Magnum valve springs

[motorpirate]

Doing a magnum swap and need valvespring advice.
What valvesprings do you think for a stock cammed Magnum that may see 5500 RPM in bracket use?
And later with this cam?Voodoo Hydraulic Roller Cam - Chrysler 273-360 (W/ Long Snout) 264/270 - Lunati Power

 

[Abodybomber]

Hughes Engines 1110 with matching retainers ,my good man.

 

[jdsduster]

i have the stock springs off a 300 hp 360 crate magnum.your welcome to them

 

[motorpirate]

i have the stock springs off a 300 hp 360 crate magnum.your welcome to them

That would be awesome!!!

 

[motorpirate]

That would be awesome!!!

In case you were wondering, they will be going here...Another weekend racing with Dany

 

[93ragtop]

I may be wrong, but double check those 360 300 hp crate engine springs.
I believe those are stock springs, and your cam has .517 lift with the factory magnum rockers.....
IMO that is way too much lift for stock springs.
Again, ask others who know, but that is my understanding......

 

[motorpirate]

I may be wrong, but double check those 360 300 hp crate engine springs.
I believe those are stock springs, and your cam has .517 lift with the factory magnum rockers.....
IMO that is way too much lift for stock springs.
Again, ask others who know, but that is my understanding......

these will be for the factory EFI Durango cam only. We will be going with the Hughes versions when the cam change happens next year.

 

[Bobzilla]

The 2002 Mopar Performance catalog says the service part number valve spring for both the 300hp and 380hp crate engines was part number P5249464, so it should work perfectly for a stock Durango camshaft.
The problem is the retainers. The crate motors and service heads all used different retainers than factory Magnum beehive setup. Just have jdsduster check the springs he offered are straight, not beehives, and that will verify it.

 

[motorpirate]

The 2002 Mopar Performance catalog says the service part number valve spring for both the 300hp and 380hp crate engines was part number P5249464, so it should work perfectly for a stock Durango camshaft.
The problem is the retainers. The crate motors and service heads all used different retainers than factory Magnum beehive setup. Just have jdsduster check the springs he offered are straight, not beehives, and that will verify it.

Here us what I have

 

[motorpirate]

Did I read on here somewhere the P springs were used with 2.2 retainers??

 

[MoparLeo]

What is wrong with the stock springs ?

 

[motorpirate]

What is wrong with the stock springs ?

Too lite for any real RPM and no factory computer/rev limiter to protect them.

 

[mderoy340]

Did I read on here somewhere the P springs were used with 2.2 retainers??

Yes the 2.2 works and the 300 crate has the upgraded springs.