Block Fill??
Thread Starter
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Block Fill??
Looking at a race prepped block locally that is half filled.....
All I know is that it stiffens the block for racing, but would like more info please. Would a half fill be OK for the street? Oil/coolant overheat issues durring extend use? Can it ever be removed? Enlighten me guys....
Eddie
All I know is that it stiffens the block for racing, but would like more info please. Would a half fill be OK for the street? Oil/coolant overheat issues durring extend use? Can it ever be removed? Enlighten me guys....
Eddie
Pro
Joined: Oct 2002
Posts: 708
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From: somewhere south of normal
I did a half fill in the last block that was in my vette. Reason was I had two sleeves put in and the fill stiffened the lower portions of the cylinders. I had no issues with temps. It cannot be removed once it's in there.
Melting Slicks
Joined: May 2001
Posts: 2,131
Likes: 4
From: May help you? You can sure as hell try!
Is the block half full?....Or half empty?
I'm thinking of doing this for a 400 block I have too by filling up to the freeze plugs. I wouldn't have any reservations about doing this for a race motor but was wondering how many were using this on the street and how it was working out for them.
I'm thinking of doing this for a 400 block I have too by filling up to the freeze plugs. I wouldn't have any reservations about doing this for a race motor but was wondering how many were using this on the street and how it was working out for them.
Thread Starter
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
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Le Mans Master
Joined: Sep 2001
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From: Unreconstructed, South Carolina
I dunno eddie ... it MIGHT , MAYBE come out if block was baked & blasted ... just dunno.
Might be worth a call to your local machinist to see if they've had any experience w/ bake &blast on filled blocks.
Might be worth a call to your local machinist to see if they've had any experience w/ bake &blast on filled blocks.
Team Owner
Joined: Apr 1999
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
It is a very good idea when you you use 3.875 or 4 inch stroker cranks. I never had heat issues. You have to think about how only the upper part of the cylinder wall is subjected to the heat of the gas firing.
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
1st Gear
Joined: Mar 2007
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Filling a block strenghtens it, my reccomendations are to use HardBloc since to the best of my knowledge it's the only one compatable with antifreeze. a half, or short fill is to the bottom of the freeze plugs and personally i'd reccommend it on anything making over 500ft/lbs or above 7k rpms since it will keep the block from twisting and make the crank live longer. don't worry about overheating, for the most part heat is only made in the first inch of the bore, you'll have about 2.5 or more of anti freeze to keep it cool, if your really worried about it get a high flow water pump
Team Owner
Joined: Apr 2002
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From: All humans are vermin in the eyes of Guru VA
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Everything I have been able to find is that filling it up to the freeze plugs is just fine in a street car. I fully intend to do it when I send my block to be machined and prepped.
