2023 V4S Dyno Tunning @ Carita Motorsports in Miami

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bp_SFV4 said:
Most post was meant as a reply to this.

I agree with what you’re saying. Besides, I never got on a Ducati and thought it needed more power outside of removing the OEM noise and emission constrained stock tune. Let’s say that’s a legit number, call it 220 HP at the rear tire, I’d say that’s just about the bleeding edge of reliability for an otherwise stock engine.
Click to expand...

Why would an extra 8 hp effect reliability?
 
Here’s the 23 R timing specs
IMG_0562.jpeg
 
SuperDomestique said:
Here’s the 23 R timing specs
View attachment 53023
Click to expand...

Thanks very interesting. Intake V4 13-49 242 degrees duration V4R 6-56 242 degrees duration. Ex V4 56 -13 249 degrees V4R 62-10 252 degrees. The intake has the same duration but the intake closing been retarded 7 degrees for topend. Longer duration on the exhaust and earlier opening. That must be doing that to get scavenging at 16,000. Early opening gives away some torque. Surprisingly little overlap. The R cams typically (at least the twin cams) have more aggressive flanks (more area under the curve for the same duration). More aggressive flanks would also achieve more overlap than the numbers suggest. Do you have the lift numbers? Thanks.
 
SuperDomestique said:
Here you go

View attachment 53024
Click to expand...

Almost 4 mm more intake lift than the V4S. This cam set will produce at least another 15 HP in the 1103's. Same valve sizes so the cam saddles should be the same. Should be a bolt in. The intake valve shimming will be totally different to allow that extra 4 mm. Now the overlap makes sense. The closing ramps must be cliff like. Thanks. I'd like to try a set of these.
 
baggerman said:
Almost 4 mm more intake lift than the V4S. This cam set will produce at least another 15 HP in the 1103's. Same valve sizes so the cam saddles should be the same. Should be a bolt in. The intake valve shimming will be totally different to allow that extra 4 mm. Now the overlap makes sense. The closing ramps must be cliff like. Thanks. I'd like to try a set of these.
Click to expand...

Would be interesting to see the results. It’ll cost you a pretty penny unless you can find used. You’d probably be in $5k+ for the camshafts

https://ducperformance.com/product/front-intake-camshaft-3/
 
I find it interesting they're call out the intake openers setting range to be 0.001 inch tighter. So valve length change on the intake must only be around 0.001. $5k ouch. I'll have to wait to see how these work until Steven buys a set.
 
Are the heads the same? The valve sizes are but one could compensate for that intake lift cam by moving the cam saddle down in the direction of the guide.
 
Actually it's probably more like 20 HP. R connecting rods would be a good idea also. Power peak goes into the mid 14's? These cams and a careful blueprint 240? More? What did the GP motors these were based on make? 270?
 
SuperDomestique said:
Heads from 2021 V4S and 23 R have different part numbers. Even going from the 21 to 21 V4S the head part number has changed
Click to expand...

The heads may be a chamber volume thing also. Since the stroke is the same if you used the same rod length and pin height you'd have to change the chamber volume to keep the compression up. Or use a thinner head gasket. Head gasket part # the same?
 
bp_SFV4 said:
I’m sure you’re well aware that tuners can be more or less aggressive with their tunes. It also wasn’t 8 over a stock tune it was 8 over another tune.
Click to expand...

I guess my point is I don't think 30 HP would matter if the motor was built right. The oiling (rod puking) failures are due to the particular motors characteristics more than the design. Ducati call out a rod bearing clearance spec where the max is twice (or so?) the minimum. First order the annular space of the bearing to journal would double. Required oil flow to service that gap first order double. Add a loosely toleranced oil pump. Careful assembly and I bet these are bulletproof. How many WSBK Ducati motors failed in races last season?
 

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