1.9 8v twin 45s

[tonyjohnson]

morning, i am in the middle of building my engine and i am looking to put carbs on hopefully twin weber 45s dcoe, really what i want to know is are these carbs anygood

matched pair of 45s weber dcoe
45 DCOE 152

CHOKES-- 36MM

AUX VENTURI-- 4.5

EMULSION TUBE--F16

MAIN JET--145

AIR JET--155

IDLE JET--F8/55

PUMP JET--45

the engine spec is

tes 1.9 big bore block
gas flowed head
newman fast road cam
four branch manifold

any help would be great

[danny_p]

no idea  how much has been done to the head or what cam you have,  but 36mm chokesshould be about right.    it'll run but no idea what the optomum jetting will be,  rolling road or try ringing souther carbs and they may be abel to send you some that are close.


doce's on a counterflow 8v  can be a pita tho

[tonyjohnson]

what do you mean dcoe can be a pita?

[danny_p]

pain in the arse.       look at where they will be,   not a pritty setup but dose work. works well for some i never cot on with them on counterflow heads tho

[sidecarphil]

when i was doing my XR3 zetec i was looking at twin webbers till some crazy white haired old man called dave bogg shuved a set of bike carb's under my nose

once bike carbs are jetted that's it , no need to set them up every other week like twin webbers and they give more power

but your fuel ecconomy is poop as all you do is floor it every where  listening to the carbs snort !!!

[dan_apps]

had dcoe's on my mg and they were a fookin nightmare to live with, could never get them right with air and fueling, in the end i got rid of them and went back to std's! why do you want them?

[tonyjohnson]

i just love carbs i have had some extremely fast cars in my time but i love the sound of carbs so i thought i would go back to them, or maybe just strap a bottle of nos to it and have some real fun, 

[re2]

if you really want carbs, then get a crossflow head and make it worthwhile. All you do is suck the hot sh!t air from the bulkhead and you are only mm away from that so the air availability is rubbish. Thats why they are a bugger to live with in the first place. DCOEs are well proven carbs in a variety of marques, but the standard 8v set-up is just not suited to them

[danny_p]

some installs ahve a very nasty habbit of boiling fuel in the float chamber.    that causes sh!te running and MASSIVE fuel consumption.

on 16v's and presumably crossflow 8v's wher they out frount in the nice cool air with space to breath and fit decent filter with ram pipes they can work really really well,    if really want a carbed counterflow 8v  downdraft cars are optimal 

[re2]

try and find twin downdraft carbs for an 8v though! Rare rare and really rare to find, so you are best with a crossflow head, and like damnny says, its just too hot for dcoes that are sat directly above the exhaust manifold. The only kinda way around it is the dreaded bonnet scoop to force enough air down over the carbs and this will also reduce the exhaust heat effect- but it will look very scooby. You will also need to ceramic coat the manifold and lag the downpipe. 8v's are not suited to sidedrafts and thats why there is so much slagging off of this set up. They just do not produce the power that they should do.