So that was an original 340 forged crank that you spun a bearing on? And out of curiousty, exactly what RPM did you spin that too? Sounds awesome though!!!
....the 340 is a great engine, it revs up quick because of the short stroke. In the Australian built Charger it had a 780 cfm 4bbl with the big valve heads, 12:98 1/4 mile time factory [300 mm rear street tires] saw it with my own eyes. Had to tape another graph sheet on top of the one on the dyno readout it literally went off the scale !
We spun a rod bearing, but for the most part the engine itself survived. The block was unarmed and the cranshaft is turnable. This engine is now sitting on a stand and a 410-cube 340 stroker is on its way in... The new rig is basically a single-carb setup of the 410ci Six-Pack motor featured in October 2008's Car Craft Magazine.
@DaCarGuy69 spinning a rod bearing is a sign that your crank may be developing an oval shaped wobble between main caps at high revs. It could be just a case of unbalanced gear, otherwise the only way around it is to run a forged steel crank.
@inboundlight0711 they were steel through '71...they made some changes to the 340 in 1972 and dropped the compression to lower the horsepower. in 72 & 73 they were cast crank & externally balanced, but a lighter balance than a 360. they also changed the design of the pistons as well. just some info for anyone building a 340...make sure you get the correct parts, they dont all interchange
@DaCarGuy69 - The setup that you are using to replace the stock engine is precisely what I am considering when i begin my work. You can get big block torque from an engine without any tight spaces. Of course, I am going to blow the hell out of mine, too and that is going to be one evil demon, all puns intended. That is a gorgeous Plum Crazy paint job. Wonderful car! Congrats!
spun bearings suck ass.... breaks my heart when a 340 gets an injury :(
sonofthesheriff 1 year ago
So that was an original 340 forged crank that you spun a bearing on? And out of curiousty, exactly what RPM did you spin that too? Sounds awesome though!!!
ZDanimal 1 year ago
....the 340 is a great engine, it revs up quick because of the short stroke. In the Australian built Charger it had a 780 cfm 4bbl with the big valve heads, 12:98 1/4 mile time factory [300 mm rear street tires] saw it with my own eyes. Had to tape another graph sheet on top of the one on the dyno readout it literally went off the scale !
BTsmoke 2 years ago
full dodge demon
1032410790 2 years ago
i got a hot wheels demon EXACTLY like that
Spitfire995 3 years ago
that high-rev V8 sound freaked me out!That the sound of power!!Did that v8 survived well after those pull's?
whitesnake57 3 years ago
We spun a rod bearing, but for the most part the engine itself survived. The block was unarmed and the cranshaft is turnable. This engine is now sitting on a stand and a 410-cube 340 stroker is on its way in... The new rig is basically a single-carb setup of the 410ci Six-Pack motor featured in October 2008's Car Craft Magazine.
DaCarGuy69 3 years ago
@DaCarGuy69 spinning a rod bearing is a sign that your crank may be developing an oval shaped wobble between main caps at high revs. It could be just a case of unbalanced gear, otherwise the only way around it is to run a forged steel crank.
BTsmoke 2 years ago
@BTsmoke 340 engines came with forged steel crankshafts from the factory, at least they did in 1970, I'm unsure about 1972, but I think they did too.
inboundlight0711 6 months ago
@inboundlight0711 they were steel through '71...they made some changes to the 340 in 1972 and dropped the compression to lower the horsepower. in 72 & 73 they were cast crank & externally balanced, but a lighter balance than a 360. they also changed the design of the pistons as well. just some info for anyone building a 340...make sure you get the correct parts, they dont all interchange
gottaluvthat240B 1 month ago
@DaCarGuy69 - The setup that you are using to replace the stock engine is precisely what I am considering when i begin my work. You can get big block torque from an engine without any tight spaces. Of course, I am going to blow the hell out of mine, too and that is going to be one evil demon, all puns intended. That is a gorgeous Plum Crazy paint job. Wonderful car! Congrats!
AlienZygote010 1 year ago
was this in arizona if so where?
jagpimp4023 3 years ago
Yep, I live in Tempe. The dyno runs were made at Arizona Dyno Chip in Chandler.
DaCarGuy69 3 years ago
beautiful
lamthecrowing 3 years ago
Thanks! :)
DaCarGuy69 3 years ago