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Advancing cam on 6.1? #2457838
02/26/18 01:16 PM
02/26/18 01:16 PM
Joined: Sep 2004
Posts: 475
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HP2 Offline OP
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I'm replacing bearings, crank and some rods on a 6.1 Hemi. I bought the engine with a spun rod bearing. I will put it in a 1971 Sport Fury and use a A518 overdrive and 3.91.
I will run it all stock except for induction and exhaust and will probably use a MegaSquirt MS3 Gold Hemi controller.
My Sport Fury will serve as a fun daily driver and I was thinking to lower the power band some by advancing the cam a little.
Anyone done this on a 6.1?
I would like some input on this.
Thanks!


68 Dart GT ht project. Hemi clone..?
70 W100 Power Wagon. 318 4-spd
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda 383 project.
70 Sport Fury 440 2dr HT, will get that 6.1 Hemi...
71 Charger Super Bee - 383/727
72 Charger "Sabotage" - 440/727 - Street/Strip
Re: Advancing cam on 6.1? [Re: HP2] #2459381
03/01/18 01:56 PM
03/01/18 01:56 PM
Joined: Jan 2008
Posts: 4,176
Canada
WO23Coronet Offline
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WO23Coronet  Offline
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Canada
I think it’s a good idea. I know the recommendation when putting a 6.1 cam in a 5.7 is to advance it 8 degrees (from the factory installed centerline, not from the LSA). I believe the 6.1 cam has an LSA of 117 and has an ICL of 119 or 121 (I’ve seen both published) so it’s actuall 2-4 degrees retarded (I believe for purely emissions reasons). Seems most mild engines respond with advancing the cam in the 4 degree range so put in in at 113. I’m doing a 6.1 cam into my Ram and that’s where I’m going to install it. I say go for it

Last edited by WO23Coronet; 03/01/18 03:02 PM.
Re: Advancing cam on 6.1? [Re: HP2] #2459421
03/01/18 03:01 PM
03/01/18 03:01 PM
Joined: Jan 2006
Posts: 1,374
Trumbauersville PA
ric3xrt Offline
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ric3xrt  Offline
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Posts: 1,374
Trumbauersville PA
I've had good results with Install @ 112-114

Re: Advancing cam on 6.1? [Re: WO23Coronet] #2460323
03/03/18 02:25 AM
03/03/18 02:25 AM
Joined: Nov 2003
Posts: 1,448
Pittsburgh,PA
RTSrunner Offline
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RTSrunner  Offline
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Posts: 1,448
Pittsburgh,PA
Originally Posted By WO23Coronet
I think it’s a good idea. I know the recommendation when putting a 6.1 cam in a 5.7 is to advance it 8 degrees (from the factory installed centerline, not from the LSA). I believe the 6.1 cam has an LSA of 117 and has an ICL of 119 or 121 (I’ve seen both published) so it’s actuall 2-4 degrees retarded (I believe for purely emissions reasons). Seems most mild engines respond with advancing the cam in the 4 degree range so put in in at 113. I’m doing a 6.1 cam into my Ram and that’s where I’m going to install it. I say go for it


WO23,What engine is in your Ram a 6.1 or 5.7 & what year truck?

Re: Advancing cam on 6.1? [Re: WO23Coronet] #2460940
03/04/18 03:48 PM
03/04/18 03:48 PM
Joined: Sep 2004
Posts: 475
Right here
HP2 Offline OP
mopar
HP2  Offline OP
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Posts: 475
Right here
Originally Posted By WO23Coronet
I think it’s a good idea. I know the recommendation when putting a 6.1 cam in a 5.7 is to advance it 8 degrees (from the factory installed centerline, not from the LSA). I believe the 6.1 cam has an LSA of 117 and has an ICL of 119 or 121 (I’ve seen both published) so it’s actuall 2-4 degrees retarded (I believe for purely emissions reasons). Seems most mild engines respond with advancing the cam in the 4 degree range so put in in at 113. I’m doing a 6.1 cam into my Ram and that’s where I’m going to install it. I say go for it


Good to hear other people are thinking the same. Compression pressure will be a little higher but with good gas quality and octane I don't think there will be any problem.


68 Dart GT ht project. Hemi clone..?
70 W100 Power Wagon. 318 4-spd
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda 383 project.
70 Sport Fury 440 2dr HT, will get that 6.1 Hemi...
71 Charger Super Bee - 383/727
72 Charger "Sabotage" - 440/727 - Street/Strip
Re: Advancing cam on 6.1? [Re: ric3xrt] #2460942
03/04/18 03:50 PM
03/04/18 03:50 PM
Joined: Sep 2004
Posts: 475
Right here
HP2 Offline OP
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How did you do it? I was thinking to modify the original parts but there might be someone who makes adjustable gears?


68 Dart GT ht project. Hemi clone..?
70 W100 Power Wagon. 318 4-spd
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda 383 project.
70 Sport Fury 440 2dr HT, will get that 6.1 Hemi...
71 Charger Super Bee - 383/727
72 Charger "Sabotage" - 440/727 - Street/Strip
Re: Advancing cam on 6.1? [Re: HP2] #2461180
03/04/18 10:14 PM
03/04/18 10:14 PM
Joined: Jan 2008
Posts: 4,176
Canada
WO23Coronet Offline
master
WO23Coronet  Offline
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Posts: 4,176
Canada
My Ram is an 05 with a 5.7. There’s adjustable sets that you can get, although I haven’t bought one yet

Re: Advancing cam on 6.1? [Re: WO23Coronet] #2461228
03/04/18 11:56 PM
03/04/18 11:56 PM
Joined: Nov 2003
Posts: 1,448
Pittsburgh,PA
RTSrunner Offline
pro stock
RTSrunner  Offline
pro stock

Joined: Nov 2003
Posts: 1,448
Pittsburgh,PA
Originally Posted By WO23Coronet
My Ram is an 05 with a 5.7. There’s adjustable sets that you can get, although I haven’t bought one yet


I have Comp Cams adjustable timing set and 6.1 length pushrods to put in my 5.7.I bought a brand new Chrysler crate engine that a Chrysler tech owned and put a 6.1 cam in but did not advance the timing or change pushrods.This is an older engine but brand new,I think he installed the cam before it was known to advance it a few degrees.This engine is for my 2004 Durango that snapped a connecting rod & ruined the original block. So you are thinking install it @ 113* in the 5.7,I'll have to see what I can get it at with the Comp adjustable set.
Thanks
RT

Last edited by RTSrunner; 03/04/18 11:57 PM.
Re: Advancing cam on 6.1? [Re: HP2] #2462718
03/07/18 06:50 PM
03/07/18 06:50 PM
Joined: Sep 2004
Posts: 475
Right here
HP2 Offline OP
mopar
HP2  Offline OP
mopar

Joined: Sep 2004
Posts: 475
Right here
I found it to be worth to order a new adjustable timing gear set from Comp instead of hassling with the old set.


68 Dart GT ht project. Hemi clone..?
70 W100 Power Wagon. 318 4-spd
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda 383 project.
70 Sport Fury 440 2dr HT, will get that 6.1 Hemi...
71 Charger Super Bee - 383/727
72 Charger "Sabotage" - 440/727 - Street/Strip

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