Not sure about the exact pulley for your application, but ,a smaller wheel turns fasterWhat size pulley should a 71 Duster 340 non air car have? Also, would a larger or smaller make the water pump spin faster?
Best of luck. Regards, JeffThank you. Will measure mine tomorrow. Really trying to not leave any stone unturned. Gonna make sure this car runs cooler this year.
A larger crank pulley will spin the wp and alt faster.What size pulley should a 71 Duster 340 non air car have? Also, would a larger or smaller make the water pump spin faster?
Thanks for clarification into the theory of that. Yessir, a larger drive will move a belt faster. I'm in the Tampa area, and don't have overheating issues on my 340, w 4:10s. It was in a much heavier car ( 66 sat) in a Duster now. I could measure, if it will help anyone. All the pulleys are of the original 66 273 a/c mill that was in my old SatiliteA larger crank pulley will spin the wp and alt faster.
A smaller water pump pulley will spin the wp faster.
No shroud! Wow Man! I drove mine daily in traffic for a few years, even in the Summer here. Always run a shroud here! Lol. That said, I'd Never daily drive my Duster now, unless it's 10 miles each way or less. SO MANY people have moved here in the last year or so, it's gotten crazy. And the majority cain't drive no how... I'll grab a tape and report back. Just so it's on file. I know that isn't the OP's need, but maybe it'll help someone else.... I have Learned So Much just "Thread Diggin"... lolMy stock 67 dart 273 non ac has about
6 for the crank and 6.25 for the wp, slightly underdriven. No shroud, 7 blade fixed fan, cools fine .
So Cal carNo shroud! Wow Man! I drove mine daily in traffic for a few years, even in the Summer here. Always run a shroud here
Man, That's cool as can be! Awesome! Ok, went out to the car. Hard to get an Exact # with everything in the way, and not using a square or 2 levels for reference, plus it's dark here. About 7. 125 or a .25@ crank and 6 to 6 and an 1/8 th or 1/4" for WP...was running a flex fan, switched to a clutch set up, supplied by some Good Mopar Brothers here. Haven't put the clutch set up in traffic in summer yet...So Cal car
The dart was my dad's daily driver, he put 300,000 miles on it in 25 years
Just FYI, I was born in ST. Petersburg in 1958. I was raised there until a nasty family thing, and moved to Seminole county in 1968. I left Florida when I joined the Marine Corps in 1977. After our marriage in 1987, we moved to Washington State. My wife and I just both retired in the past month. We're heading back to central Florida this summer or fall. Looking forward to taking my Swinger down the strip at Bithlo, now Speed World. We'll meet soon.Man, That's cool as can be! Awesome! Ok, went out to the car. Hard to get an Exact # with everything in the way, and not using a square or 2 levels for reference, plus it's dark here. About 7. 125 or a .25@ crank and 6 to 6 and an 1/8 th or 1/4"...was running a flex fan, switched to a clutch set up, supplied by some Good Mopar Brothers here. Haven't put the clutch set up in traffic in summer yet
Sounds Great! Looking forward to meeting Y'all as well, and Thank You for Your Service to this Great Country! I worked with quite a few Marines when i was doing Volunteer work. I was born at Ft Darnell Army Hospital, Texas, '71. Seminole County is Nice! There are still cool parts of Pinellas, but price and traffic is Insane! I'm actually kinda towards Plant City. Tampa has gotten silly. Speed World is about the only place around these parts anymore... Lakeland had test and tune, but been closed for many years..Just FYI, I was born in ST. Petersburg in 1958. I was raised there until a nasty family thing, and moved to Seminole county in 1968. I left Florida when I joined the Marine Corps in 1977. After our marriage in 1987, we moved to Washington State. My wife and I just both retired in the past month. We're heading back to central Florida this summer or fall. Looking forward to taking my Swinger down the strip at Bithlo, now Speed World. We'll meet soon.
Nascar at least at one time used restrictors in place of thermostats. But that would follow the continuous high speed engine part of the article.
You nailed this.[1] Yes, the article in post #15 is wrong. It ignores a fundamental point: if the coolant stays in the rad longer [ to supposedly get rid of the heat ], then the coolant in the engine will gets hotter because it is a closed circuit. Now, hotter coolant enters the rad for cooling than would otherwise be the case.
[2] Many people who hardblock their blocks report cooler running. Since most of the coolant volume is in the block, a large proportion of coolant [ for cooling ] has been removed from circulation [ pardon the pun ]. So how can that be, less coolant, runs cooler? The remaining coolant circulates more quickly because there is less of it & cooling is improved.
[3] Using a 1" spacer & it runs cooler. The 1" is about the open area of an open thermostat. If you add up the area of the coolant holes in the head gasket, that area is greater than the stat area. So the stat regulates flow, not the gasket holes, but more importantly the restriction of the hole/stat creates a pressure build up in the coolant. Hot spots can form in the heads, & cause localised boiling [ nucleate boiling ]. Boiling water contains air bubbles, a poor conductor of heat. By building pressure in the system, the bubbles are suppressed & cooling is improved. They were pretty smart those factory engineers!
[4] Go to tech tips on this website. Started by Howard Stewart, who made the Stewart racing water pumps & built his own WP dyno.
www.stewartcomponents.com
Wonder why the outlets on the electric pumps are 1"? and also all the newer cars went to a smaller upper thermostat outlet.[1] Yes, the article in post #15 is wrong. It ignores a fundamental point: if the coolant stays in the rad longer [ to supposedly get rid of the heat ], then the coolant in the engine will gets hotter because it is a closed circuit. Now, hotter coolant enters the rad for cooling than would otherwise be the case.
[2] Many people who hardblock their blocks report cooler running. Since most of the coolant volume is in the block, a large proportion of coolant [ for cooling ] has been removed from circulation [ pardon the pun ]. So how can that be, less coolant, runs cooler? The remaining coolant circulates more quickly because there is less of it & cooling is improved.
[3] Using a 1" spacer & it runs cooler. The 1" is about the open area of an open thermostat. If you add up the area of the coolant holes in the head gasket, that area is greater than the stat area. So the stat regulates flow, not the gasket holes, but more importantly the restriction of the hole/stat creates a pressure build up in the coolant. Hot spots can form in the heads, & cause localised boiling [ nucleate boiling ]. Boiling water contains air bubbles, a poor conductor of heat. By building pressure in the system, the bubbles are suppressed & cooling is improved. They were pretty smart those factory engineers!
[4] Go to tech tips on this website. Started by Howard Stewart, who made the Stewart racing water pumps & built his own WP dyno.
www.stewartcomponents.com
WOW! What rpm were you turning while cruising 75 mph with 4.56 gears and a 28” tire? 5000? I have 3.91 with 28” tires and turn 3000 at 60mph. That thing must have been singing!. Cruising at 75 -80 MPH with a 5500 converter and 456 gears 28 inch tires
I put 4:56s in my 68 Coronet 383 4 spd car., back in the early 90s. Put it on 275 ONCE.. open headers, lasted about a week..... car Was sick w/ them! But She Ran like a Scalded dog, w/ 3:55. Miss my Baby Still!WOW! What rpm were you turning while cruising 75 mph with 4.56 gears and a 28” tire? 5000? I have 3.91 with 28” tires and turn 3000 at 60mph. That thing must have been singing!
it was around 4000 rpm @ 75 . What I can tell you at 8500 in drive The speedo was well over 150WOW! What rpm were you turning while cruising 75 mph with 4.56 gears and a 28” tire? 5000? I have 3.91 with 28” tires and turn 3000 at 60mph. That thing must have been singing!