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MG MGB Technical - Cold Air Box

Recent thread discussed a custom fabricated air box. What is the experience of the group and has anyone used the one manufactured by TWM that was mentioned on the same thread on a "B". I assume this one requires a remote air filter box connected by a pipe to the air box (plenum). If Barry Kindig is out there and reading this were you ever able to get some pictures of your set-up that the rest of us could admire.
Frank

I used one for many years on a different BL car with an A-series engine and was convinced that it gave both better performance and economy. That and tuning using a vacuum gauge rather than factory specs. But I have tried the same vacuum gauge on my roadster and It doesn't don't end up that much different from the factory specs.
Paul Hunt

Did anyone ever consider using the airbox that's installed on the Wolseley (I forgot the type) that uses the B engine?
As it's the same engine and it uses the same carbs, it would fit, right? (OK, so the engine's installed transversly, a bit of altering could do the trick, right?)

Regards,

Alexander
Alexander M

I had a brief discussion with Roger Parker from MGOC about this some months ago - he reasoned that colder air into carbs could gain about 20% power over the warm air that normally circulates around the B engine bay.

I think he might have mind to try a few prototypes out but how much further he has got i am unsure.

Undoubtedly this would give you more power, many cars around the age of the B were using this type of filter box with pipe to aid in getting colder air to carbs, my brother has a mk1 vauxhall cavalier which has this set up (1978) - also the new B*W 3 series M3 "extra" model gains A LOT of HP from direct air straight from the front air dam into filters.

It would ruin the underbonnet look of the car i think, but i would get over it if i could guarantee a power hike. The principle is there but if anybody has produced anything i dont know - i missed the earlier threads on this page about it.

~PHIL
Phil

The earlier thread you are referring to interested me too. I compared the underhood measurements to those of the TWM box and it looks like it would be a reasonable fit into my '67, which has no brake booster. Booster would create interference problems, I believe. Cut a hole for and weld a 3" sleeve into the radiator support and connect it to the air box with flexible or rubber tubing, mount a conical K&N air filter with a 3" base to the front side of the sleeve, fabricate some kind of sheet metal splash guard for the air filter and you're good to go. Or at least you ought to be. Velocity stacks can be installed inside the box. Mind you now, I haven't done this, just schemed it out. If I recall, the TWM box sells for about $275.
Marvin Deupree

I would be very interested to see if anything like the 20% increase in power is true.

If so then this must be the cheapest power increase and I imagine that one still retains the lovely low rev torque feel of the MGB. If this is true, I wonder why it isn't more popular?

I've also read on the JagLovers board (I also have a Jag) about the same device and claims of significant power increases, and a previous article in the Jag club magazine made some claim of an XJS gaining around 15% increase from cold air duct to the air intake - Jag engine bays are very hot!!

I'm sure many MGB owners anxiously wait for some results from anybody doing this.


Peter
PVann

This thread was discussed between 19/09/2002 and 23/09/2002

MG MGB Technical index

This thread is from the archive. The Live MG MGB Technical BBS is active now.