Search results

What a job they have.

Yeah, I agree our pop injectors systems are more like gas cycle. You still have some advantage with the diesel fuel having higher octane and longer “burn” , more BTU’s, and much wider air fuel ratio vs gas. So they started tuning the injection and it maybe has a bigger window variation than...

Its definately in the tuning. He talks about the 40 degree crank angle as his rule of thumb for end of the injection zone. Typing out some thinking. Saying it differently.... I'd like to see more detail in the correlation of cylinder peak pressure/ cylinder pressure fall off and crank...

Now he is pushing so much air through the engine I was thinking of the air fill % of each cylinder. He starts talking about piping as a teaser and the bends and routing of the exhaust mainfold and tail pipe size.

Interesting to also think about how balanced or imbalanced each cylinder might affect things. He can estimate cylinder fill % by averaging it over all the cylinders from manifold mass flow rates but not sure he can get that down to each cylinder?

Episode 11 now it's getting a lot more interesting to me. This episode starts to be more similar to a 6.5 build IMO. Now at the end of 11 and what will be 12 he is finally pushing past the easy bolt-on stuff and easy tuning of adding more fuel and needs to start looking at the rest of the...

Yeah, pretty good lesson. Watch Gale banks killing a Duramax and think about the IAT/EGT, injection timing, then oil temp (no. 10 talks about oil temp) and you can gleam the thermal abusive load on the piston. Maybe the piston slop was exaggerated. I believe the place you get excessive...

I like what Will said grade alone pales in comparison to other forces. The manufactures put the cheapest axle they can that will satisfy the weight requirements statically. They don't calculate dynamic loads which would far exceed the static loads. For the most part I think its like ragu its...

clipped.... Will you are just old and are knowledgable. Its like sitting in a training seminar now vs when you were younger. Now we have to sit all day or week depending on the subject to gain something useful and it's usually a better or more a thorough understanding than learning something...

Welcome! Lots of knowledge here for trucks and guy stuff. Chime in when you can. Everyone is here to learn stuff.

clippped Yep Watched 1-9. Neat data capture. I really like the cylinder pressure capture. Having done some heat balance testing for radiator size and engine size it is fun stuff. Snapshot works for power and pressure but temperature takes a while to steady state. That intercooler is...

I surfed Hertz and Enterprise and the 2020 gm trucks don't appear in their fleets "online" yet. I might try and call around and see if they say anything in person. What do you think are the better car pricing services? I like Kelly Blue Book probably the best. I don't like truecar or cars...

Thanks you are right. I actually suggested that to a friend once trying to decide on a tractor - rent one and work it.

Have I mentioned how much I hate car dealers and the game. WT has tilt wheel but LT doesn't unless you add convenience pkg that is pure gotcha to spend more money. Leather requires convenience pkg II A WT actually nowadays satisfies me. Dual-zone AC would be nice but never had it in a truck...

I like how he does say its impossible to predetermine what will drone and what won't. It obviously works per all the comments but what sorta bothers me about the math is each cylinder is at a different phase in time (something like you can't connect 2 non-inverter generators together) so the...

Yeah, I have already lost a lot of sleep on diesel vs gas.

When I look at some sound-absorbing foam it's pyramid-shaped like an egg-crate. I wonder if building a little deeper floor plenum and or airbox and have a pyramid-shaped mesh or grate in the bottom to help absorb the air and sound pulses and under it put a sound-absorbing material or paint like...

My current truck is cloth seats and vinyl flooring. The wife says I should go leather but I am not so sure. Seems there is a conflict with Leather and vinyl flooring when I build and price one. With newer floor mat options is carpet vs vinyl moot? I will probably keep this truck a looonnng...

Considering a new truck. 2020 Chevy ( could go GMC ) 3500 Crw cab LB SRW Dmax My must-haves are pretty basic: Tilt wheel, dual zone AC, and comfortable seat (think I prefer the upgraded 40/20/40 with heat and headrest). Mechanically: heavy duty frt springs, factory gooseneck wiring, bedliner...

I only know a little about sound. It is confusing because some of it is quantitative and some qualitative. I think the root cause is hi compression and only 2 valves. The acceleration of air movement is higher once you start increasing mass of air flow and the noise increases. It's all...