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Will Stock Valve Springs handle a cam? #680572 04/26/10 10:53 AM 04/26/10 10:53 AM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	Im thinking of putting a cam in the 360 in my truck, it has 308 heads with stock springs and retainers. I dont have much cash so was thinking on cam and lifters as opposed to springs and retainers too. The cam is a Comp 268 Grind heres the specs Basic Operating RPM Range 1,600-5,800 Intake Duration at 050 inch Lift 224 Exhaust Duration at 050 inch Lift 230 Duration at 050 inch Lift 224 int./230 exh. Advertised Intake Duration 268 Advertised Exhaust Duration 280 Advertised Duration 268 int./280 exh. Intake Valve Lift with Factory Rocker Arm Ratio 0.477 in. Exhaust Valve Lift with Factory Rocker Arm Ratio 0.480 in. Valve Lift with Factory Rocker Arm Ratio 0.477 int./0.480 exh. lift Lobe Separation (degrees) 110 Intake Valve Lash 0.000 in. Exhaust Valve Lash 0.000 in. Grind Number CRS XE268H-10 Thanks

Re: Will Stock Valve Springs handle a cam? [Re: EV2RUNNER] #680573 04/26/10 11:14 AM 04/26/10 11:14 AM
Joined: Oct 2005 Posts: 708 Mechanic Falls, Maine 4 4BBodies mopar addict
4BBodies mopar addict 4 Joined: Oct 2005 Posts: 708 Mechanic Falls, Maine	I always replace the springs, with a new cam it is cheap insurance. But if you want to use your old ones, the biggest thing to check for is coil bind. If you were using a cam with .5 inch lift I'd say no, but you might get away with it with the cam you picked. I think I paid around $50 for a set of Engle springs for my 340, and so far so good. It runs excellent, and revs just fine.

Re: Will Stock Valve Springs handle a cam? [Re: EV2RUNNER] #680574 04/26/10 11:15 AM 04/26/10 11:15 AM
Joined: Apr 2010 Posts: 1,216 Under My Car Mopar_Country pro stock
Mopar_Country pro stock Joined: Apr 2010 Posts: 1,216 Under My Car	That camshaft will require some head work, as well as different springs and adjustable valve train. I just put this cam in my 318 http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=619&sb=2 it works very well and I think it will work for you as well. You can buy the kit for just over 300.00 which will include the cam, lifters, springs and retainers, and locks. The kit also has a new timing chain and gears. I would recommend that kit instead of just replacing the cam. Your stock valvetrain will work. Be sure of which way you take the rockers and bar off as they are specific, for oiling purposes.

Re: Will Stock Valve Springs handle a cam? [Re: Mopar_Country] #680575 04/26/10 11:28 AM 04/26/10 11:28 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Use the springs that are rated for the cam. Also a lot of 360's have rotators on the exhaust valves further limiting the amount of cam that can be safely used because they shorten the installed height and travel of the valve. Get rid of the rotators and use a regular retainer just like the ones on the intake valves. 5947838-Rotator.jpg (520 downloads)

Re: Will Stock Valve Springs handle a cam? [Re: MoparforLife] #680576 04/26/10 11:40 AM 04/26/10 11:40 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	use comp #901 springs and stock non-rotator retainers...should add another $60 to the price.... while it's apart, it's smart insurance to replace the t-chain, too... 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: Will Stock Valve Springs handle a cam? [Re: Mopar_Country] #680577 04/26/10 11:45 AM 04/26/10 11:45 AM
Joined: Jan 2003 Posts: 16,123 Grand Haven, MI patrick I Live Here
patrick I Live Here Joined: Jan 2003 Posts: 16,123 Grand Haven, MI	Quote: That camshaft will require some head work, as well as different springs and adjustable valve train. I just put this cam in my 318 http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=619&sb=2 it works very well and I think it will work for you as well. You can buy the kit for just over 300.00 which will include the cam, lifters, springs and retainers, and locks. The kit also has a new timing chain and gears. I would recommend that kit instead of just replacing the cam. Your stock valvetrain will work. Be sure of which way you take the rockers and bar off as they are specific, for oiling purposes. no it doesn't...all it needs are stock rockers, locks, retainers and comp #901 springs. if it's a stock long block 360 with low comp, and in a heavy vehicle, like a truck typically is, I wouldn't go bigger than an XE262. if it has a low stall converter, don't go bigger than an XE256. 1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod SOLD!* 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)

Re: Will Stock Valve Springs handle a cam? [Re: patrick] #680578 04/26/10 11:58 AM 04/26/10 11:58 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: Quote: That camshaft will require some head work, as well as different springs and adjustable valve train. I just put this cam in my 318 http://www.compcams.com/Cam_Specs/CamDetails.aspx?csid=619&sb=2 it works very well and I think it will work for you as well. You can buy the kit for just over 300.00 which will include the cam, lifters, springs and retainers, and locks. The kit also has a new timing chain and gears. I would recommend that kit instead of just replacing the cam. Your stock valvetrain will work. Be sure of which way you take the rockers and bar off as they are specific, for oiling purposes. no it doesn't...all it needs are stock rockers, locks, retainers and comp #901 springs. if it's a stock long block 360 with low comp, and in a heavy vehicle, like a truck typically is, I wouldn't go bigger than an XE262. if it has a low stall converter, don't go bigger than an XE256. I agree with you Patrick. Have seen a lot bigger more aggressive cams with out any additional head work other than some decent springs.If much over 500 lift a trim on the guides but that is nothing scientific and cam be done at home as long as you use regular umbrella valve seals

Re: Will Stock Valve Springs handle a cam? [Re: EV2RUNNER] #680579 04/26/10 12:21 PM 04/26/10 12:21 PM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Why not go this route http://www.summitracing.com/parts/CCA-K20-223-3/

Re: Will Stock Valve Springs handle a cam? [Re: Dodgem] #680580 04/26/10 02:21 PM 04/26/10 02:21 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	BTW pictured is the partial results of using a .474 lift cam with stock springs and rotators. also took blew out a head, cam, hole in block, and couple bent rods. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: Will Stock Valve Springs handle a cam? [Re: MoparforLife] #680581 04/26/10 10:26 PM 04/26/10 10:26 PM
Joined: Apr 2007 Posts: 2,327 Glendale, AZ 6 69L78Nova Banned. Forever.
69L78Nova Banned. Forever. 6 Joined: Apr 2007 Posts: 2,327 Glendale, AZ	I ran a MP509 with stock 587s for a LONG time with no problems whatsoever 1969 Nova 454/M21/3.31 Mild mid-11 second weekend cruiser 1994 F150 XLT Super Cab 2WD 5.0/4R70W/3.55 (Daily driver)

Re: Will Stock Valve Springs handle a cam? [Re: 69L78Nova] #680582 04/26/10 10:49 PM 04/26/10 10:49 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: I ran a MP509 with stock 587s for a LONG time with no problems whatsoever Some people get lucky. You also must have found one without rotators. No way that it would have gone with rotator retainers.

Re: Will Stock Valve Springs handle a cam? [Re: MoparforLife] #680583 04/26/10 11:15 PM 04/26/10 11:15 PM
Joined: Apr 2007 Posts: 2,327 Glendale, AZ 6 69L78Nova Banned. Forever.
69L78Nova Banned. Forever. 6 Joined: Apr 2007 Posts: 2,327 Glendale, AZ	No, it did not have rotators 1969 Nova 454/M21/3.31 Mild mid-11 second weekend cruiser 1994 F150 XLT Super Cab 2WD 5.0/4R70W/3.55 (Daily driver)

Re: Will Stock Valve Springs handle a cam? [Re: 69L78Nova] #680584 04/27/10 07:04 AM 04/27/10 07:04 AM
Joined: Feb 2003 Posts: 12,675 Columbia, CT M moper I Live Here
moper I Live Here M Joined: Feb 2003 Posts: 12,675 Columbia, CT	No, you need springs to match the cam as mentionned... Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.

Re: Will Stock Valve Springs handle a cam? [Re: EV2RUNNER] #680585 04/27/10 07:37 AM 04/27/10 07:37 AM
Joined: Sep 2004 Posts: 22,873 Chicken coop dustergirl340 Chicken Little
dustergirl340 Chicken Little Joined: Sep 2004 Posts: 22,873 Chicken coop	Get the springs. Do it right or don't do it at all. You know this hobby ain't cheap.

Re: Will Stock Valve Springs handle a cam? [Re: dustergirl340] #680586 04/27/10 11:13 AM 04/27/10 11:13 AM
Joined: Apr 2010 Posts: 1,216 Under My Car Mopar_Country pro stock
Mopar_Country pro stock Joined: Apr 2010 Posts: 1,216 Under My Car	I misspoke when I said it required head work. What I meant to say, to clarify, that some work will need to be done to the heads as in springs, locks etc. Comp cams DOES recommend running an adjustable valve train with the XE268H [7] Stock springs cannot be used. [23] Includes special shafts & spacers. [37] Adjustable valve train required. I would suggest calling comp cams tech line for your peace of mind. You certainly don't want what you see in the pic's posted here in your day.

Re: Will Stock Valve Springs handle a cam? [Re: EV2RUNNER] #680587 04/27/10 11:25 AM 04/27/10 11:25 AM
Joined: Jan 2006 Posts: 132 Kingman, Az Scojodak member
Scojodak member Joined: Jan 2006 Posts: 132 Kingman, Az	As mentioned several times, get the rated springs for the cam. Even if you dont bind the springs, you'll be asking why there's no performance gain because the valves are bouncing off the seats at 5000 rpm. Just my $.02 Dakota for life!

Re: Will Stock Valve Springs handle a cam? [Re: Scojodak] #680588 04/27/10 01:29 PM 04/27/10 01:29 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Funny you mention 5000 rpm because I put an XE268 in a 360 with stock springs when I was younger and 5000 was like a rev limiter kicked in, I even tried shimming the springs to virtual coil bind and it would not do noticably better, when I put in good springs it was fine to 6000, and just smoothly lost power instead of all the popping and crap with the stock springs. It had ported 302 heads on it and made great TQ. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Will Stock Valve Springs handle a cam? [Re: MoparforLife] #680589 04/28/10 10:48 AM 04/28/10 10:48 AM
Joined: May 2004 Posts: 433 St.Clairsville Ohio EV2RUNNER OP mopar
EV2RUNNER OP mopar Joined: May 2004 Posts: 433 St.Clairsville Ohio	Quote: BTW pictured is the partial results of using a .474 lift cam with stock springs and rotators. also took blew out a head, cam, hole in block, and couple bent rods. Valve Springs suddenly look very CHEAP After viewing this pic...My Mind's made up Thanks all!

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