[DeTomaso] radiator deal

[Asa Jay Laughton]

Anymore, I usually drill a few holes in the thermostat.  This allows  
some water to get past the thermostat when cold which could prolong  
warm-up, but it has the added benefits of helping air to pass when  
bleeding the system -and- increased flow when the thermostat is  
totally wide open.

I would not drill any holes in the bypass plate.  As it is, I've not  
found any thermostat yet with a "hat" that completely blocks the  
bypass when totally open.

Asa Jay

Quoting "B. Seib" <oldwheel at shaw.ca>:

> Actually Richard, the last thing you want to do is open up the by-pass
> holes.
> All the coolant that goes through the bypass circuit doesn't go through the
> radiator, which speeds warm up. After the engine is warm, any amount
> bypassing the rad through the heater or the bypass hole reduces the coolant
> system's ability. It can be a substantial effect if it's a large amount and
> is very undesirable. In fact if you pull the special 351C stat (with the hat
> to plug the bypass when it opens) as Jack suggested and don't block the
> bypass hole in the block, you are almost certain to have overheating
> problems. I think Jack has told us before that he runs an aftermarket water
> pump with the bypass blocked off, so it might work fine for him in his car.
>
> Barry
>
>
> ----------------------------------------------------------------------------
> ----
> richard at hitecheng.on.ca richard at hitecheng.on.ca
> Fri Feb 25 14:56:30 CST 2011
> Just curious, has anybody tried opening up the by-pass holes, this would
> slow down warm up a little but it would reduce the restriction. I have never
> had a cooling problem but I am at the start of building a stroker motor.
> Richard
> ----------------------------------------------------------------------------
> -----
>
> -----Original Message-----
> From: JDeRyke at aol.com
> Sent: Friday, February 25, 2011 3:13 PM
> To: kenn_green at yahoo.com ; detomaso at realbig.com
> Subject: Re: [DeTomaso] radiator deal
>
> In a message dated 2/24/11 2:40:49 PM, kenn_green at yahoo.com writes:
>
>> Basically that increased flow rate is necesary for high HP, and the flow
>> rate is limited by the Pantera cooling system design, and by multi-pass
>> radiators in particular.
>>
> I disagree with the last part. The main flow restriction in a Pantera is
> from the thermostat. You can verify this easily in your own Pantera by
> removing the thermostat entirely (no other changes) and driving your Pantera
> on a
> hot day. You will have trouble getting the water temp to 150 F! This is
> regardless of what radiator you have. One member from AZ was amazed to find
> that
> while running in his stock GT-5 (brass radiator, stock water pump and
> factory pusher fans but no thermostat) , he only showed 150-170F- in June in
> Las
> Vegas while thrashing it hard on track in 2nd & 3rd gear. Adding ONLY a 190F
> thermostat shot his operating temperatures up to 210-220 on an easy 500 mile
> road trip up to my place in northern NV. Try it and see. Cheers- J DeRyke
>
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-- 
Asa Jay Laughton - sent from somewhere other than home
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