[BruceWilkie]

I just had to check something! Well I just measured both a 4x and 6x head.... the single outlet hole is 1.185" ! There's some casting clutter just below the hole so maybe restricts down to 1.125" id equivalent. So area of that divided by two and converted to id would be... @.993sq/in divided by two = @ .496Sq/in which converts to @ .795" id.

So... #10 line then single restrictor at the thermostat to fine tune coolant return to the radiator. I'd try a good 160 thermostat #10 lines from the rear and front crossover entrance holes same id as your lines.

You might want to take note of the deck drilling differences that Pontiac used in 1960 when they went from reverse cooling to conventional cooling. http://www.pontiacsafari.com/EngineCooling/index.htm

Notice forward upper deck holes blocked....this was done to keep/minimize water taking a shortcut from the block (near the pump) and going right back out the crossover.

[GTOGEORGE]

I have nothing special with my cooling system..........just dry deck. I'm in the staging lanes just before a run at 135 and I'm coming down the return road at about 170 or so. Normally I'm shutting off my water pump & fan on the way back to get my Temp up to 185 just before I shut the engine off at my pit. I'm talking about a normal 80 degree plus day. I drive it to the staging lanes and back from my trip down the quarter. I do have a 1"or so restrictor in the thermostat housing.



George

[cgeise]

just an fyi the big needle and seat in an alcohol carb like low pressure at idle and low speed -- its hard for the float to control the n/seat down at low demand. then under full throttle its ok to go to 7 or 8 lb.

[Glenn Lever]

What is "dry deck"?

My fuel pressure regulator has a vacuum "senor" High vacuum = low fuel pressure (idle), low vacuum I have it set to 9 pounds of fuel pressure.

[Brian Baker]

Originally Posted by Glenn Lever

What is "dry deck"?

My fuel pressure regulator has a vacuum "senor" High vacuum = low fuel pressure (idle), low vacuum I have it set to 9 pounds of fuel pressure.

"Dry deck" = no coolant passing through the deck of the block, past the head gasket, to the heads. It aids in head gasket sealing on higher HP applications, especially when a power adder is used. Coolant is typically rerouted at the back of the block to the back of the heads via braided lines and fittings. Hard to accomplish with a factory block, but the IA-2 block comes delivered with a "dry deck" unless specified when ordering.

[Brian Baker]

IA-2 "dry deck" block...notice the absence of cooling holes.

[Glenn Lever]

Ok, thanks.

[Jack Gifford]

To add a little to Brian's description: for many, the main attraction of dry-decking is eliminating the possibility of coolant getting into cylinders- even if block-to-head sealing isn't perfect.

[Glenn Lever]

Originally Posted by Jack Gifford

To add a little to Brian's description: for many, the main attraction of dry-decking is eliminating the possibility of coolant getting into cylinders- even if block-to-head sealing isn't perfect.

Jack, good to hear from you again.

I have hard blocked the lower half of the blower engine.

[Jack Gifford]

Originally Posted by Glenn Lever

... I have hard blocked the lower half of the blower engine.

Even so, you might want to consider dry-decking it- which means also closing off all passages in the head surfaces.

[Brian Baker]

Originally Posted by Jack Gifford

Even so, you might want to consider dry-decking it- which means also closing off all passages in the head surfaces.

I think he said with the blower engine they weren't going to be concerned about being able to drive back to the pits after a pass, in which case they can tow it to the lanes and tow it back, and not have to worry about coolant at all, just run the engine dry.

[Glenn Lever]

I want to run coolant, but the crew is pushing for no coolant.

[Brian Baker]

Originally Posted by Glenn Lever

I want to run coolant, but the crew is pushing for no coolant.

If you're going to tow it to and from the racing surface, and you're running methanol, there really is no need for any coolant in the engine, and having coolant will only add to the "one more thing to potentially leak" scenario.

[Glenn Lever]

The point of running coolant would to be able to drive to the staging lanes and back to the pit after a run. Reduces the number of crew needed and the depenancy on crew.

[Brian Baker]

Originally Posted by Glenn Lever

The point of running coolant would to be able to drive to the staging lanes and back to the pit after a run. Reduces the number of crew needed and the depenancy on crew.

Well, you're going to have a 7 second (at least) blown alcohol dragster, which is a far cry from a bracket door car. You're still going to need at least one crewperson to help out, I don't see how anyone can do it alone, if for no other reason than safety. Things like helping you get strapped in, making sure your chute is ready to deploy before staging, etc. It's nice to think we can be a "one man band" in running a car, but when you get to a certain level of performance, it's best to have a crew to help.

[vin63]

X2...I agree with Brian. It really isn't practical or safe at that point to drive the car to the staging lanes and back to the pits. Even Tony "The Loner" Nancy had at least a couple of guys helping him out.

[Glenn Lever]

Originally Posted by Brian Baker

Well, you're going to have a 7 second (at least) blown alcohol dragster, which is a far cry from a bracket door car. You're still going to need at least one crewperson to help out, I don't see how anyone can do it alone, if for no other reason than safety. Things like helping you get strapped in, making sure your chute is ready to deploy before staging, etc. It's nice to think we can be a "one man band" in running a car, but when you get to a certain level of performance, it's best to have a crew to help.

We will be a three man band, my wife (who we are building a gasser for), and my son.

There is no way I would be able to strp myself in.

I just want to keep the numbers down as I do want to travel and putting crew up in a motel and feading them get expensive very quickly

[Brian Baker]

Originally Posted by Glenn Lever

We will be a three man band, my wife (who we are building a gasser for), and my son.

There is no way I would be able to strp myself in.

I just want to keep the numbers down as I do want to travel and putting crew up in a motel and feading them get expensive very quickly

Well, you can always do what Jungle (and many others did) on the match race circuit in the 70's. Find 2 or 3 souls in the pits willing to help out for the day. Most people you find walking the pits would love to volunteer just to be part of the action, and would be more than happy for some cheap grilled burgers for their time.

[Glenn Lever]

Originally Posted by Brian Baker

Well, you can always do what Jungle (and many others did) on the match race circuit in the 70's. Find 2 or 3 souls in the pits willing to help out for the day. Most people you find walking the pits would love to volunteer just to be part of the action, and would be more than happy for some cheap grilled burgers for their time.

I’m a believer in routine. Do everything the same way each time. No time to teach someone new the routine each time.

[taff2]

Quite easy to dry deck a stock block and heads, drill out and tap the cooling holes as needed to fit the selection of 1/8",1/4" and 3/8" NPT stainless Allen head plugs you've just bought,and screw them in using red Loctite or similar. If you tap the holes just deep enough so that the plugs sit slightly below the decks ,then you won't need to get the decks surfaced or cut.
I always like to have crew that I'm familiar with,friends or family,no strangers cruising the pits for me!