turbo / supercharge / possible group buy?

Wrecka said:

Out of curiosity do boosted R3 engine require any internal work at all like Pistons ?

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No, but as Oldschool mentioned if the fueling is off a little bit you're toast.

sleeves said:

There's probably not a real need too, but just cos ya can. With the R3's low compression its almost a perfect sitter for any positive pressure system IMO.

See this Utube video, the guy gets his turbo R3 from 0-150mph in a very short time.

https://www.youtube.com/watch?v=HnKBdkwOFhg

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I'm the guy. Can't believe that video is up past 14,000 views! And I'd say the only need to go boosted is if you want to match the power of the built n/a engine while keeping the redline the same as stock. Carpenter's higher revving 210+ hp bikes will be faster than my turbo bike in the quarter mile. My 0-150 mph time is quite slow considering Carpenter's race bike that does the 1/4 mile at basically 9 seconds flat at 160mph. I think that bike is more in the 260 to 280 hp range though. I do have gobs of torque down low however which is real fun on the street and is pretty much where we all ride right?

Torque addict said:

No, but as Oldschool mentioned if the fueling is off a little bit you're toast.



I'm the guy. Can't believe that video is up past 14,000 views! And I'd say the only need to go boosted is if you want to match the power of the built n/a engine while keeping the redline the same as stock. Carpenter's higher revving 210+ hp bikes will be faster than my turbo bike in the quarter mile. My 0-150 mph time is quite slow considering Carpenter's race bike that does the 1/4 mile at basically 9 seconds flat at 160mph. I think that bike is more in the 260 to 280 hp range though. I do have gobs of torque down low however which is real fun on the street and is pretty much where we all ride right?

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Can you share you experience with us? , did you go this work yourself? Love the video btw,

Heres the piping from marks workshop in oz... setup looks nice, dont know if youd burn your leg easy on the turbo mounted there

https://www.youtube.com/watch?v=Rw3o0zM8ceM


Torque addict, whats yours look like, didnt get to see it in the vid

Look under my avatar and where it says Media: 19 click on the 19. There are some pictures there. I've also talked about it quite a bit in other posts so you can search those for more detail but basically it is the boost is good kit that dougl gave a link for earlier in this thread. It was on the bike when I bought it and is why I bought it. They used to have their proprietary controller but I believe they now use the PCV with boost sensor wired to the analog input. That is what I have now as well. The previous owner also added a blow-off valve. It's a $5.5k USD kit and I paid $10.5k for the bike so I got a good deal because the bike itself was easily worth $8k to $9k when I bought it.

If you search my posts you will read of the problems I've had with the busted piston which was either done by the last shop that tuned it or by the 2nd to last owner that had the bike before me. I've just completed my rebuild and am working out a few kinks before I go put it on the dyno to get it all dialed in. Honestly, knowing what I know now if I could do it all over again I would probably opt for the Carpenter 240 package (or higher). I love the low end torque this has got but my guess is the Carpenter bikes still have sufficient torque down low and have the advantage of higher revs. I generally don't like to rev an engine to be in its power band but if it's got enough torque down low that you usually don't need to rap it out then when you really want to fly it is a huge advantage to be able to go faster in each gear. Being able to use 87 octane gas is also a big plus. Once you have to repair major damage due to a forced air application it kind of forces you to rethink things.

Also, I really wish my turbo had an intercooler but once you start doing that it starts getting ugly. Since the supercharger is already up front it's a lot easier to put a intercooler on and have it look decent.

There is no lag on the turbo used by boost is good. It is an Aerocharger variable vane turbo. As you can see by the video it hits 9 to 10 psi of boost instantly with a twist of the throttle.

Torque addict said:

Also, I really wish my turbo had an intercooler but once you start doing that it starts getting ugly. Since the supercharger is already up front it's a lot easier to put a intercooler on and have it look decent.

There is no lag on the turbo used by boost is good. It is an Aerocharger variable vane turbo. As you can see by the video it hits 9 to 10 psi of boost instantly with a twist of the throttle.

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Dude since you plumbing does not support the addition of a inter cooler you should add a alcohol spray and use windshield wiper fluid the 50/50 stuff. Just set it up with a couple pressure switches to stage it.

Wrecka said:

Is there any real need for boosted engines on R3'3 , seems to be plenty +200 hp bikes on here with work on the internals and naturally aspirated , not sure how the price of getting there compares to the turbo/super charger route though , anybody ?

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Similar costs for similar outcomes. Boosted bikes tend to make torque and HP lower in the rev range but in well set up applications can hold the HP over a broad range. Tuning boosted bikes is no different in true fact than a N/A machine. Blokes like Nev can do this with their eyes closed

MRJ said:

......... Blokes like Nev can do this with their eyes closed

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He does.

Torque addict said:

Being able to use 87 octane gas is also a big plus. Once you have to repair major damage due to a forced air application it kind of forces you to rethink things.

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Yes, been there, cost of poor dyno work was a new crankshaft & 3 pistons, still we live & learn.

Tuning boosted bikes is no different in true fact than a N/A machine.

Superchargers build boost in a fairly predictable curve and aren't that much harder to tune for. Turbos don't have a physical connection to the crank and don't build boost in the same predictable way. You have to know what your doing or you will have a bucket of parts. A little to lean on a N/a motor and you probably will have glowing header pipes and a loss of power. A little lean on a boosted motor and your at best toasting the rings and blowing your oil out the breather, or at worst scragged the pistons/crank/rods/block. A bad tune, or a failure of some part of the efi system could cost you a 2 to 3K motor in a split second on a boosted motor. Most bike shops here have minimal to no experiance tuning boosted engines, simply because very few people ever go forced induction on a motorcycle. Not to mention many modern motorcycles are just not good candidates for boost. They have weak internals, air cooled, weak EFI systems, high compression stock, etc. Only way I would consider running a turbo on a R3 is if there was no way to make more power on motor.