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Topic: Proform Roller Rockers FYI (Read 316 times)
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Ryan (Strange246)
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Not sure if anyone is running or plan on running the Proform Roller Rockers, but I just noticed that the latest Mancini flyer has a note about them that they are NOT reccomended for cams with lifts over .484"....Wish I had known that, mine is .510"....Anyone need a set of pretty blue roller rockers? Last time I'll cheap out on parts...  |
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StripeHOG
Full Member
 Offline
Posts: 167
Greentown, IN
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there the only one's that tell you that too Jeg's and Summit say nothing  mancini racing |
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Andrew Brough 372Z 69 Dart GTS  1.46 60' 7.06 95mph so far |
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Ryan (Strange246)
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there the only one's that tell you that too Jeg's and Summit say nothing mancini racing Yeah how nice, I actually called Summit when I ordered those and asked if they had any complaints etc about them "Oh no sir, they're a very popular alternative to Crane's" .....Maybe the guy was a chebby tech guy  |
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moparteacher
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I don't think you'll have any problems with .510 lift on these rockers. There's not a whole lotta difference between .484 and .510. I would run them. Just make sure you have a good oiling system and springs that are not overkill. Do the springs match the cam? If so, I think you'll be find. Mancini is probably playing it safe to avoid combacks from customers building higher rpm, higher rocker load engines. I don't think you'll find a whole lotta difference beween the Mopar Performance rockers, Dove rockers, and the Proform rockers.
Moparteacher
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Moparteacher
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Ryan (Strange246)
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I don't think you'll have any problems with .510 lift on these rockers. There's not a whole lotta difference between .484 and .510. I would run them. Just make sure you have a good oiling system and springs that are not overkill. Do the springs match the cam? If so, I think you'll be find. Mancini is probably playing it safe to avoid combacks from customers building higher rpm, higher rocker load engines. I don't think you'll find a whole lotta difference beween the Mopar Performance rockers, Dove rockers, and the Proform rockers.
Moparteacher
You may be right but with close to $7k in the motor I'm not going to risk it...I'd hate to be wrong and have them break at 5-6,000 rpm... |
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bentwheel43
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I ran them with .501"/.501" 282*/292* with solid flat,6.92 1/8 mile they did good.The only thing the roller is small and I wish the plylocks were bigger&harder.WE didn't brake one ,when I took them off they looked new.My friend has crane gold it the same size plylock,he broke one(plylock) he called jegs to get some they toll him use ARP ones. Make sure you have about 3 or 4 theads showing.We shift at 5800rpm the Proform or the Crane gold don't have rollerbearing on the shaft and the same size plylocks. ![\/][](http://www.bigblockdart.com/Smileys/classic/finger020.gif) Maybe the steel is a better grade.The spring pressure is something to think about ,we both had comp 911 springs.Mine was .501" and his .509",his was a crane broke 1 lock, not like the bottom like in the hotrod mag. in over 5 years. The Proform was run hard 2 years  .Make sure the oil holes and pointing at the valves. you are like my Mother worryed about s--t before it happens. GOOD LUCK , BENT |
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section 8 racing , we're nuts about racing"""'
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vitamindart
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no i'm with ya ryan i cheaped out a couple years back thought the valves in my indy heads where ok the machine shop even said they should be fine not even 50 miles later one broke and trashed my engine from now on i'll spend a little more not and save a lot later
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Tubbed440
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no i'm with ya ryan i cheaped out a couple years back thought the valves in my indy heads where ok the machine shop even said they should be fine not even 50 miles later one broke and trashed my engine from now on i'll spend a little more not and save a lot later
So stock Indy valves are junk?  Inquiring minds want to know. And as far as the rocker issue goes, I have been running Harland sharps for about 7 years now. Some have had trouble, but I have had none. I only run solid flat tappet cams though...... |
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'74 Challenger, Full cage, 500 inch Wedge, 4L80E, ladder bars,
Coil-overs - 325/50/15 MT drag radials - Street Car!
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bentwheel43
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I here if you didn't seat the keepers by tapping them a little with a hammer they mite come off at about 50 miles |
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section 8 racing , we're nuts about racing"""'
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440turner
Jr. Member
Offline
Posts: 70
BigBlockDart.Com
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I ran those garbage roller rockers in my newly rebuilt engine w/a .557 mech. cam and within 10 mles I busted one in half (rocker shaft hole),wich bent its pushrod throwing it into its neighbor and bending it. I took them back to mancini and got the ductile cranes and never had a problem since. lesson learned.......cheap aluminum roller rockers are not were you want to go
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sycboi
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My nephew screwed at least 2 of those rockers up just sitting in the driveway...the engine never made it on the street with them...
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SuperBeast
'70 Dart
Roller 383 w/ much aluminum
Viper T-56, StreetTwin, hydraulic throwout, HD Dana 60, AlterKtion
An enforcer for the Mopar Mafia!
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bentwheel43
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how much spring pressure? with .557 cam
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section 8 racing , we're nuts about racing"""'
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