sluggish off line
 

hey guys i need some advice.i raced my truck the first time this weekend.i got tired of hearing my friends mouth about his 2000 model ford truck.well i blew his doors off!but we dead stopped and when we left he jumped me by a full length,then my turbo spooled up and i went by him like he was in reverse.what can i do to make this thing better right off the line?it's like it really don't start pulling good till the top of 1st or 2nd.i have the star wheel all the way foreward,any suggestions?:humm:

what is your TC stall speed? and when you floored it I'm guessing she was rollin some coal before the turbo spooled? you need to tune your afc and play with your timing.

i'm not sure what it stalls at but it's pretty tight.yes it rolls coal until the turbo spooled.i'm fixin to have the timing set to 16.5*.where would you start on tuning the afc?

well what have you done to it so far? other than slideing it FF and crank the starwheel

that's it,should i loosen it some to make the turbo spool faster?

I would take the afc appart flip washers,change your afc spring, and grind .090 off the back of the barrel. put it back together and hook it up to a supplyed air source ( one where you can adjust your pressure). see what psi the foot stops moving at and use the starwheel as a fine adjustment tool. I have my acf set to fully open @ 40psi with your stock turbo I would try something like 25-30 psi fully open.

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and you don't want lots of fuel down low ... it slows spooling the turbo down

does moving the wheel foreward increase the pressure or decrease it.and wich washers are you refering to?

when you take the 4 bolts off the back of the housing there are 2 washers one has a lip the other is flat ( its easy to see when you get it appart) the one with the lip hits the inner housing and stops the foot from moveing further foward if you swap the washers the foot can move further foward giveing you more top end fuel. cranking the starwheel to the cab is less pressure on the spring moveing the foot faster and throwing lots of fuel down low.

so if i move toward the cab it will prob.spool even slower?

prob will you would be dumping even more fuel down low

Attachment 52164
here is a pic of the washer swap the washer with the lip is on the other side allowing the foot to travel further foward