I got my 97 ddec 4 60 series rebuild last year with a oem inframe rebuild kit and oem injectors...currently have pai ceramic coated manifold, bw 75mm turbo, kn intake filter, 5inch straight pipe.... the mechanic who rebuild the motor said its turned up to 475 / 500 and that it wont last long if turned up to 550?
60 series max reliable hp?
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Turbrospeed, Jul 1, 2021.
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Well there is alot more to it. What series is it. Does it have piston oil squirters? Did he install updated drilled rods? Press on wrist pins, or bolt on?
Any reputable tuner can guide you in the right direction.Rideandrepair, Swine hauler and spsauerland Thank this. -
A GK60 can run a long, happy life at 550hp if tuned correctly and driven responsibly. Around 600hp is about the max I like to go with them because of the lack of piston cooling nozzles but that's with and injector upgrade.
jamespmack, Rideandrepair, little cat 500 and 3 others Thank this. -
What do you do that you need all the HP? My s60 is 435/475 I think, and I haul 43000 thru PA down to SC, lots of hills, then north up the middle to Ontario and dont have a problem. I'm told that tune so understresses them my engine should go 1.5mil no sweat?
Rideandrepair Thanks this. -
What I'm getting at is sometimes it's nice to have more than just the bare minimumbroadsword, spsauerland, Rideandrepair and 2 others Thank this. -
You keeping up with the maintenance of that K&N filter? I know 2 people that have dusted motors for lack of keeping those expensive pos filters sufficiently wet with oil.
Last Call and Rideandrepair Thank this. -
jamespmack and Rideandrepair Thank this.
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I would like to put my truck on a dyno to see exactly where she is at. Even though the mechanic said that i have such power, that could be false since i didnt really see them doing it. I have a scan gauge and boost only goes up to 31.5 psi, it also tells you the hp of the motor, before the inframe i saw up to 480hp on cruise up a steep hill.
Now I have only seen just a bit over 300hp, Scan gauge has the same settings as before. Truck tends to lose momentum when rpms dip under 1300 on a steep grade going 70mph plus with a 10k or less load.... dry van all steel wheels with 295/75/22.5 tires.
I use to run continental hdl super singles and a 10 speed...i change to a 13 speed because i had no overdrive on that 10. Was doing 65mph at 1600rpm on 11r front tires.
In the rear I have steel inner and aluminum outer wheels on some crap thailand trazano 295/75/22.5 tires (bad invesment) which am itching to change out for some all positions for a smoother ride.
Right now i have 2.9 rear end, doing 70mph at 1280 rpms due to the 13spd, might be thinking of putting maybe a 3.5 so i can cruise at 65mph around 1400Last edited: Jul 3, 2021
Rideandrepair Thanks this. -
Some late model years GK blocks are drilled for oil squirters all you have to do is add them. I even had a GK with them. But idk if they were factory or added. Then we built a BK with drilled rods.Rideandrepair Thanks this.
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