Originally Posted by L4staero
Originally Posted by Ray408G3Hemi
Originally Posted by Jambbii
I have the Durango. HotRodDave gave me the advice. I did the valve springs as well and took .020 of the heads. Still running good! My only complaint is that now I need to do headers and a custom tune!


That'll wake it up even more...
I've seen ric do the swap about 6 different times a few trucks and Challengers and each time it amazes me why FCA doesn't do it with the 5.7 Challengers, I can understand the trucks not geting it,. but the 5.7 R/T Challenges form new would be F@#$ing monsters.


Why would people buy a 485hp 6.4 when they can buy a 450hp 5.7?

They detuned the 5.7 heavily for this reason


Max it would be 410/420.......Why did people buy a 390 HP 6 pak when they could buy a 425hp Hemi? ...besides if it was say 425 Hp vs 485Hp the TQ of the 6.4 would still lure enough Speed freaks to the 6.4 over the 5.7 to make it worth while.

1963 Thunderbolt 496FE 10.80 (still a work in progress)
1968 Mustang slow a$$ 428 FE
1971 Boss 351 Mustang 11.20@115mph
1993 Lightning 10.61 @ 129mph 408Ci A3 headed NA
1996 Viper GTS
2001 Lightning 8.99 @ 155MPH 5.4 Mod Motor
2009 Ram 9.65@144MPH 463CI G3 NA
2010 Challenger 9.91 @ 139MPH 408CI G3ci NA
2019 F150 (local dealer's Lightning package) ..11.90s