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  #829  
Old 03-27-2014, 07:11 AM
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As long as the piston diameter is the same it shouldn't matter. You can make a 426 into a 440 just by changing the crank. Same with a 6.1-6.4. It's all about the stroke. Still it's going to be a uphill battle. Performance wise the focus was the SRT. There really isn't even a lot of options for us.
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  #830  
Old 03-27-2014, 07:23 AM
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Originally Posted by Murderedsrt View Post
As long as the piston diameter is the same it shouldn't matter. You can make a 426 into a 440 just by changing the crank. Same with a 6.1-6.4. It's all about the stroke. Still it's going to be a uphill battle. Performance wise the focus was the SRT. There really isn't even a lot of options for us.
True but I cant increas displacement by changing cranks. No one makes an after market crank or cam for that matter on the 3.7. But I can get better pistons from and rods from a 4.7. You guys have way bigger of a aftermarket
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  #831  
Old 03-27-2014, 07:35 AM
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Yea it's there but it's only 2-3 reputable companies and the rest are say say but it's all the same stuff it's just a matter of what you want to pay and the quality you want. They don't always go hand at hand either. Like I say, it's not. Custom if you're not cuttin.
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  #832  
Old 03-27-2014, 07:38 AM
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Re: 3.7l performance love

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Originally Posted by Murderedsrt View Post
Yea it's there but it's only 2-3 reputable companies and the rest are say say but it's all the same stuff it's just a matter of what you want to pay and the quality you want. They don't always go hand at hand either. Like I say, it's not. Custom if you're not cuttin.
I think ross pistons and scat rods are fairly reputable. nut I do agree on the latter. take my exhaust for example
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  #833  
Old 03-29-2014, 08:10 AM
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Re: 3.7l performance love

So what internals would you need to upgrade in order to supercharge it?
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  #834  
Old 03-29-2014, 08:42 AM
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Re: 3.7l performance love

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Originally Posted by DKDunn View Post
So what internals would you need to upgrade in order to supercharge it?
Pistons/Rods:
they can be found at airramperformance.com. they are listed under 4.7, but they will fit the 3.7. the rods are a hair longer then oem so you will need to lower the CR using pistons that have lower CR. (compression ratio). New bearings I definitely recommend. One detail that differentiate the 3.7 and 4.7 cranks is that the 3.7 has a slightly longer stroke then a 4.7, thus the need for lower CR pistons.

Ignition:
WeaponX has just recently released a set of stage 2 ignition coils, they claim a 30% increase over stock.

Fuel system:
also found at airram, the stinger brand injectors. they have up to 43# injectors. stock on a 3.7 are 21.5#, im running 26# from a mustang cobra. (better spray pattern and better flow up top)
I need to do some more research on what the fuel flow rate is on the factory fuel pump, and see if I can find a suitable one from walboro...

Tuning:
Ah tuning, this is the most difficult part. there is barely and tuning support on the 3.7 and finding a tuner willing to play with the 3.7's NGC ecu is gonna be hard. did some digging around on motec's site for a stand alone, but don't think any thing will work. same for aem. a standalone will need to be can-bus compatible...

Transmission:
Well the 3.7 is paired up with the NAG1/W5A580 from the SRT. it has a different tune then the srt tho. again it comes down to a tuner willing to play with the ecu/tcm. It SHOULD BE capable of handling whatever a boosted 3.7 can throw out. same trans has seen up to 600HP in srt's although some transmissions have died at power levels a little higher then stock in the srt.

If you get all that sorted out, I believe a properly setup and tuned turbo 3.7 could generate 400-550 on 8-12 psi of boost.
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  #835  
Old 03-29-2014, 09:33 AM
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Try talking to Johan at diablosport or jerseyboy. If you ask around on the red site or the SRT guys I'm sure someone can get you contact info. Most guys have turned by one of the two
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Old 03-29-2014, 09:42 AM
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Re: 3.7l performance love

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Originally Posted by Murderedsrt View Post
Try talking to Johan at diablosport or jerseyboy. If you ask around on the red site or the SRT guys I'm sure someone can get you contact info. Most guys have turned by one of the two
i'll keep that in mind bro, im still in korea. plus I want a second 3.7 engine before I do this...
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  #837  
Old 03-29-2014, 12:18 PM
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Here in the states you should be able to find a block and tranny in a junk yard. I'm sure there were enough mass produced 3.7 GCs that there is a smashed up body in a yard with a pristine block and tranny sitting in it.
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  #838  
Old 03-29-2014, 01:23 PM
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i'll keep that in mind bro, im still in korea. plus I want a second 3.7 engine before I do this...
Or you could get a 6.1 crate or salvage motor and call it a day
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  #839  
Old 03-29-2014, 01:26 PM
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Re: 3.7l performance love

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Or you could get a 6.1 crate or salvage motor and call it a day
you know I cant do that lol
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  #840  
Old 03-29-2014, 02:10 PM
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you know I cant do that lol
Actually I think you can do it I mean it basically you know brand-new accessories motor mounts and a new harness PCM can't be much harder then a TwinTurbo set up. if they can put that motor in a 1970 Challenger and a Jeep Wrangler then it should have no problem going to your grand Cherokee Good luck with the rest of the drivetrain though that diff is going to blow right away.
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