Proper timing
Being that i am turboing this weekend, hopefully, do you think that the 8.5BTDC is a good one considering fuel will be increased? I am probably going to crank the fuel with the turbo in so turbo'ers, 8.5, 8? Id like to do this once!! Really wishing i had a MT480 or similar. Would make my life easier! haha
>>>>>>>>>ford idi turbo engines should be set at 3.5 +/- 2deg.<<<<<<<<<<<<<
Maybe the PSD but not IDI turbo........
Diesel Don's info
If you have the original emission label on your valve covers, they gave the max pump fuel flow rate in mm3 at rated HP.
As I recall 6.9 was about 48mm3 sea level and 44mm3 for high altitude pump
7.3NA was about 54mm3 and 49mm3 for high altitude
7.3 IDI Turbo - 58 mm3 ( this is out of the Ford book )
Optimum timing: 6.9IDI ( Ford method ): .5-1.5 degrees ATDC
6.9IDI ( Navistar method ): 6-7 degrees BTDC
7.3 NA: 8-9 degree BTDC*
7.3 IDI Turbo: 8-9 degrees BTDC*
Anything above these, the engine get's pretty noisey.
* helps engine starting. Original timing was 5-6 BTDC and engine cranked a long time ( at least in comparison to 6.9 ) before starting.
he must of used a luminosity meter and set it ATDC.that's why you don't see a larger number like 8.5 -9.5 BTDC.
you must have good fuel up north.my timing seems perfect at 6 ATDC.
2.5 degree's more advanced, made a BIG difference to my engine.
you can't trust those marks a whole lot either.i barley "bumped" mine and tighten down the bolts and it changed it a whole degree!
2.5 degree's more advance "freed" my truck right up.like its lot more free flowing down the road if you will.also more grunt off the line.
ever since i had my custom exhaust built it seemed to kinda load up before exhaling a little when i talked to her pre-hill.doesn't do this at all now.just pure zooooom.

wreck,
another thing i noticed,is that when i didn't go by the elevation/cetane chart and just tried coping what others claimed worked good for them,i didn't notice any loss of power when i retarded it back a couple degree's.
so if you had it 2 degree's advanced,and he set it on the $ for ya,by retarding it,this would explain why you didn't feel anything.
however fuel economy and your engine/glow plugs will be happy if this is what happened.
if you were retarded 2 degree's,id be surprised you didn't feel the 2 degree's more advance though.
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2.5 degree's more advance "freed" my truck right up.like its lot more free flowing down the road if you will.also more grunt off the line.
ever since i had my custom exhaust built it seemed to kinda load up before exhaling a little.doesn't do this at all now.just pure zooooom.

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i guess 2 degree's advance wouldn't do a while lot for a tired ip.so that probably explains that.sounds like your in nice shape now.
if them dang bolts were easy to get too,id tell ya to retard that new ip by 2 degrees,since you have a meter and i bet you'd see it then(not to keep t there of course! lol,just as a test to see how much 2-3 degrees really makes with a healthy ip.)that's the worse part of the whole job.i see and understand how to rig up a custom wrench to make that easy next time though.im going to retest it once it's well known,we're switched over to summer blend/#2 again.it's NICE having the meter hey.
or did he place a pulse line on the injector line?
what cylinder did he use?
if he timed your truck with the pulse adapter and set the meter to read 3.5 degree's BTDC then your engine would....holy crap i don't even know what retarded timing so extreme like that would sound like.but im sure the engine would feel like mush!
you need to go back and tell him to set it at 8.5 BTDC.some guys claim 9 and even some claim another half advanced is good.
personally,if your running standard fuel,and not high cetane stuff.then stick to 8.5
either way,3.5 BTDC is wrong,wrong,wrong lol.

so,if you were 2 degree's off advanced according to him and you had more rattle,then you were still retarded @ 5.5 BTDC and still BAD lol.
had he advanced you 2 more degree's from 6.5 to 8.5 you would have felt that and would be here telling us how bad you were by ear.

you need to head back and ask for at least 8.5 BTDC.
you will now be going from 3.5 to 8.5,so be prepared for a LOT more engine rattle! and a LOT more power!
if you saw him use a lumy probe,then did he measure your fuel? if not,forget him or tell him to use the pulse adapter.

p.s
imho,the engine should never smoke black.this is de-tuned rather than properly tuned.
my engine has some nuts with all my mods combined now,and 0% smoke.
enough so,id like to have her dynoed to see if i couldn't best the top N/A recorded on OBN of 143.9 hp/261.3 trq.i dunno if it would or not,but i must say,i wouldn't be surprised in the least.

"Maybe that's because I got used to it being retarded and quieter."
the engine or exhaust? this is throwing me off actually.you say you have more engine rattle? if so,then he must have used the lumy probe and set your engine @ 3.5 ATDC from 5.5 ATDC if this is the case.elevation,and cetane rating,could have been right or too advanced to start with.there is NO "one setting fits all" timing setting when it comes to using the lumy method.i learned this real fast.
im going to test all my glow plugs now as a result lol.

well if he did set ya at 8.5 BTDC then your good.
i know how ya feel about the extra engine noise.
im finally going on a long haul tomorrow with her.
im not crazy about the extra rattle either.the only part i don't like about this.it's been all year being used to much quieter in the cab.
i guess we'll get used to it.
it's motivated me to start looking for one of those thick factory firewall sound damping mats like i saw in a pic of snapons truck.
she's gunna need it.many hours on the road tomorrow.rarely all interstate too though.so i guess we'll just turn up the radios wreck lol.hey,good thing you just got a new one.you'll be using it a lot lol.
) to have it timed 'cause time(no pun intended) seems to be tight nowadays. I really wish I had more time to play around with those kinda things but life gets busy, anyway. On the sound mat thing, Oreo has one too, and for me - it didn't sound any different once I got it off the firewall. I did switch from n/a to turbo so I understand that the sound changed a little. But if you plan on turbo'ing soon, it's really nice to hear the turbo winding up upon acceleration anyway. The turbo isn't loud at all - just sounds like music to my ears.







