CP64365

Can you numbers experts tell me what was the correct cam for a '64 365HP. Is the part #3849346? And was this referred to as the Duntov 30-30? Thanks

MikeM

The 3849346 cam is correct for the 365 hp 327 engine and is generally referred to as the 30-30 cam.

The 3736097 released in 1957 for the 283 SHP engine up through the1963 SHP engine is generally called the "Duntov" cam. This same cam was released in 1956 for the 245 hp 265 engine under a different part number (I can't recall the number) and that's when the name "Duntov" was applied to it.

DZAUTO

Yep, that's the one.
This cam was also used in the 375hp/327s(FI) for 64-65, as well as the 67-69 302 Z/28 engines.
There are a few aftermarket cam grinders who are making repos of this profile.

Tom Parsons

65 Drivr

Here's one on E-bay.

http://cgi.ebay.com/NEW-SB-CHEVY-30-...3A1%7C294%3A50

Someone on this Forum mentioned the Predator 30-30 cam a while back and said he was very happy with it. I bought one myself a few weeks back for a 1965 365SHP I'm building for my 65 Vert.
If you do a search, I'm sure you'll find the thread.

lovevettes

Go to your home page and type in CompCams
When you get to Comp cams home page type in 30-30
First one is Hydraulic ---
Second one down is solid lifters.
Look and see if these cams match the original spec.

MikeM

I think that was AaronZ28.

I believe the Predator is a cheater version of the 30-30. I'd go with the stock profile from Federal-Mogul/Speed Pro and expect no problems with it.

JohnZ

The Federal-Mogul/Speed-Pro "30-30" blueprint cam is #CS-118R (cam only), or #KC-118R (kit, cam and lifters). Use stock valve springs (GM #3911068 or Federal-Mogul #VS-677).

Dan Hampton

If memory serves, the 265 cid hi-po cam was referred to as the "078" and was a different grind than the "098" cam.

I always liked the "098" better than the 30-30. It gave great mid range torque where the 30-30 really had to be spooled up to work.

MikeM

There were two solid lifter Corvette camshafts in '56. One was the 225 hp cam which was the same as the '55 195 hp camshaft. The other was the 245 hp camshaft which was the same as the 097 camshaft released in '57 except for a flat machined on the rear cam journal to oil the top end through the rear cam bearing.

CJS

Is there a "better" modern replacement cam for the Dutov 098? Better meaning equal or better torque and Hp and area under the curve etc.? ( for a bone stock 283/270hp)

Dan Hampton

If you don't mind a hydraulic, the 327/350 L79 cam is a great cam although I don't know the grind difference between it and the 098.

The L79 has 221 duration/447 lift/112 centerline

The 30-30 has 254 duration/484 lift/114 centerline.

Perhaps someone can chime in on the 098 grind characteristics. I believe the duration is about the same as the L79 but the L79 has more lift.

MikeM

I don't know much about aftermarket but I do know as long as you stick with a Chevy grind, you can run it tens of thosands of miles with no problems. The 097 cam is hard to beat for a street cam. Probably any low end power improvement would come at the expense of valve train wear/tear.

Your intake, exhaust and valve gear need to be designed as a system. Chevy did the homework for you, why not go with it?

CJS

About the Duntov 097 cam, I know lots of people run it a like it a lot. But Chevy didn't get it right on everything the first time. Like dual point distributors that were replaced by single point vacuum advance distributors by 1964. Or 2x4 carbs that were replaced by large single four bbls later on. and so on. Honestly I think the O97 cam was designed more for circle track racing than drag racing and street performance.
So that all makes me think that there may be a modern cam with less duration and overlap, but with more aggressive lobes, and with a little more lift that will yield the same top end 270hp but still maintain the 300 ft lb of torque down low instead of losing 15 ft.lbs. like the 097 does. I guess I am hoping someone else has been there and done that, and has found the perfect cam for a nostalgia street car.

MikeM

I am far from a cam expert but what you're asking for has little to do with "modern" and everything to do with wear and tear on the valve train. You can't have it both ways with a flat tappet cam but a roller cam will help.

If you're just interested in where the power comes on, there's probably plenty of cams that will do what you want.