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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 07-26-2012, 08:37 PM
02 Ram 02 Ram is offline
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Default engine swap ?'s

im only familiar with the late 80's-90-s turbo Dodges. we have a couple vendors that can flash our ECU's for custom cals. whatever our mods our, they can set it up custom for us.

as an example, say the cal is from a 2.5L and my car is a 2.2L. they can flash it with whatever cal we want and it will work so we can change computers if we needed to as long as its from that year. so my question is, can i swap in a 5.7L HEMI and still use my stock engine harness and computer? can it be flashed for that setup without the hassle of changing out everything. my plan is to get the HEMI and get the 6.4L HEMI stroker kit and stick it in my 4.7L truck. thanks guys
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  #2  
Old 07-27-2012, 10:12 AM
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snrusnak snrusnak is offline
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I don't think that'll work out. There's quite a few differences with the harness. And I don't know anyone that has the capability to reflash the pcm in that manner.
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  #3  
Old 07-27-2012, 01:06 PM
02 Ram 02 Ram is offline
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what i figured. was hoping to hear otherwise LOL
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  #4  
Old 07-27-2012, 01:09 PM
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snrusnak snrusnak is offline
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Really if you want a hemi it's best to sell your truck and buy a hemi truck.

I think I'm going to build long tubes for my 4.7 and maybe eventually turbo charge it. Not much else out there(as far as cams, etc). It'll be probably 450+ hp which is better than a hemi but will also be more expensive($3-5k). But to me it's fun and I like my truck and a turbo 4.7 will get better mpg than a hemi.
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  #5  
Old 07-27-2012, 01:23 PM
02 Ram 02 Ram is offline
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well, if its not hard to pump out around 450 HP or more than ill stick with the 4.7. i dont have any issues with it other than a little start up lifter tick which isnt even an issue. i just want it faster. the HP is 10 HP more than my 4 banger LOL i would have thought for a V8 it would be more. turbo is def. where i want to go no matter what engine. i was thinking of getting headers too but i wanna be sure what motor is staying in there first
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  #6  
Old 07-27-2012, 01:56 PM
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Yeah to get any real hp out of the older 4.7 you have to do a lot of work(heads,cams, etc) just to get 350-400hp. With turbo 400+ should be fairly easy.

The new 4.7 has a lot more hp stock, so it's easier to get to 450/500hp. Turbo'd it should hit 450 hp pretty easy (6-8psi). Still though I haven't seen any turbo 4.7. The bad thing about the new 4.7 is there's basically no aftermarket support.

Keep in mind all these engine's were designed to be truck engines. The older 4.7 may only have 235hp and isn't real fast but it has nearly 300lb ft of torque which is more than adequate for a light duty truck. And the newer 4.7 at 310hp/330lb ft is pretty impressive for a small v8.
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  #7  
Old 07-27-2012, 02:27 PM
02 Ram 02 Ram is offline
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true. im just used to my turbo 4 bangers. my RT is 224HP stock and my buddy has a holset on his that runs 35 PSI and over 500 HP. first thing i think of is V8 should be high HP. it seems theres really nothing for our 4.7's, old or new which sucks. im happy with it but we all want more if it can be obtained. ive googled it and have found a few turbo 4.7's. with the right compression it can happen but i havent dug around to see if i can get 8.5 to 1 pistons for the 4.7. id really like to run more along the lines of 12+ PSI
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  #8  
Old 07-27-2012, 03:03 PM
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snrusnak snrusnak is offline
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That's a lot of work and money. You could safely/reliably run 6-8psi on a stock 4.7 with no real mods other than what is required to mount up a turbo, injectors, etc. for a few thousand dollars and gain 150hp. At that rate you would get good mpg also.

To run that much boost you'd have to do internal engine work and spend some money, just not really worth it.
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  #9  
Old 07-27-2012, 03:13 PM
02 Ram 02 Ram is offline
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eh. i like to go crazy LOL im gonna dump around 8 grand into my IROC so i have no problem doing it to the truck. mod bug always bites me hard. with the mileage on my truck anyway, id wanna rebuild it so ill look for another 4.7L and tear it down, rebuild it and play. if its custom work anyway, i can get a holset for 300 bucks thats ready to run and just go from there. fresh rebuilt motor with a holset shouldnt run me too bad. ill want better cams and shit too anyway so it will be a project i can start when i find a motor and save some cash

just found this.

from.airram.com

If your building your 4.7L and plan to add boost or even Nitrous we have the set up for you.

We currently offer Forged Cranks, SCAT H-Beam Rods & Ross Pistons all for your 4.7L engine.
Here is a direct link to our 4.7L Performance section!

4.7L DODGE/JEEP - FORGED ROSS PISTONS
LOCATOR ID: 1023
BRAND: ROSS
PART #47ROSS

Price:
$750.00
FREE SHIPPING!


4.7L - FORGED CRANKSHAFT -
LOCATOR ID: 1290
BRAND: AIR RAM PERFORMANCE

Price:
$669.00
FREE SHIPPING!




1999-2007 4.7L - PERFORMANCE HEAD GASKETS - COMETIC - (EACH)
LOCATOR ID: 1401
BRAND: COMETIC
PART #C5213-X3X EA

Price:
$99.00
FREE SHIPPING!


4.7L SCAT H-BEAM RODS - 4340 FORGED - ARP2000 BOLTS
LOCATOR ID: 1313
BRAND: SCAT
PART #2-287-6125-2007-A2000

Price:
$895.00


4.7L SCAT H-BEAM RODS - 4340 FORGED - ARP8740 BOLTS
LOCATOR ID: 1051
BRAND: SCAT
PART #2-287-6125-2007-8740

Price:
$795.00
FREE SHIPPING!
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Last edited by 02 Ram; 07-27-2012 at 03:25 PM.
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  #10  
Old 07-27-2012, 03:54 PM
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snrusnak snrusnak is offline
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Yeah airram has what you'd need. It's expensive though. You're talking thousands of dollars to build an engine that can handle the boost. Then you still have to spend the thousands to boost it lol. I like the 4.7L but if I were to be looking for 500+hp I'd look at other options that or supported better. Personally, I wouldn't touch the bottom end of the 4.7L, it's good for up to about 500 hp and if you want more than that you're asking a lot of a 287 cid engine.
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