any thoughts on the laggy-ness of the truck ( i know it's turbo charged, and there's a lot of piping to boost, but it seems it takes a bit to really get the truck going, but once it hits boost it TAKES OFF! lol)

I'm not complaining, just wondering if there's something i can do to get a bit more low-end, or so... i have adjusted the starwheel, and if i tap the accelerator it will puff smoke, so i know there's fuel down low.. of course, i suppose i should keep in mind it IS after ALL a 7400lb truck...

just wondering if there's something maybe i'm not doing right...

plate 3/4 forward (100 plate
AFC forward
starwheel about 25 clicks forward (about 1/2 way gone from view)
AFC spring tension screw (on back of AFC) loosened

of course, if when the boost hits it takes-off-like-a-freight-train is normal, then i'm ok..

just time for a GSK...

comments appreciated...thanks guys!

J

 

Your governer arm is probably to low.

 

Interesting...

i did check that when installing the plate, and it seems that it hits at the VERY bottom of the curve on my plate... i think if it was .010-.020" lower it would be beneath the plate...

isn't this about where it's supposed to be? i thought?...

J

 

It should be just below the tip of the hook on the plate. About the the thickness of the plate on the governer arm.

 

slide the plate all the way forward, adjust the lever arm up... but yeah, single turbos hit pretty hard w/ a good amount of fuel, so it feels really soft compared to the hit of the turbo

 

Forrest,

it seems if i adjust the lever arm up, it will place it in the upward fueling curve, not at the bottom...

it's just hitting the very start of the curve (bottom-most part of the plate) now..

all the way forward.....there goes the EGT's...

i can already leave a smoke cloud across 4 lanes of traffic if i hammer down...

 

if you move the arm up, you'll get into full fuel sooner...

go full forward, if EGT's get nuts, it'll inspire you to get a turbo

have you bumped the timing? that helps out a good deal on egt too

 

U might wanna try pushing your AFC full forward, I had the same problem with the arm that ur describing, but it was riding under the plate, now i have it at the tip of the nose of the 100 plate, when its at WOT, but my AFC is full forward as is my starwheel,

ID suggest getting a GSK first, then try loosening up a little on the wheel and AFC, see what that does..

Rick

 

Advanced timing drops low rpm response. Advanced timing is an advantage once it gets rolling.

Loosening the AFC screw hurts. That is a no boost fuel adjustment. It needs to be about 2-3 turns past contact.

GSK will really drop the low rpm response unless you bring the governor lever way up or dump the #100 and go to a #0 plate. GSK slows the lever from rising into the fuel curve on most anything but a flat plate.


It takes fuel and rpm to get the turbo moving air.

 

John,

by AFC screw, do you mean the screw that is at the back of the AFC housing, closest to the firewall, or the starwheel?

a GSK will make it terrible down low? such as 1200-1600?

thanks.

J

 

AFC screw is the one on the back side of housing (toward firewall). It pushes on the diaphram.
Star wheel is star wheel.

GSK slows the governor lever coming up. If the lever is well below the curve on the plate you have to wait for enough engine RPMS to get inot the fuel.

 

Personally, if he has a 215 pumped truck with a 100 plate, and is having low RPM sluggishness...I would almost bet he's got a little too much fuel.

Is your wastegate working properly? Not hanging open or anything?
Chris

 

hmmm...

maybe i'm just not used to the way the truck should feel stock, as it never really was, as i fixed the boost-reference line to the AFC at the same time i installed the plate and guages.

i suppose i should take a ride in a stock truck, and go from there...

it just seems like when it hits boost (at about 1500) the truck takes off like a train (and smokes like one too...lol )

i wasn't sure if the power is supposed to go up exponentially, or if it's supposed to be more linear...

J

 

sounds about right... a stock truck just never really hits! LOL!

 

cool...

i'm gonna fine tune a few things, as i go...but the GSK is next, as well as the HD valve springs at the same time...

and a turbo upgrade, eventually....