Weber manifold for Xflow?

[MarkJ]

OK, I've done the Search thing, and although interesting, my question is not yet answered.

I have just agreed to buy twin Weber 40 DCOEs to fit to my 1600 Xflow in a narrow-body SE, and am interested in a manifold to go with it (if anyone knows of one). I am considering one at present which is the 75mm type rather than the 90mm type. However, the guy selling it thinks it will still be too long to fit without cutting holes in the bonnet.

Is this the case? If so, what should I be looking for?

Thanks,

MJ.

[Graham.J]

Errr what's the problem with cutting holes in the bonnet? I don't really understand, is your bonnet hole-less at the moment? If so I'd cut a hole in the side so the carbs can draw in more air.

I also have a 1600XF in my SE and just changed the manifold as the other one's threads were dead. I bought the standard one from Demon tweeks, don't think I had an option about the size of it but I will check to see what they have on offer.

[Mark Stanton]

You will need the shallowest manifold available - Got mine for my engine from Westfield - X-Flow units - perhaps try Burton Power  

With an Se and with the shallowest K&N's or similar you will probably need to cut a hole/slot at least for the front filter.

Without filters and shallow ram pipes you might just get away without a hole - but do you really want to run with air filters      

[furtive]

The manifold I've got has got "Catering Cars" stamped on it. I hope it fits!

[Graham.J]

The setup I have on mine is as follows (ignore te clamshells, they've gone):

and the hole is for one filter really but kind of one and a half (ignore the fool in the driving seat, it's not me):

[Blatman]

I guess we're all assuming this is for a narrow bodied car......

If so I'd cut a hole in the side so the carbs can draw in more air.

Not necessarilly true. A fast moving stream of air past an open ended trumpet can, at certain speeds, actually remove some of the air............

[Mark Stanton]

I guess we're all assuming this is for a narrow bodied car......

You're still feeling poorly then Young Blatters    

to fit to my 1600 Xflow in a narrow-body SE

 

[Blatman]

Heeeeeeeellllllllpppppp

I've gone blind.............    

What a tit................

Any how, there's some useful discussion on cold air feed to the carbs/trumpets here. Try tio ignore the K series specific stuff, and weedle out the aerodynamic stuff. Bear in mind that IIRC, Peter Carmichaels car (253bhp K series.........) does NOT have a hole in the bonnet, nor does it have a cold air feed, although he's obviously got one in the making.

Of particular interest in this area though, is the posting, on page 2, from Julian Thompson, who quotes directly from the k&N website, and is where my "not necessarilly" comment above, comes from.

[Graham.J]

Not necessarilly true. A fast moving stream of air past an open ended trumpet can, at certain speeds, actually remove some of the air............

This is also true, I was just thinking where the air would come from to go into the carbs, I always thought it was better to have cool air going in than warm air (warmed by engine) but then again, I may be wrong, I have alot to learn in my future years of motoring.  

[Blatman]

Cross posting, so you won't have read some of my edited comments, nor the stuff on Blatchat......yet..........

[samcooke]

You can get shallower filters than the ones Graham has got which will fit under an SE bonnet - I've got em, see -

Or rather, don't see.

They will rob you of a bit of airflow but prolly not enough to notice a difference in power.

[Graham.J]

Any how, there's some useful discussion on cold air feed to the carbs/trumpets here. Try tio ignore the K series specific stuff, and weedle out the aerodynamic stuff. Bear in mind that IIRC, Peter Carmichaels car (253bhp K series.........) does NOT have a hole in the bonnet, nor does it have a cold air feed, although he's obviously got one in the making.

Of particular interest in this area though, is the posting, on page 2, from Julian Thompson, who quotes directly from the k&N website, and is where my "not necessarilly" comment above, comes from.

Cheers blatters, that info on blatchat was interesting reading.

The thought of a vacuum did pop into my head when you meantioned "fast moving stream of air" as it's similar/the same as the process of a squirty water gun thingy (that's the technical term for it ) when air rushes over the hole it creates a vacuum sucking up the water.

Didn't that thread on blatchat mention that filters combat this problem and a vacuum isn't created, or have I missed something?

Sam, how shallow are your filters as mine aren't that thick? (I don't think)

As I bought my car second hand I didn't really have a say in whether I had a hole or not, I'd have probably posted on here asking you lot what was best.

[Blatman]

The gist was that a filter (sausage type, not socks, which seem to be universally despised....) smooth out the airflow once inside the confines of the fliter/airbox, but I doubt they'd help with the air rushing past at high speed, 'cos the carbs have to suck it in from somewhere.........

[stu999]

........and if the filters concerned are as good as they are supposed to be at not restricting airflow, then air will be rushing past 'em at high speed anyway.

[Thor, God of Thunder]

.....I run my SE with twin 45's and no hole cut in the bonnet. What happens when you blow air across the top of a milk bottle? Also exposed filters to all manner of road crud, rain and pratts with cigarettes. Leave your bonnet as nature intended.

.....Graham, love the shagtastic clamshells, baby.