1123cc Big Bore Piston Kit for 1000DS

[yotogi]

Wow. You know that I had not thought of switching a FI bike back to a carbie.

For you, what would be the benefits of such a conversion?

[junior varsity]

even bigger wheelies. more fuel dumped in.

[Duck-Stew]

A bike like that....  needs some high performance camshafts! 





(just pullin' your chain Travman...) 

[The Don]

Would you need to install a larger oil cooler? probably a dumb question for those of you that are in the know.

[Travman]

Not sure if it needs a bigger oil cooler.  I know pretty well what temperatures it ran at before the operation.  I'll consider another or bigger oil cooler if I see any changes. 

[caperix]

A few weeks ago when I was at my Ducati shop where they are working on my bike.  They had dyno'ed my bike before starting the work.  They were excited to tell me my bike looked very healthy on the Dyno.  It had nice curves and a max of 86hp.  They thought they might be able to get a little more because the valves had been set way to tight.  They were also impressed because they had been working on a 944 2V race bike that had lots of specialized NCR parts & tons of money in it that made about the same hp as my stock 1000DS with Termi mufflers, pods & a PCIII.  

Anyways, what stuck with me is one of the guys said, "can you imagine what that bike could do with a set of FCR's?".  Up until then I had never considered carbs for my fuel injection bike.  Chris from CA-Cycleworks mentioned yesterday that a stock DS1000 can put out 100hp.  So, I'm considering the FCR's as the next project for my bike.    

I have always been lost at were the power comes from on the 100 hp carbed 1000ds.  The 45mm throttle bodies should have more airflow than the 41mm FCR's, are the factory injectors being maxed out.  I know they are often installed with short intakes, how much do the shorter intake runners contribute to 100 hp?  Or is it just the ease of tune and a 1000ds with a nemesis should make similar power?  On these conversionsis the ecu still used for ignition control, or is that swaped over for carb parts also?

[jwoconnor]

I'm not sure how carbs could be better than efi if your fuel air ratio is correct. Fuel injection mixes better, responds faster and is easier to tune. I've never heard of any race bike being converted to carbs. I've heard of plenty being converted to efi. I could see bigger throttle bodies perhaps.

[junior varsity]

what? lots of race bikes run carbs.

[jwoconnor]

what? lots of race bikes run carbs.

AMA SuperBikes, World SuperBikes or MotoGP bikes?

What year did Ducati last run carbs on their SuperBikes?

[junior varsity]

You are talking about the big top-level racing with colossal budgets and lots of technology. Amateur racers use carbs all the time.

[jwoconnor]

There are many privateers filling the AMA grids. I guess I assumed they left the EFI in place. I'm willing to read up on it if anyone has some links to any amateur team sites showing Sportbikes built in the last decade being retrofitted with carbs. IDK seems counterproductive to me but I'm open to anything. 

[junior varsity]

some of the guys back home ran 'sakis with carbs.

and also wore their ninja turtle outfits out to bars. 

[Case S2R]

Great thread I can't wait till the results,

Coming from an auto background, carbs are good and built correctly put out incredible HP but FI today is soooo much better.  It would have to be a real good set of carbs to replace FI and this is considering the horrible open/closed loop system on some of our bikes.

DP ECU, Pwr Commander, larger injectors, bored throttle bodies, and a set of cams, that covers every benefit carbs should give, correct?

I left out the stack of dolla billz you would need vs. the carbs.

[jwoconnor]

Great thread I can't wait till the results,

Coming from an auto background, carbs are good and built correctly put out incredible HP but FI today is soooo much better.  It would have to be a real good set of carbs to replace FI and this is considering the horrible open/closed loop system on some of our bikes.

DP ECU, Pwr Commander, larger injectors, bored throttle bodies, and a set of cams, that covers every benefit carbs should give, correct?

I left out the stack of dolla billz you would need vs. the carbs.

You would need cams to get the most from carbs too.
Once you have a tunable ECU or DP ECU and Power Commander you never need to remove anything to change jets. Just plug in the PDA.

[greenmonster]

Sport 1000DS, Keihin FCR 41mm, MSD MC-4 ignition m Blaster coils, 50mm exhaust.
Standard cams, no 1100kit, HC pistons or porting:



"Black Sheep" at ducati.ms.