As anyone heard of a 5.7L-6.1L Hemi swap - CarForums.net

Nicky B · 03-18-2006, 10:50 AM

Was thinking of buying an 04 Ram but swapping the 5.7L Hemi engine for the 6.1L Hemi. So I would start off running like a 13.9 in the 1/4mile and with bolt-on's get to where my ram is now for $2,500. Where as I have spent over 7k on my truck. So can this be done without major work needed in the engine bay.Or was thinking of getting an 04 Ram and putting an STS turbo on it cause at only 7psi your at over 400HP. So tune it to 10psi and pushing closer to 500HP on only 10psi.

**CF-Mike** · 03-18-2006, 11:39 AM

Never seen one, but I'm sure it can be done. I would search around and see if the motor is a direct bolt in.

Nicky B · 03-18-2006, 01:43 PM

Quote:

Originally Posted by CF-Mike

Never seen one, but I'm sure it can be done. I would search around and see if the motor is a direct bolt in.

And do you think $6500 for the 6.1L motor is a right price. And I would have someone expericanced to the swap I would be too scared thinking I might mess something up.

DodgeCharger · 03-18-2006, 02:16 PM

I'd say go for it, but trucks are not my specialty, neither is typing and spelling so i prolly mispelled somthing.

Nicky B · 03-18-2006, 02:45 PM

If I find out that it can be done without any major changes then I will do it. I wish dodge would come out with a SRT-8 Ram a little brother to the SRT-10 Ram. But I would probably wait another 2-3months so there are more options as far as performance parts go for the 6.1L Hemi engine.

Hjholter3 · 03-20-2006, 10:20 AM

The 6.1 may use diffrent motor mounts.. find out if they have the same bolt pattern on the transmission and if it's based on the same block.. if so, it's a go. From my understanding they are based on the same tooling..

Catholic Damage · 10-02-2006, 06:24 PM

no srt-8 in the future of the rams. i'm subcontracted put though roush for chrylser and do alot of ORVT, along with lexus and toyota.
as far as the swap, the 6.1 and 5.7 are the same basic motor, just the 6.1 is bored out, with different heads and a HUGE intake manifold with some big ass runners. you will need to modify the hood of the truck to het the heighth correct. as far as the motor mounts, im pretty sure they will be the same, but some cutting and welding should fix that up if need be. and for tranny, that im not too sure about. if you ahve a shortbed, shortcab, id go with a full srt-8 swap out of a charger for rwd, or super-skittle(grand cherokee) for awd, but the awd may be more work than worth.
your main problem is goin to be computers. the 5.7 hemi that is out now has a totally different computer that the 6.1(just wait till the next gen 5.7 comes out) the srt-8 motor has about 11 seperate computers(pcm, ecm, abs, etc etc) whereas oyour 5.7 has 5, i think.

IMHO, get an SKS aft turbo kit with intercooler, cam the motor, long tubes, port the heads, and get an ecm flash. youll be at an easy 500-550 rwhp. then if you feel the need, throw on a sneaky pete 75 wetshot. trust me, ive looked into a 6.1 swap a lil, and with my experience with workin on these motors all the time, pullin, installin, workin and flashin them, i know what im talkin about.

either way, good luck, and keep us posted.

Catholic Damage · 10-02-2006, 06:32 PM

btw- DO NOT go over 6psi if you dont reflash the ecm. stock flashes are NOT designed for ANY forced induction at all, but can get away with 5-6lbs if you dont romp on the motor daily. and the STS turbo isnt designed to go over 7lbs for that app for that reason, but some companies are offering a reflash, so you can safely tune for 10lbs. but id go 8lbs, with a flash, long tubes, and a SMALL shot to get your spool up thourgh first and help get the thing down the 60ft.

03-18-2006, 11:39 AM	#2
CF-Mike Mayor of CF CF Admin Join Date: Oct 2005 Location: Las Vegas Posts: 25,207 Vehicle Profile: Year: 1993 Make: Mazda Model: RX-7	Never seen one, but I'm sure it can be done. I would search around and see if the motor is a direct bolt in. __________________ Forum Rules \| Member Map \| Car Reviews \| Project RX-7 \| Project GTO

03-20-2006, 10:20 AM	#6
Hjholter3 CF's Pimp CF Senior Member Join Date: May 2004 Location: Crossville Tennessee Posts: 3,673	The 6.1 may use diffrent motor mounts.. find out if they have the same bolt pattern on the transmission and if it's based on the same block.. if so, it's a go. From my understanding they are based on the same tooling.. __________________ CF's 2nd Biggest E-Penis What you know about that? I know all about that

10-02-2006, 06:24 PM	#7
Catholic Damage 911? I dial .357! CF Moderator Join Date: Sep 2006 Location: In a van, down by the river. Posts: 12,844 Vehicle Profile: Year: 1975 Make: Freightliner Model: Gazz Guzzla	no srt-8 in the future of the rams. i'm subcontracted put though roush for chrylser and do alot of ORVT, along with lexus and toyota. as far as the swap, the 6.1 and 5.7 are the same basic motor, just the 6.1 is bored out, with different heads and a HUGE intake manifold with some big ass runners. you will need to modify the hood of the truck to het the heighth correct. as far as the motor mounts, im pretty sure they will be the same, but some cutting and welding should fix that up if need be. and for tranny, that im not too sure about. if you ahve a shortbed, shortcab, id go with a full srt-8 swap out of a charger for rwd, or super-skittle(grand cherokee) for awd, but the awd may be more work than worth. your main problem is goin to be computers. the 5.7 hemi that is out now has a totally different computer that the 6.1(just wait till the next gen 5.7 comes out) the srt-8 motor has about 11 seperate computers(pcm, ecm, abs, etc etc) whereas oyour 5.7 has 5, i think. IMHO, get an SKS aft turbo kit with intercooler, cam the motor, long tubes, port the heads, and get an ecm flash. youll be at an easy 500-550 rwhp. then if you feel the need, throw on a sneaky pete 75 wetshot. trust me, ive looked into a 6.1 swap a lil, and with my experience with workin on these motors all the time, pullin, installin, workin and flashin them, i know what im talkin about. either way, good luck, and keep us posted. __________________ Alcohol, Tobacco and Firearms should be a convenient store, not a government agency... The liver is evil, and must be punished!

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03-18-2006, 02:16 PM	#4
DodgeCharger Car Enthusiast CF Newbie Join Date: Mar 2006 Location: Little Rock, AR Posts: 22 Vehicle Profile: Year: 1969 Make: Dodge Model: Charger	I'd say go for it, but trucks are not my specialty, neither is typing and spelling so i prolly mispelled somthing.

03-18-2006, 02:45 PM	#5
Nicky B CF 5.7L HEMI Member CF Senior Member Join Date: Oct 2005 Posts: 2,458 Vehicle Profile: Year: 2006 Make: Dodge Model: Charger Hemi	If I find out that it can be done without any major changes then I will do it. I wish dodge would come out with a SRT-8 Ram a little brother to the SRT-10 Ram. But I would probably wait another 2-3months so there are more options as far as performance parts go for the 6.1L Hemi engine.

10-02-2006, 06:32 PM	#8
Catholic Damage 911? I dial .357! CF Moderator Join Date: Sep 2006 Location: In a van, down by the river. Posts: 12,844 Vehicle Profile: Year: 1975 Make: Freightliner Model: Gazz Guzzla	btw- DO NOT go over 6psi if you dont reflash the ecm. stock flashes are NOT designed for ANY forced induction at all, but can get away with 5-6lbs if you dont romp on the motor daily. and the STS turbo isnt designed to go over 7lbs for that app for that reason, but some companies are offering a reflash, so you can safely tune for 10lbs. but id go 8lbs, with a flash, long tubes, and a SMALL shot to get your spool up thourgh first and help get the thing down the 60ft.

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