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pinging??

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Re: pinging??

Postby BuddhaZ06 » July 4th, 2013, 4:00 pm

Well I've had several different tanks of gas. No Dillon's though. I have more compression with these heads now, maybe the tune is off cuz that? It's not high compression or anything. Just more than previously. Plugs were brand new. Possibly knock sensors aren't plugged in or something but I never messed with them while I changed heads or anything. My tuner is in kc so I'm trying to figure out if it's tube issue before I drive up there
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Re: pinging??

Postby Verybaddad » July 4th, 2013, 4:23 pm

I bet its the compression , you may have to pull some timing with the tuner and it may stop. I have also heard of people pulling the heads off and using thicker head gasket. I'm not a fan of doing that. I would just play with the timing. Drop it a little at a time ,1 or 2 degrees at a time . You want as much timing as you can get without the pinging , when you find that sweep spot you will know it.
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Re: pinging??

Postby Nexus » July 4th, 2013, 4:58 pm

my truck does the same thing. though not quite as bad. We where thinking Bad knock sensor or to much timing as well
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Re: pinging??

Postby Bullitt117 » July 4th, 2013, 5:02 pm

I'd bet on it being because of the higher compression for sure.
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Re: pinging??

Postby 5bites » July 4th, 2013, 5:27 pm

If the timing is right you don't really need knock sensors.
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Re: pinging??

Postby RazorbackMustang » July 4th, 2013, 5:35 pm

Verybaddad wrote:I bet its the compression , you may have to pull some timing with the tuner and it may stop. I have also heard of people pulling the heads off and using thicker head gasket. I'm not a fan of doing that. I would just play with the timing. Drop it a little at a time ,1 or 2 degrees at a time . You want as much timing as you can get without the pinging , when you find that sweep spot you will know it.

Galen beat me to it. Increased compression combined with a smaller cam right? You have more static compression now and more dynamic compression due to the smaller cam. Pull some timing and it should stop.
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Re: pinging??

Postby Turbo » July 4th, 2013, 5:40 pm

Try a colder plug make sure it's non protruding electrode. pinging is pre ignition and it will cause the temp to rise sharp edges in the chamber can cause it but to much timing is the most likely problem if 91 and 110 don't stop it you need a tune
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Re: pinging??

Postby Bullitt117 » July 4th, 2013, 6:17 pm

its the same cam. different intake and different heads. Ill bet anything its because of the higher compression.
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Re: pinging??

Postby RazorbackMustang » July 4th, 2013, 6:59 pm

Oh, thought I read in the build thread it was a little smaller cam.
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Re: pinging??

Postby 5bites » July 4th, 2013, 9:10 pm

Bullitt117 wrote:its the same cam. different intake and different heads. Ill bet anything its because of the higher compression.

It probably is due to the higher compression but it needs the timing adjusted accordingly.
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