The all carb diet.

[B4S]

My Rowland single sidedraft manifold is at the post office, awaiting my arrival tomorrow morning .

Now...run the duals for the summer and make it to the show next weekend, or swap it all out and hope it goes smoothly?

I won't be able to sleep tonight!

[B4S]

A package from South Africa arrived yesterday...

I can't say enough good things about Rowland Manifolds in SA, the customer service is top notch, and it arrived in 8 days. After a local show next weekend I'll be swapping to a single carb...mainly because I can't leave well enough alone (and I happen to have a set of Mikuni sidedrafts just sitting around doing nothing) .

[idrivemyself]

Am I seeing only one port for vacuum on that new manifold? Any plans to change and/or correct that? Best of luck with it either way.

[B4S]

I plan on drilling out that port, as well as drilling the second barrel. I'll use an NPT thread tap, to make it easier to find fittings. I'm going to run both ports to the brake booster, since I don't need more than one vacuum line (CIS-E knockbox) and the check valve on the brake booster line provides that. When I swap to the above manifold, I'm removing the knockbox and planning on setting up a Megasquirt as an ignition controller.

[B4S]

it's a bit windy...

http://www.youtube.com/watch?v=dbVdLZZU7Tk

[B4S]

Oh, also upped the idles to 65 from 58 (damned emissions carbs) and moved to 190 airs. The main circuit was coming in too early and making my cruise AFR a bit too rich, but the larger airs will hopefully take care of that. Also, it needs leaning out up top, I'm at about 12:1 at WOT. Outside of that, I think I'm good to go with the jetting...for now .

130 mains
190 airs
65 idles
32 chokes
42 pumps (might need to go larger on these)

[B4S]

LOL!
Well...turns out you really should DRIVE the car before settling on the jetting. I had no choice but to drive the car to the glass shop for the new windshield since the installer couldn't get it in ( ), and it was a 15 minute jaunt from my place along country roads. Even though I was barely able to see through the spiderwebbed glass in my car, I had a chance to watch the wideband...and it's rich (11-12:1) under 2200, and less rich (13-14:1) above 2200. So I'm assuming then that the mains kick in somewhere around there, and that the idles are faaaaaaaaaaaaar too big. I've still got some tuning to do, obviously, but I think it's close. I'm going to swap the idles back to the 58s that were in there originally, and see what happens. My main circuit seems to be pretty good, I'd prefer a leaner cruise, but I'll take what I can get that'll still leave me with a 13:1 WOT reading.

(Oh yeah, got my 45 & 50 Mikuni pump jets, and a 1.8 needle, for the single carb setup. Big to Todd at Wolf Creek Racing)


Modified by B4S at 8:33 PM 8-7-2008

[four2err0r]

ok im planning on running a single carb like you b4s. here it is.

todd hooked me up with a lot of jets to help my tunning i would like to know what ends up working best.

and here is my ? can i set up my stock ignition to run with a carb?

[B4S]

Well, it would help to know what your stock ignition is .
MkI, MkII, MkIII?

If it is an 81 caddy like in your profile, then it'll have a vac advance dizzy if it is stock. You can run your stock ignition for sure, but you'll lose the benefit of the vac advance, unless that vacuum port on your mikuni is ported vacuum and not manifold vacuum. I think it's ported...but not sure. If it is, then you can hook up your dizzy vacuum line to it. The spark will fire off fine, but a hotter ignition will help a lot.

[four2err0r]

yes it is a vac port. ill get a new coil asap.

[WhiteG60]

Whats everyone's opinion Solex carbs? I have a CRAZY deal on 2 barely used 40mm side draft solex's on a manifold with a pretty killer linkage for $200. They were on a 1.6L Scirocco that dynoed over 130whp.

[candm]

b4s- those 65 idle jets are way fat. you shoudnt need bigger than a 55

[B4S]

Yeah, I learned that one the hard (and expensive) way, lol. Mine are emissions carbs, with a pre-drilled idle bleed though that is the equivalent of a 220 air on the idle side, as well as 5 very large progression holes. I'm going to try the 58s first, then test out the 52s or 46s I have. My hands are tied right now, since the car isn't with me, but tonight I'll HOPEFULLY have some more info. I'm going to order a megasquirt over the winter, so that I can run a mappable ignition and datalog everything . The carbs are staying though (or carb, depending on how it goes).

[impulse byer]

Look's good B4S If you want to get rid of one of the counterflow mani's LMK

Mine 2.0L 16V duel 40's mm's, mild head work, stock block (280km's ) 150whp and can daliy it all you want with great gas mileage spring to fall

and a vid...
http://www.youtube.com/watch?v=OuY6wXW7ZU0

I think i will go and put in my other set of cams just for fun Thats the only think i miss with carbs lumpy idle with big cams This thing idles smooth at 900-1000rpm with 276 shrick's. Oh well the 283/279 Cats might bring it back a little. :

[Shawn B]

Not mine but the owner is part of our club:

[WhiteG60]

Just got my dell's all done and rebuilt.

None done:

One done:

All done:

Just need to get new idle mixture screws.

[B4S]

Mmmmm, delicious!

[littlewhitebeast]

ill play. my baby dellorto FRD 34B's

[B4S]

I saw that thread in the Mk1 forum...I love the idea of using alternate carbs. I'm going to try a set of S.U. carbs next .

[littlewhitebeast]

haha thanks they run pretty damn good

[B4S]

DAMN! I'm in LOVE! What was the lower manifold that you used? Just a stock MkI version? I seriously dig that dual downdraft setup, and Beetle parts are CHEAP .

[littlewhitebeast]

the lower part of the intake is actually a weber intake i was able to cut on the table saw. uppers are from a 70's bus

[the12for12]

this thread is

DRY-HUMPING certified !!!!!!!

[littlewhitebeast]

this one shows the intake a little better

[B4S]

Coolness...not sure I'd feel too good about hacking up a sidedraft manifold, but the end result sure does speak volumes for the creativity of the builder . My hat is off to you sir!

Lets keep the carbs coming, in all shapes and flavors! .

[littlewhitebeast]

thanks man. alot of time went into just the manifold. the lower is actually from a weber downdraft carb.

here is the old setup

[B4S]

Ah ok then...this gives me ideas .

*hunts down old downdraft manifold in parts bin*

[littlewhitebeast]

DO IT!

[the12for12]

exactly what was done to run my DHLA Dellorto downdraft application. Complete intake fabricated from junk bin stuff, Udig?

Pix available if needed

[B4S]

That could be very cool to see. I was on the hunt for an IDF or DRLA manifold for a while, before I snagged the Rowland single.

[the12for12]

Quote, originally posted by B4S »

That could be very cool to see. I was on the hunt for an IDF or DRLA manifold for a while, before I snagged the Rowland single.

never mind the fuel nipple its homemade until I find a real one

[B4S]

Coolness!
Oh man...this thread is bad for me. By spring I'm going to have sooooooooooooooooooo many setups to try out, lol.

[impulse byer]

I've seen these on offroad buggy's i think? anyone

[the12for12]

Quote, originally posted by impulse byer »

I've seen these on offroad buggy's i think? anyone

Correct that DHLA intake is from the offroad scene

[VenaGTi]

wow. cool set-up. does it fit under the hood?