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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 11-04-2009, 03:44 PM
mcompany mcompany is offline
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Exclamation 08 5.7L Recommendations Please????

I have approximately 15k to blow. I was wondering which route I should go. All new internals and have a naturally aspirated 650 hp engine built by a professional for 10k or supercharge it and worry about internals as needed? Anyone that has a 500 hp plus truck, please reply and let me know what else Im going to need to upgrade other than performance. I imagine ill need new brakes and suspension, if so, send me in the right direction.
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Old 11-04-2009, 04:07 PM
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If you got 15k to blow, you can just put it in my bank account. I won't mind. My best judgement would be to build the 650 hp motor, build it extra strong, for reliability, and later add the supercharger for when 650 ponies aren't enough fun anymore.
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Old 11-04-2009, 04:35 PM
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Why don't you contact RDP Motorsports . They are one of our vendors here on our site . They do nice work . They were working on a new Challenger . Had it in the 9 second range . Give them a call and tell them you belong to Ramforumz and saw their ad here . Heres a link to their site . Let us know how you make out and keep in touch . Tom http://www.rdpmotorsport.com/
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Old 11-05-2009, 07:12 PM
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Yea I think Im gonna contact RDP motorsports. They are in painesville which is nice for me only a 2 hr drive. Thanks for the advice fellas, keep em coming though. Id like to hear some more ideas I really need to think it through. Well 09 bighorn, give me your 09 and I will haha. I knew I should have waited 6 months and just got the 09 but Im an idiot and jumped the gun. Oh well. I know im gna build the engine first and then I might do a twin turbo. I really dont know. I need to figure it out soon tho so some more advice would help. Twin turbs would run at wat about 8k. And build the engine as much as possible with other 7K. I have some major dilemmas man. Wanna decide which route to go....bc i kno i could easily spend 15k just in high performance internals machining and installation.
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Old 11-06-2009, 06:54 AM
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If you have the money to blow, I would go with the internals first and build up the strength of the engine so when you do decide to SC or TC it, you know that the engine can handle it(better than stock anyway)...You can raise the PSI well over 6psi(probably about 8psi maybe even 10psi, not sure) with the SC or TC with a modified engine unlike the stock engine which is only recommended to set the psi at 6psi max...I would def build the internals first though...
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Old 11-06-2009, 07:19 AM
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Like you said... you'll need bigger brakes for sure. I'm not sure what the breaking strength of the rear end is, but it's something to consider along with a drive shaft.

I found that out the hard way when I built up my Malibu in high school. I had a 350 bored .065 over, huge cam, bigger crank, Holly 850cfm carb, and a bunch of other goodies all hooked up to a Muncie M21 4 speed.

My first run out I dumped the clutch going into second and ripped out the rear end (the spider gears were turned to mush). It it weren't for the rev limiter that my boss insisted that I have installed I'd have been looking for a new engine too! A complete new rear end, a set of ladder bars, and about 2 wks of work and I was back on the road....

good luck

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Old 11-06-2009, 10:23 PM
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Excoastie, Appreciate it man. I just talked with my buddy and we both agreed I need a beefed up drive shaft and ladder bars. So thanks for the heads up. Brakes as well for sure and probably suspension so I dont get thrown around to bad haha. Keep the suggestions coming guys. When my truck is finished in the spring, you can bet yall will be gettin some dyno specs and engine pics maybe a few burnie pics. Thanks guys
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Old 11-07-2009, 02:45 PM
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There's quite a bit to consider in doing this. You're more than welcome to give me a call. 314-293-2700.

The tranny is also a factor when doing that much modding.

I say "forged internals and procharger".
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Old 11-07-2009, 03:48 PM
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"forged internals and procharger"....yep, that would be a great way to go.

Also consider any of the centrifugal blow systems. And a roots type blower, like a Kenne Bell setup, would be cool as well. They have kits for the 5.7L HEMI.

In addition to all the other items mentioned, a custom tune would be necessary. With a DiabloSport Predator programmer and a base tune, you'd have a good baseline to work with. Then with some work by a DiabloSport authorized CMR tuner, maximum potential will be achieved.

You could also go to a forged internals, 392 stroker motor based on the 6.1L HEMI.
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Old 11-07-2009, 06:51 PM
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Well, everyone seems to be bent on the motor. I'll focus a bit on the suspension then people can tear me apart A necessary upgrade will be a lower stance so you have a more stable ride, also a set of trac bars so you don't wrap the rear leafs when you go WOT. Have you thought about a light-weight driveshaft so you're not spinning as much inertia but transferring it better with less torsion?

I didn't see, but is it a 2WD or 4x4? if it's a 2WD, you'll need to beef up the rear diff with forged gears, if you could get them cryo'd that'd be a HUGE bonus, along with your forged internals, it'll add some huge longevity to them. If it's a 4x4 then you need to do the rear and front diffs, transfer case, and upgrde the wheel hubs.
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