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Small diameter roller cam springs
#2385702
10/11/17 04:24 PM
10/11/17 04:24 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
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OP
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Portage,michigan
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I have Harland Sharp rocker gear.
I have been told that anything above 1.50 diameter spring wont work with these rocker arms.
Was just curious( if i ever ran a roller wifh this HS setup) if anybody makes roller springs that are 1.50 or smaller OD
Just looked through the comp catalog and didnt see anything
Last edited by B3422W5; 10/11/17 04:31 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385705
10/11/17 04:30 PM
10/11/17 04:30 PM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
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master
Joined: Jan 2003
Posts: 8,028
Tulsa OK
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I ran a solid roller in my 360 with eddie heads and Erson rockers. I used the K-Motion K800 with a 1.46 OD spring. My cam was a 260@.050 and .640ish lift(or close to that). I changed the springs out yearly because I was doing drag week with them but I never had a problem. This 360 made 500ish hp in good air(11.16@119.5@ 3500lbs)
68 Barracuda Formula S 340
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385707
10/11/17 04:32 PM
10/11/17 04:32 PM
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Joined: Jun 2014
Posts: 5,183
Porter67
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Joined: Jun 2014
Posts: 5,183
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http://www.kmotion.biz/springdat.htm K motion has many that will work on a small roller. Comp also has some smaller dia springs for a mild street strip roller cam. But you have to look at there chart for outter and inner and mix and match, but K motion has always worked for me. A comp 977-16 with the next step up inner will run a comp .525 lift street roller.
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385710
10/11/17 04:37 PM
10/11/17 04:37 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
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OP
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Posts: 11,718
Portage,michigan
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That 800 spring is only 165, didnt see anything under 1.50 that would be 240-270 to run a fairly stout roller, around 1.800 ish installed height
The flat tappet i have now is around 140-145 itself.
If i went roller, have to be a sizeable upgrade over what i have
Last edited by B3422W5; 10/11/17 04:38 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: Porter67]
#2385718
10/11/17 04:51 PM
10/11/17 04:51 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
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OP
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Posts: 11,718
Portage,michigan
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Why not have your rockers machined like many do? I know its hard to send them off to get the heck cut out of them.
But then your cutting spring pockets too.
Have you considered a tool steel or schubeck like solid lifter, I run them on a steel core at .700 lift.
I use very light valvetrain parts and seem to be able to get by on alot lighter springs then many use.
Ive spun the comps and K motions to 74-7600 and things never skipped a beat for very short time periods, just 1/8.
Im sure if you looked into the higher end springs you can find ones that will work for a bigger roller. Thanks. Some good thoughts/ ideas. I have a couple other changes to make on the car, and going to a roller cam might not be needed if the other changes pick the car up enough. Probably would want to keep everything i currently have and just swap out cam and springs and retainers if i can get away with it. I will bounce it off Dwayne, he specced the springs i am running now
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: fbs63]
#2385724
10/11/17 04:58 PM
10/11/17 04:58 PM
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Joined: Jun 2014
Posts: 5,183
Porter67
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master
Joined: Jun 2014
Posts: 5,183
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Pac Spring makes alot of small od roller springs. Great parts but be prepared to pay. Thats it right there, I like the $150 springs not the 3-400 ones, but oddly I will use $800 lifters...
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Re: Small diameter roller cam springs
[Re: fbs63]
#2385728
10/11/17 05:00 PM
10/11/17 05:00 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 11,718
Portage,michigan
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Pac Spring makes alot of small od roller springs. Great parts but be prepared to pay. Using trick flows now. Think they are a budget PAC spring, and even they are nice
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385739
10/11/17 05:09 PM
10/11/17 05:09 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
OP
I Live Here
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OP
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Posts: 11,718
Portage,michigan
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If i dont hit what i am shooting for, another option might be swapping my 1.5 intakes for 1.6 intake rockers with the cam i have
Its 565/565 lift, so with a .377 lobe that would be 603 gross lift. Might make a bit more steam opening the valves that much more?
Edit.... looks like HS gets 43 each for the 1.6 intake rockers, so about 350 bucks
Last edited by B3422W5; 10/11/17 05:13 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: Porter67]
#2385745
10/11/17 05:21 PM
10/11/17 05:21 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
OP
I Live Here
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OP
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Posts: 11,718
Portage,michigan
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Here again if you just wanted to test and dont have any 1.6-s, ive a extra tested set of the china HS that are 1.6 that ive 60 flawless runs on id loan out. I buzz them to 7500 all the time and its ironic they have better geometry the the HS units do.
Thanks. Thats an offer i might end up taking you up on. My motor has never even seen 6500 rxcept for a couple of times in the water box not being careful
Last edited by B3422W5; 10/11/17 05:22 PM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385753
10/11/17 05:29 PM
10/11/17 05:29 PM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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I think you're going to have a hard time finding a stiff roller spring for that particular application.
Of course, how much pressure do you really want to use with 5/16" hold down hardware?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385979
10/11/17 11:40 PM
10/11/17 11:40 PM
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Joined: Jan 2003
Posts: 8,028
Tulsa OK
Bad340fish
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master
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Posts: 8,028
Tulsa OK
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I have a set of freshly rebuilt Comp 828-16 lifters I am going to be selling if you need them. I also have about 4 sets of K800s with about 2000-2500 miles on each set I will throw in with the lifters.
My moderate roller cam had no trouble going to 7000 with the K800s. They also help up well to hours on the highway at 3500-4000RPM.
68 Barracuda Formula S 340
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2385991
10/11/17 11:52 PM
10/11/17 11:52 PM
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Joined: Oct 2005
Posts: 8,880
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,880
Ontario, Canada
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I have been told that anything above 1.50 diameter spring wont work with these rocker arms. Maybe you shouldn't believe everything you're told. A stock big block spring is 1.55" diameter. Do you think HS would make a rocker that couldn't be used with a stock spring? I have HS rockers, 1.55" dia. springs and no issues at all with clearance. And yes, its a solid roller cam but that makes no difference.
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Re: Small diameter roller cam springs
[Re: Stanton]
#2385995
10/12/17 12:01 AM
10/12/17 12:01 AM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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I have been told that anything above 1.50 diameter spring wont work with these rocker arms. Maybe you shouldn't believe everything you're told. A stock big block spring is 1.55" diameter. Do you think HS would make a rocker that couldn't be used with a stock spring? I have HS rockers, 1.55" dia. springs and no issues at all with clearance. And yes, its a solid roller cam but that makes no difference. He's running a small block with rpm heads. That combo has pretty limited space between the rocker and the spring, and HS rockers rub 1.55 springs on those heads. It's right on the HS website, 1.50 max spring diameter. Oh, and I'm pretty sure OE BB springs are slightly under 1.500(1.48-1.49 IIRC) not 1.550.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2386177
10/12/17 10:51 AM
10/12/17 10:51 AM
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Joined: Oct 2005
Posts: 8,880
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,880
Ontario, Canada
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I have been told that anything above 1.50 diameter spring wont work with these rocker arms.
Maybe you shouldn't believe everything you're told. A stock big block spring is 1.55" diameter. Do you think HS would make a rocker that couldn't be used with a stock spring? I have HS rockers, 1.55" dia. springs and no issues at all with clearance. And yes, its a solid roller cam but that makes no difference.
He's running a small block with rpm heads. That combo has pretty limited space between the rocker and the spring, and HS rockers rub 1.55 springs on those heads. It's right on the HS website, 1.50 max spring diameter. Oh, and I'm pretty sure OE BB springs are slightly under 1.500(1.48-1.49 IIRC) not 1.550. After posting it occurred to me that he probably had a small block. I thought I had deleted my post but obviously not.
Last edited by Stanton; 10/12/17 10:53 AM.
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2386290
10/12/17 02:26 PM
10/12/17 02:26 PM
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Joined: Jan 2003
Posts: 5,894
Florida
Locomotion
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master
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Florida
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See if any of the stiffer beehive springs from Comp Cams or PAC fit the required specs. As with all springs, check pressures periodically.
I don't like cutting rockers for clearance because I've seen too many break there.
Last edited by Locomotion; 10/12/17 02:29 PM.
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2386314
10/12/17 02:59 PM
10/12/17 02:59 PM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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With that particular head/rocker combo, rather than trying to reinvent the wheel, I just use cam lobes that will work with springs that fit those heads & rockers.
From what I understand, the T&D's will clear the 1.55 springs.
With a little spring pocket cutting and tall retainers, you can get 1.900 installed height....... So, that combined with the T&D's opens up the spring selection quite a bit.
However, you're still dealing with 5/16" hold down hardware.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Small diameter roller cam springs
[Re: B3422W5]
#2386319
10/12/17 03:05 PM
10/12/17 03:05 PM
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Joined: Aug 2003
Posts: 43,219
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,219
Bend,OR USA
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I have used either Comp or PAC for a blown SB Chevy years ago that where 1.440 O.D., I don't remember the exact installed and open pressures but I'm sure they where above 225 Lbs. on the seats and over 500 lb. opened  I think they where dual spring with a dampener.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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