Re: Running hot under load during hot (90F degrees+) days

["Carl Floyd" <cmfloyd@chartertn.net>]

Bill,

Just for curiousity, are your headers ceramic coated?

I'm also inclined to believe that you don't have enough radiator (& maybe
that shroud is blocking airflow). Next time turn on the heater and see if
the temp drops with the help of the heater core.

Also, make sure you don't have a radiator hose collapsing.

Some good reading on radiators & overheating (they have more tech. 
articles):

http://www.arrowheadradiator.com/14_rules_for_improving_engine_cooling_system_capability_in_high-performance_automobiles.htm

Be sure & read Improvement Rule #2.

I run stock V8 radiator without overheating, but my 215 is only putting 
162hp to the rear wheels.

Carl Floyd



> ----- Original Message ----- 
> From: "Bill Zenkus" <mgb_zenkus@yahoo.com>
> To: <mgb-v8@autox.team.net>
> Sent: Tuesday, July 18, 2006 8:31 AM
> Subject: Re: Running hot under load during hot (90F degrees+) days
>
>
> > Thanks to Bruce, Jim, Ed, David and Don for the great advice.
> >
> >
> > (I tried to organize the steps from everyone in this email so other 
> > listers would have a good single point reference if struggeling with a 
> > heat problem.)
> >
> > Jim, the details on my engine -   bored .040 over and stroked with a 300 
> > crank for a displacement of 265 c.u. or 4.3 liter. It has a CR of 10:1, 
> > is running a little rich, timing is set for 10 degrees advanced at idle. 
> > Runs great- constant pull from idle to 6500, no pinging or such. The only 
> > timing/jetting indication issue I have is under hard decelleration the 
> > engine pops a little out of the exhause (rich or dwell  - I think?)
> >
> > As many mentioned the need to vent from under the hood,  I do have 
> > louvers in the hood just over the back of the exhaust  (Yes, block 
> > huggers Jim,) plus 3 inch holes in the fenders directly below the louvers 
> > into the wheel wells.
> >
> > I will fabricate the duct for the lower radiator, but need to wait until 
> > I get a better front facia. (The air dam I have is NOT vented at all.) I 
> > will get either the LE front spoiler or the air dam with the cutout for 
> > the radiator. (Looking on EBAY now).
> >
> > Another good point is that I may need a top seal as well, I will check 
> > that clearance and install one if required.
> >
> > I will cut my coolant ratio down to around 25% and add a water wetter, 
> > The thermostat change to 180 from 160 confuses me but your experience and 
> > the actual results are good enough for me - so I will do this also 
> > (second to last step , next to last step being change out the radiator, 
> > after all these other changes as a last step, if required, I will add the 
> > oil cooler)
> >
> > I will implement all of these recommendations and believe I will resolve 
> > my heat issues soon.
> > Thanks again for all the great advice and I hope to see you soon at one 
> > of the upcoming meets.
> >
> > Bill Zenkus
> > Email: mgb_zenkus@yahoo.com
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