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-   -   How much timing is safe for a dd (https://www.dieselbombers.com/12-valve-2nd-gen-dodge-cummins-94-98/69736-how-much-timing-safe-dd.html)

kmkdiesel 02-08-2011 11:28 PM


Originally Posted by billy-bob (Post 705580)
thanks for the input guys. I already torqued the stockers down to 120 im not planning on it staying together forever but so far so good. making 45 psi with the hx 40. i will check the pressure for the stuble up high too. So my next ? with all that timing, like around 20* do they still start when its cold? im all the way north in jersey its like 5* out rite now

you can get 130+ on the stockers pretty easy, anything past there they start to stretch, i found about 133 to be the magic number

94 12valve 02-09-2011 10:32 AM


Originally Posted by shorty2tall (Post 705657)
so is 22* ok? and what is the tq on the heads?

could be or it could not be. if you go that high just understand that your chances of blowing a HG are higher than at 16*

12vcummins96 02-09-2011 10:37 AM


Originally Posted by 94 12valve (Post 705866)
could be or it could not be. if you go that high just understand that your chances of blowing a HG are higher than at 16*

i wouldnt recommend anything over 17 on stock head bolts

why would you want 22 degrees anyways unless you are making big power its not needed
im only runnin 19 on my truck and putting down 550 with what is in my sig and that is plenty

kmkdiesel 02-09-2011 10:41 AM


Originally Posted by 12vcummins96 (Post 705868)
i wouldnt recommend anything over 17 on stock head bolts

why would you want 22 degrees anyways unless you are making big power its not needed
im only runnin 19 on my truck and putting down 550 with what is in my sig and that is plenty

because everyone thinks the more timing they run, the more power they will make but noone understands the concept of it.

shorty2tall 02-09-2011 10:44 AM


Originally Posted by 12vcummins96 (Post 705868)
i wouldnt recommend anything over 17 on stock head bolts

why would you want 22 degrees anyways unless you are making big power its not needed
im only runnin 19 on my truck and putting down 550 with what is in my sig and that is plenty

idk its a truck im looking at buying has 22* and its got a like 200hp fuel plate and it think thats it for fuel but theres a air dog and cai 4in dp and new clutch and flywheel

94 12valve 02-09-2011 10:47 AM


Originally Posted by 12vcummins96 (Post 705868)
i wouldnt recommend anything over 17 on stock head bolts

why would you want 22 degrees anyways unless you are making big power its not needed
im only runnin 19 on my truck and putting down 550 with what is in my sig and that is plenty

i ran 22.5* because that is where my truck made the most power, ran the best, and got the best mpg.


Originally Posted by kmkdiesel (Post 705874)
because everyone thinks the more timing they run, the more power they will make but noone understands the concept of it.

I'm sure your also aware that timing of the pump is not always the timing after the injector?

BRE 02-09-2011 12:57 PM

Dave would you care to elaborate on that a little? I kinda get the idea of it but would like to know more.

kmkdiesel 02-09-2011 01:24 PM


Originally Posted by 94 12valve (Post 705883)
i ran 22.5* because that is where my truck made the most power, ran the best, and got the best mpg.



I'm sure your also aware that timing of the pump is not always the timing after the injector?

It doesnt matter what the pump is timed at, what spray pattern the injectors have, or what piston bowl you are running, as long as your still spraying in the bowl is what matters, most people with stock pistons, run way to high of timing, im meaning 25*+, your 22.5* is fine because it still sprays inside the bowl.

94 12valve 02-09-2011 03:05 PM


Originally Posted by BRE (Post 705929)
Dave would you care to elaborate on that a little? I kinda get the idea of it but would like to know more.


injector line size, pop pressure, dv holders, plungers ect could change your timing as well. What I'm saying is just cuz your pump is timed at 20* or whatever does not always mean your injecting fuel at 20* BTDC.

12vcummins96 02-09-2011 03:42 PM

very much so dave
i am just sayin that high timing is not needed to make big power


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