Go Back   LS1TECH > SBC-BBC-LT1-LT4 PERFORMANCE > LT1-LT4 Modifications
Sign in using an external account
Register Forgot Password?
Search

LT1-LT4 Modifications
1993-97 Gen II Small Block V8

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 08-17-2010, 09:59 AM   #1
11 Second Club
Garage is empty, add now
 
ElkySS's Avatar
 
Trader Rating: 4
Join Date: Oct 2007
Location: Houston Tx
Posts: 1,699
Default Comp Cams Ultra Pro Magnum rocker arm review

i recently broke a comp cams red aluminum rocker so i decided to upgrade to the ultra pro mags. it made a world of difference.

just by looking at it, u can tell its a stout design. the red rockers had pressed in bearing where as the ultras have a snap ring holding each bearing in.

when installed, they are the quietest rocker iv ever used. i cant hear any valve train noise. i am extremly impressed with these rockers.
ElkySS is offline   Reply With Quote
Old 08-17-2010, 10:27 AM   #2
TECH Veteran
Garage is empty, add now
 
wrd1972's Avatar
 
Trader Rating: 12
Join Date: Mar 2006
Location: Central Kentucky
Posts: 4,522
Default

I would NEVER trust an aluminum rocker for a performance app. I have the old Pro-mags and have never had an issue.
__________________
1995 Z28 Convertible, M6 355ci LT1 DYNO 394 RWHP/370 RWTQ SAE thru the 9" Truetrac
Performance Mods 6" rod Mahle pistons, LE2 heads w/ Patriot xtremes, 226/232 LE cam, LE ported intake, Midwest 9" w/4.11's, K&N CAI, BBK 58MM TB, LPP Long tube headers no cats, Pro mag 1.6 RR's, Tuned by BLUECAT.Pic top down. Pic top up. Pics of my True Dual exhaust.
wrd1972 is offline   Reply With Quote
Old 08-17-2010, 10:29 AM   #3
11 Second Club
Garage is empty, add now
 
ElkySS's Avatar
 
Trader Rating: 4
Join Date: Oct 2007
Location: Houston Tx
Posts: 1,699
Default

they came with the motor when i bought it. it didnt actually break, one of the pressed in bearings wiggled out and took the other one with it
ElkySS is offline   Reply With Quote
Old 08-17-2010, 10:55 AM   #4
Village Troll
Garage is empty, add now
 
SS RRR's Avatar
 
Trader Rating: 2
Join Date: Oct 2002
Location: VA
Posts: 7,185
Default

Quote:
Originally Posted by wrd1972 View Post
I would NEVER trust an aluminum rocker for a performance app. I have the old Pro-mags and have never had an issue.
Crane Gold Racing aluminum rockers here. They've been pressing on 250lbs of seat pressure and 500lbs with the valves open up to 7200rpm for the last 3 years. Is this a Bert law of ridiculousness that you've held on to.
__________________
1996 Chevrolet Camaro Z28 SS #597 M6
Quote:
Originally Posted by z28SSilvest View Post
You sir, are a genius with the mind of a 10 year old.
SS RRR is offline   Reply With Quote
Old 08-17-2010, 11:18 AM   #5
12 Second Club
Garage is empty, add now
 
fergymoto's Avatar
 
Trader Rating: 111
Join Date: Aug 2005
Location: Hermitage, PA
Posts: 2,786
Default

Quote:
Originally Posted by wrd1972 View Post
I would NEVER trust an aluminum rocker for a performance app. I have the old Pro-mags and have never had an issue.

Go into any performance machine shop and say this and they will laugh you out the door.
__________________
-2002 Firebird -. 4.12 at 175mph 1/8 mile. 765ci engine on 3 stages of nitrous
-1997 Trans Am WS6 M6- 10.80s N/A, 3,650lbs, 500+ mile road trips. Sold 3/2011
fergymoto is offline   Reply With Quote
Old 08-17-2010, 11:22 AM   #6
TECH Veteran
Garage is empty, add now
 
wrd1972's Avatar
 
Trader Rating: 12
Join Date: Mar 2006
Location: Central Kentucky
Posts: 4,522
Default

Quote:
Originally Posted by fergymoto View Post
Go into any performance machine shop and say this and they will laugh you out the door.
That might be true but I dont claim to be a professional or a know it all. I base the statement on I have seen several posts where bearings sliding out were the issue. But I have NEVER seen a problem with a Pro-mag. In all fairness they could have been cheap Chinese junk.

Just knowing what I know, I feel better with the Pro-mag knowing the chromeoly steel is stronger than aluminum..
__________________
1995 Z28 Convertible, M6 355ci LT1 DYNO 394 RWHP/370 RWTQ SAE thru the 9" Truetrac
Performance Mods 6" rod Mahle pistons, LE2 heads w/ Patriot xtremes, 226/232 LE cam, LE ported intake, Midwest 9" w/4.11's, K&N CAI, BBK 58MM TB, LPP Long tube headers no cats, Pro mag 1.6 RR's, Tuned by BLUECAT.Pic top down. Pic top up. Pics of my True Dual exhaust.

Last edited by wrd1972; 08-17-2010 at 11:27 AM..
wrd1972 is offline   Reply With Quote
Old 08-17-2010, 11:26 AM   #7
TECH Veteran
Garage is empty, add now
 
wrd1972's Avatar
 
Trader Rating: 12
Join Date: Mar 2006
Location: Central Kentucky
Posts: 4,522
Default

Quote:
Originally Posted by SS RRR View Post
Is this a Bert law of ridiculousness that you've held on to.
Not really. See my last post.

I would never trust an aluminum rocker in a performance app. Bad wording and I want to take that back. I will now leave the woodshed.
__________________
1995 Z28 Convertible, M6 355ci LT1 DYNO 394 RWHP/370 RWTQ SAE thru the 9" Truetrac
Performance Mods 6" rod Mahle pistons, LE2 heads w/ Patriot xtremes, 226/232 LE cam, LE ported intake, Midwest 9" w/4.11's, K&N CAI, BBK 58MM TB, LPP Long tube headers no cats, Pro mag 1.6 RR's, Tuned by BLUECAT.Pic top down. Pic top up. Pics of my True Dual exhaust.
wrd1972 is offline   Reply With Quote
Old 08-17-2010, 11:42 AM   #8
11 Second Club
Garage is empty, add now
 
ElkySS's Avatar
 
Trader Rating: 4
Join Date: Oct 2007
Location: Houston Tx
Posts: 1,699
Default

it is my understanding that aluminum rockers are more race oriented rather that daily driver friendly. i could be wrong but thats what i get from it
ElkySS is offline   Reply With Quote
Old 08-17-2010, 01:29 PM   #9
8 Second Club
Garage is empty, add now
 
fex77k's Avatar
 
Trader Rating: 2
Join Date: Sep 2006
Location: AR
Posts: 1,544
Default

Quote:
Originally Posted by ElkySS View Post
it is my understanding that aluminum rockers are more race oriented rather that daily driver friendly. i could be wrong but thats what i get from it
This may be true, but with all these knock off no name brands making "performance aluminum rockers" you really get what you pay for. There is nothing wrong with aluminum but I wouldn't buy the cheapest set I could find.
__________________
Mark, 396 Dart Pro1 Mechanical Alcohol injected LT1
http://www.ls1tech.com/forums/image.php?type=sigpic&userid=73134&dateline=127499  4121
If you can turn, you're not going fast enough.
fex77k is offline   Reply With Quote
Old 08-17-2010, 01:51 PM   #10
TECH Senior Member
Garage is empty, add now
 
RamAir95TA's Avatar
 
Trader Rating: 2
Join Date: May 2005
Location: South Jersey
Posts: 9,488
Send a message via AIM to RamAir95TA
Default

Been using Crane Golds for 6 years now, beating the snot out of them all along the way.
__________________
95 T/A AI 200cc stock castings, 383, Performabuilt 4L60E, Ford 9", Tuned by PCMforless 3340#,
10.81 @ 124.16, 1.43 60' Video of 10-second pass 455whp, 445tq - Dyno Vid

LT1 PARTS For Sale, MSD Opti, steam crossover tube, BMR swaybar, MAF, etc.
RamAir95TA is offline   Reply With Quote
Old 08-17-2010, 01:53 PM   #11
11 Second Club
Garage is empty, add now
 
AChotrod's Avatar
 
Trader Rating: 17
Join Date: Jul 2008
Location: Chicago area
Posts: 9,902
Default

Quote:
Originally Posted by wrd1972 View Post
But I have NEVER seen a problem with a Pro-mag.
I had a prob with CM pro mags.
Click the image to open in full size.
Click the image to open in full size.
I run Hi tech SS pro mags now.
__________________

96 Formula WS6#555 MODS=little of this a little of that
AChotrod is offline   Reply With Quote
Old 08-17-2010, 02:25 PM   #12
11 Second Club
Garage is empty, add now
 
ElkySS's Avatar
 
Trader Rating: 4
Join Date: Oct 2007
Location: Houston Tx
Posts: 1,699
Default

iv had pro mags on my last motor. these new ultra magnums seem much better. it kinda looks like comp is phasing out pro mags and replacing them with ultras. if u check jegs, they dont have a big selection of pro mags anymore but the selection of ultras is huge
ElkySS is offline   Reply With Quote
Old 08-17-2010, 03:22 PM   #13
TECH Senior Member
Garage is empty, add now
 
gregrob's Avatar
 
Trader Rating: 8
Join Date: Sep 2008
Location: 6,000+ feet
Posts: 5,109
Default

I have the Ultra Pro Mags. I love them and think they're an awesome rocker, BUT mine are not as quite as you say. They're not obnoxious by any means but you can hear them.
__________________
How much am I gonna spray?
All of it.
-02 QuickSilver Z06 SSP Prep Auto X and TT Mule


Subscribe to me on: YouTube

Powered By Haters
gregrob is offline   Reply With Quote
Old 08-17-2010, 03:57 PM   #14
11 Second Club
Garage is empty, add now
 
AChotrod's Avatar
 
Trader Rating: 17
Join Date: Jul 2008
Location: Chicago area
Posts: 9,902
Default

My Hi Tech SS pro mags are pretty damn quiet. The Ultras do look cool though!
__________________

96 Formula WS6#555 MODS=little of this a little of that
AChotrod is offline   Reply With Quote
Old 08-17-2010, 06:35 PM   #15
Launching!
1994 Chevrolet Camaro
 
ebeard's Avatar
 
Trader Rating: 0
Join Date: Dec 2008
Location: Lebanon TN
Posts: 235
Default

Does anyone know what part of a rockers design determines how loud it will be?
__________________
94 z28 - Sold
ebeard is offline   Reply With Quote
Old 08-17-2010, 07:13 PM   #16
TECH Resident
Garage is empty, add now
 
Trader Rating: 0
Join Date: Jun 2007
Location: centerville, ohio
Posts: 978
Default

Quote:
Originally Posted by wrd1972 View Post
I would NEVER trust an aluminum rocker for a performance app. I have the old Pro-mags and have never had an issue.
I have 2 sets of like new Promag's in the garage. Switched to Scorpion's 2 1/2 years ago.
__________________
1989 jaguar xjs '93 z/28 eng.& trans., asp pullies, csi, 26918's, 1.7 scorpion's, transgo, yank ss3600,3:54 gear, homemade shorties, dr.gas x, alvin's tune, 309 rwhp, 336 tq. 12.82 @ 104 1.74 60' 3900#
lt1-xjs is offline   Reply With Quote
Old 08-17-2010, 07:58 PM   #17
Launching!
Garage is empty, add now
 
spudnick3119's Avatar
 
Trader Rating: 0
Join Date: Mar 2007
Location: Allentown, PA
Posts: 263
Default

Quote:
Originally Posted by gregrob View Post
I have the Ultra Pro Mags. I love them and think they're an awesome rocker, BUT mine are not as quite as you say. They're not obnoxious by any means but you can hear them.
Same here, good rocker but they are noticeable at idle.
__________________

1995 Firehawk #58 M6 - MCRP Ported Heads, XFI 280 Cam, CC 1.6 Ultra Pro Mag RRs, eBay Headers, GMMG, KYB AGX Shocks, Eibach Prokit, 4.10's, 30# SVO Injectors, Tuned by Ion
spudnick3119 is offline   Reply With Quote
Old 08-17-2010, 08:55 PM   #18
TECH Enthusiast
Garage is empty, add now
 
Speedy's Avatar
 
Trader Rating: 0
Join Date: Jun 2002
Location: In the garage fixing LT1
Posts: 633
Default

I have a new set of pro mags. Can't hear a thing out of them. Very quiet. I bought them for longevity on a street/strip engine. I was afraid aluminum would suffer from metal fatigue over time and break. True or not, I prefer the peace of mind.
Speedy is offline   Reply With Quote
Old 08-17-2010, 09:58 PM   #19
11 Second Club
Garage is empty, add now
 
ElkySS's Avatar
 
Trader Rating: 4
Join Date: Oct 2007
Location: Houston Tx
Posts: 1,699
Default

well they seem dead quiet over the aluminum ones lol
__________________
1994 M6 Trans Am 396 LT4
1972 Pontiac Grandville
2010 Cobalt SS
ElkySS is offline   Reply With Quote
Old 08-18-2010, 10:29 AM   #20
TECH Fanatic
Garage is empty, add now
 
bowtienut's Avatar
 
Trader Rating: 0
Join Date: Mar 2007
Location: Bright, IN
Posts: 1,276
Default

A buddy of mine broke a Crane aluminum rocker just a week ago. The broken area showed horrible porosity.........the kind I would not expect to see even in a cheap Chinese casting! If you had that kind of porosity in a steel rocker, I'd expect it to fail eventually too. It just goes to show, there are quality escapes everywhere.......you just have to go where you feel your odds are best.
Running ProMags here.
__________________
1996 Impala SS
Stock shortblock, AI cam/heads
10.98 @ 122 on motor, 10.35 @ 128 on the 100-shot
2012 ISSCA Nationals SSuperPro Champion
2013 ISSCA Nationals SSuperNatural Champion
2013 ISSCA Nationals Roadrace RunnerUp
2014 ISSCA Nationals SSuperNatural RunnerUp
2014 ISSCA Nationals Autocross RunnerUp
bowtienut is offline   Reply With Quote
Old 08-18-2010, 10:29 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Penz Ultra + ZDDP = Noisy lifter? Iam Broke Gen 5 Camaro Power-Adder Tech 11 05-18-2014 09:17 PM
Valve cover clearance powercrazy LT1-LT4 Modifications 3 05-12-2013 07:05 PM
Comp Ultra Pro Mag Rockers gregrob Parts Classifieds 4 10-19-2011 01:16 PM
Comp cams Ultra pro mag roller rockers? 355TurboLT1 LT1-LT4 Modifications 0 01-03-2010 11:42 PM
Rocker arm weights Scorpion vs Comp. Come inside gregrob LT1-LT4 Modifications 5 06-09-2009 12:42 PM


Tags
16, aluminum, arm, bbc, cam, cams, comp, gold, installation, lt1, mag, magnum, mags, pro, rocker, rockers, ultra


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off




All times are GMT -5. The time now is 03:13 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details