5.7l Hemi

[vinb]

Anybody have any experience with putting a 2004 5.7L Hemi out of a pick-up in a Cuda. The reason why I'm bringing this up is someone is selling one with a 4X4 Transmission complete. He is asking $2k. I did not call him yet. Looking for a little feedback if possible....Is it worth the trouble and could I use my current 727 Trans, etc.etc....Thanks Vin....

[Hopalong]

The latest issue of Hot Rod magazine has a lot of good info on this swap.  They followed one that was put into a Duster with an A-518 overdrive tranny.  They used a crate engine but kinda cover what else is needed if using a donor engine.  To me, the disappointing part was that they used a 360 h.p. engine and got 250 h.p. at the wheels.  Does the tranny and drive train really eat up 110 h.p.?  Are the crate engines tested with acessories on the front when the horse power numbers are figured?

[vinb]

Thanks Hopalong, I will be going out later. I'll check it out. I was just looking at a earlier post. Got some info on that.....

[71bigblock]

Im gonna do this to my '67 pickup.  That is a VERY good price for that combo.  Does it come with wiring harness and ECM?  I know that its the same tranny bolt pattern.  It also will have an 8 bolt crank.  Just some things to consider.  All I want to know is if I can use the OEM wiring harness with a 518, and how much of a headache it is.  How does the speedometer work?  Do you need the gas pedal from the vehicle, drive by wire?  I got questions like you vinb, I want some answers, too.   

[71bigblock]

See here...

http://www.cuda-challenger.com/cc/index.php?topic=32204.0

[57hemicuda]

Here is whats left of the web site of the car I built and sold at barrett jackson http://mysite.verizon.net/ls6ron/

[Hot_Rodder]

IMO... Rather than the 5.7 Hemi, which I've driven one of the trucks and was far from being impressed, I'd check out the 6.1 Hemi.... But that's my MO.... The 6.1 being rated at 425, and the 5.7 being rated at what again? Then again, the 5.7 would be a nice cruising motor I suppose, I'm more for power, lol .

[71bigblock]

IMO... Rather than the 5.7 Hemi, which I've driven one of the trucks and was far from being impressed, I'd check out the 6.1 Hemi.... But that's my MO.... The 6.1 being rated at 425, and the 5.7 being rated at what again? Then again, the 5.7 would be a nice cruising motor I suppose, I'm more for power, lol .

I agree, but a used 5.7 is less than half of a used 6.1 from what I've found.  Yeah, its got 125 more horse, but...   

[Hot_Rodder]

true, doesn't kenny bell also make a supercharger now for the 5.7?


Yes they do..... Here's a link: http://www.kennebell.net/superchargers/dodge/hemi57/hemi57.htm Quoted from there site: easily producing over 500HP with the Kenne Bell supercharger kit.

[57hemicuda]

12.40 @111mph on a truck motor with nothing but a cam and headers,ain't bad though.I've seen a couple of 6.1 hemi conversions that couldn't get out of the 13's

[FC7VERT]

12.40 @111mph on a truck motor with nothing but a cam and headers,ain't bad though.I've seen a couple of 6.1 hemi conversions that couldn't get out of the 13's

What cam did you use?

[57hemicuda]

comp's 273 cam

[SilverChally]

Cams definetly wake em up!

[PlumCraZRT]

From the last article ive read on the subject, thats the biggest cam you can put in the engine before valve-to-piston clearance becomes a problem.  Anyway, there is a way old hot rod article on hot rodding a 5.7 L.  The hardest part is doing the electronics business.  Everything they did (intake, headers, cam) woke up the engine, but getting the fuel/spark curve tailored for it was the hard part.  In that old article nobody had figured out how to hack into the stock ECM software, so they ended up making a wasted spark ignition and using a FAST (was it FAST?) management system.  Anyway, they made a totally custom system and I think thats pretty easily available nowadays.  I was pretty impressed with the numbers they turned from that thing with minor upgrades.  I wanna say 480 hp from headers, intake, cam... cant say for sure tho.  Anyway, something to think about.

[HP2]

Does the tranny and drive train really eat up 110 h.p.?  Are the crate engines tested with acessories on the front when the horse power numbers are figured?

The drivetrain does consume a fair amount of power. The weight of transmission internals, driveshaft, axles and gears, tires and wheels all subtract from the available power at the ground. There also is the atmospheric condition present during testing that will have a big impact on that as well. For example, where I live we can have adjusted altitude readings that are the equivilent of 10,000 ft above sea level. The air force requires pilots to wear oxygen masks at that height, yet we run our vehicles in it all the time.

I assume crate motors are tested to net horsepower ratings (muscle car claims from 30 years ago were gross ratings), but there are a few variations of how the net is derived that can alter the result.