Can a Rocket III take down the establishment, and rule this island

R-III-R Turbo

Mine is the biggest :)
Joined
Oct 12, 2010
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Ireland
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2.5L Supercharged Carpenter Rocket III Stroker
Sorry Joesmoe, I missed your request. I meant the valve with the tweeter. The boost limiter valve ( large alloy item) is a good thing. Art will have trouble with the tweeter valve.

What's a tweeter valve when it's at home?


It's hard to tell, only solid way to find out is to do it I think.
9000rpm x 100mm drive pulley / 85mm supercharger pulley × 9.49 supercharger ratio = 100,482 rpm on the charger with zero belt slip. 100,00rpm is the limit for the charger so it will make max boost that this engine config will make.
I'll be happy with 14-15 psi, anything more than that is a bonus.
Ideally I want the max the fuel can take without retarding ignition back to the stone age.
@Claviger
 

Neville Lush

www.nevillelushracing.com
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Feb 26, 2007
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980
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Victor Harbor South Australia
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Speed Triple 1050 Dirt Track sidecar,H2750Roadrace sidecar W800 Kawasaki
Post #84 on 26th Sept this picture , the valve hanging off the blue hose with the f----ing whistle on it.
1664939567849.png
 

R-III-R Turbo

Mine is the biggest :)
Joined
Oct 12, 2010
Messages
2,031
Location
Ireland
Ride
2.5L Supercharged Carpenter Rocket III Stroker
Post #84 on 26th Sept this picture , the valve hanging off the blue hose with the f----ing whistle on it.
1664939567849.png

Aha the blow off valve or dump valve. Have not heard it called a tweeter before.
Please do elaborate on why this will give trouble?
 

Neville Lush

www.nevillelushracing.com
Joined
Feb 26, 2007
Messages
980
Location
Victor Harbor South Australia
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Speed Triple 1050 Dirt Track sidecar,H2750Roadrace sidecar W800 Kawasaki
Each time I have seen one on a supercharger, (not just R3, or TTS) they never work for long without leaking or sticking open, or backfiring out the sealing O ring. There is no sensible reason for having one, that I can see, especially when you have a boost limiter valve right next to it. Every bike I've ever worked on with one, it ended up in the bin or locked shut to avoid problems. What do you need it for Art? The noise when it shoots off?
 

R-III-R Turbo

Mine is the biggest :)
Joined
Oct 12, 2010
Messages
2,031
Location
Ireland
Ride
2.5L Supercharged Carpenter Rocket III Stroker
No sensible reason 😆😆😆
I got a supercharger to go with my BOV, because PHUH-TISHHHH 😁

I know what you mean, I had an el cheapo BOV a few years ago and it gave trouble when an o ring went but one works well so far. Only a little maintenance needed.
Apparently a BOV is to release the pressure in the manifold when the throttle is closed to avoid pressure on the butterflies and stop it being pushed back out through the impeller and upsetting it.
The BLV just caps the max boost for safety, apparently.
 

Neville Lush

www.nevillelushracing.com
Joined
Feb 26, 2007
Messages
980
Location
Victor Harbor South Australia
Ride
Speed Triple 1050 Dirt Track sidecar,H2750Roadrace sidecar W800 Kawasaki
The boost limiter valve shown looks like one I have used, Scott got onto it and spread the word. I usually machine them down so they are not so massive. I must have removed over 20 of the turbo style tweeter , pshuush or whatever valves and have never once had an issue with the charger, even slamming the throttle shut from 11000 rpm on 260hp V Rods. I have had many problems with them as outlined above. If you are only using it ten seconds at a time, you may be able to keep up to the maintenance on it. Your call. Sort of trying to save you some of the grief I have had over the past.
 
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