keep the 6.2 or go 454?

[notsosanestan]

Keep in mind a Cummins will be loud as **** and heavy. Plus the extra expense of adapting it to fit.

i dont really care about it being loud the truck i already really loud im just curious how well the th400 would be with a cummins attached to it.

 

[hre513]

i dont really care about it being loud the truck i already really loud im just curious how well the th400 would be with a cummins attached to it.

OK, it is louder than a 6.2. I think the th400 may have came behind a 6bt in step vans, or I may just be thinking of the 4bt.

 

[notsosanestan]

ohh maybe i could score a adapter off one of those things

 

[WyoDeuce]

Depends on if you are driving daily, towing or off roading. The diesel will suck off road in my opinion due to its narrow rpm range. Diesel fans will disagree but I like a gasser in a hardcore 4x4.
A stock used 454 is real common and is only worth $500 at best. The D60 front end in your k30 is worth more than the 454 th400 205 combined. I recently had a 454 rebuilt with new domed pistons and a full ballance job but that will set you back about $3000. The 454 and the 6.2 are so different it is hard to pick one without knowing what you are using the truck for.

 

[DokWatson]

Keep the 6.2 diesel...

Doesn't take horse power to be a hardcore wheeler.

http://www.youtube.com/watch?v=Irs0siSxF6A

http://www.youtube.com/watch?v=6THfMgaY438

Those tires aren't small, and the obstacles aren't as easy as they look.

 

[jimmy-90]

A cummins will die behind a 3spd th400 with 4.56 gears. It will need way higher gears or massive tires to get it to run in the rpm range that it likes to run in. Im dieing to put a cummins in my truck as well and have looked into it a good bit. From what i've come up with it cant be done for any really reasonable price due to the gear and drive train issues.

 

[MuleMac01]

beh 6.2 all the way .....now i had the cance to get that dang th400 out of my m1009 i would!!!...

 

[notsosanestan]

A cummins will die behind a 3spd th400 with 4.56 gears. It will need way higher gears or massive tires to get it to run in the rpm range that it likes to run in. Im dieing to put a cummins in my truck as well and have looked into it a good bit. From what i've come up with it cant be done for any really reasonable price due to the gear and drive train issues.

What if I ran 3:55s and a 36 inch tire?

 

[jimmy-90]

What if I ran 3:55s and a 36 inch tire?

That would help things greatly lol. Have you put those numbers into a gear ratio calculator yet to see about what the top sustainable crusing speed would be? Adding an overdrive trans probly wouldn't hurt either.

 

[notsosanestan]

I might be wrong but I got 3:06 final ratio and 1700 rpm at 60

 

[DXTAC]

Keep the 6.2

 

[palmettopredator]

Part out the other truck and put the money towards your 6.2 and an NV4500 swap. I am chomping at the bit to do it to mine.

 

[bighoss0331]

why dont you swap in a cadillac motor?

 

[The YETI]

Sell the 6.2 and the 454 and build a 383. less heat then the 454 , way more power then the 6.2 and less weight on the front end. and it will bolt in.

 

[notsosanestan]

I am most likely going to part out the truck and get a cummins or turbo the 6.2 still undecided.

 

[The YETI]

What do u use the truck mostly for?

 

[bighoss0331]

if u want to keep the diesel turbo that 6.2 or be that guy and drop a 4-53t.if u want gas do the caddy swap.i swap my 454 with a little head work and a rv cam for a caddy 500 with the same same things done and holy chesty puller that thing is bad

 

[Atwater]

nv4500 in a stock o8 = 18mpg, 454= 8mpg maybe? in my opinion the 6.2 is fine as long as you are not towing/ hauling much. p-pumped 5.9/nv4500 + 3.73s would be just about perfect

 

[USAWEAPON777]

If the 6.2 was good I'd say run it but since it needs work it's really up to you.IMHO the 6.2 is a decent engine I'd fix it and maybe add a turbo. But if ur craving power I can totally understand the 454 if you can swallow the extra $. I dd between a v10 ram and my m1008 so I know where your coming from.