A modern -097 Duntov cam.
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A modern -097 Duntov cam.
I would like to get a modern -097 Duntov cam.
The OEM -097 cam is a real hoot in a small engine so just want a modern eqiv. of it.
pdq67
The OEM -097 cam is a real hoot in a small engine so just want a modern eqiv. of it.
pdq67
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Re: A modern -097 Duntov cam.
What size small engine do you want to have a bigger hoot out of, as it matters in a huge way!
Any motor will respond better in a wider rpm range with better flowing heads , not so much in terms of bigger heads then just stuffing in a bigger Cam!
Any motor will respond better in a wider rpm range with better flowing heads , not so much in terms of bigger heads then just stuffing in a bigger Cam!
You can cut a man's tongue from his mouth, but that does not mean he’s a liar, it just shows that you fear the truth he might speak about you!
Re: A modern -097 Duntov cam.
Comp Cams solid flat tappet "hi torque" cam
#12-220-5 CS270s-8 270-270 235-235 (.050") .330"-.330"
.495"-.495" (1.5rr) 108 LSA .018"-.018" hot
You must degree it in and set the cam advance
EG: 108LSA 104/112 in/ex CL
Can use high ratio rockers with correct springs
Eg 1.65/1.6
#12-220-5 CS270s-8 270-270 235-235 (.050") .330"-.330"
.495"-.495" (1.5rr) 108 LSA .018"-.018" hot
You must degree it in and set the cam advance
EG: 108LSA 104/112 in/ex CL
Can use high ratio rockers with correct springs
Eg 1.65/1.6
Re: A modern -097 Duntov cam.
A few others same idea
Comp Cams Extreme solid flat tappet cams
#12-676-4 and #12-677-4 You can google these for specs.
All these cams will outperform the OEM 097 cam in your lil 325 cid sbc. These are all street solids.
Must use correct springs Must use a motor oil with zinc and a hair of moly in it for best cam- lifter life.
Again can play with rocker ratio for effect.
On all these you can play with the valve lash within reason for tuning effect
Comp Cams Extreme solid flat tappet cams
#12-676-4 and #12-677-4 You can google these for specs.
All these cams will outperform the OEM 097 cam in your lil 325 cid sbc. These are all street solids.
Must use correct springs Must use a motor oil with zinc and a hair of moly in it for best cam- lifter life.
Again can play with rocker ratio for effect.
On all these you can play with the valve lash within reason for tuning effect
Re: A modern -097 Duntov cam.
https://www.camcraftcams.com/ I believe he still grinds the original specs
Re: A modern -097 Duntov cam.
Agree, but it would be difficult to find a cam sold today which wouldn't. The '50-'60s SBC valve springs and rocker arms and pressed-in studs were such junk that the ramps had to be long and slow and the lift low if the valvetrain were to survive.
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering
Studebaker-Packard V8 Limited
Obsolete Engineering
Re: A modern -097 Duntov cam.
I don’t disagree with f bird here- but on a 325” deal (and knowing PDQ s preferences..) I would be inclined to go to 110 on the lobe sep. put a 282s (12-223-4) in with a 1.6 intake rocker installed about 108ICL and call it fun.F-BIRD'88 wrote: ↑Thu Jul 16, 2020 8:23 am Comp Cams solid flat tappet "hi torque" cam
#12-220-5 CS270s-8 270-270 235-235 (.050") .330"-.330"
.495"-.495" (1.5rr) 108 LSA .018"-.018" hot
You must degree it in and set the cam advance
EG: 108LSA 104/112 in/ex CL
Can use high ratio rockers with correct springs
Eg 1.65/1.6
Re: A modern -097 Duntov cam.
my opinion, small cubes, and you want to wind it up , and have a supercharger, and basically run an antique cam. it is not going to run how you imagine.
Re: A modern -097 Duntov cam.
I've run the cam f-bird recommends in a flat top 350 with double humps, 4speed ,373 gears.Liked it ran great. Wasn't the 097 ( We called it the 30-30 cam) ground on 114 c/l ? I remember it being a little smoother off idle, where as the comp cam was a little rough till about 2000rpm or so.
Re: A modern -097 Duntov cam.
RCJ wrote: ↑Thu Jul 16, 2020 4:45 pm I've run the cam f-bird recommends in a flat top 350 with double humps, 4speed ,373 gears.Liked it ran great. Wasn't the 097 ( We called it the 30-30 cam) ground on 114 c/l ? I remember it being a little smoother off idle, where as the comp cam was a little rough till about 2000rpm or so.
Two very different cams. The 097 or "Duntov" was the first generation SBC hi-po solid lifter cam. The 30-30 was the second generation and pretty much full-race for the day.
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering
Studebaker-Packard V8 Limited
Obsolete Engineering
Re: A modern -097 Duntov cam.
good choice. won w/ Charles' cams in circletrack as have/do many others.BlitzA64 wrote: ↑Thu Jul 16, 2020 10:58 am https://www.camcraftcams.com/ I believe he still grinds the original specs
nice folks to work with too.
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Re: A modern -097 Duntov cam.
That 097 profile ground onto an inline 6 cylinder Chevy, (230, 250 & 292), with their 1.75/1 rocker ratio works real well in quarter mile oval track 6 cylinder classes.
http://www.rmcompetition.com
Specialty engine building at its finest.
Specialty engine building at its finest.
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Re: A modern -097 Duntov cam.
The 097 and 346, (the 30-30), camshafts are totally different grinds ... Manley used to offer a cam they called "Thunderstick" which had 30-30 lobe profiles on 108 separation; ran very well in its day and didn't need much valve spring.RCJ wrote: ↑Thu Jul 16, 2020 4:45 pm I've run the cam f-bird recommends in a flat top 350 with double humps, 4speed ,373 gears.Liked it ran great. Wasn't the 097 ( We called it the 30-30 cam) ground on 114 c/l ? I remember it being a little smoother off idle, where as the comp cam was a little rough till about 2000rpm or so.
http://www.rmcompetition.com
Specialty engine building at its finest.
Specialty engine building at its finest.
Re: A modern -097 Duntov cam.
A few cam companys make a close copys of the 097. A buddy has a nice 56 chevy, he got tired of the 30 30 cam in a 283 + 060 he rebuilt with 1.94 heads. He poped in the Howards American Muscle Mechanical Flat Tappet Camshaft copy of the 097 with the howards DL lifters. He really like the lower RPM pull of the 097 over the 30 30 copy in the 56.
117492-10 CL117492-10 287 287 227 229 .395 .400 110 108 .012 .018
CL117492-10DL4 2200-5800 Near duplicate of the Chev 290HP/283, 360HP/327, cam (GM #3736097
117492-10 CL117492-10 287 287 227 229 .395 .400 110 108 .012 .018
CL117492-10DL4 2200-5800 Near duplicate of the Chev 290HP/283, 360HP/327, cam (GM #3736097