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Littlelina
helloo - cage is done (minus few piddly details)
pretty much all TIG welded
still needs paint
I had to "settle" for yokohama 13" advantage rally tires and powder coated all sets of wheels, grill and bumpers in "new white" sooo pretty. taking a longer than desired break after the cage work was done (*for health reasons) but planning on attacking the remaining metal fab, paint, armor (oh , did I mention it's been running this whole time?) I did ebay score some weber 40s side drafts that are begging to be installed
thanks for asking!
LL

as they say on the internetz... Pics or it didnt happen!

PS congrats and get well soon, that sounds ouchy.



Edited 1 time(s). Last edit at 01/22/2013 07:26PM by alkun.

Im sure he said or meant 45s but Im a conservative when it comes to power mongering (learned this from my v8 and holley vs carter days....
so when I went home and saw the shiny well priced Buy it now! item figured 40s was good enough to start rip-snortlets ;-) it also came with the manifolds and that was a plus - the current application is 36 that sits on some long intakes (which I know adds a lot of the percieved torque)

hoopala! this was from the in-progress time...

some rumble (crumble) strip action for Andreas Erikkson out at LVMS

John is right, the 40's are only good for a street car that spends life in the 1000-3500rpm range.

Und zee vorst prroblema about yorr little Fabbrica Italiana Carburatori Weber DCOE40 is that zee only sing 40mm on zat carb is zee throttle blades, the actual ventury size is probably 34 or 36 at BEST, so you getz low flow YA?


As for the brakes ummm... single plane 240mm x 10mm discs on the front??? WTF mang? The brake pedal is going to hit the firewall in 5 minutes. Especially if using them mad tyte left foot braking tecknikes. No bueno Linasita.

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Cosworth
John is right, the 40's are only good for a street car that spends life in the 1000-3500rpm range.

Und zee vorst prroblema about yorr little Fabbrica Italiana Carburatori Weber DCOE40 is that zee only sing 40mm on zat carb is zee throttle blades, the actual ventury size is probably 34 or 36 at BEST, so you getz low flow YA?


As for the brakes ummm... single plane 240mm x 10mm discs on the front??? WTF mang? The brake pedal is going to hit the firewall in 5 minutes. Especially if using them mad tyte left foot braking tecknikes. No bueno Linasita.

Non non non mon sewer, if the carbus de Weber were found here en L'Anmerique, I will be the venturi are max 32mm...

That's why it is maybe only 5% more poop than a DGV..

And I tried to say that the front disc were really better used on a machine comme ca:


mais elle ne veut pas écouter

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

Vous avez raison mon ami. Il sait tout!!!

Quote
Cosworth
Vous avez raison mon ami. Il sait tout!!!

pas vrai, mais je sais que certaines choses vraiment bien

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

come again?

the carbs come in a set of two - is that still bad to have a double carb set up
hahaha ... wont that mean a 10% increase then?

Various Weber books give a chart dealie about venturi size vs. air demands at various RPMs. For a 500cc cylinder, with the biggest venturis you can stuff in a 40DCOE (36mm) supposedly it's good for peak HP at about 5-5.5k RPM. I'm not an expert on the make or anything, but I'm coming across references to the 2002ti coming with a pair of 40mm Solexes (pretty much the same thing) and peaking at 120hp at whatever compression. A normal DGV has less total venturi area than a pair of 40 DCOEs, sure, but the manifolds are setup completely differently so it's not comparable.

Food for thought.

Biggest feasable choke size in a 40mm DCOE Weber is 34mm, even though there are larger sizes. Anything larger than that and the auxilary venturi effectively becomes the restricting factor rather than the choke itself, and it also reduces vacuum and the venturi effect making jetting more awkward and compromised.
Dellorto's auxillary venturis are supported by a single "arm" so may cope slightly better with a larger choke size and seem to have a more accurate fuel metering system with more intricate emulsion tube and jet designs.

Also different engines work in different ways so there are no real hard and fast rules regarding max output for a given choke size. Seen some 2.0 engines with 180 bhp wearing a set of 40s with 33mm chokes and had great torque with it.
A decent inlet manifold design and runner length can make a big difference to how well it performs.

---

Disappointingly not yet a Jackass

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mekilljoydammit
A normal DGV has less total venturi area than a pair of 40 DCOEs, sure, but the manifolds are setup completely differently so it's not comparable.

Food for thought.

Reading things on books doesn't always teach you everything. Total area of a DGV feeds the whole engine but only one cyl sucking air at a time, so the total area of a DGV still supports more total flow than a DCOE does per individual runner. Things do get a bit more complicated after that, so its not an easy peasy measure the TB blades and wham bam thank you ma'am.

Quote
Cosworth
As for the brakes ummm... single plane 240mm x 10mm discs on the front??? WTF mang? The brake pedal is going to hit the firewall in 5 minutes. Especially if using them mad tyte left foot braking tecknikes. No bueno Linasita.

I'm pretty sure the rotor on the back of my last drag car was larger. Yikes.

Quote
Cosworth

Quote
mekilljoydammit
A normal DGV has less total venturi area than a pair of 40 DCOEs, sure, but the manifolds are setup completely differently so it's not comparable.

Food for thought.

Reading things on books doesn't always teach you everything. Total area of a DGV feeds the whole engine but only one cyl sucking air at a time, so the total area of a DGV still supports more total flow than a DCOE does per individual runner. Things do get a bit more complicated after that, so its not an easy peasy measure the TB blades and wham bam thank you ma'am.

That was my point, yeah. Run into that with the 12A rotaries; weirdly enough the little 4-barrels are setup one barrel per port. Even weirder is the Racing Beat Holley manifolds are setup the same way, so the carbs sold with them are jetted completely strangely compared to normal, and are of a disproportionately huge size.

I'm really tempted to try to model what the emulsion tubes are doing so I can tune other than by "well, this one made the air/fuel curve weird" but then I remember how much I've grown to hate carbs.

Quote
mekilljoydammit
Various Weber books give a chart dealie about venturi size vs. air demands at various RPMs. For a 500cc cylinder, with the biggest venturis you can stuff in a 40DCOE (36mm) supposedly it's good for peak HP at about 5-5.5k RPM. I'm not an expert on the make or anything, but I'm coming across references to the 2002ti coming with a pair of 40mm Solexes (pretty much the same thing) and peaking at 120hp at whatever compression. A normal DGV has less total venturi area than a pair of 40 DCOEs, sure, but the manifolds are setup completely differently so it's not comparable.

Food for thought.

As modest as the ventrui area in a little DGV is (26/27?) there are 2 barrels feeding into an open plenum from which each cylinder is drawing

Area of 26mm= 520.6mm²
Area of 27mm= 572.2mm²
zusammen........1092.8mm²

One 36mm--biggest available for 40 DCOE=1017mm²

That is why us guys who are rally type pervs---as opposed to Sterling Moss' old guys---are fond of the Weber 38 DGMS with synchronous opening and 2 x 28 venturis or 40DFI-2 with 2 x 29mm venturis or my old favorite, 40 DFI-5 with 2x 32mm venturis

area of 32mm = 803.8 x 2= 1607.6mm²

On a decent manifold with good short side radius that's nearly 60% more area...
One of those on a good little 1740 V4 gave a torquey 128bhp

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.