Signs of a wiped cam lobe??
#4
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I had an older SBC that had two flattened cam lobes and the only real sign was a rough idle. It passed emissions testing and ran fine except for at idle. A vacuum waveform test was how I was lead to the cam having flat lobes.
#6
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I overreved mine one too many times with the old lt4 springs, it knocked the lifter retainer plate of the #1 cylinder. I drove it for another 20 minutes before the 2 lifters got stuck sideways and started grinding down the lobes. It started screatching pretty awful that's when I shut it off. Didn't destroy the lobes just ground into them enough that the cam wasn't worth fixing.
#7
Mine drive fine and idles fine with no popping or back firing...the only prob I have is at high rpms it starts missing and popping... 5800+
Car still went 11.90s shifting at 5700...
i just wanted to see if a worn cam lobe can cause that kind of problem...
I just did a valve adjustment and all of the rockers looked to be moving good...
Car still went 11.90s shifting at 5700...
i just wanted to see if a worn cam lobe can cause that kind of problem...
I just did a valve adjustment and all of the rockers looked to be moving good...
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#9
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I will say that you either have a valvetrain issue or your opti is FUKD up. My bros car had went through 3 different optis last year on the dyno, what a fukn waste of time and it sucked badly. Then finally installed another partsladi opti and the problem went away and the car was perfect. Just like yours it would break up at 5k rpm, the 4th one fixed the problem.......OPtimus prime my friend.
#10
Just installed
Patriot extreme gold Dual springs shimmed to 1.800
No bent push rods and the length is great
1.6 pro mag roller rockers
and 1/4 preload past zero lash
I have been through 3 All Ignition optis, 2 Ac delco optis and now I have a Dynaspark....I am pretty sure it is not the opti...
New coil
New ICM
New Plugs
New Wires
I don't know I am about to set it on fire!
Patriot extreme gold Dual springs shimmed to 1.800
No bent push rods and the length is great
1.6 pro mag roller rockers
and 1/4 preload past zero lash
I have been through 3 All Ignition optis, 2 Ac delco optis and now I have a Dynaspark....I am pretty sure it is not the opti...
New coil
New ICM
New Plugs
New Wires
I don't know I am about to set it on fire!
#14
No it never goes lean at all just starts popping and acting crazy but it will still pull to the shift light at 6400....
Here is a dyno and a pic of the motor in case anyone sees anything I am missing...
#15
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Unplug your d6 box and try a run, dynaspark says not to run one it there unit..just saying. Oh yea another thing are you dropping volts as this is happen could be a problem as well....I'm just throwing stuff out there