Casey Meyers

iTrader: (2)

383 tpi had been running nicely for a while. The lifters got noisy after sitting during the winter. When replacing them, i port matched and cleaned up the lower manifold. After getting it back together, it now pings over 3000 and 1/3 throttle. I replaced the knock sensor and esc. Checked continuity from knock sensor plug to esc and is good. I ordered another chip and made no difference. Base timing is at 6*. 10:1 compression and 92 octane. The old lifters had been stuck at full height. I was thinking a burned valve but theres no unusual running. I swapped to a step colder plug with no change. It does run warm, which it always has. It sounds mostly towards the passenger side.

eseibel67

Is there a possibility that the water passage from the front of the pass side head to the intake was partially blocked when the lifters were changed?

rusty vango

as a quick test , you could run some 100 octane racing fuel in it .if the ping goes away, you are on the right track. you might also use a can of seafoam to de carbon things a bit.

Casey Meyers

iTrader: (2)

Im fairly sure the intake is clear. I will try the sea foam because the plugs did have some carbon on them. I want to try higher octane but i cant find any place nearby that sells it. I did verify the timing changed when revved but cant read the decal anymore to see where it is maxing out. Im saving up to switch to a holley avenger but i dont want to swap it and still have the same issue

Orr89RocZ

iTrader: (20)

Whats the timing in the chip??

Joe Tag

iTrader: (4)

A list of ethanol free stations in Pa. some up to 110 octane.
http://pure-gas.org/index.jsp?stateprov=PA

rusty vango

holley tuning tool= BFH !!

Casey Meyers

iTrader: (2)

Ill ask the tuner what my max timing is at. Im going to try sea foaming it and see how it goes

Casey Meyers

iTrader: (2)

The closest place in the gas listing that displays higher than 93 is 100 miles away

Orr89RocZ

iTrader: (20)

Try setting base to 0 deg and see if it goes away

Casey Meyers

iTrader: (2)

Ill see if that helps. I idles much better with 12* base but i would never run it at that

Casey Meyers

iTrader: (2)

i tried sea foaming the engine. needless to say, it is now being rebuilt this winter

ZZ42Fast

iTrader: (2)

Why?

Casey Meyers

iTrader: (2)

ping got very bad and now has excessive blowby. i lost a half a quart of oil through the dipstick tube on a 20 mile drive. it also blows the pcv out of the valve cover if run hard and smokes out of the breather even with the pcv installed

rusty vango

time for a rebuild, my friend.

Casey Meyers

iTrader: (2)

got it all apart. all ring lands were cracked and the crank had also cracked. ditched the tpi and went with a holley avenger

Fred SS

iTrader: (3)

At least you discovered what the problem was. Good luck on the build.

Orr89RocZ

iTrader: (20)

Tune is everything, mail orders usually don't work