hard block

S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
I was wondering how Meany people are using hard block and if its worth doing..also is.it harder to keep cool running around on the street?

I filles to bottom of freeze plugs. Short fill. Truck runs cool until you get into it then temps rise and cool back down in a few seconds. That's the reason not to tow very heavy with a partially filled block.

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Stingpuller

The Pusher Man
Jan 11, 2007
2,019
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48
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central Ohio
Hardblock

I wouldn't fill a motor if its getting driven very much. If it's a toy with limited street time it should be fine. The motor will not run hotter but the oil temps will, A bunch! I run hardblock and think it's a must on a performance motor but will not run it in a driver. Be sure to put a oil temp gauge.
 

MACKIN

Smell My Finger...
Aug 14, 2006
3,948
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Connecticut
For the life of me I cannot see how you can fill a block part way and daily drive and not have any adverse effects? Im referencing street driving traffic etc etc.
 

S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
mine is half filled and i drive it everywhere, no negative change. I do monitor oil temps fwiw.

How much change in oil temps did you see? Hard block is a cement based grout so heat transfers should be minimal under normal driving conditions.

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S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
do you run an oil temp guage? noticed any adverse effects with coolant temps?

Like I stated before. The only adverse effect that I have seen is that the water temp will rise quickly under hard acceleration and will be back to normal spot within a few seconds. I am talking about a motor capable of over 1k HP. That particular tune probably makes in the neighborhood of 750+

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