24v P pump build not running right

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BigSilver

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Jan 17, 2015
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Hello all, my buddy recently p pumped his 24 valve and had some other work done by a less than reputable builder well say. Pump that's on it is a 180 with full cuts and bigger holders, 5k springs, and no afc. Has a 63mm charger, fass 200, #110 valve springs, bigger injector lines, honed out 150 horse injectors, and a 196/215 cam (don't exactly recall those numbers but I know that's within a couple digits. We believe the timing is set at about 29°. This truck does NOT run like it should and no help from the builder. From a launch it takes off okay then falls to its face between 2 and 4 grand in every gear. The powerband is so on and off it's almost sporadic and hard to describe. It's not like a switch going off but you can feel it almost like when a stock pump would start defuelung. We know the manifold is cracked which steals about 15lbs of boost from the top end, and we think it has too much timing Although these issues are definitely not helping, we don't think they're the root of the issue, and are pointing fingers at the cam and or its installation. Any advice would be much appreciated cause I can't figure it out myself. Thank you.
 
whats your fuel pressure doing when the truck acts up? who built the pump? what are you using to control the fuel shut off lever?
 
Fuel shutoff is cable operated, fuel pressure I would have to ask about but I assume is good, pump is a stock 180 with the parts put in it, however I think it's been *****d around so could be something internally with that but doesn't look like barrels were turned or anything which I though could be a possibility.
 
It smokes black the whole way through the rpm range so I assume it is getting enough/too much fuel. My course of action was going to be fix the boost leak set timing at like 20° and see where were at with fuel then maybe hook the afc up and turn it down some if needed.
 
from the description in the original post it has a ton of fuel, more than is needed
 
Yes definitely a surplus of fuel. We hope to start working on it this weekend so I'll start with all the easy stuff and see how that goes first.
 
jlbayes said:
from the description in the original post it has a ton of fuel, more than is needed
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Exactly. Which makes me wonder if the GSK is cutting fuel when it shouldn't. If it even has and actual 5k set in it.

Of course the cracks are not helping. LOL
 
That's definitely possible cause that's almost exactly what it feels like I remember before I put my springs in.
 
I'm going with gov springs also they aren't that much and not too bad to install!!
 
Ditch the full cuts and get the afc back on and working.
 
when you have no AFC you can put out the fire if to much fuel comes on before you spool up, and I run 22 degrees due to HO pistons
 
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