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#1
09-02-2015, 12:29 PM
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PRW stainless roller rockers
I finally found out where the metal on my magnetic drain plug is coming from. You guessed it, from the roller rocker arms.
All of them are failing on the roller tip end. They run-out as far as .007" so the insides of the rollers are not wearing even, and some have a LOT of clearance, and basically wobble around on the pins. They have always had a few thousandths run-out from day one, which I noticed re-running the valves after we broke in the engine. In the past few months I've been getting a lot more noise from the valve train than normal, so pulled off the valve covers today to investigate and found the troubles......Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#2
09-02-2015, 12:35 PM
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So are the Crower stainless rockers the only rockers worth spending money on? It seems like iv'e seen bad press about every other rocker out there except maybe Harland Sharp.
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 -1967 GTO HO Restomod. PKMM 433ci, SilverSport T56 Magnum 6spd, Moser 9", SC&C and a bunch of other pro touring goodies - Build Thread http://forums.maxperformanceinc.com/...615847&page=23 |
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#3
09-02-2015, 01:07 PM
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watch for used rockers 4SALE now
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color me gone |
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#4
09-02-2015, 01:52 PM
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...and people laughed when I tossed my aluminum rockers for stamped steel OEM units.
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#5
09-02-2015, 01:53 PM
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Quote:
Cliff, What's the approx price on the Crower Rockers?
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#6
09-02-2015, 02:07 PM
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Cliff has a set of Crower stainless rockers on hand
 .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#7
09-02-2015, 02:09 PM
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Quote:
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#8
09-02-2015, 02:10 PM
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Quote:
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Karl 
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#9
09-02-2015, 02:33 PM
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The set of Crower rockers I passed on to Cliff were 1.65 ratio. If memory serves me right they were actually Ford rocker arms. Maybe Cliff can confirm the markings on them.
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#10
09-02-2015, 03:11 PM
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I am going with a set of Crane on my new build as suggested by Straub technology.
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1969 GTO 4spd. Antique Gold/black, gold int. 1969 GTO RAIII 4spd. Verdoro Green/black, black int. 1969 GTO 4spd. Crystal Turquoise, black int. 1970 GTO 4spd VOE Pepper Green, green int. 1967 LeMans 428 Auto. Blue, black int. |
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#11
09-02-2015, 03:26 PM
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Steve, we installed them in the engine today when we removed the PRW's, working fine and the valve train is back to so quiet that it's scary!
The engine will be coming out soon, and we'll be getting longer pushrods for the Crower roller rockers, they were just a tad off center when we checked them and need about .050" longer pushrods to center things up......Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#12
09-02-2015, 03:54 PM
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sorry to hear about the prw rockers, always heard they were supposed to be decent quality.
i use h/s 1.5 on my roller cam stroker engine & i assume they are doing fine, my friend will be buying a set also for a current stroker we are doing.... anyone have or heard of any problems or issues with the harland sharps? |
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#13
09-02-2015, 04:02 PM
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I've been thinking about re-introducing the best rockers ever made for a Pontiac-the Norris AeroSteel rockers. Any interest?
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
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#14
09-02-2015, 04:03 PM
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CRANE
Quote:
Example: The only difference between the CRANE GOLD rockers and LUNATI BLUE rockers was the anodize color.
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color me gone |
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#15
09-02-2015, 04:14 PM
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I've used Crane Gold rockers numerous times, and Harland Sharps and zero issues with them.
We have two engines here with PRW's, and both of those engines are showing "toothpaste" on the oil pan drain plugs when we do service on them. I suspected the rockers were wearing out, as in recent months the engine has been getting louder up top, and I just ran the valves on it earlier this year. We inspected all 16 rockers after they were removed, and all are fine in the centers at the needle/bearings, and no visible wear at the pushrod cups. At least half of them are showing excessive play between the pins and roller tips. I spun a couple of them in the vise with a dial indicator and they are .007 to as high as .010" out of round. Being that I'm running a "hybrid" set up with tight lash, it's a good thing I got them out of there when I did. I doubt if a guy running a hydraulic cam would even know they were wearing out that bad on the tips, as the lifters would take up the slack as they continued to grind up.......Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#16
09-02-2015, 04:55 PM
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I've noticed some slight noise on the hybrid setup on the 474.........PRW stainless are going south.
Like I always say.......It only cost a little bit more to go 1st class. Should have heeded my own advise.....lol. Going with the Crowers. |
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#17
09-02-2015, 04:55 PM
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Good info on this thread. Well i had the same issue with my PRW 1.5s a few years back and now my 1.6s seem to have some wear. Im ticked because both sets have 2-3k ,not happy.
My drain plug had the same silver goop like you experienced Cliff. Guess i will be hunting down another set for the 3rd time....... |
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#18
09-02-2015, 04:55 PM
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NORRIS.......top notch hardware.
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#19
09-02-2015, 05:06 PM
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KEN,
Norris, the same as the cams? Tony
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my favorite place in the world a nice smelly garage 
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#20
09-02-2015, 05:20 PM
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It's interesting as we have only used two sets of PRW's here, and immediately after break-in when the valve lash was set (both are "hybrid" set-ups) we noticed that the roller tips had some run-out in them that was NOT present when we lashed the vlaves on the engine stand. As my engine continued to get more running time on it, I've noticed the valve train noise increasing and needing more frequent adjustments. It's still pretty darned quiet compared to any other type of set-up, hydraulic, flat or solid roller. Thought I'd pass it on here, since a lot of folks are using these rockers, and if you have a hydraulic cam set-up it will take up the increases in clearance and you may have no idea that the lifters are failing.......Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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