Ram air on a midget : MG Midget Forum : The MG Experience

Ram air on a midget #1
James E Jimmy Campbell Bedford, VA, USA Sign in to contact 1967 Triumph TR4A 1971 MG Midget MkIII 1973 MG Midget MkIII	Topic Creator (OP) Oct 24, 2014 08:59 PM Joined 12 years ago 4,462 Posts

OK, we all know about needing lots of air for our engines, something like 18 to1 ratio, I think. I've been using the heater on cold mornings and I never use the fan just the air from the hose going to the front of the car and it really put thru a lot of air. Suppose you were to use the same kinda deal and put a hose forward on the other side and pipe it to the carbs in a neat looking fashion. Wouldn't that be a benefit, cooler and more air?

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Re: Ram air on a midget #2
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Oct 24, 2014 09:04 PM Top Contributor Joined 12 years ago 14,671 Posts

That would be a cold air box and yes it's beneficial, especially at higher speeds. Racer types have been doing it for years. thumbs up

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Re: Ram air on a midget #3
Mainline Ilya Ilya K Ray Brook, NY, USA Sign in to contact 1947 Willys Jeep CJ2A 1972 BMW 2002 1973 MG Midget MkIII 1974 Jeep SJ & more	Oct 24, 2014 09:07 PM Joined 9 years ago 634 Posts

If you have a long tube it will be a double edge sword. It will actually restrict air flow at idle and low speed driving because the longer the intake tube, the harder it is to get air through it.

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Re: Ram air on a midget #4
Speedracer Hap Waldrop Taylors, SC, USA Sign in to contact 1967 MG MGB Racecar "The Biscuit"	Oct 25, 2014 06:58 AM Top Contributor Joined 18 years ago 43,758 Posts

Here ya go.

Hap Waldrop
Acme Speed Shop
864-370-3000
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hapwaldrop@acmespeedshop.com

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MG/ Triumph Performance Street Engines - Cylinder Head Porting for street performance and race - DIY Engine Rebuild Kits With Free Tech Advice - VTO alloy wheels for British Sports Cars, and others

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Re: Ram air on a midget #5
AmishIndy Seth Jones Glendale Heights, IL, USA Sign in to contact 1971 MG Midget MkIII "Guenevire" 2007 Mazda 3 "Porco Rosso"	Oct 25, 2014 07:00 AM Joined 13 years ago 5,849 Posts

on a midget, the easy way to go is removing the left headlight bucket and turning it into an air intake.

Seth Jones

1971 MG Midget

www.SpridgetGuru.com

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Re: Ram air on a midget #6
jmac Jere McSparran Greenup, IL, USA Sign in to contact 1970 MG Midget "(SOLD)" 1978 MG Midget "Therapy" 1978 MG Midget "(SOLD)"	Oct 25, 2014 07:34 AM Top Contributor Joined 16 years ago 3,269 Posts

On a street engine with standard carburation it is not going to produce enough HP to make any noticeable difference. IMHO

Jere McSparran
JMAC Engine Shop
Website: http://www.jmacengineshop.com
email: jmacengineshop@gmail.com
Phone: 217-232-7303

JMAC Engine Shop jmacengineshop.weebly.com

MG/Triumph engine rebuilding. Specializing in the Midget/Spitfire 1500 engine.

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Re: Ram air on a midget #7
kirks-auto Robert Kirk (RIP) Davenport, IA, USA Sign in to contact	Oct 25, 2014 08:11 AM Top Contributor Joined 15 years ago 21,573 Posts

In reply to # 2833467 by jmac On a street engine with standard carburation it is not going to produce enough HP to make any noticeable difference. IMHO

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Robert Kirk

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Re: Ram air on a midget #8
fairmounter Mike N Philadelphia, PA, USA Sign in to contact 1972 MG M-Type Midget 1975 Dodge B-Series Van	Oct 25, 2014 09:02 AM Joined 15 years ago 2,174 Posts

This is the reality.

In reply to # 2833467 by jmac On a street engine with standard carburation it is not going to produce enough HP to make any noticeable difference. IMHO

But for fun, for a 1275, how about using a 1500 driver's side radiator flange, moving the overflow tank and ducting to the cold air box through the heater air hole.

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Re: Ram air on a midget #9
S1 Elan Kurt. Appley Akron, Ia., USA Sign in to contact 1964 Lotus Elan 1965 MG Midget MkII	Oct 25, 2014 09:10 AM Top Contributor Joined 11 years ago 8,014 Posts

In reply to # 2833467 by jmac On a street engine with standard carburation it is not going to produce enough HP to make any noticeable difference. IMHO

Don't know about that. My spridgets have always done better on the seat dyno on cool damp days. If it was easy it may be worth considering. I know I've thought about it but always wondered what would happen if one ducted in fresh air then was caught in a torrential down pour. Might end up with a little too much fresh coming in.

Kurt.

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Re: Ram air on a midget #10
58custom Tom Crocker Santa Clarita, SoCal, USA Sign in to contact 1969 MG Midget	Oct 25, 2014 01:35 PM Joined 16 years ago 1,400 Posts

In reply to # 2833467 by jmac On a street engine with standard carburation it is not going to produce enough HP to make any noticeable difference. IMHO

1969 MG Midget with Datsun A15/5 speed

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Re: Ram air on a midget #11
owensdad74 Brian Morse Ann Arbor, MI, USA Sign in to contact	Oct 25, 2014 02:08 PM Joined 12 years ago 2,470 Posts

Unless you incur a penalty for not having head lamps... Regulations do vary.

In reply to # 2833453 by AmishIndy on a midget, the easy way to go is removing the left headlight bucket and turning it into an air intake.

"And then I remembered what they said about old British Engines, if there ain't no oil under 'em, there ain't no oil in 'em." Tow Mater

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Re: Ram air on a midget #12
66jalopy Phillip Jolliffe Lake City, FL, USA Sign in to contact 1956 Morris Minor	Oct 25, 2014 06:47 PM Joined 11 years ago 6,727 Posts

Shhhh! Al Gore is monitoring!

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Re: Ram air on a midget #13
James E Jimmy Campbell Bedford, VA, USA Sign in to contact 1967 Triumph TR4A 1971 MG Midget MkIII 1973 MG Midget MkIII	Topic Creator (OP) Oct 25, 2014 07:17 PM Joined 12 years ago 4,462 Posts

After looking, I didn't see any good place to run the duct. I wasn't really looking to force air into it but provide some cooler air from outside the engine compartment. I'm not to sure on how to calculate the cfm the engine uses, but I'd think the carbs. would get a lot more air if it didn't have to draw air from those little snorkels on the breathers. Phillip, Gore is too busy hugging a tree to pay any attention to this.

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Re: Ram air on a midget #14
66jalopy Phillip Jolliffe Lake City, FL, USA Sign in to contact 1956 Morris Minor	Oct 25, 2014 07:19 PM Joined 11 years ago 6,727 Posts

Raise the back of the hood 2" and get cowl air.

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Re: Ram air on a midget #15
AmishIndy Seth Jones Glendale Heights, IL, USA Sign in to contact 1971 MG Midget MkIII "Guenevire" 2007 Mazda 3 "Porco Rosso"	Oct 26, 2014 12:43 AM Joined 13 years ago 5,849 Posts

In reply to # 2833930 by 66jalopy Raise the back of the hood 2" and get cowl air.

actually not a bad idea. The windsheild is so vertical that the spot right in front of the windsheild is actually a pretty high pressure area I would guess. On a B or C there is a nice chrome grille there for the heater intake. Maybe you could modify that to pretty up the intake you're designing? You'd have to remove the heater box, but you could fabricate something that goes over the battery somehow.

Seth Jones

1971 MG Midget

www.SpridgetGuru.com

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