I currently run this old cam in a 383 that has run a best of 9.86 at 137mph at 3100lbs.

Has anyone tried a different cam in a similar combination and found big gains?

I have heard many say this old cam is a dinosaur but I think it works pretty well.


Hutch

9.86 @ 137mph at 3.1klbs with a 383 is more than "pretty well." Don't touch it!

Yeah what else is done to that 383?

Let leaping dogs glide.
Leave it alone.
I'm lighter than you. Sell me that motor as is. LOL.

You're flying with old news and much salutes.

I’m going to guess...ALOT.

Yeah, that would have to be pretty stout.

If you have enough valvespring then put a 1.6 rocker on the intake. Wallace shows you're only making 615 HP now so with a 'good' stage6 (340cfm) head you could make 650-675 still using a flat tappet and using respective parts/combo. Conversely, I don't see it being worth your while to mess with a cam that hasn't wiped the lobes and is running respectable given what I know/assume about the motor.

Sounds like the dinosaur cam is working well in that 383! Curious to know the rest of the combo... I'm guessing the right roller cam would pick up power, if that's what you're after.

Thanks for the reply guys. It's an 11:1 383. 060" over. 1st design stage 6 straight plug hand ported heads 2.14 1.81 valves with a 7.100 rod.
It does work well but of course every time I get asked about it I always hear about how old the cam design is.

I'm building a 406cid twin to this now and I have another dinosaur going in. Lol


Hutch

Old age and treachery always overcomes youth and enthusiasm. Lol.

A camshaft by definition is "old" technology. Lots of "new" cams not running 137 mph at 3100 lbs with a 383.

Kevin

I'm a little surprised that the 590 cam works that well with the Stage VI heads but evidently those two are happy with each other in your engine. It can be hard to improve on a combo that is working well. I've spent a bunch of time (and money) on the dyno testing the latest trick cam only to find nothing or go backwards.

I have a .590 in a 440 @ 3,000lbs,Stage 6 heads,6bbl intake ,93 gas.
have run 136mph in Ohio.

not as fast as your 383 ,,,,,STOUT combo!!
Good tuning skills.

According to my no's your making 648fwhp@3100lbs
60 Foot E.T. : 1.36
1/8 Mile E.T. : 6.19
1/8 Mile Trap Speed : 109.76
1/4 Mile E.T. : 9.81
1/4 Mile Trap Speed : 137

Thats some HP with that spec motor.

My mates 12.5:1 440 Dart with 317cfm Eddy's and the .590 cam only managed 132mph and 10 teens best@3150lbs and thats@sea level@SPR raceway...that was 600hp.

What is the compression height of a low-deck 383 with a 7.10" rod? That's a 2+ rod ratio, which is uncommonly high. (We're still talking a 3.375" stroke, right?)

Got flow #s for the heads? And are they standard port or MW?

What's the induction system?

What sort of RPM are you spinning it?

Auto or stick? How much stall, if auto?

Regardless, it hauls a$$ for what it is.

if automatic, what converter and rear gear ?

It's an oddball combo for sure. Pistons were custom made in 1972. They are. 927 pin,. 200 dome,. 043. 043 3/16 inboard locks with a tiny skirt. Head intake ports are matched to the. 060" intake gaskets that used to come with a belly pan. I had a collection of them so it seemed like a good fit. Exhaust ports were raised in a D port design and I made custom header flanges to fit. CH of the piston is 1.195 from memory and crank is 3.365" and still Chrysler diameter. There were no rockers for these stupid heads so I used crane golds with Jesel Buick adjusters and Chevrolet push rods. I shift this between 7500 and 8000, the converter is an 8" I made that goes about 6400 on the hit. Intake is a Victor with a 2" velocity spacer and an old carb shop 930 with an air cleaner and the car has header mufflers.

It sounds like it runs pretty good now. My cam is a custom grind from Dwayne Porter in my street car and it sorta close to the MP .590 but its ground for my combo. Which my 63 weighs over 3700 lbs and I run a full exh but its specs are 264 & 270 @ .050 with .585 & .592 lift with a 110 LSA. I have it in the eng on a 106 ICL. But your cars runs pretty well now. Ron

It would be nice to see some back to back track testing with some of the newer cams if anyone has done it.

Mr Hutch,
I'm quite interested in this motor combination, so it
does not have the long 7.100 rods ?

Yes it has 7.100 rods in it.


Hutch