12sec.5.3

iTrader: (1)

Don't know what happened to my other post.
But anyways,
I'm wondering if the radius valve job on my heads could be messing me up. The air to fuel ratio is correct, and timing is at 26*-28*. I don't know what else could cause my hp to fall at 5300rpm's.
For whoever was wondering, the pulls were on a Dynojet.

white1

iTrader: (5)

Cause its a Turd

white1

iTrader: (5)

Nick suggested to me that your fuel pump could be causing the issues. What pump are you running? Hows your Injector duty cycle looking?

onebadrubi

What intake manifold? Truck manifold, this could most likely be your problem.

white1

iTrader: (5)

Mine seems to keep pulling after 5200 even with the truck manifold. Hopefully we can see a graph tomorrow

12sec.5.3

iTrader: (1)

I don't believe it's the truck manifold because I know too many people running it with no problems. I have a Holley 255 intank fuel pump. 30lb injectors @ 59 psi is like 36 lb'ers. No starving there. Didn't make a log since the dyno cause I see no reason for it. Pretty sure the tune is correct since it was done by a performance shop. The only thing left is hard-parts.

white1

iTrader: (5)

You need to get your truck some better head

Sport Side

iTrader: (6)

How about the cam? Which one are you running? Any track times?

2002C5COUPE

iTrader: (3)

What kind of cam and valve springs?

Could it be valve float?

12sec.5.3

iTrader: (1)

224/226-58x/57x-114 custom FMS cam with 918 springs. Best time to date is 12.74 @ 105 w/ 1.79 60'. Same pass I broke 3 teeth off my ring gear and finished off my rearend. I was having some wheel hop issues.