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383 valve spring specs. #1663103
08/24/14 05:12 PM 08/24/14 05:12 PM
Joined: Feb 2012
Posts: 137
midwest - USA
6
69/70 Plymies Offline OP
member
69/70 Plymies  Offline OP
member
6

Joined: Feb 2012
Posts: 137
midwest - USA
Can anyone tell me the ratings of these valve springs? Need to know if they are interchangeable: Mopar#P3690933 vs. Comp#926-16

Ref. 1970 Plymouth 383HP
Re: 383 valve spring specs. [Re: 69/70 Plymies] #1663104
08/25/14 01:04 PM 08/25/14 01:04 PM
Joined: Jan 2003
Posts: 16,376
D
dogdays Offline
I Live Here
dogdays  Offline
I Live Here
D

Joined: Jan 2003
Posts: 16,376
COMP Cams#249-926-16
Single Outer Valve Springs
•Rate: 415 lbs
•1.062'' ID, 1.476'' OD
•Seat Load: 109 lbs at 1.800''
•Open Load: 317 lbs at 1.300''
•Coil Bind Height: 1.140''
•With Damper

MP springs - there aren't any published specs that I can find. MP doesn't think we're smart enough to use specifications.

I'd pick the other springs.

R.
Re: 383 valve spring specs. [Re: 69/70 Plymies] #1663105
08/25/14 11:54 PM 08/25/14 11:54 PM
Joined: Jan 2003
Posts: 2,005
s. e. pa.
C
calrobb2000 Offline
top fuel
calrobb2000  Offline
top fuel
C

Joined: Jan 2003
Posts: 2,005
s. e. pa.
hi

933s are good for .510 lift !

Re: 383 valve spring specs. [Re: dogdays] #1663106
08/26/14 12:28 AM 08/26/14 12:28 AM
Joined: Feb 2012
Posts: 137
midwest - USA
6
69/70 Plymies Offline OP
member
69/70 Plymies  Offline OP
member
6

Joined: Feb 2012
Posts: 137
midwest - USA
Quote:



MP springs - there aren't any published specs that I can find. MP doesn't think we're smart enough to use specifications.





Hey,Dogdays,your statement made my day..hard laugh. Isn't it the truth. Us Mopar motorheads can hold our own, anywhere! Details is what blows other cars doors off! Thanks for the details.

Re: 383 valve spring specs. [Re: 69/70 Plymies] #1663107
08/26/14 11:45 PM 08/26/14 11:45 PM
Joined: Aug 2005
Posts: 4,799
ILL
M
MLR426 Offline
master
MLR426  Offline
master
M

Joined: Aug 2005
Posts: 4,799
ILL
It is more spring then required.

MLR426

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