[Tigers] Blower/Heater

[Tom Witt]

Slow is a relative term so it may be that it is running as fast as it can – or not.  If the bushings in the motor are gunked up that can slow the motor. First I’d lubricate them to see if it helps.  A number of people use the MG Midget/MGB fan motor. It is shorter than the stock motor, but if I recall correctly from the CAT shop notes it is stated to be faster. While my memory is from years ago I recall it seeming to turn faster than the original motor. I doubt because of the limited space the heater radiator can be improved.

Beyond that it is probably R&D for a motor/fan improvement.  Thankfully heater motors are very adaptable if you have a decent assortment of tools.  If it is any inspiration I use the stated the MG Midget motor/fan on the heater in my Turbo Pinto.  The original fan motor intrudes the engine bay and interferes with the wastegate down spout. In this case the shorter motor/fan provides the clearance. I have to run the motor backwards and the MG fan is smaller than the Pinto housing but it still gets the job done – for So. Cal..

A thought just occurred to me. If the fan motor was put on a dual pole, reversing switch on hot days the interior air could be blown across the heater core and exit externally.  This might be helpful for over heating issues – for the car and the driver.

From: Rollright--- via Tigers 
Sent: Tuesday, January 19, 2016 12:02 PM
To: tigers at autox.team.net 
Subject: Re: [Tigers] Blower/Heater

Hello,

Though my Tiger 1A is tucked away for the Massachusetts winter, thoughts of improvements/fix-ups still pass through my head. This question is about the anemic demister/heater system.

Two components make up this system
1) the blower with the squirrel cage fan
2) the heater radiator

The blower fan seems like it could use a redesign. SOOOO slow. Mine is working same as it ever was. Anybody tried upgrading this?
The radiator seems awfully small. Any smart-guy thoughts on this?

Anything else I should be thinking of? Any Ideas?

Even if the heater isn't regularly used, I'd like to be able to count on the system to defog the windshield. 

Jim Armstrong
382002083
Mk 1A
code 86
TAC # 0763


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