MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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MGBV8
Carl Floyd
Kingsport, TN
(4514 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

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Re: Aero / cooling front sheetmetal
Posted by: MGBV8
Date: October 20, 2012 09:49AM

Quote:
...air can pass over the slam panel and pressurize the engine compartment.

Why wouldn't the air passing through the radiator do the same thing?


Jim Stabe
Jim Stabe
San Diego, Ca
(829 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

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Re: Aero / cooling front sheetmetal
Posted by: Jim Stabe
Date: October 20, 2012 10:09AM

It does, but why would you want to add pressure with air that isn't doing any cooling to impede the air coming through the radiator that is actually doing some work. The radiator is a restriction to flow so air will take the path of least resistance if it is available - around the radiator. Air flows from high pressure to low so you want to keep the area behind the radiator at as low a pressure as possible. The closer the pressure behind comes to matching the pressure in front the slower air will flow until pressures equalize and the flow will stop. At rest the two pressures are equal and no air flows, hence the fan.


classic conversions
bill guzman

(294 posts)

Registered:
01/09/2008 01:58AM

Main British Car:
Re: Aero / cooling front sheetmetal
Posted by: classic conversions
Date: October 20, 2012 11:41AM

Will do Jim.

My RD has similar but not perfect. The opening for the radiator will be smaller about 50% and yes everything will be seal.
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Jim Stabe
Jim Stabe
San Diego, Ca
(829 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

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Re: Aero / cooling front sheetmetal
Posted by: Jim Stabe
Date: November 20, 2012 12:04PM

I finished up the top section baffleing.The top edge of the baffle will have a 1" bulb seal that will press against the underside of the hood. The bottom portion will be part of the front valence and will have an opening only as wide as the radiator core. If you look at the front of the core you will see a ding, a hammer fell and bounced against the core denting one of the tubes and the surrounding fins - stupid, stupid stupid...

Radiator baffle005.jpg

Radiator baffle006.jpg

Radiator baffle008.jpg

Radiator baffle009.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

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Re: Aero / cooling front sheetmetal
Posted by: BlownMGB-V8
Date: November 20, 2012 02:32PM

All that extra room and... HEY! where's all the extra room!??

It is really looking good. But radiators are hammer magnets. No matter what you do to protect them...
I feel your pain.

Jim


Jim Stabe
Jim Stabe
San Diego, Ca
(829 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

authors avatar
Re: Aero / cooling front sheetmetal
Posted by: Jim Stabe
Date: November 20, 2012 05:12PM

I remember when it was going to be naturally aspirated and how much room there was in the engine compartment. Where did it all go?

J1.JPG

Good thing I hadn't planned on an intercooler
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