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I am working on a 900SS/SP motor. I am looking for ST2 cams to go along with the 944 Pistal pistons and head work. I know they are hard to find but can anyone point me in a direction on my search?
Thanks, Stephen
 

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The ST2 cams have lift similar to the carb cams, yet have longer duration.
The FI cams have more lift than either ST2 or carb cam, yet sort duration similar to the carb cam.
VeeTwo and others make 900 2V cams, but are not considered "drop-in" cams.
Squish with hi comp pistons becomes an issue.

FI cams were designed to work with the short intakes associated with the individual injectors that the FI SS had.
ST2 cams seem to work will with SS that still use the long intakes and paired carbs.
Both are an improvement over the carb cams.

ST2 donor bikes have been well picked over, and FI cams are easier to procure.
Keep your eye's peeled on ebay etc ...
 

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The ST2 cams are sort of an urban legend, I think. They command big money when you can find them. The longer duration is a good thing if your running high compression. What kind of increase are we talking here, 2-3 hp ?
 

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The ST2 cams are sort of an urban legend, I think. They command big money when you can find them. The longer duration is a good thing if your running high compression. What kind of increase are we talking here, 2-3 hp ?
yeah. i've never seen any published proof they are a worthwhile addition to a long manifold engine. not sure if eric has or did when he was with bruce?

eric?
 

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Lol... no Bruce was/is a fan of them and I have used them in many race bikes from 900's 750's and I have put them in 3 800's so far. Problem is without back to back runs you never know truly what you gained with them vs a 900ie cam.Each case was a full build where everything was thrown at it at once. It has just been something you used because it worked well in the last one.

I almost grabbed a set last fall "just for testing" purposes in one of my own bikes. One day I will have the time to make a valid comparison. It is better to Have Brad do it as he will do a proper write up on it, I have no time and can barley string sentences together.

And if anyone complains about adjusting ducati valves they should do a VTEC VFR800, they may be happy with them but just checking involves pulling all 4 cams twice....
and that's if they are all in spec!!! But its a Honda, you never have to adjust them! Except I am needing to order about 5 shim buckets at about $30 each
 

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"sorry mate, i only work on italian bikes."

never stray from the rule.

says he who has just finished a 72,000 service on a 2014 mts1200. i like to stick something long, pointy and hard up the arses of the pricks who designed them.
 

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And if anyone complains about adjusting ducati valves they should do a VTEC VFR800, they may be happy with them but just checking involves pulling all 4 cams twice....
and that's if they are all in spec!!!
Been there done that Ducvet,I own an '03. It's a very labor intensive procedure just to find out that nothing needs adjusting.

But its a Honda, you never have to adjust them!
Agreed. I've also got an '04 RC51 with over 42K miles on it and the valve clearances are still within spec.

FWIW Ducvet I installed a set 92mm FBF high comps and a set of ST2 cams in my '95. Got the cams many years ago brand new in the box from a friend of mine who works the parts counter at my local Ducati dealership. He had 3 carby 900SS's and was saving them for a build that he never got around to.

With the ST2 cams installed at about 3800 revs you can audibly hear the exhaust note change from a burbling thump to a tight focused throbbing thrum,kinda like a huge machine lathe at full song. As the tach needle sweeps past 4000 revs the engine immediately gets your attention and becomes noticeably livelier. It carries that power surge up to right about 7500 revs or so. That was with the stock airbox,stock 38mm Mikuni's,and long intakes still installed.

Coupla years later I installed a set of 41mm racked FCR's and with the increased throttle response that those carbs provided it just accentuated that power surge at 4K revs. Every one of my buddies who rode the bike mentioned it.

In my experience I think the best way to describe the ST2 cams is that below 4K revs you have a nice docile around town bike and after 4K revs you have this sort of angry bumble bee.
The engine power characteristics with the stock cams installed felt nothing like that.
 

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When I was searching for ST2 cams for my Monster build, there were none available.

Then I found a bike breaker selling an ST2 engine so I bought that, used the cams and then sold most of the ST2 parts on - took a while but I ended up getting more back for the parts than I paid for the engine (and I've still got some leftovers).

I can't say what gains the cams gave individually as I did an extensive build; 944cc, HC pistons, gas-flowed heads, split-single FCRs etc. but the end result was well worth it.
 

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I did a complete rebuild w/ 944 Pistals, head work, SSie cams, racked FCRs, etc. The motor dyno'd at 93 hp / 71 tq. I'm happy. ST2 cams and split FCRs might have yielded a little bit more. At the end of the day, its probably splitting hairs, though.

After installing the TPS recently, I wonder if this is more significant than SSie v. ST2 cams?
 

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If you are going to go to this extent, why are you not considering the High Torque cams from Vee two along with a set of there 944 pistons and the longer exhaust vales required?
 

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the st2 cams will allow more top end than the 210, if the long manifolds can support it anyway. the 210 has very short exhaust duration in particular.

the 210 need longer inlet valves, due to the reduced base circle that is needed for the 13mm lift.
 

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I did a complete rebuild w/ 944 Pistals, head work, SSie cams, racked FCRs, etc. The motor dyno'd at 93 hp / 71 tq. I'm happy. ST2 cams and split FCRs might have yielded a little bit more. At the end of the day, its probably splitting hairs, though.

After installing the TPS recently, I wonder if this is more significant than SSie v. ST2 cams?
tps can't help the wot power, but it can make a big change to the part throttle rideability and fuel economy.
 

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Discussion Starter #18
Depends on how much money you want to spend...???
New Replica ST2 cams here:
Tuning-Teile kaufen und Tuning Tips | Ducati & Aprilia-Tuning Kämna
Does anyone have an opinion on these reproduction cams? Know any history on them?
I am new to engine build ups and would like any feedback on how to best take advantage of the Keihin FCRs, Pistal 944 piston kit, valve and head work. I have been talking with the Ducshop about the work. ST2 cams were suggested as the best set-up for streetability. I am using short manifolds with split carbs.

Thanks, Stephen
 

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Does anyone have an opinion on these reproduction cams? Know any history on them?
I am new to engine build ups and would like any feedback on how to best take advantage of the Keihin FCRs, Pistal 944 piston kit, valve and head work. I have been talking with the Ducshop about the work. ST2 cams were suggested as the best set-up for streetability. I am using short manifolds with split carbs.

Thanks, Stephen
Can´t really help you with setup etc but I can tell you that Kämna Ducati have a fearsomely good reputation in Europe - I wouldn´t hesitate with using these cams from them - in fact I have been pricing up such a build vs going the 1100 way - I´m tending more to the 1100 direction as I´d get more bang for buck & a newer engine in the process... Ref thread on when to cut bait.
 

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58fleet - My understanding is that the FI cams are better for short intakes similar to what you would get with the FI engines. Shorter intakes have a higher "standing wave frequency", so less impedance to intake flow. ST2 are ideal for wanting real-world midrange, hence needing that with 944 for the ST2 to compensate for the bike's extra weight.

FI cams higher lift than carb cam
ST2 cams longer duration than carb cam.
 
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