6.0 VS 6.7 Cummins

SaNnDnSurF · Oct 17, 2011

Silverback said:
A friend of mine has a QCSB 4x2 and it runs 14.1 at 101 with just a tune and exhaust. I'd assume a 4x4 wouldn't have an issue running high 13s with a good launch

Your talkin 6.7? Idk much about em.

Silverback · Oct 17, 2011

SaNnDnSurF said:
Your talkin 6.7? Idk much about em.

Yeah, they're basically big displacement 5.9 CR's with a vgt turbo

Jason · Oct 17, 2011

Buddy of mine has one that's tuned. '07 ccsb with a big 100gal fuel/toolbox combo, etc. Stop light to stop light it's kinda meh...but from a roll, and top speed on the highway look out..that thing has some steam up top...I held him off tip about 75-80, and he damn near ran over me from behind.

Silverback · Oct 17, 2011

Jason said:
Buddy of mine has one that's tuned. '07 ccsb with a big 100gal fuel/toolbox combo, etc. Stop light to stop light it's kinda meh...but from a roll, and top speed on the highway look out..that thing has some steam up top...I held him off tip about 75-80, and he damn near ran over me from behind.

They're a typical cummins, boat loads of top end

SaNnDnSurF · Oct 17, 2011

Nice Kill
http://www.youtube.com/watch?v=6X0y_BLAu-k

estrada5.9 · Oct 17, 2011

Silverback said:
They're a typical cummins, boat loads of top end

Aren't the inline six engines known for low end torque? In general.

Fords I-6 300 c.u. gas motor. For those who have driven one.

Over the road trucks I-6.

I-6 Cummins

I drove a 6.0 6spd, seemed to like the rev's, mostly top end and thats why they seem slow with a standard tranny because you may not shift up that high in normal driving.

Cummins engine seem to have much more low end due to there design. Hence why he pulled away when it shifted to over drive and dropped the rpms down and pulled harder.

5.9 Cummins is 4.02 with a 4.72 stroke makes for a good low end due to better leverage on crank and other factors.

4.21 and 4.88 for the 6.7 Cummins

3.74 and 4.13 for the 6.0. PSD

4.11 and 4.18 for the 7.3 PSD

3.86 and 4.13 for the 6.4 PSD

3.90 and 4.25 for the 6.7 PSD

As the bore gets closer to the stroke in size the more the engine favors higher rpm. As it gets closer to over square the more the top end increases.

Under square would be bore smaller than stroke.

A good over square example would be a 327 sb chevy 4.00 bore and 3.25 stroke those engines love to rev.

Of course tuning can help with the feel of the engine but by design I-6 has the advantage.

3brorce · Oct 17, 2011

SaNnDnSurF said:
Nice Kill
http://www.youtube.com/watch?v=6X0y_BLAu-k

that 6.0 is two wheel drive. The guy in the 6.7 didnt even put his truck into four wheel drive for some reason

01PSD · Oct 17, 2011

that 6.0 has 190s LOL

STRAIGHTSTROKEN04 · Oct 18, 2011

He has more than that LOL real nice truck.

fordboy11 · Oct 18, 2011

Ya more like p-max and some go go juice LOL

Stroker04 · Oct 18, 2011

His truck is wicked. I love watching his WOT roll from like 30mph I keep it on replay everytime I watch it LOL

STRAIGHTSTROKEN04 · Oct 18, 2011

Its definitely a fast truck.:ford:

Worstenemy453 · Oct 20, 2011

A 6.7 we did here at the shop with just deletes and H&S mini maxx did 410ish and over 1000 i believe on the rollers. Our truck on Extreme Street studded, intake and exhaust did 410 and 820. So it would be close if your tires werent so high. Just going off rough average numbers.

Mdub707 · Oct 20, 2011

Yes their HP is usually a touch lower but their torque helps. HP is just a function of tq anyways.

I'm pretty sure a stock 6.7 and a stock 6.0 dyno about the same HP.

SaNnDnSurF · Oct 20, 2011

Mdub707 said:
Yes their HP is usually a touch lower but their torque helps. HP is just a function of tq anyways.

I'm pretty sure a stock 6.7 and a stock 6.0 dyno about the same HP.

Interesting

MUDSTROKIN' · Oct 21, 2011

Don't be scared of it, I have an 05 on 37s and raced my buddy with a 6.7 dpf delete and smart and pulled on him same story he had 33s. But I have a 6 speed. Once I hit 4th gear I was long gone. Another friend of mine has a 6.7 on 37s same set up and I completely embarrassed him. All on canned tunes on my sct. Go give him hell