Does a carb perform & function best when it stays level?

The reason I ask is this:
I'm building a rod with a Jagaur IRS.
Those axles must stay level to have correct gemoetry. Then the transmission (and the engine of course!) must stay level to avoid vibrations.

The top of my aluminium airgap intake is not level. I suppose that's because most originally mounted CSB motors are leaning a little towards the back of the car.
It is not enought material to change the top surface on the intake.
I haven't bought a carb yet.

What do you guys recommend?
-Don't worry and just leave the things as they are?
-Make an adapter?
-Use an off road carb or somthing?

How far off level are we talking here? I dont think youll run into issues unless this thing is way off. You could always build some sort of carb adapter to level it off.

The only mention I ever heard about "unlevel" and carbs was in the 4X4 forums, where the guys are standing K5's on their noses trying to rockcrawl - those guys switch to FI so there's no fuel sloshing in the bowls while they are at a 40 degree angle climbing a mountainside.

the only time the carb level comes into play on a norally driven car is either when it leans to far to the driver's side or to far the the passenger side.. as then you can not get the floats to adjust right. if the engine leans back or forward it will not matter. as the float adjustment would take care of that

the motor and trans SHOULD NOT BE LEVEL they should lean twards the rear
(trans lower than motor) it should lean apox. 2-4 deg. witch will put the carb aprox. level on the intake that is wy the intake is made at an angle. the engine ,trans and rearend should be aprox. oposit angles pinion down 1-4 deg. NOT in line with each outher. U-joints will not functoin properly if they are strate they nead an angle to make the neadle bearinngs in the cups rotate. if they have drasticley diforant anlges front and rear it will vibrate. most carbs will function up to 30 deg. or so without a problem.

You are absolutely right about that, but that's not the issue here.
We are not talking about the engine/trans inline with the rear axle. It is about those components being parallell, but at unequal distances from the ground.

An example: If i hold a metal rod level and 30" of the ground and you hold a metal rod level and 20" of the ground, then our metal rods are level and parallell, but they are not inline, right?

how did a simple question of whether or not a carb has to sit level get to here?

It is a simple yes and no question. Yes. It has to sit level in relation to the passenger & drivers side of the car. while it does not have to sit level in relation to the front and back of the car.

I can not clame to be an expert on the subject. And I am shure there are exeptionts in diforent aplications but generaly the engine and trans slope down the lowest point in the center of the car and the rear dif. slopes down the lowest point is also in the center of the car. they are not parellel. you should do some reserch the find the corect placement for your aplication.


As for wy I posted the information that I did. I got the imprshion you were doing a custom intall and thout If I could lend some info that mite save some hard work in avance I would try to lend a hand. I tride to explain wy the carb mount is not parellel the intake base.

One outher thing if you machine off the top of the intake to make it parellel to the engine the carb bolt holes will be at there original angle!

Thank you to all of you. It is valuable to hear other's opinions.

I think you meant if you machine off the top of the intake to be level (by using a level) the carb bolt / stud holes will NOT be at thier original angle and it would probably cause problems when trying to mount the carb for a seal.. more then likely end up with a few vac leaks

I'm aware of this problem.

A possible soultion might be to buy an aluminium carb spacer/adapter, grind it down to a proper angle and make new holes in it for the carburetor bolts.