Hey,
In one of my manuals it makes refrence and has skematics for a Constaintly Variable Transmission which appeared in the CRV. I know they didn't come in Canada, so I'd assumed it was a United States only thing. Anyone know anything about this? If it does, has anyone tried to use it as a performance upgrade?

 

This type of tranny may not yeild any performance gains since you won't be doing any of the shifting.

 

I've wondered about this myself. I drove an Audi A4 with a CVT and began thinking about what would happen with a boosted honda... if you could have a "sport mode" that would hold you at a certain RPMs after full boost has been attained. No shifting errors, no time spent. Sounds like an awesome idea to me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1Chance &raquo;</TD></TR><TR><TD CLASS="quote">This type of tranny may not yeild any performance gains since you won't be doing any of the shifting.</TD></TR></TABLE>
I beg to differ, the only reason we have a transmission is because our cars only have a certain (relitavely narrow) powerband, with a specific power peak (torque peak). If our engine could be at that torque peak indefinitely and the transmission could adjust accordingly (instead of the engine, as is the standard with automatic and manual trannies) your car would be incredibly fast.
The main thing I am trying to find out is does this tranny exist right now?

 

The cvt does exist. But not on the crv. It was used on the econo cars. I know it was used on the jdm d15b with vtec-II

 

It actually came in some cars here, but only in the Civic not the CRV. The tranny is actually really cool if it could hold the power. Ever drive one of these cars its really cool. You floor it off the line. Tach goes to red line and you just keep accelerating never shifts just keeps getting faster.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -KangaRod- &raquo;</TD></TR><TR><TD CLASS="quote">
I beg to differ, the only reason we have a transmission is because our cars only have a certain (relitavely narrow) powerband, with a specific power peak (torque peak). If our engine could be at that torque peak indefinitely and the transmission could adjust accordingly (instead of the engine, as is the standard with automatic and manual trannies) your car would be incredibly fast.
The main thing I am trying to find out is does this tranny exist right now?</TD></TR></TABLE>

Yup..

 

When you say civic they usually come with D series. Any b-series trannies.

 

no b series, and honda hasnt made one that handles decent power yet

 

I think that the CVT is only used on the cars with hybrid motors. I'm almost positive that it's never been used on any cars with b-series engines.

 

cvt transmissions are not that strong when audi made there new one it was a big deal cuz it could handle 220 hp and have a top speed of 130 or so

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C_tech97GSR &raquo;</TD></TR><TR><TD CLASS="quote">I've wondered about this myself. I drove an Audi A4 with a CVT and began thinking about what would happen with a boosted honda... if you could have a "sport mode" that would hold you at a certain RPMs after full boost has been attained. No shifting errors, no time spent. Sounds like an awesome idea to me.</TD></TR></TABLE>

what was it like driving a car with cvt a cant seem to get the concept does it feel like it had gears, just one continous gear or what, I know it is something like unlimited gear ratios or somethin, but i can't get the idea of how it drives , thx

 

It feels almost exactly like a conventional auto. It has a "manual" shift gate like a tiptronic, but the shifts feel a bit quicker. Overall, it actually does accelerate faster than a conventional auto. I think it's rated at 220hp or something. It's not as fast as the manual though.

I just think that CVT would be a cool idea for engines with a narrow peak power band like turbocharged 4-cylinders. If it could hold the power, obviously.

 

I\When i sued to work at BMW and worked on minis they had a CVT for an auto tranny and motoring around corners and FWY onramps in those thgisn was a great tiem becasue you are alwasy in your powerband. SO yes great idea and to verify they came in the civic HX 96-00 and the big problem is will it hold the power

 

thx man, the cvt would be good if it can stay in the power band, these are prolly some of the trannys of the future and the sequential manual i would like to drive a seguential gearbox to see how that would be.

 

everyone seems to be speaking as though if this tranny could stay in the powerband, that is what it does better than any tranny in the world.
Its like a snowmobile, the engine doesn't rev up, but the sled keeps pulling hard. Its a neat feeling.

 

Oh yeah! I forgot that the Civic HX had that as an option... that would be a D-series. I wonder if anyone has tried using one of those with a built/turboed EX sohc vtec motor. I forget... D16y8 or something like that.

That would make a cool relatively cheap project.

 

yeah i agree i know the auto CVT varies significantly in design from a conventional auto, for the simple fact of looking at pcitures it looks wway more complicated. I can rebuild an auto tranny to be pretty damn buff and its easier then a manual however cvt i havent had a chance to dissasemble yet