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Re: Crane rocker carnage pic. Need rocker recommendations [Re: MR_P_BODY] #1101191
10/25/11 12:25 PM
10/25/11 12:25 PM
Joined: Jan 2009
Posts: 1,044
Victoria, Australia
Ian Offline
super stock
Ian  Offline
super stock

Joined: Jan 2009
Posts: 1,044
Victoria, Australia
Quote:

Quote:

t&d.$$$, but worth it. stay safe, seeya.




thats all I run now... would be the last
set of rockers you would buy




the best money i have spent ,t&d all the way


1.37 60 ft [email]6.0@113[/email] [email]9.57@141[/email] 408 glide 3550lbs
new video http://www.youtube.com/watch?feature=player_embedded&v=Xvq3ZObywQE
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Ian] #1101192
10/25/11 04:41 PM
10/25/11 04:41 PM
Joined: Jan 2003
Posts: 1,607
westerly, ri. usa
4
440lebaron Offline
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440lebaron  Offline
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Joined: Jan 2003
Posts: 1,607
westerly, ri. usa
Hello,
t&d's will also break, .650 lift roller 600 lbs spring, have broken 3-4 in 250 runs, they do have a life cycle as t&d says. just broke 1 intake at lvd this past weekend. car has been sitting since may without backing off rockers??

gary


all parts are sold as is, all parts are considered used no warranties or returns
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Re: Crane rocker carnage pic. Need rocker recommendations [Re: '72CudaRacer] #1101193
10/25/11 05:41 PM
10/25/11 05:41 PM
Joined: Mar 2009
Posts: 1,058
bigfork mn
D
dragram440 Offline
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Joined: Mar 2009
Posts: 1,058
bigfork mn
Quote:

I have the blue Mopar Performance ones that are made by Crane. I broke one this season at just under 7000 RPM's in the lights on 1/4 mile. Mine broke at the same spot, looks identical to yours. I replaced mine with a spare on, and replaced the mangled up push rod, so far so good.

Brian Dunnigan



I am running these same blue mopar performance rockers with a solid roller cam. I hope mine dont do that. Or should I be expecting it?


67' charger 499 RB 10.57 at 127
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Thumperdart] #1101194
10/25/11 09:45 PM
10/25/11 09:45 PM
Joined: Jan 2003
Posts: 16,928
NC
440Jim Offline
I Live Here
440Jim  Offline
I Live Here

Joined: Jan 2003
Posts: 16,928
NC
Quote:

Quote:

ThumperDart
Exactly, I don`t think the Cranes or Comps were designed for those pressures and that`s why I went to Harlands.............



440lebaron:
Hello,
t&d's will also break, .650 lift roller 600 lbs spring, have broken 3-4 in 250 runs, they do have a life cycle as t&d says. just broke 1 intake at lvd this past weekend. car has been sitting since may without backing off rockers??

gary



This is disappointing. The original poster is only running 550 lbs open pressure (his estimate) and the rockers are breaking. There has to be more to it!
-number of runs
-valve float or surge
-etc. or something

Now I agree Harland Sharp or T&D are better, but at 550 lbs open that is disappointing.
And the T&D post is disappointing at 600 lbs open. These are not high pressures, IMO. But I do agree that aluminum doesn't last forever. But I know a bunch of bracket racers that put 300 passes on their cars every season; and they don't buy rockers every year.

Maybe I should just stick to the flat tappet cams and 400ish open pressure... Even the Indy rockers hold up to that ! LOL

What's Up with this????


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: Crane rocker carnage pic. Need rocker recommendations [Re: dragram440] #1101195
10/25/11 09:51 PM
10/25/11 09:51 PM
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Guitar Jones Offline
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
G

Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Quote:

Quote:

I have the blue Mopar Performance ones that are made by Crane. I broke one this season at just under 7000 RPM's in the lights on 1/4 mile. Mine broke at the same spot, looks identical to yours. I replaced mine with a spare on, and replaced the mangled up push rod, so far so good.

Brian Dunnigan



I am running these same blue mopar performance rockers with a solid roller cam. I hope mine dont do that. Or should I be expecting it?




I have both the Crane Golds and the Mopar blues and they are not the same.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Charger453] #1101196
10/30/11 11:08 AM
10/30/11 11:08 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Harland sharp break too. Not sure but kicked a rod a t same time pulling motor to see if rod caused rocker or exhaust rocker breaking at 7600 caused rod??

6894883-Harlandsharp2.JPG (108 downloads)
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Dodgem] #1101197
10/30/11 11:09 AM
10/30/11 11:09 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
another

6894885-Harlandsharp1.JPG (102 downloads)
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Dodgem] #1101198
10/30/11 11:55 AM
10/30/11 11:55 AM
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines Offline
master
CompWedgeEngines  Offline
master

Joined: Nov 2004
Posts: 3,544
Syracuse,NY
I'd be willing to bet you know already why this happened. Rocker breaking, causing a rod to break? Or rod breaking, casuing a rocker to break...hmmmm..decisions...decisions....I know where I would put my money....

How bad is the rest of the damage?


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Dodgem] #1101199
10/30/11 12:01 PM
10/30/11 12:01 PM
Joined: Jun 2004
Posts: 6,780
Alabama
Mopar-Al Offline
master
Mopar-Al  Offline
master

Joined: Jun 2004
Posts: 6,780
Alabama
This thread is making me nervous now. I have 230 closed 685 open on my springs. crane golds at 1.5 ratio. low .700 lift on eddy rpm heads. I planned on changing the complete top end by summer, but may end up doing it sooner.

Re: Crane rocker carnage pic. Need rocker recommendations [Re: Mopar-Al] #1101200
10/30/11 12:31 PM
10/30/11 12:31 PM
Joined: Mar 2005
Posts: 867
Bellevue, NE
C
Charger453 Offline OP
super stock
Charger453  Offline OP
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Joined: Mar 2005
Posts: 867
Bellevue, NE
Quote:

This thread is making me nervous now. I have 230 closed 685 open on my springs. crane golds at 1.5 ratio. low .700 lift on eddy rpm heads. I planned on changing the complete top end by summer, but may end up doing it sooner.




I planned on waiting until next spring since the season is almost over, but Todd (Competitionwedge) gave me a sweet price so I'm getting them now. I may do a little street driving if the weather stays nice. My local track is done after today, but KCIR runs thru November according to their site, so I might try to run down there sometime. I was nervous about the Cranes and had one break. I'm not waiting any longer.

Re: Crane rocker carnage pic. Need rocker recommendations [Re: CompWedgeEngines] #1101201
10/30/11 12:34 PM
10/30/11 12:34 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Just pulling the motor this afternoon maybe finishing later in the week!

Re: Crane rocker carnage pic. Need rocker recommendations [Re: CompWedgeEngines] #1101202
10/30/11 01:13 PM
10/30/11 01:13 PM
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
P
Performance Only Offline
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Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
Quote:

I'd be willing to bet you know already why this happened. Rocker breaking, causing a rod to break? Or rod breaking, casuing a rocker to break...hmmmm..decisions...decisions....I know where I would put my money....

How bad is the rest of the damage?




when a rod breaks and the piston goes slamming into the valves, it's a sure bet that something in the top end is going to take one heck of a hit.
we use Harland Sharps on combo's with over 875lb springs and i've never broken one. IMO they're every bit as strong as the T&D's. the only thing better would be the individual shaft Jesel set-up.


machine shop owner and engine builder
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Performance Only] #1101203
10/31/11 02:27 PM
10/31/11 02:27 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Yea I fear the piston whacked the valves still working on getting it out? Or should be! :-)

Re: Crane rocker carnage pic. Need rocker recommendations [Re: Scott58] #1101204
11/04/11 01:08 AM
11/04/11 01:08 AM
Joined: Nov 2005
Posts: 808
mckinney texas
S
shoebox Offline
super stock
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super stock
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Joined: Nov 2005
Posts: 808
mckinney texas
Quote:

RAS makes a very strong rocker in stainless, good if you do a lot of street use. Very expensive, though.





That would be fine if you could call these people and someone
Would answer the phone! They don't return calls or emails. I don't think
Anyone can get these rockers anymore! Lol. I'm sore with these folks..
Does it show? Maybe I'll get my rockers back someday.


74 dart sport 440 www.Csucarbs.com
Re: Crane rocker carnage pic. Need rocker recommendations [Re: Guitar Jones] #1101205
11/04/11 02:24 PM
11/04/11 02:24 PM
Joined: Jan 2007
Posts: 3,695
nc
E
emarine01 Offline
master
emarine01  Offline
master
E

Joined: Jan 2007
Posts: 3,695
nc
Quote:

Quote:

Quote:

I have the blue Mopar Performance ones that are made by Crane. I broke one this season at just under 7000 RPM's in the lights on 1/4 mile. Mine broke at the same spot, looks identical to yours. I replaced mine with a spare on, and replaced the mangled up push rod, so far so good.

Brian Dunnigan



I am running these same blue mopar performance rockers with a solid roller cam. I hope mine dont do that. Or should I be expecting it?




I have both the Crane Golds and the Mopar blues and they are not the same.


Alrighty then... which one is better....

Re: Crane rocker carnage pic. Need rocker recommendations [Re: Charger453] #1101206
11/04/11 03:12 PM
11/04/11 03:12 PM
Joined: Oct 2010
Posts: 2,408
Ambridge, Pa.
R
rickraw Online content
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rickraw  Online Content
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Joined: Oct 2010
Posts: 2,408
Ambridge, Pa.
reading all the feedback from everyone on here tells me all rockers fail at some point in time. eariler i said have t&d's. i have 625# open. one thing i do when my ride sits for the winter, i loosen the rockers. maybe this helps rocker life??? stay safe, seeya.

Re: Crane rocker carnage pic. Need rocker recommendations [Re: rickraw] #1101207
11/04/11 05:07 PM
11/04/11 05:07 PM
Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
poppaj Offline
mopar
poppaj  Offline
mopar

Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
I feel that a 620 lift or less flat tappet is the limit for Cranes and hughes. 700 is the limit for harland sharps. Anything bigger needs paired jessel or T&D... Flimsey cheap pushrods will also cause problems. Overkill is the safe way to go when you are building a valve train. poppaj

6903621-IMG_1807.jpg (24 downloads)

AA/NSS 65'Coronet "Whompin Wedge"
Pop & Son Performance 557" B-1 power
John Holt Chassis
Re: Crane rocker carnage pic. Need rocker recommendations [Re: poppaj] #1101208
11/04/11 11:10 PM
11/04/11 11:10 PM
Joined: Aug 2008
Posts: 4,071
Mo.
racerx Offline
master
racerx  Offline
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Joined: Aug 2008
Posts: 4,071
Mo.
Quote:

I feel that a 620 lift or less flat tappet is the limit for Cranes and hughes. 700 is the limit for harland sharps. Anything bigger needs paired jessel or T&D... Flimsey cheap pushrods will also cause problems. Overkill is the safe way to go when you are building a valve train. poppaj


Harland sharps r rated up to 900" lift ive just upgraded to a set of Smith Brothers 120 wall/3/8 push rods at the end of the season hoping to eliminate some of the flex in the drive train

Re: Crane rocker carnage pic. Need rocker recommendations [Re: racerx] #1101209
11/06/11 11:43 AM
11/06/11 11:43 AM
Joined: Jun 2009
Posts: 877
ky
68roadrunner Offline
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68roadrunner  Offline
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Posts: 877
ky
i have broke 3 harland sharps this year for no apparent reason. these are only a season and a half old and they were off the engine over the winter.

i had the kmotion 950 springs set up properly giving me like 720 open. so i switched to a pac giving me 790 open. to see what this would do.

still broke a rocker after the spring change.

so are the rockers weak from previous harmonics or still have a problem

guess new pushrods next. have s.b. 3/8 120 wall now

Re: Crane rocker carnage pic. Need rocker recommendations [Re: 68roadrunner] #1101210
11/06/11 11:54 AM
11/06/11 11:54 AM
Joined: Aug 2008
Posts: 4,071
Mo.
racerx Offline
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racerx  Offline
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Posts: 4,071
Mo.
If u r asking me.I have no ideal maybe it's inferior metals r something maybe one of the rocker experts will chime in and answer the?..........

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