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#2446016 - 02/03/18 10:54 PM Cam question
cudacar340 Offline
super stock

Registered: 02/01/04
Posts: 831
Loc: Grosse Isle, Mi
Bought a new camshaft and lifters from guy online, supposed to be a Mopar .590 solid lifter cam. I measured the lobes, it's .570 lift with 1.5 rocker ratio. Part number on end is
4120662, have been looking for data , not finding anything with that number.
Anyone recognize the number? thanks

#2446029 - 02/03/18 11:15 PM Re: Cam question [Re: cudacar340]
70AARcuda Online   content

Registered: 01/20/03
Posts: 9639
Loc: las vegas
BB P4120663
SB P4120657

Edited by 70AARcuda (02/03/18 11:17 PM)

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 360 (10.641 @ 124.17 9/16/16 Bakersfield)

#2446154 - 02/04/18 09:45 AM Re: Cam question [Re: 70AARcuda]
RapidRobert Offline
Circle Track

Registered: 11/20/03
Posts: 33125
Loc: Lincoln Nebraska
the bb one is 312/312 adv dur. 104 overlap 106 cl .590/.590 lift 28/32 lash 3400-6900 basic RPM range spring rec P2806077 & says drag super comp. SB one has same exact specs (surprisingly) with spring p3614542 recommended & 4500-7000 RPM range, says drag pro comp, auto, with race converter. all above from MP 2001 catalogue. EDIT going from the above cam (663) (657) #'s

Edited by RapidRobert (02/04/18 10:20 AM)
live every 24 hour block of time like it's your last day on earth

#2446285 - 02/04/18 12:57 PM Re: Cam question [Re: cudacar340]
LaRoy Engines Offline

Registered: 10/17/11
Posts: 506
Loc: Idaho
Hmm, curious.

P4120661, 296-110, .557"
P4120662, you say, .570"
P4120663, 312-106, .590"

#2446380 - 02/04/18 03:19 PM Re: Cam question [Re: cudacar340]
Cab_Burge Offline
I Win

Registered: 08/23/03
Posts: 30191
Loc: Bend,OR USA
Have you measure the lobe lift yet? If not do that and post it on here, all lifts advertised are usually gross lift, not net lift so the valve lash has to be added onto the lobe lift to get the same results runaway
Did you know Mopar has had a number of different vendors grind there cams? Not all of the vendors grind the same cam part number the same way with the same results between the different vendors puke
One of the many reasons I don't buy and use that brand anymore on any of my motors down twocents
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

#2446515 - 02/04/18 06:36 PM Re: Cam question [Re: Cab_Burge]
cudacar340 Offline
super stock

Registered: 02/01/04
Posts: 831
Loc: Grosse Isle, Mi
I measured Lobe lift, it's .380 x 1.5 rocker ratio is where I calculate the lift at valve .570. Actual measured lift is .565 at valve with zero lash. Setting the lash to .025 reduces lift to .540.
I have run several Mopar cams and and found the lift on the box is actual lift at zero lash, within a few thou.

#2446521 - 02/04/18 06:41 PM Re: Cam question [Re: cudacar340]
cudacar340 Offline
super stock

Registered: 02/01/04
Posts: 831
Loc: Grosse Isle, Mi
I'm puzzled by the odd part number. I looked at some old mopart parts catalogs, nothing listed. Also the number is not stamped, it's a dot matrix number. If I had a receipt, I would return it.


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