6.4L engine swap from 5.7L vs. 392 stroker - Dodge Challenger Forum: Challenger & SRT8 Forums
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Old 10-24-2011, 03:27 PM
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6.4L engine swap from 5.7L vs. 392 stroker

I am not too knowledgeable in which of these would be better. A budget isn't really an issue here, but I want to make the choice that will benefit me the most in the long run. I will have a 392 in my 2010 R/T Classic one way or the other, but I want to know which will yield better long term results. I want to put a supercharger, different cam, and a bunch of other stuff to it after I get what I want.

The main dilema is just which will cost me the least while giving the high HP/TORQUE results that I want. Along with possible future upgrades to said engine. If anyone would be looking for a 5.7L if I would decide to get the 6.4L as the replacement, I would be willing to sell it.

Any and all input is greatly appreciated!
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Old 10-25-2011, 12:42 AM
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Originally Posted by koufeman View Post
I am not too knowledgeable in which of these would be better. A budget isn't really an issue here, but I want to make the choice that will benefit me the most in the long run. I will have a 392 in my 2010 R/T Classic one way or the other, but I want to know which will yield better long term results. I want to put a supercharger, different cam, and a bunch of other stuff to it after I get what I want.

The main dilema is just which will cost me the least while giving the high HP/TORQUE results that I want. Along with possible future upgrades to said engine. If anyone would be looking for a 5.7L if I would decide to get the 6.4L as the replacement, I would be willing to sell it.

Any and all input is greatly appreciated!
Why not drop in a forged crate 426 with a blower. If a budget isn't an issue, that's what I would do.
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Old 10-25-2011, 03:20 AM
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As much as I love my 392... And I do LOVE my 392.. I think if I was going to do a swap, the short block I'd swap in would be filled with all sorts of top shelf stuff. I'd want an aftermarket crank and I beam rods and forged slugs. Top the block off with some worked over 392 heads and go from there.
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Old 10-25-2011, 08:21 AM
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Originally Posted by AZ MSCL View Post
Why not drop in a forged crate 426 with a blower. If a budget isn't an issue, that's what I would do.
No offense, but if I wanted to do that it would have in my OP. I don't want to have to mod the hood or the engine compartment in any way to make room for a larger engine. And if I wanted a 426 I could just have the 6.4 bored out and make one that way.
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Old 10-25-2011, 11:23 AM
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They're physically the same size.....5.7, 6.1 and 6.4.
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Old 10-25-2011, 12:59 PM
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Originally Posted by koufeman View Post
No offense, but if I wanted to do that it would have in my OP. I don't want to have to mod the hood or the engine compartment in any way to make room for a larger engine. And if I wanted a 426 I could just have the 6.4 bored out and make one that way.
You can't tune the factory 6.4 as of now. End of the line if you swap one in.
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Old 10-25-2011, 03:40 PM
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Originally Posted by crater View Post
You can't tune the factory 6.4 as of now. End of the line if you swap one in.
From other discussions on this site I will be able to tune it on my car since it is still using the computer software in my 2010 which is suppose to still be compatible with the 6.4.
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Old 10-26-2011, 10:12 PM
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I don't know that a 392 stroker is the best choice if you're going to add a blower. Regardless, no offense taken. It's your car. Be advised that some folks will try to give you ideas that may be different from what you think may be ideal. So if you know what you want - do it. If cost were no issue, I suspect most here would start with a forged 426, as a nod to the old days, and go from there.
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Old 02-07-2012, 12:21 PM
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go supercharger I wanted to do the 392 swap also. But if cost s not an issue that 392 and supercharger. But I have been calling around and a the swap and labor is about 10,500.00 w/o SC.
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Old 02-07-2012, 01:49 PM
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I'd buy a 393 short block from PWR and go from there. Tuning the 5.7 and 6.4s will be more difficult. Plus you have nice cam choices in which you can actually tune for.
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