Vixen carb and engine level

[anonymous-user]

Something that has been puzzling:
With a standard Vixen (twin choke DGV carb) should the engine be broadly level or up at the front? The Kent was set tilting up at the front in the Escort hence the inlet manifold was formed the other way to make the float chamber level. If on the Vixen the engine is broadly level then the carb will be tilted forward. Unless the manifold face is machined flat and re studded like FF1600.
Most kit car applications are broadly level albeit a slight 'up' at the front to reduce air pockets.
So, on sight should the engine be 'flat' (very slight tilt) or at an angle to make the float chamber level (big tilt). If the former then are Vixen carbs on the piss?

[anonymous-user]

I think the escort manifold is about 3 degrees ish which doesnt sound a lot but quite noticeable on the air filter top. I would be very interested if any Vixen owners have level carbs with or without a visibly sloping engine. I think most Kent engines are installed 'flat' with a nominal tilt backwards only, but hopefully the PH Massive will have some feedback...

[anonymous-user]

I think up to about 3 degrees difference is OK?

[anonymous-user]

griff 200 said:

I have seen in a locust race car that needs to use the std inlet manifold carb set up to get a level float chamber the spacer plate made of phenolic was machined at an angle to get max power. Not in the rules but bending the rules. So this may be a mod worth doing but properly worth only a few hp. Richard

That's a good idea, the studs will still be on an angle but that's minimal. It's surprising how just a few degrees is very visible I think the float level difference between the two is about 4mm so important to get right