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How much horsepower will a stock 340 bock handle? #1411864 03/31/13 12:46 AM 03/31/13 12:46 AM
Joined: Mar 2013 Posts: 755 Tri Cities TN area H Hailtheleaf538 OP Never Misses A Coffee Break
Hailtheleaf538 OP Never Misses A Coffee Break H Joined: Mar 2013 Posts: 755 Tri Cities TN area	Approximate of course. Am wanting to keep the smallblock route, and am curious how much they will hold up to reliably....thanks in advance. Last edited by HailTheLeaf538; 03/31/13 12:47 AM. Organized Labor: The people that brought you the weekend. If you can't grasp the meaning of the phrase "tongue in cheek", don't respond. 1970 H code Swinger, Top Banana 2012 Liberty Jet 4x4 True Blue Pearl

Re: How much horsepower will a stock 340 bock handle? [Re: Hailtheleaf538] #1411865 03/31/13 02:25 AM 03/31/13 02:25 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	Most will agree that 550-600 or so is about it, and even at 600 you will be running in the riskier zone when dependability is the concern. That said quite a few guys have engines running 650-700 with no reported problems. A lot will depend on how good the block is that you start with, and how well it's machined and put together.

Re: How much horsepower will a stock 340 bock handle? [Re: ScottSmith_Harms] #1411866 03/31/13 02:39 AM 03/31/13 02:39 AM
Joined: Aug 2005 Posts: 5,999 Salem Grizzly Moparts Proctologist
Grizzly Moparts Proctologist Joined: Aug 2005 Posts: 5,999 Salem	Welcome to the board. If you search around the race section you will see it has been discussed a little. In a nut shell, photos were asked to be produced of an actual block failure for LA series engines and none came up. Some of those guys are pushing 700 and a bit beyond without going "R" block. Mo' Farts Moderated by "tbagger".

Re: How much horsepower will a stock 340 bock handle? [Re: ScottSmith_Harms] #1411867 03/31/13 02:45 AM 03/31/13 02:45 AM
Joined: Mar 2013 Posts: 755 Tri Cities TN area H Hailtheleaf538 OP Never Misses A Coffee Break
Hailtheleaf538 OP Never Misses A Coffee Break H Joined: Mar 2013 Posts: 755 Tri Cities TN area	Quote: Most will agree that 550-600 or so is about it, and even at 600 you will be running in the riskier zone when dependability is the concern. That said quite a few guys have engines running 650-700 with no reported problems. A lot will depend on how good the block is that you start with, and how well it's machined and put together. cool, thanks....that's probably about right at the limit of what I'm wanting to do. Like I said, with the car, Im wanting to build a street legal drag car, to drive around town once in a while....Ever since I was a kid, I had always been infatuated with the KOS cars, especially the few small block ones. Not wanting to go quite that serious, but you get the point. Hell, I don';t know, I may end up realizing that I want to build something a little milder to enjoy on the streets a little more. Thanks for the input, it's much appreciated. Organized Labor: The people that brought you the weekend. If you can't grasp the meaning of the phrase "tongue in cheek", don't respond. 1970 H code Swinger, Top Banana 2012 Liberty Jet 4x4 True Blue Pearl

Re: How much horsepower will a stock 340 bock handle? [Re: Grizzly] #1411868 03/31/13 02:50 AM 03/31/13 02:50 AM
Joined: Mar 2013 Posts: 755 Tri Cities TN area H Hailtheleaf538 OP Never Misses A Coffee Break
Hailtheleaf538 OP Never Misses A Coffee Break H Joined: Mar 2013 Posts: 755 Tri Cities TN area	Quote: Welcome to the board. If you search around the race section you will see it has been discussed a little. In a nut shell, photos were asked to be produced of an actual block failure for LA series engines and none came up. Some of those guys are pushing 700 and a bit beyond without going "R" block. Thanks, I've lurked around the forums for a bit, wanting to get another old Mopar, and this one kinda fell into my la[p...1970 swinger 340/727 car, 3.91 suregrip, manual discs, top banana, go wing, rallyes, runs and drives for CHEAP. I do have a 2012 Liberty, but I don't think that counts for a classic mope....... Seems like for the most part, everyone around here is pretty friendly, and willing to help. As far as the block goes, I didn't really wanna go the srious R block route....Was wanting to see what was possible with a stock block and a top quality bottom end. Thanks brother. Organized Labor: The people that brought you the weekend. If you can't grasp the meaning of the phrase "tongue in cheek", don't respond. 1970 H code Swinger, Top Banana 2012 Liberty Jet 4x4 True Blue Pearl

Re: How much horsepower will a stock 340 bock handle? [Re: Hailtheleaf538] #1411869 03/31/13 03:53 AM 03/31/13 03:53 AM
Joined: Aug 2005 Posts: 5,999 Salem Grizzly Moparts Proctologist
Grizzly Moparts Proctologist Joined: Aug 2005 Posts: 5,999 Salem	Quote: I do have a 2012 Liberty, but I don't think that counts for a classic mope....... You're welcome. The Liberty does count for keeping it real though. Even if you don't hit the big hp numbers, that Swinger will make up for it in light weight. Mo' Farts Moderated by "tbagger".

Re: How much horsepower will a stock 340 bock handle? [Re: Grizzly] #1411870 03/31/13 10:55 AM 03/31/13 10:55 AM
Joined: Jan 2003 Posts: 4,323 NY NY 3 340duster340 master
340duster340 master 3 Joined: Jan 2003 Posts: 4,323 NY NY	i dont know how street-able the 500+ HP small blocks are. RB would be the way to go to get that kind of power and be a little more mild mannered. are you looking to do this naturally aspirated? i looked into building a small block and after thinking it out went RB instead. parts and labor are basically the same, and my thinking was to have a motor that was not "maxed out" so i could have room to upgrade in the future if i wanted to.

Re: How much horsepower will a stock 340 bock handle? [Re: 340duster340] #1411871 03/31/13 11:01 AM 03/31/13 11:01 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	I can tell you that a 500HP (or higher) small block can be built to be very streetable and run on pump gas, it's all about the build combo. For starters use a stroker crank, they make street driving a big HP SB just as nice as a similarly built big block.

Re: How much horsepower will a stock 340 bock handle? [Re: ScottSmith_Harms] #1411872 03/31/13 02:06 PM 03/31/13 02:06 PM
Joined: Mar 2013 Posts: 755 Tri Cities TN area H Hailtheleaf538 OP Never Misses A Coffee Break
Hailtheleaf538 OP Never Misses A Coffee Break H Joined: Mar 2013 Posts: 755 Tri Cities TN area	Quote: I can tell you that a 500HP (or higher) small block can be built to be very streetable and run on pump gas, it's all about the build combo. For starters use a stroker crank, they make street driving a big HP SB just as nice as a similarly built big block. Yeah I definately wanna keep it a smallblock......been keeping uo the last several years with thw advancements in heads and stroker kits.......seems like back in the 90's all you had was w2's for the most part(or thats about all you would see anyways )...... Will have a lot of questions to ask on the race forum I'm sure as it seems like there are lalot of knowledgeable guys with fast smallblocks on here. Can't wait to pick this car up, and who knows I may realize I don't wanna go that serious and might enjoy cruiaing it a bit more.....we'll see.thanks fir the info brother..... Organized Labor: The people that brought you the weekend. If you can't grasp the meaning of the phrase "tongue in cheek", don't respond. 1970 H code Swinger, Top Banana 2012 Liberty Jet 4x4 True Blue Pearl

Re: How much horsepower will a stock 340 bock handle? [Re: Hailtheleaf538] #1411873 03/31/13 02:48 PM 03/31/13 02:48 PM
Joined: Mar 2005 Posts: 386 Maryland reno340 enthusiast
reno340 enthusiast Joined: Mar 2005 Posts: 386 Maryland	If it is a real "H" code car, I would be careful as to what mods you do to it. They are fairly rare. "There are only three real sports, Mountain climbing, Bull Fighting and Auto Racing. The rest are just games" - Earnest Hemmingway If you can't run with the big dogs, stay on the porch!! https://www.youtube.com/watch?v=_xQJtN1_6DU

Re: How much horsepower will a stock 340 bock handle? [Re: reno340] #1411874 03/31/13 02:58 PM 03/31/13 02:58 PM
Joined: Mar 2013 Posts: 755 Tri Cities TN area H Hailtheleaf538 OP Never Misses A Coffee Break
Hailtheleaf538 OP Never Misses A Coffee Break H Joined: Mar 2013 Posts: 755 Tri Cities TN area	Quote: If it is a real "H" code car, I would be careful as to what mods you do to it. They are fairly rare. Definately a real deal. I dusted off my old books yesterday and took with me.........340/727 top banana, benh seat, go wing, rallye dash, manual front discs, runs and drives. Needs some work but thsts part of the fun.....hey I lucked out for once on this one.... Organized Labor: The people that brought you the weekend. If you can't grasp the meaning of the phrase "tongue in cheek", don't respond. 1970 H code Swinger, Top Banana 2012 Liberty Jet 4x4 True Blue Pearl

Re: How much horsepower will a stock 340 bock handle? [Re: Hailtheleaf538] #1411875 04/01/13 08:12 PM 04/01/13 08:12 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Whatta car! They ruled the streets where I grew up, wasting those 396 chevelles and goats and anything with the blue oval. My eyes are almost turning green..... R.

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