically changes gear ratios as needed to get the best performance.
On a particular hill in the Pocono Mountains that I frequently drive, when going down that hill the engine is running at 1500RPM going up it's running at 3000RPM - in both cases, I'm traveling at 50MPH.
This demonstrates that our engines always need the correct transmission gear ratio to get the performance you need. They probably are a little too fussy in this regard.

 

[LOUDERMAN]

5th gear is an overdrive cruise gear, so I'd expect to shift out of gear going up some hills. And Dave is right again, you REALLY have to keep the RPMs at the top end on a 1.8L engine if you want to go fast. Thats part of the reason I just rev my engine next to rice cars, and then let them take off.

I won't win anyway, and they get a ticket from the cop they didn't see!

 

[RSQCali]

Congrats on replacing the tranny. please tell us what parts you needed and how you did it. Sometime in the future i might want to try that project. and many others would probably like to know too. A good How-To would be amazing

 

[LOUDERMAN]

It would be a great read that's for sure.

 

[DKazoroski]

Thats part of the reason I just rev my engine next to rice cars, and then let them take off.

Around here, most of the "ricers" are all show and no go, driven by drivers that have no skill with a stick. (but their "fart cannons" sure are LOUD!! - really advertises their incompetent shifting!!)
I can get so far ahead of them from light to light, and I don't even break the speed limit!

 

[DKazoroski]

Congrats on replacing the tranny. please tell us what parts you needed and how you did it. Sometime in the future i might want to try that project. and many others would probably like to know too. A good How-To would be amazing

With all due respect, and in all honesty - this conversion will be more pain than gain.
If you really want a car with a stick - you'd be better trading in for one!

(tranny, clutch, clutch hydraulics, master cylinder, new PCM, a bunch of hardware and knowhow to put it together)

 

[LOUDERMAN]

Most rice cars are all show and no go. My car is pretty much the same, the only difference between me and them is I know my car isn't fast!

 

[Cheekyboy21]

Well first time I read that you finally have done it.

If this Mod was completed yesterday, so I guess it was your birthday present

Happy birthday by the way oze:

I'll be following the thread to see advices from the knowledgeable members, as I'm not qualified for it :kap:

Thanks for sharing the news! :smiley_thumbs_up:

Thank you very much ...that so kind of you

Actually i done it long time ago.

 

[Cheekyboy21]

Dave pretty much nailed it, but when I hit third I still have better pick-up than a CVT caliber. If you really want to pull harder in third gear, you need to really windup in second. If I'm flooring it, I usually shift just before the rev-limiter kicks in. Gatta remember that a 1.8L 5 speed still isn't a race car.

My Caliber is 2.0L,and i already modified ( magnaflow exhaust,filtter K&N, 50 shot nitrous )

Even with nitrous im having the same issue.

 

[Cheekyboy21]

Congrats on replacing the tranny. please tell us what parts you needed and how you did it. Sometime in the future i might want to try that project. and many others would probably like to know too. A good How-To would be amazing

Actually our cars is ready to change from Cvt to manual

I just bought the full backage of the gear. ( Ecu , stick , clucht , wires , gearbox ) t
I bought it from crashing caliber with 1.8L Engine and my engine is 2.0L

I tried it with out i change the Ecu,but the car won't go more than 2500 Rpm.

I havn't got any problem on swapping the manual transimssion.you just need to remove the Cvt and then u put the manual.

But there are more wire comes on Cvt transimission so i had to tight and keep it away,coz i dont want to cut it out.

 

[Cheekyboy21]

Dave i like what you are saying,coz i heard from my friend the same.

He also saud that it would be better if you keep the rpm between 5000 to 6500.

I have problem with the clucht disk,do you think it is a reason that makes the 3rd gear not fast,or is it normale problem.

I havn't change the clucht dist but i fix it,coz before i fix it the sound was loud after i fix it the sound became normal with a bit sound.

What do you think if i put big rims like 18" or 19" it will help me with the gear ratio?

 

[DKazoroski]

Bigger rims will make the car accelerate slower, but move faster for a given engine RPM and gear ratio.
The larger the wheel diameter, the lower the tractive effort for a given amount of torque applied to the wheel. (tractive effort = applied torque FT-Lbs / Radius of wheel)
The lower the tractive effort, the lower the accelerating force (A=F/M).
Best to stick with the stock size tires and rims for now.

RPM - do not hold it at such high RPM's - you'll kill the engine quickly. Even though the redline is high (6500 RPM) the engine cannot run continuously at much more than 3000 RPM for long periods of time.

You'll need to look further into the clutch to see if there is a problem, but if it was slipping, you'd smell it for sure.

And finally, remember - a 2 liter engine is small, and it can only give so much.

 

[Cheekyboy21]

Bigger rims will make the car accelerate slower, but move faster for a given engine RPM and gear ratio.
The larger the wheel diameter, the lower the tractive effort for a given amount of torque applied to the wheel. (tractive effort = applied torque FT-Lbs / Radius of wheel)
The lower the tractive effort, the lower the accelerating force (A=F/M).
Best to stick with the stock size tires and rims for now.

RPM - do not hold it at such high RPM's - you'll kill the engine quickly. Even though the redline is high (6500 RPM) the engine cannot run continuously at much more than 3000 RPM for long periods of time.

You'll need to look further into the clutch to see if there is a problem, but if it was slipping, you'd smell it for sure.

And finally, remember - a 2 liter engine is small, and it can only give so much.

Right now i heard sound from the clucht ,and when i race i actually smell it,likes its burn.

Does it makes the power lower or is it normale if the clucht having problem.

 

[DKazoroski]

If the clutch is slipping, you are losing power in the clutch.
The lost power is being turned into heat and burning up the clutch.

 

[Cheekyboy21]

If the clutch is slipping, you are losing power in the clutch.
The lost power is being turned into heat and burning up the clutch.

So i guess i better change it and then judge about the speed of the car.

I hope this is my last problem.

Coz even with nitrous it has no power on 3rd .. Thats make me crazy :shakehead:

 

[DKazoroski]

Out of curiosity:

What class of vehicles are you racing against?
(engine size, vehicle weight)