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kasperflipped
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PostPosted: Mon May 16, 2005 1:09 pm 
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hey all,
ive just finished reading this post and im sure id find it even more informative if i knew what the hell pinging was!! so could you please help a not so mechanically minded person out and explain what it is!! thanks
trent :?

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min13k
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PostPosted: Mon May 16, 2005 1:23 pm 
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when you give the motor a gut full and you hear a nocking or pinging sound
makka

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drmini in aust
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PostPosted: Mon May 16, 2005 2:12 pm 
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min13k wrote:
when you give the motor a gut full and you hear a nocking or pinging sound
makka

It's a "tinkle tinkle" sound heard mostly at low revs (under 2500) when you give it full throttle.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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gafmo
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PostPosted: Mon May 16, 2005 5:44 pm 
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best way is get her goinmg at around 30 Mile and put your foot to the floor in 4th...You may hear it

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Mick
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PostPosted: Mon May 16, 2005 8:22 pm 
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Location: Under the bonnet son!
I thought my Yamaha R1 would be the peak of hi tech engine management stuff, but even it can't get away from the crap fuel we sometimes get fed.

When it pings (usually only when very hot and with less than perfect fuel) it's like someone is bashing my engine with ball pien hammers. Can't miss it (or the semi in the rear view mirror).

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Rupert
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PostPosted: Mon May 16, 2005 8:50 pm 
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Just talking to Fred Sayers and he and Graham Russel are both in agreement that max advance should be 28 to 30. Any ideas on this?
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drmini in aust
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PostPosted: Mon May 16, 2005 9:42 pm 
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Rupert wrote:
Just talking to Fred Sayers and he and Graham Russel are both in agreement that max advance should be 28 to 30. Any ideas on this?

Probably about right, for a near stock motor.
My last 1310 (bathtubbed chambers, flat top pistons, 10.4:1 C/R & RE-13 cam) ran at 41*.
I didn't believe it either- double checked it- but every time I knocked it back a degree or two, it lost power.

Graham R says yeah, open chambers DO need more advance, but the higher the C/R the less they need.

Greig Malaure's Nb race car runs about 37*.
My current 1360 is running at 40*. Same head... 8)

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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9YaTaH
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PostPosted: Mon May 16, 2005 10:28 pm 
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Proud of you Doc....Greig Malaure's Nb race car runs about 37*. :wink: :wink:

I find it truly amazing that people are achieving such high power outputs from the venerable old A Series AND reliably :!: ....sweet 8)

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drmini in aust
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PostPosted: Mon May 16, 2005 10:32 pm 
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9YaTaH wrote:
Proud of you Doc....Greig Malaure's Nb race car runs about 37*. :wink: :wink:

I find it truly amazing that people are achieving such high power outputs from the venerable old A Series AND reliably :!: ....sweet 8)

And without need of `hair dryers'.. :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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