hi

i would like to know if on my 1997 360 magnum with 90 k miles on it could be safe to upgrade to full roller rockers, if so wich brand (Crane?) and where to get them

thanks!

 

I think it's always a good mod for any vehicle. but to be sure maybe you should post this question on the 2nd Gen Ram, since most there have the 5.9 360
Good luck

 

We have them ,but why don't you want to go with a camshaft instead ? Rockers will help a little but a good camshaft would be the way to go .

sales@strippermotorsports.com

 

Here's good article on roller rockers:
http://www.pavementsucks.com/tech/rollerrocker.php
I'd recommend Harlan Sharp rockers, non-adjustable (easy swap). Sure, you can do camshaft instead (rockers sort of making effect of bigger cams) but it's more expensive in parts and labor.

 

I used the Crower adjustable rollers on my old '01 5.9. Next to the B&G flashed pcm, the roller rockers were the biggest mod I put on that truck. 7 to 12hp and 8 to 18tq through the entire rpm range. Big gains.

 

Note that the 5.7 Hemi does a lot of little tricks for more HP but doesn't use Roller Rockers.

At first you might suspect that this was a cost cutting move,
but then consider that the high dollar LS7 V8 from Chevy
is willing to spend for Titanium connecting rods
but also does not use Roller Rockers
See this weblink

http://popularhotrodding.com/tech/0504phr_ls7/



it looks like adding a roller tip to a rocker adds so much valvetrain weight that it becomes a danger to 'valve float' at high rpm - I can't see any other explanation

Did you know that Rudolf Diesel's first successful engine had roller rockers and ran on peanut oil?
(he had spent years trying to get it to run on coal dust first)

 

"The rockers are unique high-ratio pieces, providing a mechanical advantage of 1.8:1, as opposed to the 1.7:1 found on other Gen III and IV engines. Trunions are rollerized, while the body is designed for extremely low inertia and high strength. To route the pushrod away from the intake port walls, the intake rocker (left) is offset by 9mm, eliminating the compromise normally imposed by the pushrod pinch restriction. "

part of them are roller in design. not sure why they wouldnt do the tips unless they show no benifit from their testing.
I had the crower 1.7's on my 360 and the were awesome (now for sale... see the parts for sale forum), the motor seemed to rev easier which was probably from the slight hp/tq increase.

I would say do both rollers (1.6's) and a cam.

 

Dodge leaves off the rollers for cost savings. Chevy leaves off a fully rollerized piece because they are kind to the aftermarket and will let them have some perf upgrades.