Thinking about doing a partial block fill and wanted to know if anyone has done it with a street driven FI lt1. I've already done tons of searching and couldn't find anything with people who have done it with FI.

 

My 383 i just had built has the stuff from summit, but i only did 2". I wouldn't go all the way to the water pump holes for a street driven car.

 

Hell Brady I DO!! If the water still ciruclates your fine!

 

So anyone have much experience with a partial filled block w/ FI running on the street? Any heat problems?

 

hate to hijack the thread, but what are the advantages to filling the block?

 

Basicly, It goes into the coolant passages and stiffens the block, If your cylinder walls are thin it helps keep them in round, It prevents block flex, it reduces blowby from the rings because the cylinders are more rigid. And some people use it to turn an open deck block into a closed deck (fill the block, put something over the top then flip it over to keep it from running out and let it harden)

 

The more the info the better, not much out there on block filling that i could find.

 

Even on NA setups it's a good idea. I haven't had or seen a problem with a half fill on the street up to the bottom of the water pump.

Bret

 

You talking LT1 blocks or any GM block? and at what power level is it a good idea? I have a Gen 1 block I'm planning on building into a 383 for my Mercedes, looking for ~400 hp n/a with about a 150 shot of nitrous.

 

Any OEM block you try to put too much power in.

Bret

 

1/2 fill in all of mine.

Rich

 

good to know, now all I have to do is figure out what to do about this IRS being designed for half the power what I want to give it.

 

1/4 fill on my LT-1 383, no overheating problems last summer in 90-100 weather on the stock radiator

 

Mine filled to bottom of frost plugs, what I have noticed is increase in oil temp.

John

 

Oil temps on street and drag cars are more often too low than too high. Ideal is 200-220F. Don't worry unless it goes >250F

Rich