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Duntov 30/30
CompCams is selling a hydraulic version of this cam. What made it so legendary? What engines were they originally installed in? What were its original characteristics?
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Re: Duntov 30/30
The Duntov (097) and 30-30 are actually two different camshafts.
There are a couple of really good threads over in one of the more recent NCRS Discussion Board archives that I'm not even going to try and compete with. If you're interested in these cams, take a look at what Duke Williams and John Hinckley posted at the NCRS site... Some really great info! Regards, |
Re: Duntov 30/30 (nunus79)
Back in the old old day's. Loud solid cams were the cruisers and wanna be racers dream. They were used in some of the first mass produced motors achiving 1 hp or better per cubic inch. Before aftermaket cam producers really got going to the general public. As a chevy owner you went down to the dealer for your hot parts.
IMO all those cams are just junk. Anybody that goes down and buys any stock cam or even a 350/350 hp cam for their hopup rebuild is not in touch with reality. They were produced before modern springs. So Chevy went with max duration on slow ramps and very little lift. If someone today told me that they had a 3/4 race cam I start looking for a "S" tatooed on their forhead for stupid! |
Re: Duntov 30/30 (gkull)
Back in the old old day's. Loud solid cams were the cruisers and wanna be racers dream. They were used in some of the first mass produced motors achiving 1 hp or better per cubic inch. Before aftermaket cam producers really got going to the general public. As a chevy owner you went down to the dealer for your hot parts. IMO all those cams are just junk. Anybody that goes down and buys any stock cam or even a 350/350 hp cam for their hopup rebuild is not in touch with reality. They were produced before modern springs. So Chevy went with max duration on slow ramps and very little lift. If someone today told me that they had a 3/4 race cam I start looking for a "S" tatooed on their forhead for stupid! That sounds a lot like the mystery cam I have in my 406 (long duration dual pattern with relatively low lift). Do know anywhere on the web that has GM part #'s for these cams as well as the cam specs for "historical" solid lifter camshafts? |
Re: Duntov 30/30 (nunus79)
OK. guys here's the scoop on the cam.. It came stock in 65-67 cars that were either 327/360hp or 375hp/f.i. They got the 30-30 nickname for the valve lash settings.... .030" on both intake and exhaust valves. Not a great cam for low end torque.. The "097" is a 283/270hp or 283hp. cam
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Re: Duntov 30/30 (silvervetteman)
The cam was design for racing in the mid 60's. It has a lot of duration/overlap with low lift. If was desinged to work with the valve springs and heads available at the time.
This is old technology and should never be used in car today unless you are building one to make an engine stock/original. Too much has been learned since then. The cam should sound good though. |
Re: Duntov 30/30
Rowdy Rat
I tried to find that post but was unsuccessful. I plan on trying it again w/different search. Thanks George "S" LOL Don't get ideas. I'm not planning on changing my 327/350 cam just yet :lol: :lol: :lol: :lol: :lol: Silvervetteman You answered most of my questions. Thanks DaveL82 CompCams seems to have updated that cam w/some decent lift. |
Re: Duntov 30/30 (nunus79)
The "30-30" was used in `64 -`65 365hp & 375hp 327's and in `67 - `69 Z28 302's. As already posted, it gave up some performance in order to have adequate idle vacuum for power brakes and FI and also to be gentler on the valve train. Cam and valve train technology has come a long way in the past 35 years and I don't know of any good reason to use anythng other than a new design if replacing a cam.
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Re: Duntov 30/30 (nunus79)
I believe the 30/30 cam came stock in the Z/28 302 it's a very nice cam that I can remember :D Sounded good too! I used to own one I also remember the adjustments on the valve lash being .030 intake/.030 exhaust :cool:
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Re: Duntov 30/30
Dave,
Try this one... http://www.ncrs.org/forum/archive7.cgi?read=20228 and http://www.ncrs.org/forum/archive6.cgi?read=9776 ...are just a couple that I found interesting. There are a few others that I uncovered during my search. Regardless of what camshaft you chose, I'd consider what Duke and John have to say on this topic... These guys have a lot of experience. Regards, |
Re: Duntov 30/30 (Rowdy Rat)
Installed my first 30/30 cam in 1968, WOW we thought it was great, but today go with the Extreme Engery cams from Comp. Ramp speed and lifts have all been engr'd for more performance and you will be happier.
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Re: Duntov 30/30 (nunus79)
Ran the 30-30 in my first Hot Rods. Ran it first w/ 283 then w/ 306 (302 built & bored), manual trans. & 4.56 posi. gears. Would take a GTO in less than a heartbeat (Chevy). LOL, the older guys started calling me OneFastKid.
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Re: Duntov 30/30 (Ganey)
I'll offer another opinion here. I agree with gkull on the quality and performance of modern cams and springs, especially some of the rollers out there, but for a mild, cheap street motor that will last forever and still sound good and perform well, 30/30's are OK by me. I've built a number of high-end HP engines, but I always make sure that the customer understands the life expectancy (short) and overhaul intervals (frequent) of these engines. If your looking for hydraulics, by all means go with a modern stick.
Hans |
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