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Old 07-30-2010, 03:39 PM   #1
Del Clark
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Default performance of a Duntov 30/30 camshaft

I am building a 327 for my 55 chevy and I wanna run a Duntov 30/30 camshaft. I see the lift is .455 and the duration is .253 at .50 with a 114 degree lobe center... Has anyone run this cam on the street? Can someone give me some info on how it performs? I am running a Muncie 4 speed and a 3.55 rear. I would think with the duration that it wouldnt start howling till the rpms got up with with the lobe center at 114 I would think that would help. Thanks much.
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Old 07-30-2010, 03:46 PM   #2
shemp
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Default Re: performance of a Duntov 30/30 camshaft

I've used these cams (097) in various 283-292-301 combinations. You may need a little more gear. 3:70 to 4:11. I would use the small chamber 461 heads on your 327. Get a set of the Z/28 valve springs too. It has a really Boss idle. You'll like it.
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Old 07-30-2010, 03:49 PM   #3
HEATHEN
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Default Re: performance of a Duntov 30/30 camshaft

Before this gets any further, the "097" camshaft that is commonly known as a "Duntov" was used in hipo sbcs from 1957-63, and is NOT the same as the "30-30" cam that replaced it, and was used from 1964-69. The "30-30" definitely has a soggier bottom end than the "097", and needs lots of gear and, preferrably, a four speed. Put it in a heavy car with an automatic, and VW bugs will beat you off the line.
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Old 07-30-2010, 03:51 PM   #4
Ole don
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Default Re: performance of a Duntov 30/30 camshaft

Everything has to work together. If you want that cam, you will need some compression, good heads with big valves, good valve springs, a good intake and the proper size carb for the cubic inch size, and a free flowing exhaust. Think about a T500 five speed, low should be just a little lower, and five will be for Interstate cruising.
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Old 07-30-2010, 03:59 PM   #5
Atwater Mike
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Default Re: performance of a Duntov 30/30 camshaft

Heathen & Ole Don hit it on the head.
My Dad gave me a N.O.S. Duntov 30/30 for my '69 'Vette 350 mill in '72, (eng. had 17k miles) and I put it in my '55 F100, aluminum powerglide trans, 3.90 Dana rear.
Installed an Edelbrock performer intake, Carter Thermoquad, and tube headers with 2.5" headpipes and 40" glasspacks.
Initial performance was below expectations, but after a few miles (and a coupla beers) I revved it up to 3500 RPM in low range, drove deep into a corner, and pitched it sideways and it pulled thru the turn like a sprint car.
700 RPM idle speed, anywhere off-idle and it accelerated like a sick 283. Get it up past 2500 and it got 'anxious', then in the 3K range it got into "Hang on" mode.
Fun at RPM, but it was my shop truck. The 350 wasn't a 'comfortable screamer' like a 327, but it definitely had 'presence'...
I replaced it with a Cal Cams RV grind my pal Chico ground for me, with 112 degree lobe centers. Much more useable, Bonneville round trips in mid-'80s, Old Time Drags at Baylands, and even a time slip at 13.70 at 109 MPH, with mufflers and street tires! (350 turbo tranny & 3.70s)
(Same strip, uncorked with 30/30 cam previously made 14.20s at 100 MPH.)
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Old 07-30-2010, 04:00 PM   #6
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Default Re: performance of a Duntov 30/30 camshaft

The previous post are all correct. I would like to add that this cam does like a little more compression than what would come in a crate motor and it works best with a 4Spd transmisson and a single plane intake manifold. I also agree with the person that mentioned you will like the idle.
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Old 07-30-2010, 04:00 PM   #7
Del Clark
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Default Re: performance of a Duntov 30/30 camshaft

Im running flat tops...going to deck the block so the pistons are 0.00 in the hole and probably plane the heads...2.02 valves on the 461 heads...I am running old fenton black widow headers and i am running an old OFFY single 4 barrel and a 600 Holley.
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Old 07-30-2010, 04:06 PM   #8
Larry T
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Default Re: performance of a Duntov 30/30 camshaft

Quote:
Originally Posted by Ole don View Post
Everything has to work together. If you want that cam, you will need some compression, good heads with big valves, good valve springs, a good intake and the proper size carb for the cubic inch size, and a free flowing exhaust. Think about a T500 five speed, low should be just a little lower, and five will be for Interstate cruising.
I'll agree with Don, everything in the engine has to be set up to work together. Back in the 60's, all of the performance engines that came from Chevrolet with solid lifter cams had at least 11/1 compression. It's hard to get gas with enough octane to run one with that much compression on the street now. For the best performance and the sound you want, the best thing you can do is call one of the aftermarket cam manufacturers and get their recommendations.

One other point. A good running 327 in a street driven 55 would probably be a 15 or 16 second car. 11 second et's weren't as easy to come by as everyone seems to remember.
"The older I get, the faster I was"
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Old 07-30-2010, 04:08 PM   #9
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Default Re: performance of a Duntov 30/30 camshaft

Mine had a C4B, with a 3310 Holley, but was running 4:88's. I used it for commuting to work on 101 for a while. Lots of fun.
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Old 07-30-2010, 04:15 PM   #10
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Default Re: performance of a Duntov 30/30 camshaft

Quote:
Originally Posted by HEATHEN View Post
Before this gets any further, the "097" camshaft that is commonly known as a "Duntov" was used in hipo sbcs from 1957-63, and is NOT the same as the "30-30" cam that replaced it, and was used from 1964-69. The "30-30" definitely has a soggier bottom end than the "097", and needs lots of gear and, preferrably, a four speed. Put it in a heavy car with an automatic, and VW bugs will beat you off the line.
I would watch how you use that term "VW"

Ive spanked a camero (350) and a El Camino (396) with my VW in a street race and all I have is a healthy 1776 cc motor that put out around 100hp. There are a hand full of VWs out there that regularly run 11's in full street trim and interior. So be ware!!
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Old 07-30-2010, 04:38 PM   #11
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Default Re: performance of a Duntov 30/30 camshaft

We like to call the 30/30 "The Ralph Kramden Cam --- To The Moon Alice" !!! >>>>.
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Old 07-30-2010, 04:39 PM   #12
man-a-fre
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Default Re: performance of a Duntov 30/30 camshaft

Man,look at the comp cams extreme 4x4 or lunati voodoo cams for torque you'll be happy you did.
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Old 07-30-2010, 04:42 PM   #13
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Default Re: performance of a Duntov 30/30 camshaft

Quote:
Originally Posted by Del Clark View Post
I am building a 327 for my 55 chevy and I wanna run a Duntov 30/30 camshaft. I see the lift is .455 and the duration is .253 at .50 with a 114 degree lobe center... Has anyone run this cam on the street? Can someone give me some info on how it performs? I am running a Muncie 4 speed and a 3.55 rear. I would think with the duration that it wouldnt start howling till the rpms got up with with the lobe center at 114 I would think that would help. Thanks much.
They work fine on the street. A mild lope and good wide powerband.

Only down side I see with them is they are a splid lifter cam and you need to adjust valve lash once in a while. Well that and they are a little noisey because they are a solid lifter cam. As if that's a down side on a hot rod.

They were a street cam from the factory.
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Old 07-30-2010, 04:47 PM   #14
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Default Re: performance of a Duntov 30/30 camshaft

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Originally Posted by Engine Pro 5X View Post
We like to call the 30/30 "The Ralph Kramden Cam --- To The Moon Alice" !!! >>>>.
Damn, thats funny!

Unless your hooked on the solid lift, you might consider the L79 hyd cam. Thats if ya want to stick to a vintage GM grind VS the latest and greatest technology. More versatile and street friendly, but still a nice hot rod idle.
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Old 07-30-2010, 05:50 PM   #15
powdercoater46
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Default Re: performance of a Duntov 30/30 camshaft

I recall this to be the cam the 365 and 375HP Corvettes used. Lots of valve train noise cause they were supposed to be set at .030 on both the intakes and exhaust; set on a hot engine. I think the 097 Duntov cam had .012 intake lash and .018 on the exhaust. Everyone is right; a little slow off the line.
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Old 07-30-2010, 06:32 PM   #16
Deuce Roadster
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Default Re: performance of a Duntov 30/30 camshaft

I suggest calling the CAMSHAFT manufactuer of your choice and tell them what your combination is. Tell them how much you car weighs and the rear gear and the rear tire diameter.

Then, let them tell you which camshaft is BEST ...

They will taylor one for one ... instead of a generic 30/30 that is now 40 years old ... technlogy wise.

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Old 07-30-2010, 06:36 PM   #17
wingnutz
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Default Re: performance of a Duntov 30/30 camshaft

Before I read any further.... You Need more Gear like you Gotta have more Cow Bell!!!

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Old 07-30-2010, 06:51 PM   #18
Deuces
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Default Re: performance of a Duntov 30/30 camshaft

Gotta have more cow bell!! Santana music anyone???
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Old 07-30-2010, 06:56 PM   #19
Deuces
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Default Re: performance of a Duntov 30/30 camshaft

The .030"-.030" cam was also used on the '67-'69 chevy 302 motors.. I think a 5-speed trans with a 3.35 first gear ratio would wake up the low end compared to the 2.20 first gear from the Muncie 4-speed...
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Old 07-30-2010, 07:02 PM   #20
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Default Re: performance of a Duntov 30/30 camshaft

I have never run or heard one run but Comp cams makes a Nostalgia plus cam part number N+30-30H that is an hydraulic cam that is supposed to out perform the old 30-30 and still have the wicked exhaust note.

D Smith
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