Well, against my better judgement, I 'encouraged' the pump a bit closer to the head this morning---this is definitely the farthest I've had it and man, what a difference! She's a bit rattle-y now and I'm not sure if maybe I was just used to the timing being back far enough to quiet up the motor and now it's just normal or if it's a bit far...it's not a chevy 6.2 rattle, but noticeable. The gauges give me some great news--boost is down and egt's are WAY down both at cruise and under load. I was repeatedly hitting 35psi+ with lots of heat whereas now I stay under 30 for the most part. Cruise at 65 (1950 rpms) is 450 post and my test grade (4%-ish) only showed 825-850 (post) at 80mph. Lots more seat of the pants feel when boost comes on and with the starwheel almost all the way up, way less smoke unless I load her under 1500rpms. Anyway, maybe I've just finally realized 'normal' timing, but I thought I'd share. If my factory timing marks actually mean anything, they're about the width of a pinky fingernail apart---hows that for scientific?!
greg

 

It's amazing what a day and a half advance in timimg will do.

Bob

 

It is possible that your truck was way too retarded, and the factory marks were wrong.

It is also possible that you will be replacing your head and using a piston as a sieve too.

Excessive advance raises combustion pressure, and can raise piston temperatures. It does make the engine run more efficiently, because more heat is turned into kinetic energy, but it can really take its toll on the piston crowns and the head.

Of course I did the same thing to my 6.2L diesel (advanced the timing heedlessly), and it still runs fine -- the car just happened to roll over into a tree . . .

 

I'd like to check the timing the 'proper' way, but we went from spring to blizzard in about the last six hours, so I'll have to put that off till the weather breaks. Wonder what Bushys timing is--I love his sig----timed at lots

 

..... unless there is a way to set your static timing lower (still above the factory setting though) and have more dynamic advance later in the RPM band were you really need it....

Think about it for a bit.....

pb....

 

Kind of like spark advance on a gasser, whats one of those anyways? I forgot!

 

G1625S....bushy is teasing us...playing the flirt....that was one of the first things i noted on his sig....come on bushy....for a fellow bc'r....it wouldnt have anything to do with those timing advance things we used to put on dual fuel propane systems would it???

you know...when you look at the pool of knowledge available on this site....and the tweaking tips available....and think of the millions of first gens out there running around stock or less than stock....never thought i'd say it...but...the internet rocks...lmfao... vs

 

..... unless there is a way to set your static timing lower (still above the factory setting though) and have more dynamic advance later in the RPM band were you really need it....



hmmm, might it be possible to tap into the ksb in such a way that a crank signal could engage it, say, above 2300 rpms?

 

put a pic of my timing marks in my gallery, if anyone's interested

 

I believe the rotary pumps have an advance mechanism built it (mine made itself know in a bad way) but have not found anyone that has figured out a way to change it. I don't believe the plunger pumps have this feature.
Anyone out there messed with the advance on a VE?
Mark

 

".....bushy is teasing us...playing the flirt....that was one of the first things i noted on his sig....come on bushy..."

vagabonddreamer, I wouldn't do that...honest .
In any case it's something to ponder....I can tell you it is not the the dual fuel method....
It is something that works fairly well and .....well.....it does work, lets put it that way...

pb.....

 

well, that clears things right up

guess its time to study up on the Kung Fu of the VE

 

If I knew I'd tell everybody. C'mon Pastor, quit holding out on us.

 

PASTOR!!! if WANNA...is asking even EF HUTTON would answer.... i believe it is your solemn duty now....to bestow upon we of the unwashed masses...your timing secret...where in bc are you anyway???? so if you dont tell us...i will egg your house for the benefit of the entire forum neighbourhood!!! vs