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-   -   timing relevent to larger nozzles (http://www.competitiondiesel.com/forums/showthread.php?t=201748)

SixOhh 12-20-2018 10:40 PM

timing relevent to larger nozzles
 
To make a short story long, i had a friends 06 that had flux 6's in it with a stock he351 (for the time being)

a few years later we are doing a complete build now....

6.7 fuel, todd's wild pump as a single, s369sxe
all of zacks head work pistons and hard parts... 188/220, big valves, bench work, rods, side intake, balanced bottom end, etc etc

as far as fuel i had him at 1400 u.s. wot and near stock timing... he is going from 125% to 200% overs with a lot more fuel and a lot more air...


All things considered, i plan on firing it off on the oem file for break in and then going from there.

My main concern is how timing is affected with so much fuel and air moving way faster off idle and how that affects timing with a larger nozzle. Of course we are going for less duration, but this is normally way more motor that what i normally tune. To be frank, most of my tuning work are DDs with stock internals with small fuel upgrades. Ive never tuned a motor with this much head work and higher compression pistons.... how will the higher compression affect timing?

Am i just being a worry wart here? run it on a stock file with all injection events from the get go or give it a smoothed out base file with no post injection and stock timing?

There is a lot of money in this build and i just want to be safe.

Ultimately, i would sub this work out to Les or Dom, but i am here to learn.
i will not have dyno access for a while after the build and this is why i am asking,
thanks for your input gents,

-M

SixOhh 12-20-2018 11:32 PM

sorry the cam is a 178/208 if that matters.

Dom_c13b 12-21-2018 11:00 PM

What are you planning on turning for rpm?? Hopefully 4500ish to make it fun?

JWhite 12-22-2018 01:57 PM

I wouldn't fire it on a stock file. But that's just me

SixOhh 12-31-2018 07:30 PM

Quote:

Originally Posted by blackmega3500 (Post 2688809)
I feel safe at 27* lol.... 29* and I'm frisky.... anything more for me just gets expensive in many ways.

i dont bring any trucks past 28* without time on the rollers.

maybe i should have been clearer, i am not concerned about WOT timing but the timing on the way there so to speak. how is timing affected in that Daily driving range 20-50mm3 ish. with such a large injector?

SixOhh 12-31-2018 07:31 PM

Quote:

Originally Posted by Dom_c13b (Post 2688957)
What are you planning on turning for rpm?? Hopefully 4500ish to make it fun?

it should be built for whatever! he just picked up a nice girdle and it has been balanced! at least 4k for now or let her eat dominic!

SixOhh 12-31-2018 07:32 PM

Quote:

Originally Posted by JWhite (Post 2688996)
I wouldn't fire it on a stock file. But that's just me

please explain why? because of stock timing or stock fuel delivery?

JWhite 12-31-2018 11:04 PM

Quote:

Originally Posted by SixOhh (Post 2689886)
please explain why? because of stock timing or stock fuel delivery?

Idle pressure needs bumped, stock main timing would probably be ok, but main pulse / quantity and pilot qty should be addressed

SixOhh 01-02-2019 07:35 PM

makes sense. les already had me bump the rail up to like 82-8500 psi last time to clean these same injectors up at idle.


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