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Old 12-09-2010, 10:25 PM   #1 (permalink)
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400hp build ?

I've been talking with a local cummins certified diesel mechanic about building a 400+hp p-pump 12v. He says with proper engineering, he can make it run like a factory engine, as far as egt's, smoke, etc. The engine I'm starting with is basically a core, so were talking total rebuild. He's quoted me for sleeving and boring the block, rebuilt head with valve job and hardened studs&90# springs, oil pump, water pump, bench tuned for 400hp rebuilt injection pump&injectors to match, and rebuild kit. 9600 in parts,1600 in labor. So my questions are, is this a decent price. And any recommendations on a company that builds a good solid 47rh that can handle amn engine like that.
Any epxerience apprecciatted! Doug
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Old 12-09-2010, 10:39 PM   #2 (permalink)
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for tranny look a dave goerend. this is what i would do for 400hp. sdx90hp injectors, 62/65/12 turbo, 4k gov., take the plate out of fuel pump, head studs, heaver exhaust valve springs, marine head gasket, tune the afc housing. fix the kdp. that setup should put you over 400hp maybe 500hp and set your pump timing to 16 degrees
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Old 12-09-2010, 10:47 PM   #3 (permalink)
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$10k plus in an engine...for 400 hp??

you could get a junkyard engine and with very little mods and a good turbo you could easily hit 400hp and have it tuned in to run as clean as a stock motor. motor would easily last 500k miles

heck I could detune my motor to 400hp and gove you my whole truck for $10k
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Old 12-09-2010, 10:58 PM   #4 (permalink)
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$10k plus in an engine...for 400 hp??

you could get a junkyard engine and with very little mods and a good turbo you could easily hit 400hp and have it tuned in to run as clean as a stock motor. motor would easily last 500k miles

heck I could detune my motor to 400hp and gove you my whole truck for $10k
^ That's what I was thinking. I would source out all your options first using that 10K budget. You could potentially buy a whole truck for that so is it worth 400hp and do you need 400hp that bad? I've built a few motors though not diesels but to me Its a bit steep in my opinion for what your getting (I could be wrong) On the plus side its a completely new motor and you will know what's in it from the get go. Seriously 10K plus
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Old 12-09-2010, 11:00 PM   #5 (permalink)
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Really shooting for the moon, aren't ya?

I'm gonna go out on a limb and say that you can tune a stock 215 pumped truck to 400HP without the help of any big budget items.

Governor springs, no plate, AFC tuned properly, and a clutch to hold it all together and you'll be knocking on the door pretty hard.
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Old 12-09-2010, 11:16 PM   #6 (permalink)
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just look at the mods in my signature and i only spent 300 dollars.
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Old 12-09-2010, 11:35 PM   #7 (permalink)
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Ill sell you my whole truck for $9600 and it did 540hp on 370's now it has 5x16's. That's just alot of money for nothing I did 389 in my old 96 with a clutch, tuned pump, and stock tightend gov springs. It's a good thing you came and asked first!
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Old 12-10-2010, 12:53 AM   #8 (permalink)
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Really shooting for the moon, aren't ya?

I'm gonna go out on a limb and say that you can tune a stock 215 pumped truck to 400HP without the help of any big budget items.

Governor springs, no plate, AFC tuned properly, and a clutch to hold it all together and you'll be knocking on the door pretty hard.
Bingo. I'm over 400 with youre recipe and cheap injectors. Little smoke, no EGT issues.
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Old 12-10-2010, 01:26 AM   #9 (permalink)
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Thanks for all good feedback guys.I know only a few mods are necessary to push a p-pump 12v up to 400hp.I'm talking about buiding an engine from one I bought used that had been overheated with around 100,000 miles on it.It's going in an 89' suburban project truck that I already have a 93' 12v ve pump in and running, this engine only has 70,000 miles on it, not even an oil leak yet, so I don't wana start turnin up this engine. So I decided to build virtually a new engine from the p-pump core I bought.I was told the engine was shut down as soon as it got hot but I see antifreeze stains all over on block underneath exhaust manifold, so before I go trying to make big power in a truck that I want to be very reliable I figure I should start at the bottom. I'm just not that skilled with the internals of an engine, so I'm looking for some feedback on anyone with experience with a good trust worhty engine builder I can have build a good reliable 400hp 12v engine in the nothern CA, southern OR, or western NV area? Once again, I appreciatte all thefeedback
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Old 12-10-2010, 02:56 AM   #10 (permalink)
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go on craigs list and look for an engine with under 100k on it and thats basically brand new...400 horses honestly costs nothing at all to do
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Old 12-10-2010, 09:26 PM   #11 (permalink)
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Im thinking it would be best for your situation to find said used motor and then build that. OR, you could go a different route with that overheated motor by taking the head off and taking it down to the machine shop to have it checked out for cracks or warp. IF it checks out good the bottom end should be just fine, its the head that will go belly up due to heat before anything else. Then you can have them do some head work or just bolt it back up with ARP hardware, marine gasket and heavier valves. It would be much cheaper either route then having the whole motor rebuilt just because, but Im sure the machine shop would love to make the money on it.
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Old 12-10-2010, 09:36 PM   #12 (permalink)
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go on craigs list and look for an engine with under 100k on it and thats basically brand new...400 horses honestly costs nothing at all to do
shoot, you could just buy any of these members trucks like they said for less than 10k and over 400 hp and part the rest of the truck to make a lot of your money back. 10k is way too much for a rebuild and 400 hp. just buy an engine on craigslist and go from there.
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