749r radiator?

[Ben710]

Originally Posted by demontech

thats a good shot! this works so well! a hoop in front of the radiator helps a lot if you have removed the intakes or the peices below the stock intakes

You mean like on the factory bikes? Would love one of these...



Nikos, keep the Q´s coming. Maybe we can help.

[demontech]

ffffffeeeeeeeccccckkkkkkk!

[MultiDoc]

Ok let me give you an idea about what is bothering me regarding heat/running temps of my 999 and of course your input and insight is needed; either to solve it, lower the temps or find what's causing it and what can be done. But you can always tell me it's just fine and not to bother too

Until last year (2007 I mean) I haven't had any problems with heat or running temps. I only noticed it last August during the annual 6h endurance race. The bike was constantly running at 100-105 at race pace and near personal record lap times. The other two riders of our team (when we discussed about it after the race) said they had temps up to 97-98C. We said that this might be because my lap times were 2-2,5sec lower than theirs and we also have quite different riding styles and probably I was using the higher rpm area more than they did.
Note also that I have lowered my lap times considerably from last year, so the bike was indeed being pushed more. Also note that late August here in Greece means 36-39C air/ambient temperature and quite often it climbs above 40C. On race it was 38C+ constantly.

Now my setup, as I said it in an earlier post here, the bike is engine-wise almost totally stock. I have changed the whole clutch for a slipper + lighter basket and plates, have ergal belt rollers, a full 57mm asymmetrical Termi kit+DP filters+ DP ecu and tons of other non-engine related parts and bits all around. As for the cooling system, I have swapped the stock hoses with Samco silicone hoses, the oem water pump cover with the SpeedyMoto billet one and always use a 50-50 mixture of distilled water+Water Wetter in the rad.

Now onto questions.

- can the overheating be solely because of the high ambient temp combined with the exhaustive 6h endurance race we were in ?

- do I need to do something about it ? (depends heavily on the above question's answer I guess)

- you think something might be at fault ? Have checked everything and all work fine on the bike, but I know a bad A/F can cause overheating for example, Ideas ? Things to check ?

- if all is ok, but still need to lower the temps, then I think that I'll need to fabricate some kind of "scoop" like the factory bike in the previous picture, to make sure that all the air that comes through the fairing also goes through the rad and doesn't escape above, under or to the sides.
Any idea of materials to use etc for this ?

I guess my rumbling must have made you click away already so I'll stop here.

P.S 1: I forgot to tell you that I haven't noticed such overheating in any other track-day I did, usually runs around 95-97C and sometimes lower at 93C, but then again those are temps I get when racing in March, April, early summer or even November.

[tye1138]

First thing to do is check the A/F! Thats step 1. The DP ECU isn't great.

My 748R motor ran hot when I first got it, even though the plugs weren't white, a simple re-map resolved it, never had an issue after that.

I've not yet done any endurance stuff, so I don't know how my bike will react. In fact, the longest period of time its been on the track was 15 laps or so... Mind you, the temp always stays regulated during my laps, so I would assume it would stay the same during an even longer race.

I've been in 40C racing, never had an issue on track. The moment you slow down, EEK! The blue light on the dash blinks (falcon dash) telling me my water temp is over 100C.

[demontech]

dosnt sound that bad to tell you the truth. yes, make sure it is tuned properly-the dp ecu's are terible and need a piggy back to straighten them out air fuel wise. this will help but between the therm mod and a rad hoop you will be gold. i make things like that from a sheet of abs plastic or equivilant. make it from card bord first then trace it to the abs. use a heat gun to shape it(this seams to work only one heat cycle so get it right)

[Ben710]

Hey Nikos,

I don´t mean to bother you, but that´s way too hot for my liking. It should be run at 80°C, that´s where it will make the best power. If you read my linked post, I found that you´re losing a good bunch of horsepower by an overheating engine.

Now, 40°C outside temperature is a lot and quite unusual. I don´t think you can use the stock radiator to cool the bike down to 80° at these ambient temps. I tried and had no luck.

Regarding your "modifications" go, the Samco hoses won´t do anything to the water temperature. I think they can resist more heat.... and they look racy. The water pump cover is just good for the bling and crash protection. The water wetter stuff shouldn´t bring temps down, too.

I thought about adding a 2nd radiator to my bike. One idea was to place it in the cockpit. Possible when you run the 04 fairing. But the downside would have been, that it would get quite warm, because all the hot air will be directed towards the rider. I don´t know if that´s advisable. Second option was mounting it on the right hand side, like they did with the RC51 (VTR 1000). I liked that idea but never did it, because I got a grip on the heat problems with the fairing being cut out.

While reading your post again, I thought about your head gasket being malfunctional. Did you check that? If you have a problem there, the heat will increase for sure.

I´d say, go and try what the demonic technician from hell suggested and remove the thermostate + plug the water pipe. The "wind umbrella" is worth a look too. Doesn´t your mate make carbon fibre stuff?

If that fails, don´t bother with the homemade shyte and buy a radiator.

Guess what Walter has on offer:
DUCATI 1098 RS KIT RADIATORI UFFICIALI MB MOTORSPORT bei eBay.de: Motore e Trasmissione (endet 26.02.09 18:06:42 MEZ)


I´m sure he has something for your 999.

Otherwise I can get a few % at Rehm Race Service in Germany:
Kitkühler

They´re 1080 Euros for the 999... so... if you want one, I´ll see how much I can do with Kurt on the phone

[trussdude]

My bike ran the right temp in most conditions.


In Arizona, Nevada and Utah we still race or do track days in +105 temps.

The bike ran cooler and more conssitant temps with the bigger radiator.

Tye

What else do you want to know?

[tye1138]

Originally Posted by trussdude

Tye; What else do you want to know?

Exterior temp vs water temp numbers. See if you can bring up a log file or something. It would be interesting to see the ratio and then I can find my ratio and compare.

[CorseMoto]

OMG! Where's that ignore feature...

[Ben710]

Hey Deton8d,

here´s a 749R rad for sale:
FOR SALE Brembo calipers, 749R radiator, 749 tank - Ducati Superbikes

[Deton8d]

Already got one, thanks though!