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NV5600 or built 47 auto hold more power?

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Old 06-29-2005, 06:21 PM
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NV5600 or built 47 auto hold more power?

been building my future truck in my head...

been really considering a p-pumped 24v... mainly because I can get a 6sp and disk brakes... I figure the added costs of doing a p-pump swap will offset what it would cost to do a 6sp and rear disk conversion on a 12v truck. and my chances of finding a white QC SB 4x4 in an 01.5-02 are higher than finding a 98.4

my goal is 700-800rwhp. not really concerned w/ drag racing, just want a good highway roller/dyno queen and I love manual trannies...

but if an auto will hold the power better, I may lean that way...

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Old 06-29-2005, 09:06 PM
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6 spd
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Old 06-29-2005, 11:27 PM
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don't forget about upgrading that auto add about $5000 for that. why do you want a 6 speed, a 5 speed will hold the same. it would be alot cheaper to buy a 12v and convert it to a 5speed
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Old 06-30-2005, 07:17 AM
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Manual will be cheaper to go with.
Auto will be nicer to drive around and "FEEL" the horsepower.
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Old 06-30-2005, 07:20 AM
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why would I convert to 5sp? I would just buy a 5sp truck...

I was under the impression a 6sp would hold more power than a 5sp... I would actually prefer a 5sp.

and yes, I would be having the auto fully built... I figure a dual disk and tranny rebuild will cost me a few grand easy... a built auto isn't THAT much more. and if it's going to hold the power better and have a better warranty, I would seriously consider that option.

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Old 06-30-2005, 08:09 AM
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well if i had it to do again, i would have gone with the auto up front. by the time i bought a 6 speed,dual disk clutch, and got the driveshafts right. i could have bought a really nice auto.
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Old 06-30-2005, 08:15 AM
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One of the things about auto's VS manuals is that the manual will need a very aggresive clutch to handle the power which makes the trucks drivability suffer badly.
There are auto's out there holding the power you are talking about. I just got finished building one to hold that kind of power. Now I have to wait and see if he can break it
The trans has the manners of a stock truck until you romp on it then hold on
I have driven some very aggresive clutches and some high HP auto's, no comparison in my mind. Ever backed up a trailer with a 700hp clutch
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Old 06-30-2005, 08:46 AM
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Mike, that's what I'm thinkin'... if I give up on the short bed, it opens the door to a lot of other years to shop from... and since I'd also be giving up the 6sp, why not just do a big bad automatic...

find a higher mile truck that's got a mushy tranny, do the tranny, put a buck-nasty injection pump on it w/ some big injectors, put a disk brake D80 out back and get to work

just don't know if I can give up that "truck" sound/feel, but I think it might be the best way to go in the long run...


a 2 wheel low kit makes parking a big trailer much easier, but yes, I know what you mean!

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Old 06-30-2005, 08:47 AM
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also, MDW,

any distinct advantages to the 47RE vs. the 47RH? the injection pump is getting fully built, so a 160 pump doesn't scare me... and I could probably save some good money by going w/ a 94-95, but if I'm going to be at a disadvantage w/ the RH vs. the RE, I'll go 96+

thanks!

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Old 06-30-2005, 10:37 AM
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The 6 speed will hold a lot more for a lot less and still be driveable. Mine 6 speed is bone stock with only a HMR double disk to transfer the power. It's really no less driveable than a stocker... only a little more pedal pressure. 1500 vs 6000 is a strong motivator IMO.

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Old 06-30-2005, 10:44 AM
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I'm lookin' for 700+ on straight diesel... preferably 800+...

and then water/alky on top...

you gotta factor in the cost of the truck as well...

a 6sp truck w/ rear disks is gonna be a lot more expensive than a 96-98 automatic, then there's the cost of a P-pump conversion and custom injectors vs. just dropping a few grand on a built pump and sick sticks...

figure a $7-8k truck vs. a $13-15k truck... the money saved buys the built automatic, and the cost for fueling mods is less because no conversion is necessary.

adding rear disks seems cheaper/easier than p-pumping a 24v...

I will not swap a 6sp to a 5sp truck... I'll just start w/ 6sp and disks off the bat and P-pump it...

and as an added bonus with the auto, I'd actually be able to make a showing at the drag strip

I really love hand shakers, but...

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Old 06-30-2005, 11:01 AM
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well forrest i keep looking for a 00 to 01 1/2 ton short bed, a cummins will drop right in, and i can keep my power steering,air and cruise. i think it would make a killer street/strip tuck and get great miliage. and since i have a 02 chassis at the house i have all the goodies to make it happen. hey give me a call back, i lost your #
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Old 06-30-2005, 03:12 PM
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Forrest, that built auto for 700+ HP, is a whole lot more than 2K. The Output shaft on the 47RH is beefier than the 47RE. Not sure anyone is making a billet replacement for the 47RH.

If you are even thinking of racing it, do the auto. The 96-98 autos are probably easier to find, but what about an 01.5 auto, with the rear disks.
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Old 06-30-2005, 03:39 PM
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Fred, I'm budgeting $5k for the tranny... I figure an 01.5-02 auto would cost a fair amount more than a 96-98 auto... I figure a rear disk swap would be cheaper than a p-pump swap... and I'm going to be wanting to swap in a D80 with either truck anyhow.

with the 12v, I'll just buy a built pump and some injectors and call it a day... the 24v p-pump sounds like more of a headache each time I look at it.

it's one of those things where you want a manual tranny... and it's a big party till you get up in the 500-600hp range... and then when you're in the 700-800 range, you're thinkin' "man, I wish I had an automatic in this thing"

I love a stick equipped dyno queen, but I'd like to be able to shut some people up at the track too...

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Old 06-30-2005, 04:52 PM
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If you watch and are ready to pull the trigger good built trannies can be bought right. I gave a thousand for the one in my wifes 02 out of a wrecked truck with billet shafts and multi-disk convertor. It only had two weeks on it when the guy wrecked it. I would really like to try a 24v with a p-pump but for now the old 97 is taking care of all my hp. needs plus I think there is a new 6.0 kinda wanting a piece of the old work truck. He don't know the twins are about done and I'm not going to tell him. If I were you I'd go with the built auto and it would be nice to find a weak vp truck to p-pump. I forgot to add,I twisted the shaft coming out of the overdrive off in mine. Guess it didn't like power braking at 30 to 35 lbs. of boost. Good luck Forrest
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