Cheetah Powervalve vs. Cheetah Cub

[Handyman]

This is something I have been wondering now that I have my P.V. motor out together... In an all out race with and the riders were same height, weight, etc....and the conditions were identical...which engine would be the faster of the 2? Why does it seem that cubs are favored more than powervavles...price?? maintanence reasons?? etc.. I'm bored at work and thought I would ask.

[06BaNsHeE]

I think more people choose a cub over P.V because they are way cheaper.My builder told me to just gow with the cub becaus eit is alot cheaper.But Ive seen a 10mm 535 cheetah P.V. and I was scared to ride in the back of that thing.Im going to to race my 7mm and see how I keep up with it.

[Washburn]

Is it the same thing one has PVs one doesnt? How much are the Cheetah PVs? The power valves would give it more bottom (haha) and smooth out the powerband for a few extra ponys for extra shifting power I want to say. I though the Cheetah cubs all had power valves how much more are they and Link please?

[Handyman]

The cubs and PV's have the same bore. The cubs don't have the Powervalve. I think Trinityracing has the powervalves for sale, not sure though,,

[djackbanshee]

Powervalve Cheetah,s have lot'of things over he cub

(different heald bolt patterne)(Bigger domes)(Better cooling jackets)(O-rings are on the cylinder , not the head)(Powervalves)(Big Trx 250r reeds) That's why they are more xpensive .

[Handyman]

Now that we figured out the difference between the 2......

 

 

Which is faster??? I'm starting to think that the PV motor is faster.

[blaster668]

The PV motor will definately be faster. Power valves are great, they give an engine builder more room to work with regarding exhaust port timing, because in effect the powervalve offers variable exhaust timing. Basically, if the cub and pv cylinders are set up identical when the pv is open, they will produce the same peak HP....but the PV will have a lot broader of a power curve. Lots more bottom end and more area under the curve....which translates into faster.

 

But the PV can be set up with even more aggressive exhaust timing and still have good bottom and midrange and even more top end power.

 

People buy the cub because it is much cheaper, and gives MOST of the power that the PV cylinders do.

[gipperz]

I would think the p.v. motor would be faster only due to being a smoother power output which would result in better traction. I would think both motors would have the same peak hp. I would think a p.v. has a torque increase in the low range which would help in acceleration. Just my thoughts, I could be wrong. :shrug:

[djackbanshee]

I would think the p.v. motor would be faster only due to being a smoother power output which would result in better traction. I would think both motors would have the same peak hp. I would think a p.v. has a torque increase in the low range which would help in acceleration. Just my thoughts, I could be wrong. :shrug:

 

 

Are you forgetting the cheetah has BIG REEDS which the cub has not ...............

[djackbanshee]

[gipperz]

Are you forgetting the cheetah has BIG REEDS which the cub has not ...............

OOOOOPs, yes I did, I was just giving it some thought. So....who does have the answer? I'm wondering myself, is it really worth the extra money for the p.v. ?

[Handyman]

That is a good point. The cub uses stock type banshee reeds where as the P.V. uses CR250/TRX250 reeds and reeds valve.

[blueshee03]

the biggest factor in my oppinion in any race is the riders riding abiltitys and the chassis setup. at the drags we run 500 ft dirt there is a couple big cheetahs that run. bkabina has a 4 mill cub and it will run right with them and has ran better et's than they have many times. i won't really say that the cub is faster all around than the big cheetahs but when you consider the cost and the size difference in comparison to the cub and the performance of the cub when properly tuned and setup then the cub is deffinately the way to go.oh also b's cub is in a stock chassis and he weighs 240 pds where as the cheetahs are in lonestar chassis and the riders only weigh between 140 to 175 pds.

[dawarriorman]

the biggest factor in my oppinion in any race is the riders riding abiltitys and the chassis setup. at the drags we run 500 ft dirt there is a couple big cheetahs that run. bkabina has a 4 mill cub and it will run right with them and has ran better et's than they have many times. i won't really say that the cub is faster all around than the big cheetahs but when you consider the cost and the size difference in comparison to the cub and the performance of the cub when properly tuned and setup then the cub is deffinately the way to go.oh also b's cub is in a stock chassis and he weighs 240 pds where as the cheetahs are in lonestar chassis and the riders only weigh between 140 to 175 pds.

Exactly.

 

The cub is cheaper and easier, which leaves more money and time for getting the shee set up properly. That makes more of a difference than hp alone. Horsepower is only part of the equation, if your drivetrain and chassis aren't setup right, and the engine isn't tuned right, and the rider doesn't know what he's doing, then the cheetah will lose every time.

 

If you have money to spare, go with the cheetah, if not then go with the cub. Thats the difference you should be looking at, not which one makes more hp.

[Animalman294]

Wasn't that one of the reason's they designed the Cub was because it was a cheaper alternative to the full blown Cheetah? And the Cub's take all the stock parts and saves money on buying all new parts. They put out comparable power levels if set-up correctly, and tuned right. The Cubs are about 1/2 to 2/3 the cost of the PV................