Ok i just bought a new to me 12 valve yesterday. It is a 1994 model 4 wd single cab 5 speed with 80K original miles. I have owned a 2009 model, 2001 model, 2004 model, and a 2006 model but never a 12 valve. The truck is in new like condition. It had had some work done that i will list but i have no idea where to go next with the truck. The goal is 500 hp and thats the max i want. It has a southbend clutch, cold air intake, 5x14 injectors whatever size that is, number 10 fuel plate, 913 pump with extensive pump work with delivery valves worked, stock turbo. It smokes like a train and has pretty good power but i am not sure where this puts me as far as how much power i have now and what i need to do to get to 500hp. Please forgive me for being dumb about all this but the 12 valve seems to be a different animal than i am use to so i need educated. Thanks
New to 12 valve please read and help
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http://www.cumminsforum.com/forum/9...ssion/314312-beginners-thread-read-first.html
First thing to sort out is the KDP,
What cold air intake do you have?
Change the fuel filter
You have way too much fuel for your stock turbo, you need to slide the AFC as far back as possible and tune some of the fuel out. Those injectors are way too big with even a stock pump. Add to your list to find out what DV's you have, you most likely need to swap them to get it to smoke less.
Need to sort out gauges also, EGT, fuel pressure, boost
The stock turbo is good for ~350hp unless you push it past 35psi which is not recommended. I will let someone else suggest a turbo for 500hp
First thing to sort out is the KDP,
What cold air intake do you have?
Change the fuel filter
You have way too much fuel for your stock turbo, you need to slide the AFC as far back as possible and tune some of the fuel out. Those injectors are way too big with even a stock pump. Add to your list to find out what DV's you have, you most likely need to swap them to get it to smoke less.
Need to sort out gauges also, EGT, fuel pressure, boost
The stock turbo is good for ~350hp unless you push it past 35psi which is not recommended. I will let someone else suggest a turbo for 500hp
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Super b special for 5x14s. Its a tried and true setup. Also cheaper that an A4K
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Personally I think I'd go with the FMW 62, it's 62/68 and I'd get the gated .84 T4 turbine housing. Can be had for around $1000, but it's not quite a drop in deal. You'd need a T3 to T4 adapter for the manifold, and far as I know it comes with a hose discharge on the compressor housing, so you'd need a new IC pipe. Should spool really nice with your fuel and still flow pretty awesome up top.
As far as drop in your best bet would be a 63/68/12 gated. Might still need a downpipe depending on whose turbo you go with but that's not a big deal. Either of these would make 500hp and both would spool quicker than the SuperB Special, although it's a great option too. I just hate lag, so even a little quicker spool is good in my book.
As far as drop in your best bet would be a 63/68/12 gated. Might still need a downpipe depending on whose turbo you go with but that's not a big deal. Either of these would make 500hp and both would spool quicker than the SuperB Special, although it's a great option too. I just hate lag, so even a little quicker spool is good in my book.
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