Engine pinging
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6th Gear
Joined: Apr 2013
Posts: 11
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From: new york
Engine pinging
Just had a 95 in re build with SE 10.5 pistons, 204 cams, tts tuner and fat cats done. Have about 200 miles on the new engine and having some pinging when I accelerate from 4th or 5th gear under load . its pretty slight and only happens when I crack the throttle. My mechanic says to run the bike for about 500 miles then he will dyno tune it. Question, is the pinging normal? I'm using 93 octane Shell gas.
Thanks
Thanks
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Joined: Sep 2009
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From: deland,florida
I agree with scott,if your mechanic was the builder,he should have known this.go with a set of S&S 585,andrews 50,SE 257 or woods 7H cams (among others),but any of these will work well with the 10.5-1 with no detionation (and I would either stay out of the throttle or change the cams now,detionation aint good for a motor,especially HD lower ends)
HDF Community Team
Joined: Jun 2006
Posts: 12,763
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From: san antonio
Listen to Scott and Kirby. Been down that road with the SE204 with CCP near 200psi. No issues during the cooler months in south Texas but when July and August came around and ambient temps were hitting high 90s and 100*+, the ping started. Couldn't take enough timing out to eliminate the ping and still have a strong running motor. A cam change is in your future and I would not try to tune the motor in the current configuration. Change cams and then tune.
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6th Gear
Joined: Apr 2013
Posts: 11
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From: new york
Took a trip to the mechanic who hooked up the TTS tuner. A quick adjustment and I was off and running. No more pinging and the bike runs great. Temps here in NY have been well into the 80's which is when the pinging started. WE'll see what happens in the next few hundred miles.
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Banned
Joined: Sep 2009
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From: deland,florida
keep an eye on your plugs.little black specs on the porcelien is signs of detionation (acctully little pieces of your pistons)
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6th Gear
Joined: Apr 2013
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From: new york
Here is the part # for the pistons
HARLEY-DAVIDSONŽ SCREAMIN’ EAGLEŽ PRO TWIN CAM HIGHCOMPRESSION CAST PISTON KITS* – 3-7/8" - 22661-99A
These high-compression 10.25:1 cast pistons are designed for use in a Twin Cam engine equipped with stock cylinder heads and 3-7/8" cylinders (1550). Piston kit includes rings, clips and pins. All EFI models require ECM calibration (priced separately).
Cams are se 204 part # 25149-00
HARLEY-DAVIDSONŽ SCREAMIN’ EAGLEŽ PRO TWIN CAM HIGHCOMPRESSION CAST PISTON KITS* – 3-7/8" - 22661-99A
These high-compression 10.25:1 cast pistons are designed for use in a Twin Cam engine equipped with stock cylinder heads and 3-7/8" cylinders (1550). Piston kit includes rings, clips and pins. All EFI models require ECM calibration (priced separately).
Cams are se 204 part # 25149-00