banshee pvl

[1998BansheeHD]

What is a banshee pvl ignition? and are there any benefits, also is it more reliable?

[gregrob]

Forget it unless it's an all out drag bike, and even then I wouldn't run it, but plenty of folks do.

 

It's a complete aftermarket ignition system that essentially doesn't have a flywheel, so the torque loss is huge.

[1998BansheeHD]

So without a flywheel how does it operate?

[gregrob]

Here for pics http://cgi.ebay.com/ebaymotors/Yamaha-YFZ-...271410003r30393

 

It has a pickup coil type system that goes over the crank snout and has a sensor on the crank. From what I know.

 

I dont know a ton about them, but I do know you will hate life tryin to ride it unless you want to redline it every time you take off.

[XxMeltIcexX]

I would say the system is just a "Mini Flywheel," you still mount on a chunk of aluminum (not steel like stocker, of course), only difference is its small, light, and has no key. I can't find the link right now but there are dyno sheets that show the difference in the power curve, much improved over stock for drag racing, as the power is made more-so on the top end. I cannot vouch personally yet as I have one but have not ran it yet, I'll keep you posted for sure. By the way, PVLs are trick as shit! Gregrob have you ever owned one?

[gregrob]

No I haven't, I have however ridden a bike with one long enough to know I didn't want to own one, ever, for my purposes.

 

I'm not professing to be an expert on them, other than knowing they kill the ability I have right now to let the clutch out on either of my 4mils with almost no throttle and just take off.

 

It's an expensive thing to "try" unless you're building a max effort drag bike.

 

There was a guy on planet sand trying to trade one straight across for a stock ignition. It obviously didn't work too well for him either.

Edited June 29, 2009 by gregrob

[FireHead]

Beyond the hardware stuff that has already been mentioned: The PVL basically has a fixed time curve that that manufacturer will not disclose. They can be ridiculously hard to tune, and if you have any troubleshooting that needs done, it is very hard to deal with.

 

Lots of people run them for the faster rev of the engine, but I never had any luck with them.

[PassionRE]

Beyond the hardware stuff that has already been mentioned: The PVL basically has a fixed time curve that that manufacturer will not disclose. They can be ridiculously hard to tune, and if you have any troubleshooting that needs done, it is very hard to deal with.

 

Lots of people run them for the faster rev of the engine, but I never had any luck with them.

 

 

PVL....PRO"S and CON"S

CON"S

1) Loss of headlights due to no windings for power supply.

2) Special tools needed for accurate timing adjustments.

3) Special wiring considerations and diodes or dual kill switches.

4) Applied maintenance practices observed while doing such tasks as compression ck's etc to prevent damage to stator windings.

 

 

 

PRO's

 

 

1) Individual coils that fire every 360 degrees individually instead of a shared coil that fires every 180 degrees=better quality ignition spark.

 

 

2) Less rotating mass resulting in less crank fatigue and quicker spool up times.

 

 

For the average engine the stocker is probably the best choice. For serious drag race engines...PVL all the way.

Complaints of loss of launching ability in drag racing with a PVL in almost every case is a lack of balance between Time/Area porting design and a given engines effective displacement design at rated max HP RPM. Other considerations apply as well but this ratio by far is the most common mistake made. Engines that are designed observing these calculations dont need a heavy flywheel to launch out. Stock flywheels are simply a band-aid for engines that lack these design consideratons.

 

Heres the PVL Curve.....enjoy....Jim