Weber 48IDA on Stockport 12a
 

Ok, so looking at RacingBeat's recommendations for the 48IDA setup, it should not be bolted to a 12a stockport. The "lowest" it can be bolted to is a 12a StreetPort.

Venturi: 37mm
Fuel Jet: 170
Air Jet: 150
E-Tube: F-11
Needle Valve: 250



I know it would probably not work with a stockport (and will probably end up with SP jetting) but what would be "comparable" jetting for a stock port?

see if you can find the jetting specs for the dellorto dhla 48mm they sold. I had this on my stock 12a wit hr.b jetting and it did great hell it helped out my mpg even. then after i built my large street port 12a i just rejetted it and blam. I had a a/f meter and if i ran the stock port jetting it would run lean on the higher rpms but did fine under normal driving. i even kept them in a ziplock bag in the glovebox so i could rejet when i was going on a long trip.... mpgs. I was getting over 20mpg on the stock jetting and around 12mpg with the jetting i had for the street port.

I had 34mpg in the city with the Nikki. I got a buddy with a Dell 48, I will see what jetting he had. The thing with Dells, is that the 48 is equiv to a 47 weber. Oh well, I was going to run SP jets with my Stockport, so it shouldn't be bad.

I'll let you guys know what jets he has, for searching things.

a good starting point:

40 venturies
150 air
200 main
65 main jet

be sure to ditch the filter @ IDA's inlet.

Too bad, I couldnt find the video when my bro's SA went heads up with a S2000 on the freeway. This with a stock 12-A, 48 IDA and dual exhaust (used a stock motor after he blew the 12-A monster streetport).

im about to pick up a nice gs with a stockport rebuild with 10k and it's running a weber 48 and it runs great. it seems like that would be a little bigger than the dellorto 48 but i dont know what jets he's using.i'll try and find out if you want.

Thanks wacky. I got everything but the filter comment. Are you talking about the screen filter inside the carb?

Yes please!

Yes he is..and drill out the inlet to the fuel bowl....am running a 48 IDA on a large SP 12A and it is way too much fun....getting shitty mileage atm, but after I change the jets, it will easily get 200+ miles on a full tank, depending on your right foot....

Inlets for the fuel bowl? I haven't heard of much modifying for the IDA, besides the 3rd progression hole and adding a fuel bowl extension...

I assume you mean to enlarge the passage in the carb where the fuel gets into the bowl? Wouldn't I need a larger needle?

PS: Currently rockin out on 400+ miles a tank if I can keep out of it :)

400 a tank, Jeezus is right! porting = yummy fuel.
But yes, under the screen, the tapered hole can be bored out....needle doesn't NEED to be swapped on stockorts, but I recommend a #300 needle. Not a fan of Grossejets...

Haha, yeah. I am gonna miss the fuel mileage, but that is why I have my daily driver.

EDIT: This is the IDA thread, not the QJet...

Jeezus
here are some links i followed when i picked up my 48ida, give them as read through and pic and choose what you feel like modifing

these guys make it to the 51 ida but all the mods are here
http://www.vwtrendsweb.com/tech/0308...ce_weber_carb/

heres a good one on general rebuilding
http://www.aircooled.net/gnrlsite/re...idarebuild.htm

Your comparing sidedraft to downdraft. Different beasts but the Dell is a 48mm carb. Bolts to the same flange as weber DCOE.

Go to this link to see what the jetting for stockport and SP 12as are for Dells gruntled.

Maybe you get that IDA on your stockport and you can keep up with me on the next meet :)

I'm no expert but wouldn't a 48 ida be huge for a stockport 12a? Unless you run smaller jets etc... I only thought you'd run an ida on an extend port or above? People over here just run jetted nikki's/ 4 barrels on the smaller ports.

thats the advantage of a 48 IDA. It has removeable venturies so it will work on most application. You buy it once and thats it. I use a nikki carb as a door stop. :lol::lol::lol:

Yes just use the 37mm chokes and no it's not too big a carb. Jet it and you'll be fine. Great carb. Throttle response amazing.

Haha bloody rich americans :lol::lol: send a few 'doorstops' over here you'll be able to fork them off for some $$$

Hey wack, would the F11 Etube be good?

Also, how did the 7 do against the S2000?

F11 is the de facto etube for rotormotor.

f-11 is great for stock port driveability adn good gasmileage, but it will cause transition problems especially on a stock port 12a. you'll get good gas mileage, but you're going to have a lean stumble at 3000 rpm cruise. If you want to get rid of the cruise stumble you will have to degraded gasmileage.

^^If I lose mileage thats alright. I want the jets and whatnot to be "tuned" more for mid to high RPM.

I am going to go with what Whacky says:

40 venturies
150 air
200 main
65 main jet (is this idle jet? 65F9? 65F7?}
F11 emulsion tube

Looks like I have:

F7 emulsion tubes
135 main
120 air

F10/70
120

I'll sell you my f-11's for $35 shipped. I don't want them anymore... pm me

Bump. Going to be getting my jets in this week. I am ready to order the parts, but the Main Jets are holding me back. Do I get the 65F9 or what 65F#?

Also, I do not want the 3000 rpm stumble, so if I lose a mile or two a gallon that is fine. After F11 the next rich e-tube is the F7, correct?

I am sooo ready to order this stuff and get her on!