5.7 Hemi Cam

Gborohoo · Jun 20, 2017

I'm looking to get a Comp 268 cam for my 2004 1500 Hemi. Is there anything else I need to upgrade/swap? Also, about how much would it cost to have the new cam installed?

ST-8 · Jun 20, 2017

At least 6.1 springs an rods

xtremewlr · Jun 20, 2017

Have a look at this thread - http://www.ramforum.com/f50/cam_parts_list-16607/

chrisp2493 · Jun 20, 2017

Any particular reason for the 268? Most guys went with the 260 for the low end torque gains, that's what I'm doing

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jotin · Jun 20, 2017

chrisp2493 said:
Any particular reason for the 268? Most guys went with the 260 for the low end torque gains, that's what I'm doing

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I loved the 268 in my 03 Ram. I did the 03-05 swap and it was a beastly truck in a short bed short cab. The 268 really isn't a bad cam on the low end as people say it is. It's a nice cam in my opinion all around. If I decide to cam my wife's charger srt and my magnum srt , they'll both get the 268 cam.

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jotin · Jun 20, 2017

And yes, I'd do new lifters (make sure they are non mds lifters), 6.1 pushrods, and 6.1 valve springs on intake and exhaust. And then a good tune for the cam.

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Cowboy770 · Sep 9, 2018

Would the stall converter need to be changed?

chrisp2493 · Sep 9, 2018

Cowboy770 said:
Would the stall converter need to be changed?

Depends on the cam. It will help though

I Bleed Ram Trucks

Cowboy770 · Sep 9, 2018

I’m thinking about the 268 cam

LoneWolf3574 · Sep 10, 2018

ST-8 said:
At least 6.1 springs an rods

Not trying to jack your thread jotin, why 6.1 springs and rods ST-8? I'm curious about the difference and what makes them preferred since I've seen so many people recommending them on the 5.7.

jotin · Sep 10, 2018

LoneWolf3574 said:
Not trying to jack your thread jotin, why 6.1 springs and rods ST-8? I'm curious about the difference and what makes them preferred since I've seen so many people recommending them on the 5.7.

Heavier springs. Meant for more higher lift cams, and a cheap upgrade for a nicer cam. The 5.7 ones are weak and will break under a new high lift cam.

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chrisp2493 · Sep 10, 2018

Cowboy770 said:
I’m thinking about the 268 cam

Cam, stall and gears will give you a really fun truck. I just got 4.56 gears in and have a 3200 stall, it’s a lot of fun

I Bleed Ram Trucks

HemiLonestar · Sep 10, 2018

jotin said:
Heavier springs. Meant for more higher lift cams, and a cheap upgrade for a nicer cam. The 5.7 ones are weak and will break under a new high lift cam.

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The pushrods are to make up the difference in base circles. The 6.1 cam base circle (which is what all the aftermarket 03-08 hemi cams are based on) is a different size than the stock 5.7 base circle. The 6.1 exhaust springs are stronger for higher lift cams and ensures no float or breakage up to a certain lift. Depending on the miles, you don't need to change the lifters; most people don't unless they messed one up or they're pulling the heads anyway because you have to remove the heads to swap lifters.

ST-8 · Sep 10, 2018

HemiLonestar said:
The pushrods are to make up the difference in base circles. The 6.1 cam base circle (which is what all the aftermarket 03-08 hemi cams are based on) is a different size than the stock 5.7 base circle. The 6.1 exhaust springs are stronger for higher lift cams and ensures no float or breakage up to a certain lift. Depending on the miles, you don't need to change the lifters; most people don't unless they messed one up or they're pulling the heads anyway because you have to remove the heads to swap lifters.

LoneWolf3574 said:
Not trying to jack your thread jotin, why 6.1 springs and rods ST-8? I'm curious about the difference and what makes them preferred since I've seen so many people recommending them on the 5.7.

He wrote it out well

LoneWolf3574 · Sep 10, 2018

Hmm, near as I can tell, I've still got the factory springs and rods on mine (154k). Might be worth it to upgrade if just for the peace of mind they'll provide. You guys are a terrible influence, giving me ideas that will get me in trouble with the wife.

HemiLonestar · Sep 10, 2018

Don't change to 6.1 springs and pushrods unless you're gonna cam it. If you use them on your stock cam everything will be too loose, remember the base circles are different. It's a bout a tenth (.10) difference overall; you won't get proper lifter preload.

LoneWolf3574 · Sep 11, 2018

HemiLonestar said:
Don't change to 6.1 springs and pushrods unless you're gonna cam it. If you use them on your stock cam everything will be too loose, remember the base circles are different. It's a bout a tenth (.10) difference overall; you won't get proper lifter preload.

Good to know, thank you

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5.7 Hemi Cam

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