new to BS34 Carbs & putting them on a my car

[SFerinTEXAS]

Vents

This guy did it. http://www.youtube.com/watch?v=gHEgdZLj3KI

[jonuts]

i would love to see that set up!!! how it coming??
I live north of houston and if you need some jets i have some

good to hear another local member is nearby. i appreciate the offer. hopefully the car will be running soon again. i'd rather run these carbs if i can than the weber 32/36 i have on there from a bmw 2002.

As I stated, I am only really familiar with the XS11 version and these are not the identical beast, but I would suspect that nipple in purple will be the beast.

i'll give it a go.

Hi jonuts,
first, kudos on your endeavor and hopefully the list's carb wizards can help you get yours sorted out.
But here am I wishing there was only one carb on my XS11 so I didn't have to try balancing four of the bastards.
Takes all sorts, eh?

i'm going to make sure to pay attention. thanks for the kudos.

This guy did it. http://www.youtube.com/watch?v=gHEgdZLj3KI

very cool. very cool. i messaged CeliRob for some pointers. hopefully he'll respond.

[oseaghdha]

If you pull the "purple" caps, you are going to have a vacuum leak.
That's not what you need.

[81xsproject]

If I were going to run 70's BS34's on something with a fuel pump, I would definitely upgrade the float valves to Viton tipped ones. If you do a search for Viton, you will find the thread I wrote about what part to order for the better float valves.

[DiverRay]

The fuel system has a "T" after the regulator. Strait through goes back to the tank, and the leg on the "T" goes to the carb inlet. We put two on the Datsun, one for each carb. As you have a single inlet, you should only need one.
Do NOT forget about the brace between the carbs. I would get an aluminum angle at ACE HARDWARE and fit it as a single brace across the bottom. If it's NOT a single brace, the carbs WILL move and cause running problems. We had that with just two carbs!
BTW, those MAY be off a KZ from looking at them.

[jonuts]

The fuel system has a "T" after the regulator. Strait through goes back to the tank, and the leg on the "T" goes to the carb inlet. We put two on the Datsun, one for each carb. As you have a single inlet, you should only need one.
Do NOT forget about the brace between the carbs. I would get an aluminum angle at ACE HARDWARE and fit it as a single brace across the bottom. If it's NOT a single brace, the carbs WILL move and cause running problems. We had that with just two carbs!
BTW, those MAY be off a KZ from looking at them.

good deal. i'll T in after the reg. with one 1 to the single inlet and the other to the fuel return.

yeah, i have the pairs braced separately but have another single brace underneath bracing 2&3 together.

81xsproject, the Z1 site showed the float needle assemblies as being temp. out of stock but i did find this as well as a 2010 Sudco price list in .xls format with them at 8.82ea. They're Keyster parts made in japan. The .pdf catalog shows an image resembling the one with the black seal and flat screen. is that the right one?

this is the image from the Sudco catalog:

[81xsproject]

That does look correct, however, I would use the cross reference list on the z1e listing to make sure.

[DiverRay]

yeah, i have the pairs braced separately but have another single brace underneath bracing 2&3 together.

I saw that, and that is the reason I mentioned a SINGLE brace. With the carbs how you have them, they WILL move, and throw the sync off. Flat stock, like you are using, WILL twist and bend. Angle is a much STIFFER shape, and will NOT bend or twist as easily. I know this from experience on the Datsun.....

[jonuts]

I saw that, and that is the reason I mentioned a SINGLE brace. With the carbs how you have them, they WILL move, and throw the sync off. Flat stock, like you are using, WILL twist and bend. Angle is a much STIFFER shape, and will NOT bend or twist as easily. I know this from experience on the Datsun.....

i appreciate it. i agree the angle will be stronger. i'll address that soon here.

[jonuts]

well, after unplugging the 2 ports and pulling the upper hoses from between the carbs, she fires right up and idles with no fuel pouring out of the front of the carbs. still looks like too much fuel as i'm getting seepage on some of the hoses. i'll be picking up the low pressure fpr today and T-ing in a return fuel.

like below:

[jonuts]

alright, ran it with the above fuel routing and the motor did not like it one bit. it ran better unregulated with just the single fuel feed.

i'll just put it back to the way it was but keep the regulator in place and go from there.

i'm going to have to fab up that angle for all 4 DiverRay. 3 & 4 popped off when trying out the new fuel routing and had a back fire.

[cywelchjr]

alright, ran it with the above fuel routing and the motor did not like it one bit. it ran better unregulated with just the single fuel feed.

i'll just put it back to the way it was but keep the regulator in place and go from there.

i'm going to have to fab up that angle for all 4 DiverRay. 3 & 4 popped off when trying out the new fuel routing and had a back fire.

I'm thinking that the return line after the regulator is not allowing enough fuel to get to the carbs. There would have to be some restriction in that return line to allow some pressure to the carbs so they can get fuel. If it's an open line it's just a dump of fuel back to the tank.

[jonuts]

I'm thinking that the return line after the regulator is not allowing enough fuel to get to the carbs. There would have to be some restriction in that return line to allow some pressure to the carbs so they can get fuel. If it's an open line it's just a dump of fuel back to the tank.

yeah, i was surmising the same thing.

i'm just going to put it back to the way it was but with the regulator in place. it should be closer to kosher.

[DiverRay]

I'll try and use the keyboard to show you the way to run the fuel lines.

Pump ,,,,,,,, P.R.,,,,,,,,,,Carbs ,,,,return

0-----------0------------T--------|
blank space blank space bl|ank spac|e
blank space blank space blank blank | To tank

read between the blank spaces!!
If this stays together, you can see the return line is AFTER the "T" for the carbs. That is the ONLY way it will work properly.

[jonuts]

I'll try and use the keyboard to show you the way to run the fuel lines.

Pump ,,,,,,,, P.R.,,,,,,,,,,Carbs ,,,,return

0-----------0------------T--------|
blank space blank space bl|ank spac|e
blank space blank space blank blank | To tank

read between the blank spaces!!
If this stays together, you can see the return line is AFTER the "T" for the carbs. That is the ONLY way it will work properly.

by the looks of your routing suggestion, i'll need to introduce a T into the fuel line between a pair of the carbs for the return. hmmm.