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#61
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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. |
#62
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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 |
#63
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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.
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#64
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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.
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#65
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"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.
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Just a blind squirrel looking for a nut. |
#66
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IA-2 "dry deck" block...notice the absence of cooling holes.
__________________
Just a blind squirrel looking for a nut. |
#67
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Ok, thanks.
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#68
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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.
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
#69
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Quote:
I have hard blocked the lower half of the blower engine.
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#70
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Even so, you might want to consider dry-decking it- which means also closing off all passages in the head surfaces.
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons? ... or has built a record breaking DOHC hemi four cylinder Pontiac? ... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967) |
#71
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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.
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Just a blind squirrel looking for a nut. |
#72
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I want to run coolant, but the crew is pushing for no coolant.
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#73
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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.
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Just a blind squirrel looking for a nut. |
#74
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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.
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#75
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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.
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Just a blind squirrel looking for a nut. |
#76
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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.
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1963 Tempest Convertible Pontiac-Powered Funny Car: 400 block, Littlefield 8-71 blower, Enderle injection, custom blower intake, three-disc glide clutch, three-speed Lenco |
#77
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Quote:
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
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Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#78
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Quote:
__________________
Just a blind squirrel looking for a nut. |
#79
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Quote:
__________________
Glenn R. Lever Rochester, New York 14617-2012 Web Site http://www.leverfamilysite.com/ Front Engine Dragsters http://www.frontenginedragsters.org/forum/ |
#80
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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! |
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