8v twin carb airbox

How can I get one?
Where can I get one?
Should I get one? Etc etc.

So I've seen these Pipercross 600 ones but they don't make a baseplate for Golf anyone know which one fits or would I have to have one fabbed?

Does anyone else make them?

 

you can buy blanks from piperX

 

And then get someone to cut them properly?

Oh. yeah. If anyone has something they want to sell please pm me..

 

its only a thin sheet of ally, you could do it yourself if you careful with a drill, a jigsaw, and a file.

 

Hey um I just had a jarring thought...

If trumpets on a 8v twin carb setup normally need to be trimmed to clear the brake servo, doesn't that suggest an airbox (specifically the p600) will probably also not clear the brake servo?

 

Why do you want an airbox in the first place..?

 

Easier to feed cool air to the carbs? Somebody somewhere recommended it... This guy, to be specific.

 

Well have you got those trumpets? An air box alone isn't going to keep anything any cooler, quite the oposite infact...

 

even if I setup a ram air feed from the grille?

 

Why would you not just put a cold air feed straight to the carbs?

An airbox offers nothing in the cooling department...

 

An airbox can offer in the cooling department, an inclosed one with a opening can go straight to cooler air, but if you have problems with clearance around the trumpets it is likely you won't be able to fit one in...

 

I thought because the airbox was sealed it might make a difference in separating air from the cold air feed and heat from the exhaust manifold. Wouldn't it also be (a little?) more effective in directing the cold air straight into the carbs than just having a hose aimed at their general direction?

I also kind of wanted one to keep the noise down a bit. =/
(Don't hit me)

 

I'm sure the spread of cold air would be just peachy when moving, until you hit traffic where the enclosed space that is the airbox will start doing the oposite job and hold hot air...

Just out of interest, why have you bothered with twin carbs at all? You're going to gain very little (if anything at all, perhaps even lose) performance, lose fuel economy, and you don't want the noise either?

 

Fuel economy can't get any worse, struggling 200miles per tank on the motorway. And how can I gain very little when 1.3L Polo's are making 90+ bhp with 40s?

Just out of curiosity, would it make any difference if I sprayed the airbox white and then covered it with that thick foam insulation tape stuff with foil on the outside?

 

What's the spec of your engine, if you're only getting 20 (ish) MPG? Maybe you should fix the problems you have, rather than making the car more complicated, and creating more problems.

What do you plan to use the car for? Twin carbs on an 8v road car is a bad idea.

Incidentally the whole point of an airbox is that it means you're not sucking in hot air from the engine. The intake pipe determines where the air comes from, and therefore its temperature. The air routing to the airbox will be subject to some heating from the engine bay, but not nearly as much as if you were sucking air direct from the hot parts of the engine (which your carbs are just above).

Another point... Ram air doesn't really work below.... I can't remember what the number is, but I think it's over 100mph. Air doesn't get pushed into engines. The engine sucks in the air on the induction stroke. You might be able to help it a bit, but the effect is minimal.

If you're working at the back of the engine, looking for a cold air intake, then through the bonnet vents is the obvious choice. However, you need to be careful to avoid filling an engine full of water (when it rains), and causing hydraulic lock.

 

Facepalm

 

oh dear..

 

Still don't get how 1.3's apparently seem to gain so much from twin carbs.

Which is why I want one, but I'm getting the impression it's a bad idea or won't actually do much?

 

If you're determined to run twin carbs on an 8v, then you definitely need an airbox or some sort of cold air feed.

However, twin carbs on an 8v is only worth doing on a high spec competition engine.

So, as I already asked, what spec is the rest of the engine?