[eatmup09]

I have read so many posts about what parts people are using to swap out cams in the 5.7 hemi with the 6.4L cams. Everything from parts to places to order, and there are many different vendors and places to do the work. My question is, can you use all the Mopar parts form a 6.4L to do the swap, cam, springs, retainers and cups. I am doing it in my 2009 RT 6 speed. You can order all the stuff from Allmopar.com or is there a reason to get different brand parts. Just a bit confused.

 

[ChallyTatum]

If you use the performance springs from mopar (BTW you can buy the springs individually which is cheaper than the kit) no additional retainers or shims required.

Link to the spring kit (works with the factory seats, retainers, and locks, and requires no shims or machining of the cylinder head).

Dodge Charger Mopar Performance Valve Springs (Part No: P5160074)

Performance Valve Springs - Gen III HEMI (5.7L/6.4L) These Mopar Performance valve springs were manufactured from the same high-strength material as those found in the Dodge Viper. Designed for high l...

moparonlineparts.com

Post confirming individual springs P/N 68277306AA is the same as in the kit. (this member just did the 6.4 cam in 5.7 swap)

09-10 eagle heads any different then on 2011-up ?? confusion on installed valve spring height.

well trying to find out the specs on installed valve spring height 5.7. some say its 1.99 on ONLY 09 and 10 ? some say its 1.81 on 2011-up ? the eagle head part number are the same from 09-18 as well as the springs (see note on bottom).then how and why would there be any confusion ? i...

www.challengertalk.com

Really no need to replace the lifters if going to a 6.4 cam unless you install a non-MDS cam in a motor that originally cam with MDS.

As for the pushrods, I highly recommend going aftermarket...better quality.

 

[eatmup09]

Thank you very much for the info. This helped me out a lot!!

 

[ChallyTatum]

FWIW I have a thread where I am installing a 6.2 cam (very similar specs to a 6.4 cam) in a 5.7.

6.2 cam swap into 5.7 M6 forced induction

Sounds like a custom keeper tool is in order. Round stock trepanned to the correct diameter for the keepers with a couple of magnets in the trepanned area. Might work.

www.challengertalk.com

 

[Party340]

6.4 springs will not work but the ones listed above should work.

 

[ChallyTatum]

The springs listed above work for a 5.7 and 6.4 (need shims though). 6.4 springs are not ideal as they have higher install heights than the 5.7. Here are some specs which I pulled from various sources including some Hemi books from Shepard. Not 100% sure all these are correct as I have seen discrepancies between sources.

 

[19dart66]

Chally-Tatum I was wondering if in any of your research, if you or one of the other members came up with the coil bind numbers for the Eagle and 6.4 springs. Which would give you a better idea of how much cam lift the springs could actually handle. I tested an Eagle valve spring at one time and I came up with 1.400 coil bind, with what I heard about beehive springs you can run them down to 0.050 before coil bind which would give them a max valve lift of .540 (.590 lift is coil bind). Does anyone have a 6.4 spring they can check.

 

[ChallyTatum]

No exact coil binding numbers but have seen discussions about it.

Understanding Valve Spring Choices

OK it was brought to my attention today that PSI is offering a new taller spring. It is a 1515 part number and goes in at a taller installed height fo

www.lxforums.com

6.4 cam swap valve spring install height

So im new to the forum and have done hours of searching on this topic but ive gotten mixed answers and want to be reassured on this. I have the 6.4 MDS camshaft and comp 26915-16 beehive springs with the hemi retainers. this swap will be going in my 2012 Ram 1500 express. my question is I...

www.ramforumz.com

Since I was not going with large lift cam I did not really spend much time determine coil bind as the performance springs from mopar basically spec the max lift they are able to handle.

 

[19dart66]

I should clarify that the .050 clearance for the beehive springs is something that I read in my research on the web, so always check with spring manufacturers for there specs. I put the PSI 1511 springs on my heads when I changed out the cam for the 6.4 non mds cam and now I have a custom cam with .590 in. and .585 ex. lift and still using the 1511 springs. But just looking at all the specs for the 5.7 eagle springs the 6.4 cam will not work with them and you would need a cam with less than .540 lift to work with the stock springs. The funny thing is the eagle springs have the highest spring rate, even higher than the PSI 1511's. Which are 384# per inch, 6.4 are 389#, and eagles are 413#. The difference is the thickness of the coil wire and number of windings which gives the spring more lift before coil bind, the PSI 1511 has the lowest installed height at 1.800 to the 6.4 2.051/2.016 and eagle at 1.990, PSI has the highest lift .625.

 

[ChallyTatum]

Honestly, I don't take any of the OEM specs at face value. Even the FSM shows the cam journals across engine platforms to be different (although I think for the 5.7 they are using pre-eagle dimensions) which I know is a lie because folks have been swapping cams with no issues. Besides, why use 6.4 springs when the mopar performance spring are designed for higher lift on a 5.7. Plus they can be had dirt cheap if buying them individual using the 68277306AA P/N as borntorun verified is the same as in the kit.

 

[eatmup09]

Thanks for all the help, I feel much better about doing this now.