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6.4 SRT cam in a stock 5.7 Ram #2669765 06/25/19 12:20 PM 06/25/19 12:20 PM
Joined: Jan 2008 Posts: 4,254 Canada WO23Coronet OP master
WO23Coronet OP master Joined: Jan 2008 Posts: 4,254 Canada	I’ve got a ‘13 Ram 1500 with a 5.7 and a ticking lifter. I think it’s beyond the “they all do that” and it’s for resale so I’m going to fix it. Hoping to be able to just replace a bad lifter but expecting the cam to be damaged as well. I know I read on here where a guy did a cam change on a 5.7 in a 2500 and used a 6.4 SRT cam and it worked fine with the stock tune etc. Just wondering if anyone has any input or if the member who did it will chime in (I can’t remember who it was lol)

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: WO23Coronet] #2669927 06/25/19 08:29 PM 06/25/19 08:29 PM
Joined: Dec 2005 Posts: 9,719 Home S SRT6776 I hate internal combustion engines!
SRT6776 I hate internal combustion engines! S Joined: Dec 2005 Posts: 9,719 Home	It was a 5.7 Durango, shouldn't be hard to find, probably on the 2nd or 3rd page

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: SRT6776] #2671337 06/28/19 10:13 PM 06/28/19 10:13 PM
Joined: Nov 2003 Posts: 5,160 Texas dannysbee master
dannysbee master Joined: Nov 2003 Posts: 5,160 Texas	Pretty sure that post was by HotRodDave. Getting old just means you were smarter than some and luckier than others.

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: SRT6776] #2671382 06/29/19 01:10 AM 06/29/19 01:10 AM
Joined: Jan 2007 Posts: 10,124 A Red State SNK-EYZ I Live Here
SNK-EYZ I Live Here Joined: Jan 2007 Posts: 10,124 A Red State	I think that this is the thread he's talking about. https://board.moparts.org/ubbthread...6/vvt-cam-swap-question.html#Post2632886 Kayse can't keep up at all now. lol

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: WO23Coronet] #2671486 06/29/19 11:02 AM 06/29/19 11:02 AM
Joined: Jan 2003 Posts: 554 Mesa , Az Jambbii mopar
Jambbii mopar Joined: Jan 2003 Posts: 554 Mesa , Az	I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune! 70 Challenger 1960 Town Wagon P Pump 24v cummins project 06 Mega 3500 Drw 2wd 12 Durango R/T 18 Power Wagon 67 A100

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: Jambbii] #2674763 07/06/19 10:53 AM 07/06/19 10:53 AM
Joined: Jul 2019 Posts: 194 Springtown Pa R Ray408G3Hemi member
Ray408G3Hemi member R Joined: Jul 2019 Posts: 194 Springtown Pa	Originally Posted by Jambbii I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune! That'll wake it up even more... I've seen ric do the swap about 6 different times a few trucks and Challengers and each time it amazes me why FCA doesn't do it with the 5.7 Challengers, I can understand the trucks not geting it,. but the 5.7 R/T Challenges form new would be F@#$ing monsters. 1963 Thunderbolt 496FE 10.80 (still a work in progress) 1968 Mustang slow a$$ 428 FE 1971 Boss 351 Mustang 11.20@115mph 1993 Lightning 10.61 @ 129mph 408Ci A3 headed NA 1996 Viper GTS 2001 Lightning 8.99 @ 155MPH 5.4 Mod Motor 2009 Ram 9.65@144MPH 463CI G3 NA 2010 Challenger 9.91 @ 139MPH 408CI G3ci NA 2019 F150 (local dealer's Lightning package) ..11.90s

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: Ray408G3Hemi] #2674961 07/06/19 07:28 PM 07/06/19 07:28 PM
Joined: Sep 2011 Posts: 146 Australia L L4staero member
L4staero member L Joined: Sep 2011 Posts: 146 Australia	Originally Posted by Ray408G3Hemi Originally Posted by Jambbii I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune! That'll wake it up even more... I've seen ric do the swap about 6 different times a few trucks and Challengers and each time it amazes me why FCA doesn't do it with the 5.7 Challengers, I can understand the trucks not geting it,. but the 5.7 R/T Challenges form new would be F@#$ing monsters. Why would people buy a 485hp 6.4 when they can buy a 450hp 5.7? They detuned the 5.7 heavily for this reason

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: L4staero] #2674969 07/06/19 07:58 PM 07/06/19 07:58 PM
Joined: Jul 2019 Posts: 194 Springtown Pa R Ray408G3Hemi member
Ray408G3Hemi member R Joined: Jul 2019 Posts: 194 Springtown Pa	Originally Posted by L4staero Originally Posted by Ray408G3Hemi Originally Posted by Jambbii I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune! That'll wake it up even more... I've seen ric do the swap about 6 different times a few trucks and Challengers and each time it amazes me why FCA doesn't do it with the 5.7 Challengers, I can understand the trucks not geting it,. but the 5.7 R/T Challenges form new would be F@#$ing monsters. Why would people buy a 485hp 6.4 when they can buy a 450hp 5.7? They detuned the 5.7 heavily for this reason Max it would be 410/420.......Why did people buy a 390 HP 6 pak when they could buy a 425hp Hemi? ...besides if it was say 425 Hp vs 485Hp the TQ of the 6.4 would still lure enough Speed freaks to the 6.4 over the 5.7 to make it worth while. 1963 Thunderbolt 496FE 10.80 (still a work in progress) 1968 Mustang slow a$$ 428 FE 1971 Boss 351 Mustang 11.20@115mph 1993 Lightning 10.61 @ 129mph 408Ci A3 headed NA 1996 Viper GTS 2001 Lightning 8.99 @ 155MPH 5.4 Mod Motor 2009 Ram 9.65@144MPH 463CI G3 NA 2010 Challenger 9.91 @ 139MPH 408CI G3ci NA 2019 F150 (local dealer's Lightning package) ..11.90s

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: Ray408G3Hemi] #2675010 07/06/19 09:24 PM 07/06/19 09:24 PM
Joined: Sep 2011 Posts: 146 Australia L L4staero member
L4staero member L Joined: Sep 2011 Posts: 146 Australia	Originally Posted by Ray408G3Hemi Originally Posted by L4staero Originally Posted by Ray408G3Hemi Originally Posted by Jambbii I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune! That'll wake it up even more... I've seen ric do the swap about 6 different times a few trucks and Challengers and each time it amazes me why FCA doesn't do it with the 5.7 Challengers, I can understand the trucks not geting it,. but the 5.7 R/T Challenges form new would be F@#$ing monsters. Why would people buy a 485hp 6.4 when they can buy a 450hp 5.7? They detuned the 5.7 heavily for this reason Max it would be 410/420.......Why did people buy a 390 HP 6 pak when they could buy a 425hp Hemi? ...besides if it was say 425 Hp vs 485Hp the TQ of the 6.4 would still lure enough Speed freaks to the 6.4 over the 5.7 to make it worth while. Remember some models they sold well below 100 426 hemis as the others were so close power wise and faster on the street. I think it you fit the 6.4 cam, intake manifold and exhaust manifolds to a 5.7 Eagle and tune it the power difference wouldnt be very different. The factory 5.7 tune runs AFR at 10 to kill power. Reality is its only some c.i difference, 0.4 comp and 20 cfm less

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: L4staero] #2675946 07/09/19 11:55 AM 07/09/19 11:55 AM
Joined: Jan 2003 Posts: 17,836 S.E. Michigan ZIPPY I Live Here
ZIPPY I Live Here Joined: Jan 2003 Posts: 17,836 S.E. Michigan	Some folks with expensive college degrees, who are a whole lot smarter than me, in the past have explained: OEMs often calibrate WOT over rich to prolong the life of emissions equipment such as catalytic converters. It's not done for the sole purpose of killing power. It's done to save car companies money because in the United States there is a Government mandated 8 year/80,000 mile warranty on emissions equipment. I guess there is a chance I was being lied to, but it seems to make sense. https://www.epa.gov/transportation-...ent-questions-related-transportation-air Rich H. Esse Quam Videri

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: ZIPPY] #2676051 07/09/19 05:24 PM 07/09/19 05:24 PM
Joined: Sep 2011 Posts: 146 Australia L L4staero member
L4staero member L Joined: Sep 2011 Posts: 146 Australia	Originally Posted by ZIPPY Some folks with expensive college degrees, who are a whole lot smarter than me, in the past have explained: OEMs often calibrate WOT over rich to prolong the life of emissions equipment such as catalytic converters. It's not done for the sole purpose of killing power. It's done to save car companies money because in the United States there is a Government mandated 8 year/80,000 mile warranty on emissions equipment. I guess there is a chance I was being lied to, but it seems to make sense. https://www.epa.gov/transportation-...ent-questions-related-transportation-air Excellent point however the 6.4 runs like 2 points leaner than the 5.7 right up in its best power AFR range

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: L4staero] #2676160 07/10/19 07:11 AM 07/10/19 07:11 AM
Joined: Jan 2003 Posts: 8,017 Tulsa OK Bad340fish master
Bad340fish master Joined: Jan 2003 Posts: 8,017 Tulsa OK	Originally Posted by L4staero Originally Posted by ZIPPY Some folks with expensive college degrees, who are a whole lot smarter than me, in the past have explained: OEMs often calibrate WOT over rich to prolong the life of emissions equipment such as catalytic converters. It's not done for the sole purpose of killing power. It's done to save car companies money because in the United States there is a Government mandated 8 year/80,000 mile warranty on emissions equipment. I guess there is a chance I was being lied to, but it seems to make sense. https://www.epa.gov/transportation-...ent-questions-related-transportation-air Excellent point however the 6.4 runs like 2 points leaner than the 5.7 right up in its best power AFR range They never worried about the 6.4 pulling a trailer up a mountain wide open for 5 minutes either, they have to consider that with the 5.7 truck engines. I would be curious to see the 6.4 BGE vs the 6.4 car motor. 68 Barracuda Formula S 340

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: Bad340fish] #2676637 07/11/19 07:09 PM 07/11/19 07:09 PM
Joined: Sep 2011 Posts: 146 Australia L L4staero member
L4staero member L Joined: Sep 2011 Posts: 146 Australia	6.4 SRT Jeep GC can tow 7,000lbs no problems, as can the 5.7 Jeep Grand Cherokee. Yet the 5.7 runs dramatically richer. Same thing when both engines are in a Challenger. If you dont believe me download HP Tuners software and look at some standard files. You can see under Power Enrichment above 4250RPM the 5.7 is heavily richened compared to the 6.4. Also note that the Ram 5.7 made more HP than the car 5.7 as 5.7 was the only engine option until 2014 when they added the 6.4 BGE

Re: 6.4 SRT cam in a stock 5.7 Ram [Re: L4staero] #2676645 07/11/19 08:03 PM 07/11/19 08:03 PM
Joined: Jan 2005 Posts: 12,415 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,415 Kalispell Mt.	the truck 5.7 also had active intake to switch between long and short runners as well as the front runners on the intake are not squashed down like the front runners of the car intake. I am not causing global warming, I am just trying to hold off a impending Ice Age!

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