Project Varatrackerstorm or Firetrackerdero.

[Varastorm]

I'm currently using a heat gun to remove old paint from the attic door/hatch, feck me I'm fed up & my arms are killing me.

So I pop onto the computer to see what's what. Then I see Chris's comment

(TMFS )

Lifted my heart no end

At least when your wife sees what you've been spending money on you can tell her you have a Syndrome of some sort

Chris.

Well, hello everybody... my name is Vara....... & I have PH Syndrome

[sirch345]

I'm currently using a heat gun to remove old paint from the attic door/hatch, feck me I'm fed up & my arms are killing me.

So I pop onto the computer to see what's what. Then I see Chris's comment

(TMFS )

Lifted my heart no end

At least when your wife sees what you've been spending money on you can tell her you have a Syndrome of some sort

Chris.

Well, hello everybody... my name is Vara....... & I have PH Syndrome

it could be worse

Have you finished stripping the paint of that attic door yet

Chris.

[Varastorm]

At least when your wife sees what you've been spending money on you can tell her you have a Syndrome of some sort

Chris.

Well, hello everybody... my name is Vara....... & I have PH Syndrome

it could be worse

Have you finished stripping the paint of that attic door yet

Chris.

Pfff.. just back from the doctors Chris. Bad news I'm afraid.

After an hour sitting in the waiting room watching sick abusers & other degenerates roaming around aimlessly It's my turn to see her. In I go & explain my issue.

She said I was a lost cause & there was no tablet/medication that could cure Pikey Hoarder syndrome.

Yur doomed lad

So off home I go & blow me on arrival, the Parcel force truck driver is at my door with a parcel...

After a quick finger squiggle & a Merry Christmas hug the driver pushes himself off me, jumps into truck & hurriedly locks the van. Never seen anyone driving away & keeping eye contact for so long

In I go & place the parcel on the table & slowly unwrap













They are a set of "Italian" Weber 50dco/sp's. On closer inspection they look like new old stock.

They are the largest I can go carburetor size wise as the inlet manifold is 50mm diameter inside also.

These are fitted with 46mm chokes & should be good for 8300rpm before running into issues.

All the reading I've done about the Weber dcoe series carbs point out the fact that the choke size dictates were max power will be.

I also read that every application is different & tuning for top end power will compromise low end tractability & vice versa.

Now that I have 40, 45 & 50 dcoe's it should hopefully be possible to tune each one for what I want from the bike.

See, I told you I'd been a good lad

Right then, what else do I need

[tony.mon]

What is don't understand is why you are fitting carbs that restrict the rev limit?
Have I missed something?

[fabiostar]

i bloody love this thread

now get away out into that mancave we need updates, those carbs are top class looking

[Varastorm]

What is don't understand is why you are fitting carbs that restrict the rev limit?
Have I missed something?

Hi Tony, it's not me purposely choosing carbs that'll restrict the air flow, it's the price of the things that's restricting me

The bigger the carbs the bigger the price. I never dreamed I'd get my hands on a 50 dco, never mind a pair

Here's the chart I'm using as a guide. This is on the theory of one choke per cylinder "500cc"

[tony.mon]

Yes, I saw the chart, it looks like you'll run out of carb before you run out of revs!
I suppose what I was leading up to was why you chose the TC Weber rather than Firestorm carbs, or something similar.
I had an idea a while back to try to get Ducati 888 fi on to a Storm engine, they look to be big enough throat size wise.
You would need crank position and cam position sensors fitted, but not impossible.

But then, simply using the Duc engine or the whole bike would probably be less work.

[Varastorm]

Yes, I saw the chart, it looks like you'll run out of carb before you run out of revs!
I suppose what I was leading up to was why you chose the TC Weber rather than Firestorm carbs, or something similar.
I had an idea a while back to try to get Ducati 888 fi on to a Storm engine, they look to be big enough throat size wise.
You would need crank position and cam position sensors fitted, but not impossible.

But then, simply using the Duc engine or the whole bike would probably be less work.

The whole idea was to get the fuel tank as low as possible & at the time I had a set of 40 dcoe's to hand. So I decided to run with them & it's just grown from there really, I don't even know if it'll run with them.
My conclusion after reading forum after forum & buying many Weber tuning books is that it should work, but how well is another thing.

Do Weber 48mm chokes flow the same as 48mm Vtr carbs? I dunno

I know they're different beasts but when the butterfly's are wide open at full chat do they flow the same amount of air as each other? If so, then going by the chart they look like they're both too small

The Varadero carbs are 42mm & when I ran with them they topped out at 6000rph iirc they just ran out of puff. It still went to the red line but just lost its urgency. So with the 50 dcoe running 46mm chokes & jetted correctly it should have a similar result as the Varadero, just a little higher in the rev range.

More food for thought is that the slick looking FCR carbs that I've seen fitted to VTR's were only 42mm. I've never read a thread about anyone that fitted them or how well they ran, but it'd be an interesting read.

Also, I have even been thinking about running a pair of Crf 450 fcr's but they're only 42mm too.

Or maybe a Vtr carbed engine running a fake tank similar to a Goldwing effort

Help, I'm cracking up

[Varastorm]

I had an idea a while back to try to get Ducati 888 fi on to a Storm engine, they look to be big enough throat size wise.
You would need crank position and cam position sensors fitted, but not impossible.

But then, simply using the Duc engine or the whole bike would probably be less work.

Another idea I had was to use late Varadero heads (Sensor for fuel injection) then maybe sp1 throttle bodies running a Varadero loom with a power commander to remap

[tony.mon]

Don't know if sp1/2 use crank position sensors as well.

The wiring diagram should reveal all.

If so, the 2 set is better.
Re the late Vara heads, it should be straightforward to just fit the sensors into your current heads, if you have the measurement of exactly where they are positioned.

[fabiostar]

maybe not much help but a while back i was chatting to an Auussie who has a lightly tuned vtr, he went to to FCR42 carbs from the standard 48s in the hope of maybe finding something, from memory once jetted and set up it ran crisper and sharper through the rev range but he lost about 3 bhp right at the top on a dyno. but did say the gains in sharpness across the range was worth the pay off.

[Varastorm]

maybe not much help but a while back i was chatting to an Auussie who has a lightly tuned vtr, he went to to FCR42 carbs from the standard 48s in the hope of maybe finding something, from memory once jetted and set up it ran crisper and sharper through the rev range but he lost about 3 bhp right at the top on a dyno. but did say the gains in sharpness across the range was worth the pay off.

Thanks for that Fab, best info yet on Fcr's

[freeridenick]

maybe not much help but a while back i was chatting to an Auussie who has a lightly tuned vtr, he went to to FCR42 carbs from the standard 48s in the hope of maybe finding something, from memory once jetted and set up it ran crisper and sharper through the rev range but he lost about 3 bhp right at the top on a dyno. but did say the gains in sharpness across the range was worth the pay off.

Thanks for that Fab, best info yet on Fcr's

Yeah, that was my understanding. Flatslides are easier to setup than CV carbs and that was the benefit rather than performance.

It would be interesting to know the size of the Mori kit carbs; were they 48mm too or larger. The info I have on ram air setup showed it maintained above atmospheric pressure all the way through the revs. So whatever size the Mori carbs were they couldn't flow all the air available. The point being, maybe your 50s will be OK.

[fabiostar]

i always thought the mori units were 48s aswell ?.. iv seen results that said the ramair system held +1 atmosphere at 110 mph.

i would like to see a set of the mori carbs on a bench beside a set of storm carbs to be nosey just

[sirch345]

Well, hello everybody... my name is Vara....... & I have PH Syndrome

it could be worse

Have you finished stripping the paint of that attic door yet

Chris.

Pfff.. just back from the doctors Chris. Bad news I'm afraid.

After an hour sitting in the waiting room watching sick abusers & other degenerates roaming around aimlessly It's my turn to see her. In I go & explain my issue.

She said I was a lost cause & there was no tablet/medication that could cure Pikey Hoarder syndrome.

Yur doomed lad

So off home I go & blow me on arrival, the Parcel force truck driver is at my door with a parcel...

After a quick finger squiggle & a Merry Christmas hug the driver pushes himself off me, jumps into truck & hurriedly locks the van. Never seen anyone driving away & keeping eye contact for so long

In I go & place the parcel on the table & slowly unwrap













They are a set of "Italian" Weber 50dco/sp's. On closer inspection they look like new old stock.

They are the largest I can go carburetor size wise as the inlet manifold is 50mm diameter inside also.

These are fitted with 46mm chokes & should be good for 8300rpm before running into issues.

All the reading I've done about the Weber dcoe series carbs point out the fact that the choke size dictates were max power will be.

I also read that every application is different & tuning for top end power will compromise low end tractability & vice versa.

Now that I have 40, 45 & 50 dcoe's it should hopefully be possible to tune each one for what I want from the bike.

See, I told you I'd been a good lad

Right then, what else do I need

What an amazing find

Another option if you're not getting maximum rev's, is to use one twin choke carb per cylinder Not that you want to be making new inlet manifolds I'm sure

Chris.