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MG MGB Technical - Hi Tech Cooling Fan

I'm using a 12-inch Flexilite cooling fan in my MGA 1800, but it's a heavy beast despite its stainless steel blades that straighten out at high RPMs. Does anyone know of a new, hi-tech 12-in. light-weight fan that is available?
thanks,
Tyler
Tyler Irwin

Years ago, I had a friend with one of those metal flex fans.

One day, while buzzing around on the highway a blade
had fatigued and it suddenly shot through the hood.
I've written off metal flex fans ever since.

The problem here is finding a plastic fan as small as
12" in diameter.

I think that if you keep shopping and surfing, you'll run
into nylon plastic fans made by various manufacturers
- including Flex-a-lite and Derale, but, again, finding it
in 12" will be a problem.

Try domestic high performance shop such as Jeg's,
PAW (Performance Auto Warehouse), Summit, etc.

For over 20 years, I have had a fibreglass fan by Flex-a-lite
on my B/GT. They no longer make this particular item,
but sometimes you can find one at a flea market or on
eBay, etc. It began life as a 14" fan. I then made a jig
as a cutting guide and used a Dremel grinder to very evenly
and precisely take off 1/2 inch of length from each blade.
This left me with a 13" fan and I've had no problems with
balance. Although bigger than a stock metal fan, it fits
in a '71 B/GT, nonetheless. It has less rotating mass
than a metal fan; gulps in more air through the radiator;
and the blades flatten (slightly) at high speeds.

Derale now makes a nylon fan in 13" dia., by the way.

My next cooling system mod is to fabricate a simple,
open-style "hoop" fan shroud from a strip of aluminum
sheet. I saw a couple of Mini-Coopers (real, Mini-Coopers)
with this setup, and I thought I'd try this instead of buying
one of those "tray"-style shrouds from catalog.



Daniel Wong

If you are running an 1800 MGB engine with a MGB water pump in your MGA you can use the plastic 7 blade MGB fan. Means cutting the front shroud slightly and moving the MGA radiator forward by 1/4 -1/2" to get clearance, but it does work.
Run this system on my MGA with an MGB engine. Together with a radiator shroud I have no overheating problems in Houston in mid summer.
Rod Myers

KENLOWE make an electric fan for a B try MOSS or the MG OWNERS CLUB
peter bramble

This thread was discussed on 28/06/2002

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