Lets talk about performance engine build

Sled-pulling, Drag results, Dyno results

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Lets talk about performance engine build

Postby redneckroot » Thu Aug 12, 2010 9:56 am

I am looking into building a motor. I have many ideas but figured I would see what everyone else thinks. I'd like to turn it high rpm wise down the pulling track 5,000+. It most likely will be a p pumped motor. What pistons would you run? ?Bored out to? What cam? What valve spring set up?
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby Richie O » Thu Aug 12, 2010 2:17 pm

For 5000 rpm's plus it sure won't be a VE. :D
1989 W250 727, 3.07 L/S, S300, P/S Intercooler, Stans exaust, Pump adjustments, 127k miles,297 hp
1993 W250 extended cab, rag, 4.10 l/s, 6x16's, HTT 62/71/14 piston l/p, Isspro EV series tach, fuel pressure, boost, oil pres, water temp, volt, pryo, 132k/ 301 hp
1992 W250 with NV4500, 3.54's, 16cm 60mm GDS H1C, ground stock cone, Isspro tach, pryo, boost, fuel pressure, slow, rusty, dented,180k
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Re: Lets talk about performance engine build

Postby oldestof11 » Thu Aug 12, 2010 2:20 pm

I am going to prototype a new intake setup for myself when I get the dough for piping. Think split exhaust header type manifold.
Jon
93 D250~ Mismatch of cheap parts, trying to look fast going slow
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Re: Lets talk about performance engine build

Postby redneckroot » Thu Aug 12, 2010 6:20 pm

I want to build the lower the block/rotating assembly to be able to twist some rpms. Pump wise we will see how much more $$ I have at the time. I might put my ve off my 90 on it for next year while I accumulate the funds/parts. I have a complete p pump motor that I picked up for $350 bucks :lol: for the build, plus a bunch of other miss matched p pump parts.
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby ahale2772 » Fri Aug 13, 2010 7:12 am

main gurdle? different rods? big cam? u could go crazy the real question is how much money do u want to spend and how are u going to get 5000 rpms to the ground
84 CCLB W350 project
94' W350 Dually, Diesel, Auto 1080HP/1980FTlbs
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Re: Lets talk about performance engine build

Postby redneckroot » Fri Aug 13, 2010 7:21 am

It will get to the ground not worried about that. I'd like to throw a girdle and studs on the bottom end. More interested in which pistons and cam combo.
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby redneckroot » Sat Aug 14, 2010 10:03 pm

Anyone?
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby pulltilbroke » Sat Aug 14, 2010 10:19 pm

I would run a 155* marine/N/IC style piston and run a 145* injector so you could run A LOT of timing.
90 W250 reg cab, Modified knuder valve, reversed reciprocting dinglearm adjusted, High volume flux capacitor,upgraded whirlygig, A clutch and a hitch
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Re: Lets talk about performance engine build

Postby KTA » Sun Aug 15, 2010 11:57 am

Sure you can gear a cummins to run 5000+rpm but you won't win many pulls with it. The cylinder heads on these engines limit you to the 4000-4500rpm range for the best power curve. One that makes good horsepower but still has enough torque to spin out and lug on the end or heavy sleds. You can cam one to make up for the small head and make power at 5000+rpm but it won't be anymore power than the 4000rpm engine and it will usualy snuff on the big end from excessive cam duration and lack of torque. The turbo/turbos you are going to run would dictate what you need to build.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Re: Lets talk about performance engine build

Postby redneckroot » Sun Aug 15, 2010 6:28 pm

What I should have said is I would like to build a motor that will be capable of turning 5000 rpm. The turbo will be a custom jobber for a 2.5 class.
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby KTA » Sun Aug 15, 2010 6:38 pm

So then why do you need a 5000rpm capable engine in a class that makes its power at 36-3800rpm??? Spend your money on a good head gasket setup, pump, turbo and injectors and you should be really good for a 2.5 class. Custom pistons and girldes are certainly not necessary. Cylnder head work would be your next best money spent, and then a cam.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Re: Lets talk about performance engine build

Postby redneckroot » Mon Aug 16, 2010 7:27 pm

I'm going to have to buy a set of pistons because the engine had a broken ring that put a gouge in the block. So since I'm going to have the machine work done I'd like to be able to throw a different pump and charger on it down the road and compete in a 2.6-2.8 class. You bring up a good point though, what pistons and cam combo would you recommend?
1990 Restored with a bit of aftermarket goodies might be for sale?
1993 ex. cab 2wd soon to be 4wd Newest Project
1998 ex. cab 12v 4x4 now a 5 speed SOLD
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Re: Lets talk about performance engine build

Postby 5.9 Fan » Thu Dec 23, 2010 8:59 pm

You can get it to turn 5k with a gsk and good valvesprings. You need to think about what power level you want and at what rpms you need it. This comes down to cc's of fuel and cfm's from the turbo. Build your engine around the fuel you need and the boost/cylinder pressures that you you'll be seeing. Port and polish head, headstuds, if you are replacing pistons bore it out and run marine pistons so you have the 145* injector angle, good valvesprings, cam, big sticks, girdle if you think you need it, fire rings, benched pump with large delivery valves and aggressive plate. Nitrous will help spool a big charger and keep egt's in check somewhat. If it will live its life 300 feet at a time might as well fill the bottom half of the block with hard block, get rid of the radiator and run a custom water or ice to air cooler. Things get toasty at high rpms under load. I pulled for two years and never pushed it past 4k, 5k in my opinion is just a way for diesel performance shops to brag about who's d**k is bigger. Hope this helps
1990 W250 Regular Cab p-pumped, 022 DV's, 4k gsk, 100 plate, 7x10's, o ringed head, arp studs, airdog, currently under surgery recieving getrag with southbend DD and hx35/40 over s475 twins
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Re: Lets talk about performance engine build

Postby 06cummins59 » Sat Mar 26, 2011 3:56 pm

5.9 Fan wrote:You can get it to turn 5k with a gsk and good valvesprings. You need to think about what power level you want and at what rpms you need it. This comes down to cc's of fuel and cfm's from the turbo. Build your engine around the fuel you need and the boost/cylinder pressures that you you'll be seeing. Port and polish head, headstuds, if you are replacing pistons bore it out and run marine pistons so you have the 145* injector angle, good valvesprings, cam, big sticks, girdle if you think you need it, fire rings, benched pump with large delivery valves and aggressive plate. Nitrous will help spool a big charger and keep egt's in check somewhat. If it will live its life 300 feet at a time might as well fill the bottom half of the block with hard block, get rid of the radiator and run a custom water or ice to air cooler. Things get toasty at high rpms under load. I pulled for two years and never pushed it past 4k, 5k in my opinion is just a way for diesel performance shops to brag about who's d**k is bigger. Hope this helps


Are there any differences from the VE engines and the P7100 engines other than the pumps themselves? Can a P-Pumped VE handle as much RPMs and HP?
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Re: Lets talk about performance engine build

Postby Cnp22 » Mon Mar 28, 2011 10:18 am

Intercooler ve and p-pumed motors are the same I put all my p-pump stuff on my 92 and it held 540hp (prolly 600 with new injectors and dvs never dynoed it tho) for over a year with stock retourqed head bolts at 75psi of boost.
1992 auto, pump mods, 5x16's, 66/74, 8.9 1/8th
1992 getrag, p-pump, 540hp 1300fttq, 8.4 1/8th, 13.2 1/4
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