New Build What Direction - Competition Diesel.Com

dangerous06 · 05-06-2017, 11:45 AM

Well my 06 6.7 dually is no more! I was made an offer I couldn't refuse!
So I'm looking for a new 06 Dually 4x4 and going to build another motor!
The 6.7 with 5.9 electronics was Awesome. The pure grunt of towing heavy was amazing.
So my question is 6.7 or 6.4 I'm doing Carrillo rods either way so same cost.
The 5.9 revved great the 6.7 slightly less so would a 6.4 be the best of both worlds?
Would love to hear from those that ran all three and their impressions.
I've ran two out of three and love the 6.7. Truck was built to tow heavy.
Hard part Suggestions appreciated!

465 ED Turbo
188 220 cam

YoungDiesel27 · 05-06-2017, 11:57 AM

4.88 stroke. I don't understand everyone want to lose the stroke on these low RPM work and street trucks.

59turbo · 05-11-2017, 11:09 AM

The longer stroke gives too much rod angle and puts a lot more stress on the rod compared to a 5.9. I guess it depends on how much power the owner wants to make. If you're spending the money on rods anyways and it's a street truck then I'd prefer the torque of the longer stroke too and maybe not put a quick spooling setup on it to keep cylinder pressures down. A little give and take.

CorneliusRox · 05-11-2017, 11:45 AM

6.7L
The 6.4 might be better for a race truck, but for towing, I'd want that displacement. Low end torque, and spools a large turbo pretty quick.

05-06-2017, 11:45 AM	#1
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	New Build What Direction Well my 06 6.7 dually is no more! I was made an offer I couldn't refuse! So I'm looking for a new 06 Dually 4x4 and going to build another motor! The 6.7 with 5.9 electronics was Awesome. The pure grunt of towing heavy was amazing. So my question is 6.7 or 6.4 I'm doing Carrillo rods either way so same cost. The 5.9 revved great the 6.7 slightly less so would a 6.4 be the best of both worlds? Would love to hear from those that ran all three and their impressions. I've ran two out of three and love the 6.7. Truck was built to tow heavy. Hard part Suggestions appreciated! 465 ED Turbo 188 220 cam __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

05-06-2017, 11:57 AM	#2
YoungDiesel27 Name: YoungDiesel27 Title: Never Enough Time Status: Not Here Join Date: Jul 2010 Location: West Virginia Member`s Gallery Posts: 825	4.88 stroke. I don't understand everyone want to lose the stroke on these low RPM work and street trucks. __________________ EFI Live, HP Tuners, Smarty custom tuning

05-11-2017, 11:09 AM	#3
59turbo Name: 59turbo Title: Diesel Enthusiast Status: Not Here Join Date: Jul 2010 Member`s Gallery Posts: 155	The longer stroke gives too much rod angle and puts a lot more stress on the rod compared to a 5.9. I guess it depends on how much power the owner wants to make. If you're spending the money on rods anyways and it's a street truck then I'd prefer the torque of the longer stroke too and maybe not put a quick spooling setup on it to keep cylinder pressures down. A little give and take. __________________ 2004 2500 Shortbed reg cab 2wd, Goerend triple disc, Fleece holset, BBi stage 1.5, Fleece 10mm cp3, FASS 150. Best ET to date 11.36@120 with firepunk tuning.

05-11-2017, 11:45 AM	#4
CorneliusRox Name: CorneliusRox Title: Seasoned Rookie Status: Not Here Join Date: Dec 2012 Location: Detroit, MI Member`s Gallery Posts: 4,154	6.7L The 6.4 might be better for a race truck, but for towing, I'd want that displacement. Low end torque, and spools a large turbo pretty quick. __________________ Corey - BSME '21 Tesla Model 3 Perf '22 DMax AT4 2500