Falling Power Curve @5.5k
08-20-2007, 10:42 PM
#1
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Falling Power Curve @5.5k all right heres the deal guys, at about 5500 rpm my 99 SS camaro starts to loose power, it feels like a slug pulling itself to 6k rpm's.
i jut had it on the dyno because the problem only started happening after my LT/ORY install. the wideband was showing that right at 5500 rpm the MAF started freaking out and the car started pulling timing and the injector duty cycle fell about 15%
we all came to the consensus that i was having some serious valve float issues and that was the cause of all my problems. but i have never heard of a near stock ls1 having problems with valve float.
my mods that i forgot to mention earlier are:
Lid/Filter
Pacesetter LT's
TSP ORY
Flowmaster CB
LS6 intake manifold
P&P Throttle Body
EGR/AIR Removal
and with these mods i put down a meager 326 rwhp & 342 rwtq
Any help would be appreciated, i guess worse comes to worst i will have to buy a cam package, dangit
i jut had it on the dyno because the problem only started happening after my LT/ORY install. the wideband was showing that right at 5500 rpm the MAF started freaking out and the car started pulling timing and the injector duty cycle fell about 15%
we all came to the consensus that i was having some serious valve float issues and that was the cause of all my problems. but i have never heard of a near stock ls1 having problems with valve float.
my mods that i forgot to mention earlier are:
Lid/Filter
Pacesetter LT's
TSP ORY
Flowmaster CB
LS6 intake manifold
P&P Throttle Body
EGR/AIR Removal
and with these mods i put down a meager 326 rwhp & 342 rwtq
Any help would be appreciated, i guess worse comes to worst i will have to buy a cam package, dangit
08-21-2007, 07:26 PM
#5
exhaust is the small valve, it's not gonna hit the piston unless it drops.
I mean, just pull the valve covers and look, odds are something will STICK out at you. I have seen a stock engine with a bent ex valve do exactly what you describe, that's why I posted up.
I mean, just pull the valve covers and look, odds are something will STICK out at you. I have seen a stock engine with a bent ex valve do exactly what you describe, that's why I posted up.