Re: 1962 Mopars, 361/305 HP
 

More detail:
I just thought maybe the 1962 361/305 had the hottest setup (ie maybe solid cam option) because it seems like all the Nationals winning 361/305 cars were 1962 cars. NHRA says the 1961 361/305 offered a hyd and solid cam, so I figured maybe 1962 did as well. From the LIFT, it looks that way but those NHRA Blueprint files are vague sometimes.


For the FACTORY stock cam I've seen ranges of 252-252 duration, .390 .390 lift to 268-268 duration, .430 .430 lift.
That's for 1958-62.

NHRA Blueprint files show the 1962 lift as .444 .456.
305 361 DP .020 Flat 2080/1660 444/456 .020 Outer w Damp

From other engines in the NHRA files I would *GUESS* that's a solid cam.
For example below is the 1961 NHRA Blueprint.
Look how many times the same HP engine offers 2 or more cams.
Anybody know which cams there are (I'm guessing .430 .430 is hyd, .446 .458 is solid?)
And which one Kempton ran for all those wins (guessing the bigger solid one?)
Anything on duration or even part # etc appreciated.
305 361 D .023 Flat 2080/1600 430/430 020 Outer w Damp 1,2
305 361 D .023 Flat 2080/1600 446/458 020 Outer w Damp 1,2

330 383 D .023 Flat 2080/1600 430/430 020 Outer w Damp 1,2
330 383 D .023 Flat 2080/1600 446/458 020 Outer w Damp 1,2

340 383 D .023 Flat 2080/1600 430/430 020 Outer w Damp 1,2
340 383 D .023 Flat 2080/1600 449/454 020 Outer w Damp 1,2

350 413 D .051 Flat 2080/1600 430/430 020 Outer w Damp 1,2
350 413 D .051 Flat 2080/1600 446/458 020 Outer w Damp 1,2

375 413 D .051 Flat 2080/1600 430/430 020 Outer w Damp 1,2
375 413 D .051 Flat 2080/1600 449/454 020 Outer w Damp 1,2
375 413 D .051 Flat 2080/1600 446/458 020 Outer w Damp 1,2

Notes:
1 – Available with solid OR hydraulic lifters.
2 – Optional 2.080/1.740 valves in same head.

Re: 1962 Mopars, 361/305 HP
 

Class Racer Info will tell you if the combination is hydraulic or solid.

That being said, for the most accurate info, you would need the blueprint specs from the actual years you are researching. It seems some things have changed through the years in the NHRA Classification Guides, so what is published now, may not be what was originally published in 1962, 1963, etc.

Re: 1962 Mopars, 361/305 HP
 

Thanks I did look in there but just copied in the excerpts above that gave valve LIFT.

For the 361/305hp the NHRA Blueprint .doc files say
1960=M lift .446 .458
1961=H or M lift .430 .430 or .446 .458
1962=H lift .444 .456

Note that 1962 says "H", but the "H" cam was always either .390 .390 lift or .430 .430 lift. That .444-.446 intake .456-.458 exhaust lift is almost always an "M" cam everywhere else it's listed. I'd bet all the factory cars were "H" cam but was wondering, was there an "M" cam option for 1962 with one of those "special letters to NHRA" that all of them wrote now & then.

Seems the National Winners/Records 361/305 cars were ALL 1962 so I'm trying to figure why, other than lower head cc, that year was so "hot".

Re: 1962 Mopars, 361/305 HP
 

62 361/305,271 is a great combo for stock even better in a 6 or 9 passinger wagon the worst parts of this combo is finding the intake.

Re: 1962 Mopars, 361/305 HP
 

I did find some info over on HAMB.
See pg554, Chuck Norton said that Kempton ran a solid cam in his 62-361/305-4v.

I'm just guessing here, that it was the same solid as in the 383/343-8v combo?


https://www.jalopyjournal.com/forum/...01085/page-554

Re: 1962 Mopars, 361/305 HP
 

We will see what this does in modern times. Working on getting the piston approved.

Re: 1962 Mopars, 361/305 HP
 

Do you recall the piston min volume cc's?
NHRA Blueprint file doesnt have that detail in it.

Re: 1962 Mopars, 361/305 HP
 

There is no volume its completely flat. Piston to valve clearance will be an issue.

Re: 1962 Mopars, 361/305 HP