Stock and MP Valve Spring Specs ?

[jeepxj3]

I have tried to search/look and can't find what are the exact specs for the Stock valve springs and the Mopar Perf 5249464 valve springs.

Here is what I have found-

[email protected]", [email protected]"(0.424"lift), [email protected]"(0.440"lift), bind at 1.140", safe to 0.440"lift, 295-327lb/in.

MP5249464- [email protected]", [email protected]"(0.424"lift), [email protected]"(0.450"lift), [email protected]"(0.500"lift), safe to 0.525"lift, 270lb/in.

Does anyone know the exact specs? @1.64"installed height and spring rate?

I found some beehive springs with the following specs as possible swaps ?-
#1213-- [email protected]", [email protected]"(0.500"lift), 191lb/in. -probably just a little lite
#1214- [email protected]", [email protected]"(0.500"lift), 275lb/in. -?just right?

I am looking for valve springs that will let the cam live at 0.518" lift. Any Ideas?

[beiwulf]

not sure if this is the information you seek but here are some specs for stock 4L i6

Valve Springs
Free Length (Approx) ….. 46.22 - 47.65 mm (1.82 - 1.876in.)
Spring Tension --
Valve Close ……………316 to 351 N @ 41.656 mm
_____________________ (71 to 79 lbf. @ 1.64 in.)
Spring Tension --
Valve Open ……………898.6 to 969.7 N @ 30.89 mm
______________________(202 to 218 lbf. @ 1.216 in.)
Inside Diameter ………….21.0 mm to 21.51 mm
_________________________(0.827 to 0.847 in.)


Brian

[jeepxj3]

Thanks, that helps.

STOCK---60-71-79[email protected]", 184-202-218[email protected]"(0.424"lift), [email protected]"(0.440"lift), bind at 1.140", safe to 0.440"lift, 295-327lb/in.

[RenoF250]

not sure if this is the information you seek but here are some specs for stock 4L i6

Valve Springs
Free Length (Approx) ….. 46.22 - 47.65 mm (1.82 - 1.876in.)
Spring Tension --
Valve Close ……………316 to 351 N @ 41.656 mm
_____________________ (71 to 79 lbf. @ 1.64 in.)
Spring Tension --
Valve Open ……………898.6 to 969.7 N @ 30.89 mm
______________________(202 to 218 lbf. @ 1.216 in.)
Inside Diameter ………….21.0 mm to 21.51 mm
_________________________(0.827 to 0.847 in.)


Brian

Rockauto shows 2 springs 1.8 and 2.1" free length. Mine were 2.1"

[SilverXJ]

Mopar performance:
Free length: 2.06"
Rate: 271
113#@1.64"
225#@1.228"
232#@1.205"

[beiwulf]

found this thread… hope it helps.

http://board.moparts.org/ubbthreads/sho ... 083&page=0

Parts reference on thread

Mopar performance:
P5249464 springs
P4876062 springs

Hughes Engines:
HUG 1110 springs