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Re: new cheap magnum spring upgrade for moderate cams
[Re: patrick]
#32708
12/23/06 09:10 AM
12/23/06 09:10 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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OP
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Grand Haven, MI
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close up of GM springs on the head
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)
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Re: new cheap magnum spring upgrade for moderate cams
[Re: patrick]
#32709
12/23/06 09:13 AM
12/23/06 09:13 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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OP
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Grand Haven, MI
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close up of mag spring and GM spring on the head
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)
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Re: new cheap magnum spring upgrade for moderate cams
[Re: VITC_GTX]
#32711
12/25/06 02:08 PM
12/25/06 02:08 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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they should (2.2L/2.5L retainers). I'd love to see some spring rate and coil bind height info on those MP springs...
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)
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Re: new cheap magnum spring upgrade for moderate cams
[Re: patrick]
#32712
12/25/06 04:37 PM
12/25/06 04:37 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,419
Kalispell Mt.
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Took my computer like an hour to down load them but looks like what I been doing. Glad to here I wasn't off my rocker about this. 2 motors and soon a third running around here set up like this.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: new cheap magnum spring upgrade for moderate cams
[Re: HotRodDave]
#32714
12/30/06 10:04 AM
12/30/06 10:04 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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Quote:
Took my computer like an hour to down load them but looks like what I been doing. Glad to here I wasn't off my rocker about this. 2 motors and soon a third running around here set up like this.
what cams are you running with these springs, out of curiousity. I'm planning on swapping the mag heads on my XE262 shortblock, which will yield like .493/.501 lift, which from my measurements, look marginal, unless I sink the valves about .030 or so.....
for someone currently running a .440-.450 lift cam (which turn into a .470-.480 lift cam) these would be the cat's meow...
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)
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Re: new cheap magnum spring upgrade for moderate cams
[Re: VITC_GTX]
#32715
12/30/06 10:17 AM
12/30/06 10:17 AM
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Joined: Apr 2004
Posts: 1,396
Mass
dgc333
pro stock
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pro stock
Joined: Apr 2004
Posts: 1,396
Mass
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Quote:
Patrick-
Can I get an OEM set off of a 2.2 or 2.5 from a jy that will work instead?
I am using 2.2/2.5 retainers with the MP springs and they work out just fine. You do need to use the locks from the magnum retainers though. The 2.2/2.5 uses a multi-groove lock where the magnum is a single groove.
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Re: new cheap magnum spring upgrade for moderate cams
[Re: dgc333]
#32716
01/23/07 09:35 PM
01/23/07 09:35 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,419
Kalispell Mt.
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Patrick did you find out any more, like preasure on the seat and mabey .500 lift?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: new cheap magnum spring upgrade for moderate cams
[Re: HotRodDave]
#32717
01/24/07 05:34 PM
01/24/07 05:34 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
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Grand Haven, MI
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should be able to calculate that out by looking at the free length and spring rate.
"blueprint" specs were free length of 1.94", and spring rate of 365lb/in, so with the 1.6" IH I measured with the 3100 retainers, that would yield a seat pressure of 124lb, and a .5" lift pressure of 306lb.
the springs I had tested were 1.875" free length, 330lb/in, and the installed height (on my heads) will be ~1.6". so seat pressure should be .275*330, or 91 lbs, and .5" lift will be .775*330, or 256lb.
remember, coil bind was measured at .81" lift on those springs, (1.065") so .5" lift with my measured IH would only leave you .035" before coil bind. I think I'll probably use these springs, but I'll see about sinking the valves .030" or so (to gain IH), which will leave me ~.060 before coil bind with my cam. This seems like the most cost effective way, since I plan on getting a VJ done on them anyway, and I'll probably get a 5 angle 75/60/45/30/15 so sinking them shouldn't hurt flow as much with the 15 degree cut...I'd wager it'll add a CC or two to my combustion chamber, though.
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)
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Re: new cheap magnum spring upgrade for moderate cams
[Re: patrick]
#32718
02/08/07 01:01 AM
02/08/07 01:01 AM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
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I Live Here
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Posts: 12,419
Kalispell Mt.
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Could this go to the archives for future referance? Lots of goo info here, Thanks Patrick!!
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: new cheap magnum spring upgrade for moderate cams
[Re: GO_Fish]
#32719
09/18/07 01:44 PM
09/18/07 01:44 PM
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Joined: Jan 2003
Posts: 17,842
S.E. Michigan
ZIPPY
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S.E. Michigan
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Quote:
Yeah, its kind of odd that they don't publish any of the specs on their Mag springs... you have to dig even to find the installed height.
P5249464 116lbs @ 1.625, 251lbs @ 1.125
P4876062 131 @ 1.625, 305 @ 1.125
Rec'd installed height of 1.64 for both, can't find coil bind height for either one.
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