Dellorto! (and possibly other parts?) By cdoublejj (Read 417 times)

[cdoublejj]

Now that is a name brand i have definitely heard of.

www.mbe-motorsports.com/catalog/product_info.php/cPath/19_106_2/products_id/436

www.mbe-motorsports.com/catalog/index.php/cPath/19_106_2

that definitely caught my attention. Dellorto used be better know back around the 70s, apparently they made some quality parts.

not only this it's only about 1mm larger than the stock 16mm carb, which with my small bore project might be a good fit.

now i'm not sure if this has a butter fly and slide like the stock ones do or why exactly the stock ones have a slid AND butter fly.

i've been scouting out parts that might might fit my build that i'd like to continue in the near future. Perhaps i should have made 1 thread instead of several. perhaps if i find any thing else i can post it in here.

the only thing better would be a stock looking high performance quiet pipe to go along with the other mods

[LUKE]

just want to verify, is it dellorto or desoto???


magoo

[Bashan]

Jun 21, 2013 7:56:40 GMT -6 cdoublejj said:

i'm not sure if this has a butter fly and slide like the stock ones do or why exactly the stock ones have a slid AND butter fly.

I am no expert on these so anybody please jump in to clarify. The sliders do not have a butterfly or vacuum slide. The throttle cable pulls a slide open which allows more air and then the venturi effect pulls more gas out of the bowl. The advantages are quicker response and no obstruction of the carb throat. These usually have an accelerator pump to compensate for the lag of the venturi effect.

The constant velocity (CV) carb uses the throttle cable to open a butterfly valve that allows more air in. The venturi effect causes a vacuum in the dome which pulls a slide up which is attached to a jet needle. This allows more gas in through the main jet. The advantages are the CV carb provides some compensation for altitude and temperature. The disadvantages are slower response time and the obstruction of the vacuum slide.

The slider carbs do not have a vacuum dome or butterfly, the slide handles these functions.

[cdoublejj]

i also wonder if the CV is used so as to not stall out. the scoot is pulling all that weight on a CVT, so i was thinking if you had a straight up slide and cranked the throttle back as fast as you could, the engine couldn't accelerate fast enough causing a lack of vacuum at WOT on take off thusly causing it to stall out and possibly die.

I wonder if the vacuum dome is what the vacuum line is for? in that case does the slide stay up when running or above certain rpm?

[Alleyoop]

No the Vacuum line is for the ACV valve that is to allow fuel to be sucked in when you suddenly close the throttle so it does not run lean as it is dropping rpms fast.
The slide moves up and down according to the amount of throttle which controls the amount of air.
Alleyoop

[cdoublejj]

why would it need to control air? i think it's to keep the intake suction strong so it can suck air and fuel because the engine can't spin up that fast with all the stuff the crank has to pull and spin.

TL;DR throttle response and some how air temp and altitude?


correct me if i'm wrong. However with mine when ever it got colder i made more power, perhaps the slide wasn't doing it's job or can only compensate so much?

[Alleyoop]

ALL motors make more power when the temp is colder that is because of the density of the air and the fuel mixture create a bigger BANG PER GULP. That is 101 of motors and in HOT temp you loose power it is a given. The way the cars now adays compensate to some degree is they advance the timing to not loose so much power.

On any day you can say leave for work and it is hot and the motor will not have as much power but after work after the sun has gone down or the temps have dropped going home you will notice the motor has a little more power.

As you open the throttle(on the CV carbs) the air rushs in and more air gets into the DIAPHGRAM CYLINDER and pushs the rubber diapghram up and lifts the needle out of the Defuser to allow more gas to be sucked in along with more air.
Alleyoop

[Alleyoop]

MBE are in CANADA and you pay through the nose for shipping. I wanted to order an item and went to checkout and HOLY BANANNAS the shipping was ridicoules I emailed them and asked why so much for shipping and they explained. I canceled and found the product elsewhere but not CANADA haha.
Alleyoop

[cdoublejj]

are there parts or any of their parts of higher quality ?