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Specs on the P5249847 Valve Spring #82693 07/01/08 01:43 PM 07/01/08 01:43 PM
Joined: Apr 2004 Posts: 589 Waynesboro, PA C cuda_tim OP mopar
cuda_tim OP mopar C Joined: Apr 2004 Posts: 589 Waynesboro, PA	Guys, I used P4120249 springs on my 340. They are rated for .430-500 lift. I took several of them off and had them tested at a machine shop, and as expected, they are pretty much shot. A friend has a new set of P5249847's (for basically free), but I'm wondering if they would be much better. I can probably get them (he lives several states away) and have them tested, but I'm wondering if I should bother. Furthermore, I can't seem to find much info on them, except that they do have a better lift .480-.535 at the same installed height. But, I'm concerned that they won't be a simple replacement for my old ones. Anybody have any specs on these, like inside diameter of the outer spring? Thanks! "Robots building robots.... now that's just stupid!" - Will Smith in the movie "I, Robot". '71 Demon (340/727)/'69 Charger (383/727)/'65 Barracuda (273-2V/904)/'66 Coronet (340/727)/'86 Dodge Aries (2.5L)/'78 Dodge Aspen (318-2V/904)

Re: Specs on the P5249847 Valve Spring [Re: cuda_tim] #82694 07/01/08 04:31 PM 07/01/08 04:31 PM
Joined: Jan 2003 Posts: 17,840 S.E. Michigan ZIPPY I Live Here
ZIPPY I Live Here Joined: Jan 2003 Posts: 17,840 S.E. Michigan	Single with damper OD 1.50 Wire Diameter .207 103lbs @ 1.67 260lbs @ 1.27 Install at 1.67 to 1.68 Nothing listed for ID, but figuring 1.50 - .414, just the spring should be in the neighborhood of 1.086. The damper shouldn't account for any more than .086 worth of real estate (probably less than that) so I think you're looking at something slightly over 1" for overall ID, with the damper figured in.

Re: Specs on the P5249847 Valve Spring [Re: ZIPPY] #82695 07/02/08 12:06 PM 07/02/08 12:06 PM
Joined: Apr 2004 Posts: 589 Waynesboro, PA C cuda_tim OP mopar
cuda_tim OP mopar C Joined: Apr 2004 Posts: 589 Waynesboro, PA	Quote: Single with damper OD 1.50 Wire Diameter .207 103lbs @ 1.67 260lbs @ 1.27 Install at 1.67 to 1.68 Nothing listed for ID, but figuring 1.50 - .414, just the spring should be in the neighborhood of 1.086. The damper shouldn't account for any more than .086 worth of real estate (probably less than that) so I think you're looking at something slightly over 1" for overall ID, with the damper figured in. Thanks, Zip! Is it possible you could also give me the specs on the P4120249 springs for comparison? Thanks, Tim... "Robots building robots.... now that's just stupid!" - Will Smith in the movie "I, Robot". '71 Demon (340/727)/'69 Charger (383/727)/'65 Barracuda (273-2V/904)/'66 Coronet (340/727)/'86 Dodge Aries (2.5L)/'78 Dodge Aspen (318-2V/904)

Re: Specs on the P5249847 Valve Spring [Re: ZIPPY] #82696 07/02/08 03:15 PM 07/02/08 03:15 PM
Joined: Jan 2003 Posts: 17,840 S.E. Michigan ZIPPY I Live Here
ZIPPY I Live Here Joined: Jan 2003 Posts: 17,840 S.E. Michigan	single wih damper 1.50od .206 dia. wire 90 lbs @ 1.67 230lbs @ 1.27 install at 1.65 to 1.68

Re: Specs on the P5249847 Valve Spring [Re: ZIPPY] #82697 07/02/08 03:45 PM 07/02/08 03:45 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	No wonder the valves floated on your engine with those valve springs. Not even close to what's required.

Re: Specs on the P5249847 Valve Spring [Re: RobX4406] #82698 07/03/08 04:17 AM 07/03/08 04:17 AM
Joined: Apr 2004 Posts: 589 Waynesboro, PA C cuda_tim OP mopar
cuda_tim OP mopar C Joined: Apr 2004 Posts: 589 Waynesboro, PA	Quote: No wonder the valves floated on your engine with those valve springs. Not even close to what's required. Yea, I'm surprized that they are considered "heavy Duty"... At this point, I'm not even sure the P5249847's will do the trick. I'm using a VooDoo 60402 and it needs a whole lot better set of springs. The ones that Lunati recommends won't fit without machining. I don't really want to take the heads off, just for a set of springs. Especially since it is hard to find a machine shop that I can trust, that won't try to retire on my behalf. I was thinking I might go with the BeeHives from COMP CAMS. Anybody use those? Thanks! "Robots building robots.... now that's just stupid!" - Will Smith in the movie "I, Robot". '71 Demon (340/727)/'69 Charger (383/727)/'65 Barracuda (273-2V/904)/'66 Coronet (340/727)/'86 Dodge Aries (2.5L)/'78 Dodge Aspen (318-2V/904)

Re: Specs on the P5249847 Valve Spring [Re: cuda_tim] #82699 07/03/08 01:38 PM 07/03/08 01:38 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Quote: Quote: No wonder the valves floated on your engine with those valve springs. Not even close to what's required. Yea, I'm surprized that they are considered "heavy Duty"... At this point, I'm not even sure the P5249847's will do the trick. I'm using a VooDoo 60402 and it needs a whole lot better set of springs. The ones that Lunati recommends won't fit without machining. I don't really want to take the heads off, just for a set of springs. Especially since it is hard to find a machine shop that I can trust, that won't try to retire on my behalf. I was thinking I might go with the BeeHives from COMP CAMS. Anybody use those? Thanks! I've used the 26120 comp beehives on a few engines. Good springs but expensive. They require a locater and not sure if that means machining the pad or guide boss. I don't know who suggested using those MP springs with that cam, but, they didn't do you any favors. I'd figure the cost to swap springs in total and go from there. Good luck.

Re: Specs on the P5249847 Valve Spring [Re: RobX4406] #82700 07/03/08 03:37 PM 07/03/08 03:37 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	I used comp 901s on mine with a lunati voodoo roller cam 60710 did not float at 6200 rpm so far,noises over after 5500 but doing well they where with in a few # of the lunati spring they droped on with stock seals and retainers and stock roller gear I have a set of the lunati double with damper for a paper weight now ,they use the same spring on all sb cams roller or flat tap

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