need help with bike carburetors

[retrojoe]

hey guys.
sorry for asking the question as I know this topic has been talked to death, but ive done a lot of googling and been thrown about all over the place.

basically ive gone and bought a set of CBR600F carbs to fit to my straight four 1.6 8v engine. it took me a while but I eventually settled on these as ive read a few people have had success with them before and I found an advised setup of:

1.6 8v - CBR600F-X carbs with the jets drilled out from standard 132 to 155,and 900 needles.

I'm fine with all of this and I'm going to have to make my own manifold as I cant find a kit for my engine but what angle should I be running these on? I was under the impression motorbike carbs could run at any angle but then ive stumbled across lots threads saying they need to be at the correct angle depending on weather there horizontal or vertical carbs, and thats where ive become lost and frustrated.

Thanks for all the help guys:)
Joe

[theheap]

This may sound really stupid but do you not recreate the angle they were sat on the bike?

[retrojoe]

yes i think so, but i don't really know anything about bikes so I'm not sure what the angle is. It would be a lot easier if i didnt have to get the angle the same, so how crucial is the angle? would they work as well if i just mounted them horizontally to the engine?

or does anyone know how much Bogg Brothers would charge to make me one, lol.

Thanks guys.

[shin2chin]

If you look at the float chamber where it joins the carb body you should aim to have that line as horizontal as possible.

[retrojoe]

Brilliant:) cheers mate.

[retrojoe]

I need to make a manifold for a vitara engine, but i forgott it needs extra channels for water cooling, a big pipe needs to go to the top of the rad and another one to the heater matrix. does anyone on here want to make it for me?

[shin2chin]

Can you post a pic of the manifold?

[MrSpeedy]

Where abouts are you?
I do TIG welding and have access to laser profiling.
I also have a machine shop at my disposal

[retrojoe]

ooo! sounds awsome:)

I'm down south in gosport if thats any good?

[retrojoe]

ok, i want to bash on with this project as ive put it aside for a little while due to a new job but its still constantly on my mind.

Next question!

This is the metal i had in mind to use for the flange plate, its about 2.3mm thick steel. should bee relatively easy to work with although after looking at many home made manifolds it appears that people use a lot thicker stuff! i assume this is so it doesn't warp under heat, but i cant find a written explanation anywhere.

What thickness metal is the best to use? is my stuff good enough as it is steel and not ally like some manifolds?

[sparkyt]

You'll need a lot thicker than that bud 7 to 10 mm ish as when you bolt it up you'll bend it leaving air gaps . Not good .. I can sort you out some if needed

[retrojoe]

thanks mate:) i think i might be able to source some but the problem will come when trying to shape the metal, as i think i might struggle with anything that big, cutting to size, drilling holes ect ect...

[MrSpeedy]

As Sparkyt said, you need at least 6mm and preferably 8mm for the flanges.

Aluminium is a lot more malleable than steel and will distort when you bolt it up if too thin

[retrojoe]

thats true, but i only have a mig welder so i could only use steel really. how easy is it to shape 8mm steel with a grinder and a hole saw?

[dormeister]

Its fairly labour intensive, but can be done with some patience, and a decent die grinder. Use your gasket as a guide, that makes life alot easier.
I have access to a laser cutter, if you send me your gasket, I could price up the cost of getting one done for you. Could turn it around in about 7-10days.

[jaykay]

cbr600 carbs prob be about 45 degrees on bike, if that makes any difference

[mt2man]

I'm in gosport too and i need to build a bike carb manifold for my 1.6 almera engine! haha

[retrojoe]

sweet mate. il race ya! lets see who gets it done first:)

[sparkyt]

Mark it out and post it to me ill plasma cut it for you . You can grind it and drill it .. pm me if you want

[retrojoe]

cheers mate, i might have found someone who can do it local but if that falls through i will deffinately contact you.
thanks again