thanks, I put in a recorded 4 row rad last summer, made no difference.
Lionel
>From: "Robert M. Lang" <lang@isis.mit.edu>
>To: lionel klotz <trsixman@hotmail.com>
>Subject: Re: fan blades
>Date: Wed, 2 Apr 2003 16:51:10 -0500 (EST)
>
>On Wed, 2 Apr 2003, lionel klotz wrote:
>
> > I have a 70tr6 motor, it suffers from a bit of overheating (runs at the
>3/4
> > mark in traffic and halfway between 1/2 and 3/4 while driving. i have
>both
> > the 7 blade and the 13 blade fan. I would like to know which one runs
> > cooler. I presently run with the yellow 7 blade fan.
>
>The 13 blade fan will move more air.
>
>However, you need to figure out if you have a problem in the first place.
>What you should do is go to a radiator shop (or you can do this yourself),
>but monitor the exact temperature of the coolant while the motor is
>running. Radiator shops have a special cap that they install that has a
>mechanical thermometer that is very much like a meat thermometer that'll
>tell you exactly what your temps are.
>
>Normally, your car should run in the 180 - 190 range. If you get number
>higher than that, you may need to take a close look at the efficiency of
>the radiator. For example, the core could have scaling or crud that is
>blocking some of the radiator's efficiency. Along those lines, I have seen
>TR6's gain radiator efficiency just by back-flushing the bugs and crud
>from the radiator "fins"!
>
>So, while more airflow might help your situation, it might also just mask
>some underlying cause. It's worth it to get to the bottom of your
>situation if only to get you "peace of mind".
>
>FWIW, my TR6 (74) has always read right at the halfway mark when warm and
>will climb just a bit above halfway when the engine gets worked hard (like
>going up a hill in 90 degree summer days). I confirmed that my radiator
>inlet temps were areout 195 when I bump over the mid-temp. mark. I also
>went one step further and confirmed the radiator outlet temps to be just
>about 10 degrees (f) cooler than the radiator inlet temps. In my case, I
>have a newly cored three-row radiator, but I also have the motor worked
>over a bit for better performance (9.5:1, headers, cam, all that stuff).
>
> > thanks
> > Lionel
>
>regards,
>rml
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