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03-14-2012, 04:37 PM
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#1
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Regular Member
Join Date: Aug 2009
Location: Tennessee
Posts: 44
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Installing 1.6 roller rocker arms
I will be installing Crane Gold 1.6 ratio 3/8" self-aligning roller rockers on my LT1. It has all stock internals and has 130,000 miles. Do I need to change the valve springs or studs?
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96 Camaro w/LT1, 4L60E rebuilt with 2500 stall, K&N CAI, Magnaflow catback, TPIS 52mm TB, 3.42 gears
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03-14-2012, 07:58 PM
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#2
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Regular Member
Join Date: Jun 2010
Location: chicagoland
Posts: 191
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I wouldn't install 1.6 rockers without changing the valve springs. Some people don't change the springs and they get away with it but I wouldn't do it. Your 130k valve springs are worn out anyways. Last year I installed some LT4 valve springs and picked up 1 mph at the track with no other changes. My old springs had 117k on them.
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1994 Trans Am, M6 hardtop, hotcam, SLP mids, S60 4.10
Last edited by guppymech; 03-14-2012 at 08:05 PM.
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03-14-2012, 08:27 PM
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#3
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Regular Member
Join Date: Aug 2006
Location: Little Rock, AR
Posts: 5,307
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Quote:
Originally Posted by guppymech
I wouldn't install 1.6 rockers without changing the valve springs. Some people don't change the springs and they get away with it but I wouldn't do it. Your 130k valve springs are worn out anyways. Last year I installed some LT4 valve springs and picked up 1 mph at the track with no other changes. My old springs had 117k on them.
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^x2
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03-14-2012, 10:57 PM
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#4
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Admin
Join Date: Mar 2008
Location: MD
Posts: 8,008
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Quote:
Originally Posted by shoebox
^x2
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X3
I'm starting to feel like a broken record, I believe this is the second time I agreed with you on the same subject today.
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Yep its slow.
Making the world a warmer place one gallon at a time.
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03-15-2012, 07:49 AM
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#5
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Regular Member
Join Date: Aug 2009
Location: Tennessee
Posts: 44
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follow-up
So factory LT4 springs should work fine, any other spring recomendations? No one commented on the studs, so are the stock ones ok to stay with?
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96 Camaro w/LT1, 4L60E rebuilt with 2500 stall, K&N CAI, Magnaflow catback, TPIS 52mm TB, 3.42 gears
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03-15-2012, 11:27 AM
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#6
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Admin
Join Date: Mar 2008
Location: MD
Posts: 8,008
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Stock studs are 3/8" so they are fine and the LT4 springs will work fine.
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Yep its slow.
Making the world a warmer place one gallon at a time.
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03-15-2012, 08:18 PM
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#7
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Regular Member
Join Date: Mar 2010
Posts: 128
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What are your goals for the project? If you plan on spinning over 6000 or plan on making horsepower swap out the 3/8 stud for 7/16. Run Non-self aligning rockers with hardened pushrods and guide plates.
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03-15-2012, 10:46 PM
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#8
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Regular Member
Join Date: Dec 2007
Location: The Fiesta City
Posts: 1,917
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Quote:
Originally Posted by Fox Slaughter
......If you plan on spinning over 6000 or plan on making horsepower swap out the 3/8 stud for 7/16. Run Non-self aligning rockers with hardened pushrods and guide plates.
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Overkill for a stock cam.
Still.....if you decide to go that route.....drop me a PM because I got all that  !
KW
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Black 1996 Impala SS, MTI 396ci, Ported AFR 210 Heads,
Competition Cam 236/242 Custom Grind
58mm TB, Clear Image 1 3/4" Quad-1 Headers with 3" Cut-outs, DynoMax 2.5" Cat-back
Yank 3600 stall TC, 4.10 gears
Bryan Herter tuning = 419 rwHP @ 6250 and 450 rwTQ @ 3750
SR 398ci in the works 
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03-16-2012, 04:06 PM
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#9
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Regular Member
Join Date: Aug 2009
Location: Tennessee
Posts: 44
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No cam in the near future. Probably just headers until its time to rebuild.
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96 Camaro w/LT1, 4L60E rebuilt with 2500 stall, K&N CAI, Magnaflow catback, TPIS 52mm TB, 3.42 gears
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03-18-2012, 11:23 AM
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#10
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Regular Member
Join Date: May 2011
Location: norfolk ny
Posts: 184
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I picked up over 50rwhp with a spring and rocker upgrade. My previous builder put cheap s.b.I springs in and i had majors valve train issues,12 broken damper springs to be exact lol. I went with the comp beehive springs and scorpion 1.6 s/a rockers. Kind of wish I had just bought a good n.s.a rocker and done guide plates cuz I like too rev my motors
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93 z28 a4. 10.8@125 1.55 60' 150 shot.
le3 heads,xfi280 cam,strange adjustable shocks, adj. T/a,adj lower control arms,subfc's,10 bolt with 4.10's,stock 700r4 with transgo2&3 kit,hughes 3000 stall,nitrodave plate kit and much more
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04-02-2012, 09:25 PM
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#11
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Regular Member
Join Date: Jul 2010
Posts: 932
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can someone tell me the part number for the lt4 valve springs? i dont know if theres any difference between the years and i dont want to buy the wrong ones. right now ive got the pn 12495494 ready to buy
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95 z28 a4, 3500lbs race weight, Moroso CAI, 1LE elbow, free mods, 1.6 nsa RR, 7/16 studs, guideplates, hardened pushrods, cutout after the cat. Current 1/4 mile:13.47 @ 102.56 mph Corrected time: 13.39 @ 103.65 mph Goal:12.5 with bolt-ons. 
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04-02-2012, 11:06 PM
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#12
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Regular Member
Join Date: Jul 2010
Location: New Mexico
Posts: 917
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__________________
93 Z28 T-tops T56 6spd 3.23 Gears,
Mostly Stock.
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04-02-2012, 11:07 PM
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#13
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Admin
Join Date: Mar 2008
Location: MD
Posts: 8,008
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That part # is fine, those are LT4 springs.
__________________
Yep its slow.
Making the world a warmer place one gallon at a time.
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04-04-2012, 09:38 PM
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#14
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Regular Member
Join Date: Apr 2011
Posts: 6
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I have a set that was run 2000 miles before a tear down for a 383 build. Won't fit in my iron heads. $80 shipped. All 16 with retainers and caps.
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04-04-2012, 10:52 PM
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#15
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Spelling Bee winnah!
Join Date: Sep 2008
Location: In a van under a bridge down by the river
Posts: 4,746
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Quote:
Originally Posted by dennis5374
I picked up over 50rwhp with a spring and rocker upgrade. My previous builder put cheap s.b.I springs in and i had majors valve train issues,12 broken damper springs to be exact lol. I went with the comp beehive springs and scorpion 1.6 s/a rockers. Kind of wish I had just bought a good n.s.a rocker and done guide plates cuz I like too rev my motors
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lol, god that sounds familiar. Same thing happened to me with dampers, destroyed my engine.
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