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#2457838 - 02/26/18 10:16 AM Advancing cam on 6.1?
HP2 Offline
mopar

Registered: 09/25/04
Posts: 472
Loc: Right here
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!
_________________________
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda project car
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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#2459381 - 03/01/18 10:56 AM Re: Advancing cam on 6.1? [Re: HP2]
WO23Coronet Offline
master

Registered: 01/08/08
Posts: 4030
Loc: 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


Edited by WO23Coronet (03/01/18 12:02 PM)

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#2459421 - 03/01/18 12:01 PM Re: Advancing cam on 6.1? [Re: HP2]
ric3xrt Offline
super stock

Registered: 01/13/06
Posts: 1068
Loc: Trumbauersville PA
I've had good results with Install @ 112-114

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#2460323 - 03/02/18 11:25 PM Re: Advancing cam on 6.1? [Re: WO23Coronet]
RTSrunner Offline
pro stock

Registered: 11/03/03
Posts: 1323
Loc: 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?

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#2460940 - 03/04/18 12:48 PM Re: Advancing cam on 6.1? [Re: WO23Coronet]
HP2 Offline
mopar

Registered: 09/25/04
Posts: 472
Loc: 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.
_________________________
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda project car
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

Top
#2460942 - 03/04/18 12:50 PM Re: Advancing cam on 6.1? [Re: ric3xrt]
HP2 Offline
mopar

Registered: 09/25/04
Posts: 472
Loc: Right here
How did you do it? I was thinking to modify the original parts but there might be someone who makes adjustable gears?
_________________________
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda project car
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

Top
#2461180 - 03/04/18 07:14 PM Re: Advancing cam on 6.1? [Re: HP2]
WO23Coronet Offline
master

Registered: 01/08/08
Posts: 4030
Loc: 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

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#2461228 - 03/04/18 08:56 PM Re: Advancing cam on 6.1? [Re: WO23Coronet]
RTSrunner Offline
pro stock

Registered: 11/03/03
Posts: 1323
Loc: 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


Edited by RTSrunner (03/04/18 08:57 PM)

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#2462718 - 03/07/18 03:50 PM Re: Advancing cam on 6.1? [Re: HP2]
HP2 Offline
mopar

Registered: 09/25/04
Posts: 472
Loc: 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.
_________________________
70 'Cuda vert 340 clone, In Violet, white interior and top
70 'Cuda project car
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

Top

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