Alright guys here is a brain tease for you.
I have a 86 mustang LX with the 5.0. Tore off the heads, intake, took out cam. Redid the top end of the motor.
Edelbrock pedestal mount alum. head has 1.90 intake.
Performer Intake
Double roller timing chain
edelbrock roller cam .498 lift
Bottom end is stock bore with 331 stroker kit on it. No the car was bought like that. I dont know what was done with bottom end. (going with what i have been told by the previous owner) Guy stroked it using the stock pistons which are flat tops with no valve relief.
Before tear down on motor it ran very strong. Now I have everything back together fire it up, and there is a chatter from the top end. Its not a lifter sound, lifters werent noisy before tear down. Its a tin type sound, its hard to describe. Its not a rod bearing that has a distinct sound. Now before you say its valves touching the pistons, I talked to a edelbrock tech for almost a hour, he said the heads I have now will clear the stock flat tops. The way it sounds, when it idles and runs fine is valve to piston slap, but its not loud and engine has no problems turning over. Im at wits end, I checked all rockers, stock rockers for now till i cure this problem. I checked the timing, i redid the torque down sequence on the rockers. Even my friends who are musatng gurus were stumped as as what it really was. But now if you give it alittle gas, it bck fires and has no power. To me that would sound like a timing problem and no firing order is HO firing order i made sure it was right, am i right to think that, yet i put the gun on the motor and its dead at 10 btdc. Any other things i am over looking? If it is timing issue what is the ticking noise then? Solutions?
I have a 86 mustang LX with the 5.0. Tore off the heads, intake, took out cam. Redid the top end of the motor.
Edelbrock pedestal mount alum. head has 1.90 intake.
Performer Intake
Double roller timing chain
edelbrock roller cam .498 lift
Bottom end is stock bore with 331 stroker kit on it. No the car was bought like that. I dont know what was done with bottom end. (going with what i have been told by the previous owner) Guy stroked it using the stock pistons which are flat tops with no valve relief.
Before tear down on motor it ran very strong. Now I have everything back together fire it up, and there is a chatter from the top end. Its not a lifter sound, lifters werent noisy before tear down. Its a tin type sound, its hard to describe. Its not a rod bearing that has a distinct sound. Now before you say its valves touching the pistons, I talked to a edelbrock tech for almost a hour, he said the heads I have now will clear the stock flat tops. The way it sounds, when it idles and runs fine is valve to piston slap, but its not loud and engine has no problems turning over. Im at wits end, I checked all rockers, stock rockers for now till i cure this problem. I checked the timing, i redid the torque down sequence on the rockers. Even my friends who are musatng gurus were stumped as as what it really was. But now if you give it alittle gas, it bck fires and has no power. To me that would sound like a timing problem and no firing order is HO firing order i made sure it was right, am i right to think that, yet i put the gun on the motor and its dead at 10 btdc. Any other things i am over looking? If it is timing issue what is the ticking noise then? Solutions?
