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Advancing cam on 6.1?

Posted By: HP2

Advancing cam on 6.1? - 02/26/18 05:16 PM

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!
Posted By: WO23Coronet

Re: Advancing cam on 6.1? - 03/01/18 05:56 PM

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
Posted By: ric3xrt

Re: Advancing cam on 6.1? - 03/01/18 07:01 PM

I've had good results with Install @ 112-114
Posted By: RTSrunner

Re: Advancing cam on 6.1? - 03/03/18 06:25 AM

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?
Posted By: HP2

Re: Advancing cam on 6.1? - 03/04/18 07:48 PM

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.
Posted By: HP2

Re: Advancing cam on 6.1? - 03/04/18 07:50 PM

How did you do it? I was thinking to modify the original parts but there might be someone who makes adjustable gears?
Posted By: WO23Coronet

Re: Advancing cam on 6.1? - 03/05/18 02:14 AM

My Ram is an 05 with a 5.7. There’s adjustable sets that you can get, although I haven’t bought one yet
Posted By: RTSrunner

Re: Advancing cam on 6.1? - 03/05/18 03:56 AM

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
Posted By: HP2

Re: Advancing cam on 6.1? - 03/07/18 10:50 PM

I found it to be worth to order a new adjustable timing gear set from Comp instead of hassling with the old set.
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