by KTA » Thu Nov 20, 2008 7:22 am
Yeah Bill it is funny. I wonder how many here have built Scheid, IRP, or Thunder in Muncie winners? I have 6 1st's alone. I am not trying to tell anyone what to do, I am just offering my vast experience in building power and breaking parts. Over the years I have broken 8 Np205 output shafts including 2 of the improved Pro-fab ones, I have broken 6 of the Nv241 split tailhousing output shafts, 2 of the NV241 one piece tailhousing output shafts, and 0 NV271 output shafts. I have blown a planetary out the side of a NV271, but that was because of trying to boost launch an automatic with too much boost. I have also taken the gear teeth off the gears in a NP205, and pushed the aluminum bearing covers off as well. I have NEVER broken a chain in a NV241 or a NV271. The NV271 is a much stronger case than the NV241 from the 2nd gens. I havent even found one to be stretched even after 300+ hooks. The only chains I have ever seen failed in one of these cases was because it didn't have oil, or had been run low on oil and gotten hot. Sled pulling isn't rock crawling, and gassers don't run anywhere close to the same gears as diesels. Most diesels pull a 13-15:1 final ratio. Most all the gassers I know are running 20-25:1 or higher. That means the diesel see about twice the stress with the same power. That is my 1st hand experience, not what I heard or read or someone said.

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.