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

[Barrie Robinson <barrie@look.ca>]

Bill,

Further to my previous email......

I have not seen any reliable data on the use of 'water-wetter'.  All 
it does is break down surface tension of the water and this removes a 
minuscule 'blanket' of molecules.  The difference I suspect is not measurable.

Have you ceramic coated your exhaust manifold ?

At 08:31 AM 7/18/2006, Bill Zenkus wrote:
> 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
Regards
Barrie

Barrie Robinson
(705) 721-9060 
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