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Cold Air Intake?

Posted by herculesmgb1971

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Cold Air Intake? #1
herculesmgb1971 gerard boulanger Hercules, CA, USA 1971 MG MGB MkII	Posted: March 22, 2012 05:56PM Registered: 1 year ago Posts: 696

I have a Weber 45 DCOE with a K&N air cleaner on it.

I am considering to bring fresher air into the carb from the front side of the radiator (next to the oil cooler and horn) instead of from inside the very hot compartment next to the exhaust and hot air moved from the fan.
I know it's a theory... And I am not racing...

A flexible hose could be installed through the existing 2-inch hole located on the radiator's mounting plate. I am thinking of the K&N RC-1090, since the room is limited, maybe one inch larger.
See the pics about the carb and the hole.

What do you think?

Any suggestions?

Thank you, Gerard

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Re: Cold Air Intake? #2
Be Coming Kelvin Dodd So. Calif., USA 1957 MG MGA 1957 MG MGA Coupe 1958 MG Magnette 1959 MG MGA 1962 Morgan 4 Seater → more	Posted: March 22, 2012 06:16PM Registered: 6 years ago Posts: 4,654

Gerard.

The factory made the hole through the radiator diaphragm bigger and installed a 3" diameter hose through to the grille area on some of their MGB race cars.

K.

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Re: Cold Air Intake? #3
kawtoy Shane Nudds Henrietta, NY, USA 1970 MG MGB GT	Posted: March 22, 2012 06:47PM Registered: 3 years ago Posts: 855

The effort and cost of making a cold air kit will far exceed the results. It has been discussed on here a few times before and I think the general though is not to bother. The money and effort can be better used in many places on the car. For instance the MPG gains (talking 1/4 mpg or so) can be equaled or likely beat by simply repacking the wheel bearings. It will reduce drag and also ensure everything will last till next service interval. Remember that a cold air intake doesn't help performance much except at high speeds where more cold air is being "forced" into the engine. Even then we are talking 1-2hp at most, hardly worth the cost of the hardware.

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Re: Cold Air Intake? #4
herculesmgb1971 gerard boulanger Hercules, CA, USA 1971 MG MGB MkII	Posted: March 22, 2012 07:34PM Registered: 1 year ago Posts: 696

OK,

Cost would be very low since I can make the whole thing myself including the sheet metal box to replace the one I have now with the flat K&N.

I guess you are right, it doe snot worth the effort probably...

Thank you.

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Re: Cold Air Intake? #5
mac townsend Fairfield, CA, USA	Posted: March 22, 2012 07:38PM Registered: 7 years ago Posts: 18,049

you may find this useful

http://www.mgrescue.com/documents/F0315AB5B6EC618BDF10C9E435BAF4F13BE97B09.html

1973 Roadster. A nice 50-footer!
SUs, Datsun 5-speed
MGB Tips and Tricks: www.mgrescue.com

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Re: Cold Air Intake? #6
kawtoy Shane Nudds Henrietta, NY, USA 1970 MG MGB GT	Posted: March 22, 2012 09:00PM Registered: 3 years ago Posts: 855

That link made my head hurt. ME NO LIKE MATH, NUMBERS MAKE SHANE EYES TWITCH. ME LIKE CARS AND BOOBS.

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Re: Cold Air Intake? #7
favedave David Church Saint Joseph, MO, USA 1967 MG MGB GT "Marilyn" 1995 Ford Probe 1995 Ford Probe "The Probe"	Posted: March 22, 2012 09:10PM Registered: 2 years ago Posts: 1,822

Follow Kelvin's advice. The trick part is keeping the air cool in traffic, not at cruising speeds. So you will have to build some kind of cool air box with insulation connected to the carb throats.

Go for it!

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Re: Cold Air Intake? #8
NNN Norman Nalepa Florida, USA 1979 MG MGB "Chick Mobile"	Posted: March 23, 2012 09:43AM Registered: 3 years ago Posts: 1,333

Just make sure you put a screen in front of the intake. You dont want all kinds of bugs clogging the filter.

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Re: Cold Air Intake? #9
herculesmgb1971 gerard boulanger Hercules, CA, USA 1971 MG MGB MkII	Posted: March 23, 2012 09:39PM Registered: 1 year ago Posts: 696

Good advice Norman, I guess I will put a thin 6x6 stainless steel mesh behind the grille

Thank you.

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