V-Boost.

[jackw72]

Hey all.

I was intrigued in one post to hear about V-boost which sounded like some kind of added turbo on a bike.

Could someone explain what it is and what bikes you get it on pleeasee

Thanks

Jack

[Kickstart]

Hi

Only on the V Max. Basically a system that joins some of the inlets up at speed, so a pair of cylinders share a pair of carbs.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jackw72]

Thanks so does this literally add a boost to the bike and dya think you could implement it onto a different bike??

Thanks

Jack

[Kickstart]

Hi

Shouldn't really add much of a boost, and could probably be done better ways these days. The Vmax has fairly small carbs (35mm I think, 1200 Bandit is in a fairly low state of tune and uses 36mm carbs), which is likely to help low down power at the expense of top end power. Suspect the V Boost just salvages some of the top end power sacrificed by the smaller carbs.

Would be difficult to implement on other bikes.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jackw72]

Gracias Senor

im guessing keith is a man anyway

cheers mate i will look into this a bit more seriously a bit further into my biking career. (i dont own a bike )

[gavin]

v boost really only works for big cylinders on slow revving bikes, as in the v max. it uses the suction created by one cylinder to force feed the other cylinders.

even though the exhaust valve on one cylinder has just closed, the entering air still has momentum and wants to go somewhere, v boost diverts it to the open cylinder, thereby supercharging that cylinder.

its a bit like the way expansion chambers work on 2 strokes, getting more air & fuel into the cylinder than the piston can pump on its own.
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1988 TZR125 : 1990 RD350YPVS/ RGV250 HYBRID : 1982 RD80LC : 1983 RD80LC : 1994 RGV250 : 1991 TZR125 / CR500R HYBRID : 1976 BENELLI 500 QUATTRO : 2006 TRIUMPH 675

[jackw72]

oooo that sounds cool. i reeeaaally want to make my own bike from scratch one for the experience and two because id love to own something ive made


thanks all!

[bonzo-b]

Turbo it anyway !!
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Bandit 1200 / Kawasaki GPZ750Turbo
If you`re gonna be stupid,
you`d better be tough !!

[colin1]

[Jenks]

my mate has a vmax, and when v boost kicks in, it is scarey!
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1978 MZ TS 250 1 Supa 5
1992 yamaha fzr1000 exup
1998 aprilia af1 sintesi

[stevo as b4]

A super charger kit is the way to go for the brave V-max guys! I know that a low boost kit on a V-max will easily make 200bhp! TBH the chassis can't use anymore power than this, and thats being kind!

[jackw72]

now it sounds far more interesting although i got the impression from kickstart it wasnt that effective but some are saying it is gooooood

[Zimbo]

I think keith was saying it does have some effect on the V-max, but only because of the engine characteristics and nature of that particular bike, and that introducing the system into another, more efficient bike in a higher state of tune would be likely to have no positive effect and quite possibly a detrimental one.

[jackw72]

why thank you for the explanation

[Zimbo]

pleasure, any time

[Torque05]

[funmonkee]

Standard 'boost kicks in at 6k revs on a standard machine. You can alter that but most opt to fit a kit like the Tboost or Zboost in the UK. Tboost gives the options of off, standard 6k or 3k. Zboost is off or on fulltime. These kits are fun but they drain the already small fuel tank quickly. I can usually get just over 100 miles to the tank of a standard Vmax, riding motorways and some city streets. If the Tboost is set to 3K, it drops to about 70 miles between fillups.
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