slow heating

[COPO 70 RS/Z28]

Intake

[Plowman]

I am running with out a fan shroud too. I have a five blade on and its good. Try that,a clutch fan with five blades. Paul

[SS427]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: COPO 70 RS/Z28</div><div class="ubbcode-body"> The assembly manual does not indicate a shroud, the radiator frame is not set up for a shroud.</div></div>

I was going to argue this as I have owned several 1967 396 and SS427 Impalas over the years and could have sworn they all had shrouds. After looking at some photos of the cars from the late 70's and early 80's with ones I could see, you are right, they did not.

However, my assembly manual shows #3903958 when used with RPO L35, with M35 or M40, L35 and N10 with L35 or M40, L36 and M40 with L72. Confusing.

[COPO 70 RS/Z28]

Its weird, In the copy I have they show a shroud (i have to look later) I think on the air injection reactor equipment radiator mounting page &quot; A16 K19&quot; but, Sheet A4 shows the radiator assmb but doesn't reference a shroud and A4 looks almost exact to what I have. Also Sheet A3 of the assembly manual &quot;396 &amp; 427 - generator mounting , fan, belt &amp; pulleys&quot; designates L35 &amp; L36. It shows the 4 blade fan but strangely it doesn't give a part number for the fan it lists the fan as &quot; PRODUCTION PART&quot;

There is a reference to UPC 13 Radiator assmb and radiator shroud assmb but the UPC13 sheets are not in the copy I have, copy is the KEY term here.

Strange??????

I wonder if it has something to do with the fact that the car is a very low option car. Power steering only?

[COPO 70 RS/Z28]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 69SSZL1</div><div class="ubbcode-body">Also you can try &quot;Water Wetter&quot; that stuffs really helps.
http://www.summitracing.com/parts/RED-80204/
</div></div>

That water wetter is interesting I read the tech info on it, I never realized that glycol coolant / antifreeze actually was less conductive than regular water.

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">removal of heat from an aluminum bar at 304°F by
quenching the bar in different coolants at 214°F under
15 psi pressure. Compare the time required to reduce
the temperature of the aluminum to 250°F, or the boiling
point of water at 15 psi. Red Line with
WaterWetter® required 3.2 seconds, water alone 3.7
sec, 50/50 glycol in water required 10.2 sec, and
100% glycol required 21 sec. Water alone required
15% longer, 50/50 glycol 220% longer, and 100% glycol
required 550% longer.</div></div>

Cool Stuff! [img]<<GRAEMLIN_URL>>/grin.gif[/img]

[kwhizz]