V Force 3s vs 4s... 10mil on the dyno

[EZ2FLEE]

I'm getting off track a bit, but how do the vf2s 3s 4s stack up against ....the boyeson pro " dual stage" the prostocks and the boyeson power

[sheerider11]

Yep. If your running a 465cc or bigger DRAG ONLY machine you can see 1-2 more peak HP from the 2's.

But the 4's will be right there with the 2's. (WAY better than the 3's! ) The 4's also offer a much better front side curve. (Better than the 3's here too) So for those who drag the dunes and are on and off the throttle to stay in control, the 4's would be my pick.

 

On smaller motors, the 4's outshine the 2's across the board. They also make more power than modded 3's. So a stock untouched 4 will make more low/mid/peak than a modded 3.

Also testing showed that on motors under 75HP, modding the 3's actually hurts performance. On 100+HP motors, pulling the stuffers and doing the stuffer mod on the 3's can gain 3-4 HP. But untouched 4's still make more power than the modded 3's.

Woah slow down. I got lost between the 234. I'm not worried about 3s at all. I have 2s right now on a dune ported 4 mil stock cylinder. So if I read correctly, your saying on my small motor the 4s will out perform the 2s top to bottom?

[WINDYCITYJOHN400]

Woah slow down. I got lost between the 234. I'm not worried about 3s at all. I have 2s right now on a dune ported 4 mil stock cylinder. So if I read correctly, your saying on my small motor the 4s will out perform the 2s top to bottom?

 

Yep. The 4's will outperform everything..... with the only exception being wide open throttle drag bikes that keep the RPM's up at peak for most of the track. (Where PEAK power numbers matter more)

 

(You know... the strut/rigid/wheelie bar bikes on alky with OOF pipes on groomed tracks.) 

 

On some of the 100+ HP motors, the 2's will make 1-2 more PEAK HP. But the 4's have a much better curve leading to peak. So for the drag guys who love the 2's....stick with them cause I'm not knocking them.

But if you don't have a drag only bike.....4's FTW!

[sheerider11]

Thanks, I'll keep that in mind now for the next build.

[dirtydownunder]

id get the 4's, but i think my 3's are gonna last me my life time !

[locogato11283]

John, what all motors did you test these on? You say "some" of the 100hp motors, so I assume there were several?

 

What about the smaller ones?

 

Are they making VF4 for the CR500 cages yet?

[250rbanshee]

The vf4's are great.  I recently put them on my unported trail bike and I love em.  The power comes on sooner and smoother and they pull harder than my stock cages & TDR reeds in the upper revs.  Well worth the money IMO.

[SlowerThanYou]

Are they making VF4 for the CR500 cages yet?

 

K&T ask me if I wanted the 4s on our DMX. I didn't go with them because they hadn't tested them yet.

[registered user]

right now i think vf4 is only available for stock banshee cylinders, blaster and ktm 250. got vf4 on my ktm and they seem to work fine but ive never tried anything else so i have nothing to compare them to

[sand-a-holic]

My vf4's came in the mail today

[WINDYCITYJOHN400]

Should work great in your new cub motor.

[S10RACER]

I have the 4s in my 421 Cub. no clue on performance gain since this is a new build. 

[sand-a-holic]

I have the 4s in my 421 Cub. no clue on performance gain since this is a new build. 

 

That's where I will b sitting in a few weeks

[Yanbansh04]

If actually i have the vf2 on my 7mil cub, but i would be better buy the vf4 ?

[WINDYCITYJOHN400]

What do you use the bike to do?