That engine sounds absolutely perfect. I don't remember the ones we had running that smooth. Possibly, but we seldom ran them wide open on pumps or light plants. The one on our genset was governed to voltage and frequency and never changed. The pump ran just fast enough to deliver the flow we needed. One of the guys decided to horse around a little by blipping the throttle while I was washing equipment with a 1 inch hose. It took everything I had to hold on, even for a few seconds. I still have many fond memories but they're pretty rusty. You may have noticed that I have a great fondness for these engines.
That's awesome.:) My first exposure to Detroits was at the age of five. My dad owned a small logging company, Hayes HDX 12V71 and two skidders with 4-53's.:) He too loved Detroits and in the day pretty much everything was Detroit. It was those memories that started this Detroit obsession for me.:) Being I drive one daily, I'm always getting my fix.:)
Nice work there. The GMC dealer I worked at had no engine dyno. Had a chassis dyno for the big trucks. Used it to break in inframes and injector changes for extra horsepower. Real noisy to roll a big truck. Had to watch drive tire temp also. We did get big power out of the Silver 92's. Looking forward to your injector change.
After watching Jimmy on your dyno a couple of times I think I finally understand your one hour dyno break-in - it's tough to put that kind of sustained load on him in your truck. But it would be fun trying, huh?😎
Very true, the schedule calls for 2hrs of 80-100% loads. For the break ins on my truck hit the mountain hwys and do several loops. Going to set it up in the shop now so that will save the setup time each run.:)
Knowing CC per injection, rpm and power available should give a direct result in grams/kw/hr for BSFC. Boost is looking decent........still a long way to go to 42psi ( like the modern heavy truck engines) Interesting to see how boost tracks with injector sizes going up. However, for its capacity, it is making good torque, relative to boost.
High boost doesn't get the same result as a 4 stroke engine, fit a pressure gauge to the airbox and see what true charge pressure is. That blower becomes a hindrance at high outputs. On high spec 92s and 149s the blowers were fitted with boost operated bypass valves.
@@raygale4198 Thanks, I'll have the airbox pressure gauge for the next run.:) Right now I'm running the T blower, but will compare the N and bypass blower.:) On my truck I have an N blower that's bypassed at 10 psi.:)
Dang 25 psi is decent, you may have already said it, but what you get for peak EGT’s? It was smoking some, but by no means rolling coal, so that’s nice!
It ran around 900 degrees at 100% loads.:) Some smoke, but just a haze.:) Next injectors will be 9E85's and that will be interesting. I'll run it first without an intercooler to see how much smoke there is.:) Will be adding the Intercooler after that.:)
Not bad at 900, you got some temps to spare…and intercooler will be interesting to see what happens with smoke and egt’s. What injectors did you run in your truck a few months back that ran like poorly?
That engine sounds absolutely perfect.
I don't remember the ones we had running that smooth. Possibly, but we seldom ran them wide open on pumps or light plants. The one on our genset was governed to voltage and frequency and never changed. The pump ran just fast enough to deliver the flow we needed.
One of the guys decided to horse around a little by blipping the throttle while I was washing equipment with a 1 inch hose. It took everything I had to hold on, even for a few seconds. I still have many fond memories but they're pretty rusty. You may have noticed that I have a great fondness for these engines.
That's awesome.:) My first exposure to Detroits was at the age of five. My dad owned a small logging company, Hayes HDX 12V71 and two skidders with 4-53's.:) He too loved Detroits and in the day pretty much everything was Detroit. It was those memories that started this Detroit obsession for me.:) Being I drive one daily, I'm always getting my fix.:)
Nice work there. The GMC dealer I worked at had no engine dyno. Had a chassis dyno for the big trucks. Used it to break in inframes and injector changes for extra horsepower. Real noisy to roll a big truck. Had to watch drive tire temp also. We did get big power out of the Silver 92's. Looking forward to your injector change.
Thanks, that would be something.:) having a lot of fun with the dyno.:)
Thanks for braving the cold to get us this video! I think it got to 44°F here and I about froze to death. Lol. God Bless
Thanks.:) Was a great day with on the Dyno.:)
After watching Jimmy on your dyno a couple of times I think I finally understand your one hour dyno break-in - it's tough to put that kind of sustained load on him in your truck. But it would be fun trying, huh?😎
Very true, the schedule calls for 2hrs of 80-100% loads. For the break ins on my truck hit the mountain hwys and do several loops. Going to set it up in the shop now so that will save the setup time each run.:)
Enjoyed this! I'll be looking for the next video with different injectors.
Thanks, next test is 9E85's, should be a good one.:)
Sounds good, nice job
Thanks, having a lot of fun with this build.:)
Nice. Thank you for the video!
Thank you too!
Knowing CC per injection, rpm and power available should give a direct result in grams/kw/hr for BSFC. Boost is looking decent........still a long way to go to 42psi ( like the modern heavy truck engines) Interesting to see how boost tracks with injector sizes going up. However, for its capacity, it is making good torque, relative to boost.
True, showing progress in the power bumps. The 9E85's will add another 20-30 HP, so we'll see how it responds.:)
High boost doesn't get the same result as a 4 stroke engine, fit a pressure gauge to the airbox and see what true charge pressure is. That blower becomes a hindrance at high outputs. On high spec 92s and 149s the blowers were fitted with boost operated bypass valves.
@@raygale4198 Thanks, I'll have the airbox pressure gauge for the next run.:) Right now I'm running the T blower, but will compare the N and bypass blower.:) On my truck I have an N blower that's bypassed at 10 psi.:)
Dang 25 psi is decent, you may have already said it, but what you get for peak EGT’s? It was smoking some, but by no means rolling coal, so that’s nice!
It ran around 900 degrees at 100% loads.:) Some smoke, but just a haze.:) Next injectors will be 9E85's and that will be interesting. I'll run it first without an intercooler to see how much smoke there is.:) Will be adding the Intercooler after that.:)
Not bad at 900, you got some temps to spare…and intercooler will be interesting to see what happens with smoke and egt’s. What injectors did you run in your truck a few months back that ran like poorly?
adding a charge air cooler will drop the EGT's you won't see any horsepower gains.
Good job!! each test is a step up and a little more data, she's a screamer! lol
Thanks, sure having fun with this one.:)
👍
Sounds like a bus when it idles. She likes to run loaded. Intake air temp would be nice to see on a gauge.
Yeah, sounds really nice.:) I'll probably add charge air temp as well once I get the intercooler set up.:)
drill the exhaust manifold to get a temp per cylinder
Thought you were going to put a muffler on it? 😜
Lol, was supposed to show up last week, but now this week coming.:)
@@grabasandwich
Doesn’t need a muffler… sounds great as is
@@erbthatsright1103 not denying how good it sounds. He said before that the city may shut him down for excess noise
you need to time your fan belts