RZ350 port timing compared to banshee

[4stroker]

i have been told that at low rpm when the powervalves are closed (or lowered) that the port timing in the rz jugs is exactly the same as the banshee jugs, and the only difference is when the valves are open, giving a higher exhaust port for more top end.

 

is this correct? are there any extra ports or booster ports or anything?

 

has anyone got a link to a site that shows the specs for both?

 

i can get an rz engine cheap and wanted to do this mod for more low end/mid range but not if it is only going to boost top end.

 

thanks, mark.

[4stroker]

http://www.geocities.com/kiwi_craig/PORTMAP.htm

 

found it....

 

anyone care to comment? would really like to hear from people who know alot about these engines and/or porting in general!

 

thanks, mark

[RZBansheeMan]

http://www.geocities.com/kiwi_craig/PORTMAP.htm

 

found it....

 

anyone care to comment? would really like to hear from people who know alot about these engines and/or porting in general!

 

thanks, mark

 

 

I don't have mine done yet, the topend is still at "Passion racing engines". I did however do tons of research before jumping into this project and I do have a pic of better port maps than you have there, let me know if you would like a copy. I also have all the wiring diagrams for both the RZ and the banshee to help with the wiring.

 

You will need these things also

 

Stator - Flywheel

CDI box :thumbsup:

Voltage regulator - Rectifier

Poervalve control box

Powervalve servo motor

Either a battery or battery eliminator - which is just a large capacitor

 

The Yamaha R1 uses the same servo motor for their exhaust valve and the cables are longer so you could use one of those and mount the servo a little further away on the engine and they are cheaper on Ebay than the rz servos.

 

The port lay out is similar to the banshee but the power valve will close further than the banshee is stock and opens up more than the banshee is stock. from what I understand you can't port banshee cylinders to have the torque that stock RZ's will produce, but the banshee cylinders can be better drag ported because there is no powervalve in the way. The porting is a little hotter on the RZ engine also. The U.S. models were "31K" and "48H" cylinder castings were rated at 59 HP stock and the Canadian model with the "1UA" cylinders is rated at 63 HP. I have both sets 48H and 1UA.

 

If you want to do the custom programmable ignition thing there is a guy that makes them for RZ's http://www.zeeltronic.com/page/home.php and he also makes a programmable powervalve controller which is the "cats ass" because you could dial the valves in to the pipes you have. :thumbsup:

 

I personally don't believe in running an adjustable timing plate. With the programmable ignition you can program the amount of advance that you want, what you don't want is any timing advance at wide open throttle, which you will have with an adjustable plate that's been advanced.

 

As for pipes the Stockers, Rockets, Paul Turners, and I think the new redisigned R2's will clear the Powervalve assembly. Most other will have to be dented. You will also have to make some exhaust flanges for the RZ cylinders to fit your pipes to them.

 

For port work I would contact Jim at PassionRe, Dan at Patriot, Jeff at F.A.S.T. , Jim is the only one I have talked to personally and is a super awesome guy. From what I read on the forums it sounds like Dan and Jeff are awesome guys also.

 

Let me know if you need better port maps and wiring diagrams I can email them to you.

 

As for mine it is going to be a 12 port 4mm stroker and some day hopefully fuel injection. :thumbsup:

 

Hope this helps, Mike.

[Yaxy]

Good description RZbanasheeman, you hit it on the head. To just add a tid bit. The only two RZ builders on the HQ that I am aware of is Dan at Patriot and Jim at Passion and they both are excellent. As I recall, the stock intake and transfers are the same with both motors. The difference lies in the height of the exhaust port. The RZ from the factory is 2-3mm higher giving it more of a drag port set up at wide open throttle, yet still maintaining bottom end due to the powervalves.

 

As far as pipes I am not sure if the name R2 has been finalized yet. if you have time wait for the R2???'s I have tested them and they work exceptionally well.

 

Chris

[Matt96shee]

yea, i'm going to convert to the zeeltronic guy's setup over the winter...while my jugs are at passionre for the 12port, i'm jealous btw RZman!. i think his either uses a hand held or laptop connection. i remember seeing the website, and drooling, when i was looking for a CDI.

 

i'm liking my RZshee. had a few headaches but i'm glad i did it.

 

 

I don't have mine done yet, the topend is still at "Passion racing engines". I did however do tons of research before jumping into this project and I do have a pic of better port maps than you have there, let me know if you would like a copy. I also have all the wiring diagrams for both the RZ and the banshee to help with the wiring.

 

You will need these things also

 

Stator - Flywheel

CDI box :thumbsup:

Voltage regulator - Rectifier

Poervalve control box

Powervalve servo motor

Either a battery or battery eliminator - which is just a large capacitor

 

The Yamaha R1 uses the same servo motor for their exhaust valve and the cables are longer so you could use one of those and mount the servo a little further away on the engine and they are cheaper on Ebay than the rz servos.

 

The port lay out is similar to the banshee but the power valve will close further than the banshee is stock and opens up more than the banshee is stock. from what I understand you can't port banshee cylinders to have the torque that stock RZ's will produce, but the banshee cylinders can be better drag ported because there is no powervalve in the way. The porting is a little hotter on the RZ engine also. The U.S. models were "31K" and "48H" cylinder castings were rated at 59 HP stock and the Canadian model with the "1UA" cylinders is rated at 63 HP. I have both sets 48H and 1UA.

 

If you want to do the custom programmable ignition thing there is a guy that makes them for RZ's http://www.zeeltronic.com/page/home.php and he also makes a programmable powervalve controller which is the "cats ass" because you could dial the valves in to the pipes you have. :thumbsup:

 

I personally don't believe in running an adjustable timing plate. With the programmable ignition you can program the amount of advance that you want, what you don't want is any timing advance at wide open throttle, which you will have with an adjustable plate that's been advanced.

 

As for pipes the Stockers, Rockets, Paul Turners, and I think the new redisigned R2's will clear the Powervalve assembly. Most other will have to be dented. You will also have to make some exhaust flanges for the RZ cylinders to fit your pipes to them.

 

For port work I would contact Jim at PassionRe, Dan at Patriot, Jeff at F.A.S.T. , Jim is the only one I have talked to personally and is a super awesome guy. From what I read on the forums it sounds like Dan and Jeff are awesome guys also.

 

Let me know if you need better port maps and wiring diagrams I can email them to you.

 

As for mine it is going to be a 12 port 4mm stroker and some day hopefully fuel injection. :thumbsup:

 

Hope this helps, Mike.

[RZBansheeMan]

Hey Yaxy, How's it going ?. The intake ports are taller on the RZ's also and the transfers are also a little different. The port lay out looks similar but there are subtle differences. especially on the 1UA's I would like to have some body post a nice pic of the port maps. I do have them for the 31K - 48H which are the same and the 1UA so people can see the difference. I could email them to you if you could post them.......I don't know how. I could also take some pics of my 1UA intake ports and have some guys look at these honkers. This may sound weird but the bottom of the intake window, in the liner, is lower than the bottom mating surface of the cylinder.

 

P.M. me if you are interested in looking at the maps or pics of the ports.

 

Mike.

[cbn70]

hey rzbansheeman, have you tried the programable povervalve controller and the programable cdi? If you did was wondering how you liked it? I have one, but have not had time to install it in my rz powered shee.

[RZBansheeMan]

hey rzbansheeman, have you tried the programable povervalve controller and the programable cdi? If you did was wondering how you liked it? I have one, but have not had time to install it in my rz powered shee.

 

I haven't purchased them yet.......

I still need to get my cylinders, crank, coolhead back from Passion. I have to come up with the cash first if you know what I mean.

[Matt96shee]

hey man, where did you get the cool head? from passion?

 

 

I haven't purchased them yet.......

I still need to get my cylinders, crank, coolhead back from Passion. I have to come up with the cash first if you know what I mean.

[RZBansheeMan]

hey man, where did you get the cool head? from passion?

 

Found it on Ebay sometime back...I made sure I ended up with it, if you know what I mean. Go to pro Designs website I think they still have them listed, but I have read that they don't make them anymore in another forum. However I cannot confirm that.

[RZBansheeMan]

Found it on Ebay sometime back...I made sure I ended up with it, if you know what I mean. Go to pro Designs website I think they still have them listed, but I have read that they don't make them anymore in another forum. However I cannot confirm that.

 

http://www.prodesignracing.com/main.htm

[Yaxy]

Thanks RZBansheeMan for the clarification and the offer for the port maps. That would be interesting to see the differences. It was my understanding that they were the same. If you would like, send me a PM and I will send you my e-mail address.

 

Also, last year I bought a cool head for the RZ from Pro design. Give them a call and talk to Tom. I am sure they are still made.

 

Chris