can I realistically get three hundred horse out of a 1st gen pump without major mods? I am planning a cummins repower of my chevy this spring and would like to have a little extra under the hood, so to speak. I plan on opening up things on the intake and exhaust side as well. Any ideas or help would be greatly appreciated.

 

Yes! Follow the pump tuning instructions in the "Tech Facts" section of this site, add a 3200 RPM governor spring (directions in the same place as pump tuning instructions), install a set of Lucas "POD" injectors, swap on a 16 cm turbine housing, and you are right around 300 HP at the rear wheels. Total cost is well under $1,000.

 

Definately add a 4-5" exhaust, the biggest air filter you can squeeze under the hood, and give your wife money to go shopping to keep her happy!!!

You'll understand why when you get a taste of BOMBING and black smoke!!!

Ask anybody here!!!

 

Actually for the exhaust I was planning running dual stacks. A friend has a '02 Dodge 3500 dually and I just love the sound of this truck going down the road. The first generation Cummins are pretty much dime a dozen around here since everyone wants the P7100 pump. Time to start pounding the local wrecking yards for the engine and the rest of the parts. thanks for the help. I'm really looking forward to owning my first diesel.

 

You still need to start with a 4" downpipe at the turbo and run it to the back of the cab until it splits.

 

with the 16 cm housing will i have any problems with turbo lag running a 5 speed trans. my truck will see alot of highway miles and will also be towing a 32 foot camper from time to time. i plann on running 33 inch tires and 3.73 gears in the axles since that is the highest gear ratio i can find for a corproate 14 bolt. any recemmendations on a clutch for this setup?

 

As far as clutch is concerned,switch to the bigger second Gen size (13") When you turn it up with the smaller (12") first gen clutch and pull a trailer of any size, one moment of "lets see what she'll do" and its the begining of the end for your 12" clutch. South Bend clutch seems to have good package/Deals on their stuff

 

I think you might have that backwards. I thought the 1st gens have the 13" clutch and the secnd gens have the 12". I know Joe Donnelly uses the 1st gen sachs clutch and modifys them to hold some serious hp. Correct me if i'm wrong.

 

I'm pretty sure I got it right,
The smaller surface area of the first gen friction disk is not the only determining factor for switching to the 2nd gen clutch. The diameter of the friction disk dictates the diameter where the cushions can be placed. When pulling big trailers (heavy loads) there is a tendancy to rip out the cushions. The 2nd gens 13" clutch allows for a larger diameter to place the cushions and giving them more meterial to push against.
All of these issues are highlighted once you turn up the HP.

 

Yes, I understand the concept of a larger surface area and I have seen the center ripped out of a clutch. I personally know of four 2nd gen trucks with a 12 inch clutch and I know I have a stock 13 inch sachs clutch. Maybe our 5 trucks our freaks of nature, but I doubt it.

 

WHAT BOMBING BUG ?i dont have that at all, i just put around town with my shades on looking cool,,,hey any one want donate o my turbo fund ?

 

The 1st gen definately use a 13" clutch and the 2nd Gen a 12.25 Ive logged over a million miles using stock units grossing 26-28K for most of the trucks life and never a single failure or a slip. I just bought a replacement unit and went with a upgraded 12.25 unit as the price was alot less. I went with the ProGold (350h.p. 700 lbft.)for 325.00 for the kit, so I hope it works as well as the stock unit did. I checked with SBC and they were more money and wasnt to keen on the cheesy material used in the disk hub, although they were very nice to deal with.

 

Well it looks like I'm wrong The size info I was spewing was given to me by a counter person at a local clutch shop. He told me that a 12" for my truck ('92) was $400+/- and if I wanted to go to a 13" I would have to get a flywheel as well. clutch and flywheel $1100. So I am gad to be wrong and would like to know where Mopar2ya got his at.