SETTING FOR TIMING AND HOW MUCH TO TURN UP FUEL?

[wood350]

my timing is as i am told retarded a few degrees will timing it back to normal show any improvement in power also will i get more power by advancing it if so how much. i also want to turn up the fuel at the IP how much shoulf i go without burning up my motor thanks for the help

 

[MTIDI]

NO!!!! I picked my truck up from the shop today (took it to have it timed) and they timed it to 8.5 deg (or so) with a 20 deg offset. it was a few deg retarded and it made a huge difference!!!!!

very quick throttle response!

 

[spencnaz]

If you turn up the pump, YOU MUST GET A PYROMETER ON THERE FIRST! You can quickly over fuel and turn the engine into a combination blowtorch and highspeed milling machine.

 

[deanj]

Have the timing set 8 - 8.5 deg. DONOT turn up the fuel untill you have a pyro installed. Melted pistons can be a real pain.

 

[wood350]

i will have the pyro by the time i get all this done if i do get it done and it runs close to 1250 what should i do turn the fuel down a little bit? also how much should i tell the shop to turn up the fuel thanks for ur help. and is $75 a good price for timing and turning up fuel

 

[Freight_Train]

Let outta the pedal.....

 

[spencnaz]

Stop running it balls up and you won't melt the motor down.

 

[icanfixall]

That price is fair for what they are going to do. Turn the internal adjustment 1 flat of the allen wrench. Don't bottom the adjustment out or the pump can be damaged. Don't run it hotter than 1150 deg. Most here will only run up to about 1050 and call it good. Aluminum melts at 1225 deg or so.

 

[jauguston]

Icanfixall,

Where did you get those numbers? Hypermax told me my 6.9 could run 1250 degrees all day long. I just got back from a 1900 mile trip and pulled some loong hills at 1200+ with the propane on - 13 psi boost - no problem.

Jim

 

[towcat]

Icanfixall,

Where did you get those numbers? Hypermax told me my 6.9 could run 1250 degrees all day long. I just got back from a 1900 mile trip and pulled some loong hills at 1200+ with the propane on - 13 psi boost - no problem.

Jim

jim-
1250 is a commonly understood number for meltdown on aluminum. what isn't discussed often is the PLACEMENT of the pyro is critical to whatever number you choose to run at. the closer your pyro is to the heat source, the higher number is OK. The second thing to consider is no two automotive gauges read exactly the same. Aviation gauges is a whole different animal in accuracy and $$$. With those two items in mind, where you run your temps at can be very different where someone else is running at. Just keep in mind, once thermonuclear meltdown occurs....there's no turning back.

 

[icanfixall]

Banks states it for motor health and long life. As towcat describes the location of where you are taking the measurement is critical. I will run about 1050 to 1100 but not for long. None of us really know where our pyro gages are reading on the accurate meter. Why push it to the meltdown limit. But wait.... Its your motor not mine. I haul very expensive horses all over the U.S. and Canada. Getting there is much more important than how fast I pull that hill. I build for the long haul and not the short run. Yes, it would be fun to heat things up till they melted down just so I knew what that number was but thats expensive.

 

[Exekiel69]

Also aluminum will melt at 1250 alone but You also have the oil nossel's squirting oil directly on the aluminum piston so the difference for distance from the piston to the gauge sensor could mean that 1250 from the sensor is also Your real limit. I also run it up to 1100 a few times but I don't feel to confortable with it so I just back off the pedal.

 

[towcat]

keep in mind guys the racers/pullers are hitting 1850 on a run...but only briefly. And yes, I have seen melted tops from overfeuling before. That is not where the problem is. Its when the stuff cools and sticks to the cyl walls and start clogging up rings. Now you really have a problem.

 

[Freight_Train]

Not to mention that Aluminum is a strange thing.Unlike steel or iron aluminum gets harder and more brittle the hotter it gets.It is like glass when you get close to it's melting point and will shatter real easy.

 

[Black dawg]

turbo or no?