Desmoquattro 1080 Motor

[foggy123]

Bruce Myers of Myers Performance built me a 1080 Desmoquattro motor.

Specs: 996 St4s motor, 1000 DS crank, 506 cams, S4 MBP red heads, Motowheels slipper, BCM studs, balanced etc.

Seattle Ducati is doing the install on my Foggy Monster today. Tuning to follow (after ports put in my exhaust pipes for A/F)

[sburns2421]

Do you have a dyno graph yet?

[Monster_Man]

What are Bruce's expectations for the motor?

What ecu did you go with?

The reason I ask is, I have been having hard starting issues with my 1036 Foggy and Commonwealth feels it is an issue with the FIM ecu/ 12amp battery. Something to do with the motor not turning over fast enough for the ECU to advance the spark.

The solution so far seems to be a Nemesis with a 14amp battery and have Bruce put his magic touch on it.

[foggy123]

Going with a PCIII and stock ecu to start.

There isn't a Nemesis for a S4 so not sure how you would go about that.
Will be installing a Odyssey battery if starting is an issue (works on my 998r with high compression so should work on this bike)

Bike should be together tonight if exhaust bungs are in then tuned tonight/tommorow.

[Rice]

Cool engine build.
I was just at DucSeattle on the weekend.
Too bad I didn't know your bike was there, would've liked to have a peek at it.

Anyone interested in a brand new, Termignoni 50mm full system, for a monster?

[Ben710]

Nice mate,

if I may ask, how much was the crank and the balancing?

Was there anything else to be modified?

1080 is very nice.

[vij]

Originally Posted by foggy123

Bruce Myers of Myers Performance built me a 1080 Desmoquattro motor.

Specs: 996 St4s motor, 1000 DS crank, 506 cams, S4 MBP red heads, Motowheels slipper, BCM studs, balanced etc.

Seattle Ducati is doing the install on my Foggy Monster today. Tuning to follow (after ports put in my exhaust pipes for A/F)

That sounds like it will be a nice tractor
I guess that 1080 is 98mm more and 71,5mm stroke. Nice.

The stroke with 1000ds crank is 5,5mm longer than stock so normally you will need to shim the cylinderbase 2,75 more them stock or approx 3,15mm.

How did you solve this?

Are you running stock pistons or some custon pistons with wrist pins higher up in the pistons?

What rods are you using? Shorter carrillos?

When I did my 984 (68mm stroke) I had some issues with clearance conrod to timing shaft and conrod to crankcase so it needed some trimming.

Let us know how she runs. Sounds like an interesting engine with looooods of grunt.

I guess that if it works good with a 1000 ds crank it might be possible to go 100mm bore that will give 1122cc. How cool would that be in a monster

Jocke..........

[foggy123]

Bruce put the motor together so some of the questions I can't answer.

This is what I know or think I know.
*Used ST4s motor in good shape (starting point)
*Cylinders were shimmed ~3mm to accomodate stroke.
*Some grinding on internal case was needed to fit the crank.
*Running stock pistons/rods as compression is an issue with the 916 heads (13:1) 1.1 mm squish
*1122 was considered but money doesn't grow on trees yet but maybe in the future.
*I got the crank used with rods for ~200 balancing was ~300. They had to add a little weight to the crank as the 996 stuff was heavier.
*9500 RPMS will be my new redline. 10k is when the rev limiter hits on my bike.
*Valve checks will be more essential (3k)


Seattle Ducati has to get bungs mount before tuning (hopefully today).

[vij]

Originally Posted by foggy123

Bruce put the motor together so some of the questions I can't answer.

This is what I know or think I know.
*Used ST4s motor in good shape (starting point)
*Cylinders were shimmed ~3mm to accomodate stroke.
*Some grinding on internal case was needed to fit the crank.
*Running stock pistons/rods as compression is an issue with the 916 heads (13:1) 1.1 mm squish
*1122 was considered but money doesn't grow on trees yet but maybe in the future.
*I got the crank used with rods for ~200 balancing was ~300. They had to add a little weight to the crank as the 996 stuff was heavier.
*9500 RPMS will be my new redline. 10k is when the rev limiter hits on my bike.
*Valve checks will be more essential (3k)


Seattle Ducati has to get bungs mount before tuning (hopefully today).

Nice.

I dont think that the valve checks will be an issue.

506 cams might be a bit agressive but as long as you keep the RPM down it would not be any worries. 748Rs has a life at 12000RPM. Your might mainly be between 6000 and 9000.Do you have MBP collets? If not it might be good to add.

Here are some interesting reading regarding 596 in a SPS

Wear report on 996 with 748RS cams

My MBP 985 will get 506 inlet and 996sps inlet as exhaust during the winter. Will be interesting to see what it does. What exhaust cams are you using?

Jocke...........

[sburns2421]

Originally Posted by foggy123

Bruce put the motor together so some of the questions I can't answer.

This is what I know or think I know.
*Used ST4s motor in good shape (starting point)
*Cylinders were shimmed ~3mm to accomodate stroke.
*Some grinding on internal case was needed to fit the crank.
*Running stock pistons/rods as compression is an issue with the 916 heads (13:1) 1.1 mm squish
*1122 was considered but money doesn't grow on trees yet but maybe in the future.
*I got the crank used with rods for ~200 balancing was ~300. They had to add a little weight to the crank as the 996 stuff was heavier.
*9500 RPMS will be my new redline. 10k is when the rev limiter hits on my bike.
*Valve checks will be more essential (3k)


Seattle Ducati has to get bungs mount before tuning (hopefully today).

I have two questions about the 916 heads.
1. Does the ST4s stud spacing accomodate the 916 heads (IIRC the stud spacing changed 916 to 996, but I could of course be wrong)?

2. Do the stock valve sizes on the 916 heads limit breathing?

[foggy123]

506 exhaust cams. Bruce usually recommends SPS exhaust but that is what I sourced and with the extra displacement torque shouldn't be a problem.

MBP collets, 36/30 valves, ported/polished red heads.

Heads were modified to fit 996 stud spacing and opened up a bit to lower compression.

[vij]

Originally Posted by foggy123

506 exhaust cams. Bruce usually recommends SPS exhaust but that is what I sourced and with the extra displacement torque shouldn't be a problem.

MBP collets, 36/30 valves, ported/polished red heads.

Heads were modified to fit 996 stud spacing and opened up a bit to lower compression.

Nice. Do you have any dyno runs from previus editions of the engine?

Did you run it 916 with the red heads? What cams? Stock pistons? What exhaust?

Would be interesting to see how it compares to my redhead S4.

How are you going to attack the fuel problem? My S4 makes 129 for the moment and is seriosly running out of fuel. It looks like the singel injector limit is just above 125hp.

Higher fuelpressure or different injectors?

Jocke.......

[foggy123]

With the MBP heads (stock pistons and S4 cams) it dyno'd at the wheel at the same HP as a 996 with pipes. (110-120 depending on dyno) Stock Foggy 45/50 exhaust.

Latest word is finding a welder to install bungs is an issue but will be going with larger bungs for individual mapping of cylinders.

[vij]

Originally Posted by Monster_Man

What are Bruce's expectations for the motor?

What ecu did you go with?

The reason I ask is, I have been having hard starting issues with my 1036 Foggy and Commonwealth feels it is an issue with the FIM ecu/ 12amp battery. Something to do with the motor not turning over fast enough for the ECU to advance the spark.

The solution so far seems to be a Nemesis with a 14amp battery and have Bruce put his magic touch on it.

What ECU or chip do you use? It should not be to difficult to get an updated chip or ECU map with less advance during engine start.

If you are running U59 it is just a click on a button

Jocke.........

[Ben710]

Any update on the 1080 dyno graphs foggy123?

[vij]

Originally Posted by Ben710

Any update on the 1080 dyno graphs foggy123?

Yea we need an update on how it is going

Jocke.........

[foggy123]

Seattle Ducati is finishing the dual map tomorrow.
Pre lim numbers ~126hp/84torque

On their machine other models do this
996 108/74
1098 145/84
1098r 153/90

Runs, idles, starts well. graph shows over 75ftlbs at 4200 all the way to 8500

[foggy123]

scanned this

http://www.speedzilla.com/forums/pho...le=2040&size=1

[foggy123]

1080 vs. 1098

http://www.speedzilla.com/forums/pho...le=2041&size=1

[ducxl]

Foggy123 said:

"Seattle Ducati is finishing the dual map tomorrow.
Pre lim numbers ~126hp/84torque

On their machine other models do this
996 108/74
1098 145/84
1098r 153/90 "
.................................................. .........................


The 996 quoted above is a stock configuration right?

I'm trying to relate that stupendous 1080 engine to my own BCM Ducati 996 engine with ported heads,SPS cams,13:1 Pistals.

Of course,i can only speculate here but,i was told to expect somewhere in the mid 120HP range.THat 1080 dynoe'd at 126?

Something seems amiss...Or is the 1080 solely about increased torque?