6.7 High performance? Tell me what the dealer won't.
#1
6.7 High performance? Tell me what the dealer won't.
I'm the "one percent" in the truck world. (read my sig). I am planning on "Uptrucking" to one of the 5500 series w/ the 6.7 and a manual tranny.
I realize that I have a year to wait, since the quad cab 5500's won't hit the market until spring, '08, but my question is about high performance upgrades for the 6.7.
What's available, and what's in the works? What kind of numbers can you get out of them?
What are the down sides to the 6.7? On another board I belong to, I read doom and gloom over the 6.7's siamesed cylinders, and how they're gonna cause over heating, and higher egt's. Truth?
I realize that I have a year to wait, since the quad cab 5500's won't hit the market until spring, '08, but my question is about high performance upgrades for the 6.7.
What's available, and what's in the works? What kind of numbers can you get out of them?
What are the down sides to the 6.7? On another board I belong to, I read doom and gloom over the 6.7's siamesed cylinders, and how they're gonna cause over heating, and higher egt's. Truth?
#3
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Join Date: May 2006
Location: Pace, FL
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I wouldn't worry at all about the siamesed cylinders. This engine has already been around several years haulin' more weight than most any of us will ever see. Also, I'd take a REAL hard look at the Aisin automatic. It is a fine piece, should easily outperform a G56 and have a taller overdrive to boot. It is not a "new" transmission and already has a proven track record behind it as well. I've driven a 6.7/Aisin combo 3500 Regular CC and it was VERY impressive! You owe it to yourself to at least try one.
#5
I am extremely impressed with the new 6spd auto tranny. The strategy for shifting, downshifting and converter lock up is perfect and on my best day I do not think I could improve it!
I am very, very pleased with the auto and I think you will be too!
I am very, very pleased with the auto and I think you will be too!
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#9
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Aisen
This Aisen will,try 'em both. If I didn't need the Mex.diesel compatability,I'd of ordered a C&C '07.5 auto. Aluminum flatbed and my popup would have been nice. I do like this '07 though.
#10
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Join Date: Jul 2004
Location: Burbank Ca.
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I am a dealer. Ask me!!!
We got our first 6.7 in two days ago. Holly hell what a performer. Once the turbo get fully rapped up the truck takes as fast if not faster than the HEMI. The only thing I didn't like was the shifting of the new 6spd. auto. I drive a 4spd. daily and the shift points felt weird. The upshifts were fine the down shifts were just different. Another strange thing is to pull the shift lever down for low and have it stop at drive. I do like the manual shift switch on the shift lever though.
Don't tell the boss I lit up the tires on the truck a couple of times.
Don't tell the boss I lit up the tires on the truck a couple of times.
#11
We are still playing with it though and that would be flat out awesome if we could use it!
#12
Enough about slush boxes already!!! What kind of numbers are they going to be able to squeeze out of the 6.7?
#13
I am a dealer. I have driven and pulled with 6.7/Aisins and have been very impressed. Hauled two one ton quad cab duallys on our 48' stepdeck behind a 6.7/Aisin and it performed better than any combo I have owned to date, and I have had them all, 5.9/G56/NV5600/NV4500/48re/47re/getrag. Aftermarket performance means little to me, I just want longterm relaibility. The Aisin and the exhaust brake are a hell of a combo to beat, I think it'll be the new standard.
The Aisin will surely hold together as good or better than your NV4500.
The Aisin will surely hold together as good or better than your NV4500.
#15