Confused on Roller Rockers

[khodne]

I'm about to do the run in on my motor and am questioning the rockers I have after reading many of the posts on this site.  I had my engine built before I found this site and would have gone in another direction with some of my engine choices.

I have a 500" with a Comp Cams XE 295 251/257 .564 lift, Stealth heads with the 440 source roller rockers, Indy dual plain intake, Holley 850DP, MSD billet distributor with a 6al box, and Firecore wires.  It's a 4 speed with a Dana which I just switched to 4.10's using MT ET's 325/50/15's.

I am leery of the rockers I have in my engine after reading the posts of them breaking.

My question is what rockers would you recommend for this build and how do I know my spring pressure?  I have spent a lot of time looking at post and am more confused than ever on this matter.

[elacruze]

The only way to know your spring pressure with certainty is to remove them, measure the installed height at the head, then use a spring scale to measure the pressure @ installed height, then measure installed height minus valve lift.

I'm using Hughes Engines 1.6 Rockers with .572" lift and 165# seat, 380# open pressures. The Hughes website has a bunch of good information about them. The general consensus is that T&D or Jesel are top-shelf but very expensive. Hughes claims they're a close #3 behind that, much less expensive but more $$ than the rest.
There are a jillion people using every sort of rocker out there, and they don't all go bad. I just let my conscience and pocketbook be my guide. Certainly, if you don't know your spring pressures, you should.

[BSB67]

It is always easy to spend someone else's money.

If your on a tight budget, and you know what to look for, used Crane or Isky ductile iron rockers can be a great value and provide long term worry free operation even if you step up your cam/springs in the future.  I'm always curious that these never seem to get much interest from those seeking a good value and are on a tight budget.  I've used Crane golds and Comp Pro Magnums as well.  I think any of these would be much better than the inexpensive fulcrum roller rockers that are out there.

If you know the spring brand and part number that is installed, you can look up the specification, which is close.  I think Comp recommends the 924 for that cam, which IMO, isn't that much.

[BSB67]

I do like your choice in intake and carb. 

[khodne]

Thank you both for your information and answers.

[elacruze]

It is always easy to spend someone else's money.

If your on a tight budget, and you know what to look for, used Crane or Isky ductile iron rockers can be a great value and provide long term worry free operation even if you step up your cam/springs in the future.  I'm always curious that these never seem to get much interest from those seeking a good value and are on a tight budget.  I've used Crane golds and Comp Pro Magnums as well.  I think any of these would be much better than the inexpensive fulcrum roller rockers that are out there.

If you know the spring brand and part number that is installed, you can look up the specification, which is close.  I think Comp recommends the 924 for that cam, which IMO, isn't that much.

I shouldn't have assumed you cared to stay with roller rockers. Certainly, if your springs aren't too stiff you can use the iron rockers.

[firefighter3931]

The Stealth valvesprings are identical to the Eddy RPM pieces so you don't really need a roller rocker with them. You're looking at 130 lbs on the seat and 340 lbs open pressure....fine with a flat tappet cam and non rollerized adjustable rocker. 

If it were mine i'd be looking at a set of the crane/isky ductile iron adjustables for a bulletproof valve train. 



Ron

[khodne]

Called Summit on the Cranes.  They are on back order until 12/20.  I looked for Isky's and seem to only find the for SB.

[firefighter3931]

Check with Mancini 


Ron

[khodne]

Mancini's didn't have them either.

[elacruze]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=200551822643&ssPageName=STRK:MEWAX:IT#ht_500wt_1053

[firefighter3931]

There is a set of Crane iron rockers with spacer springs for sale on Moparts for $125 

http://board.moparts.org/ubbthreads/showflat.php?Cat=0&Board=Race&Number=6329635&page=0&fpart=2

* halfway down page 2 by member Ari440....check em out


Ron

[khodne]

Just PM'd him.  Thanks Ron.