8070 questions

Hey all new to forum bought an 8070 this spring rebuilt fuel pump rebuilt injectors new head job took it to local Jd dealer put it on dyno was 160 hp we set it at 200 hp y'all think it'll bo ok

It's a power shift fwa using it to pull a manure tank

Does it get hot when you work it? Have excess "puffing" blowby? Excess oil consumption?

We used the dyno ourselves it held at 1000 rpm motor runs good no excessive blow by pullin manure rank ain't hard except on grades

It's got a little over 4000 hrs on it don't know if bottom end had any work on it liners looked good didn't think 200 would be to much on it held pro at rated speed hasn't been runnin hot at all though haven't loaded it a whole lot

Is that not the same motor as in the 4w220

Personally, I would leave it at no more than 170 Hp, that's enough for that engine. If you need 200 Hp, find a 200 Hp tractor.

Forty years ago, I had a wise old Cummins Instructor tell me this: every engine is designed to consume "X" gallons of fuel before it's time to overhaul it. Now, do you want to burn all those gallons of fuel in 10 years or 5 years??? "

DrAllis wrote: Forty years ago, I had a wise old Cummins Instructor tell me this: every engine is designed to consume "X" gallons of fuel before it's time to overhaul it. Now, do you want to burn all those gallons of fuel in 10 years or 5 years??? "

That's a pretty wise statement to go by.

4600 gallon top spread

Biggest problem I have with this whole thread is that it was only putting out 160hp, and nobody thought to figure out why it was low. If pump and injectors were just properly serviced, it should have made at least the factory rating of 170hp! A lot of times the fuel is turned up to cover up a poor state of tune issue. If at proper tune, and just pulling that wagon, it should be fine at 200hp, since you aren't demanding 200 hp all day long, but it has it on the rare occasion it needs it. I always recommend to put a pressure gauge in the intake manifold and check boost while on the dyno. Was it smoking heavily while only delivering 160? Did you ask the pump shop to set it different than stock? Are you 100% sure the injectors are in the correct way? Lots of guy put them in backward since it's easier to get the returns on, but it results in the spray pattern being totally wrong.

Edited by injpumpEd - 25 Nov 2016 at 8:06am

If it were mine on the dyno at 160 with a fresh fuel system I would be looking awful hard for bad turbo, a bad intake gasket, rotten fuel hoses, or a bad new injector. It should be at least 170 if everything is up to snuff.... It seems one hole is lacking something.