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Old 23rd October 2006, 18:20   #1
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I'v changed my Zen's engine engine timing from 10 degrees to 12 degres.

Apart from the slight overheating, is there any other REAL long term flaw that it can cause?

the engine feels great tho (running 91 octane)
fuel efficiency has gone up bout 5-8%

cheers,
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Old 23rd October 2006, 18:44   #2
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and yea, its a carb zen
cheers,
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Old 23rd October 2006, 21:17   #3
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KNOCKING.....but since you are using hi octane, you should be OK.

How did you change the timing....in the dristributor?
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Old 23rd October 2006, 21:22   #4
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It will not cause overheating, as thermal efficiency will rise. But it will definetely cause mechanical overloading of parts eg bearings, head bolts etc which may fail prematurely. But if you are not revving it and not driving at high speeds, then if may be OK
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Old 23rd October 2006, 22:53   #5
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Quote:
Originally Posted by Mpower
KNOCKING.....but since you are using hi octane, you should be OK.

How did you change the timing....in the dristributor?
yep thru the distributor.

thanx tho... i thought of giving it a shot since higher octane fuels available easily now-a-days... will let u guys know how it goes

cheers
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Old 24th October 2006, 12:19   #6
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Quote:
Originally Posted by jat
It will not cause overheating, as thermal efficiency will rise. But it will definetely cause mechanical overloading of parts eg bearings, head bolts etc which may fail prematurely. But if you are not revving it and not driving at high speeds, then if may be OK
umm...there is quite a bit of revving involved usually...

anything else i shud know?
cheers
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Old 24th October 2006, 13:19   #7
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Quote:
Originally Posted by Rice_tuner
I'v changed my Zen's engine engine timing from 10 degrees to 12 degres.

Apart from the slight overheating, is there any other REAL long term flaw that it can cause?

the engine feels great tho (running 91 octane)
fuel efficiency has gone up bout 5-8%

cheers,
Hi,

To the best of my knowledge a stock carb zens ignition timing is between 5-7*. You can advance the ignition timing to about 10* if you are running 97 Octane.

There will be no damage as such but it is best to set it at a timing which gives you the best performance and no knocking/pinging. Whike you are at it make sure that your carb is well tuned and A/F mixture is set correct.

Viper
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Old 24th October 2006, 20:48   #8
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Quote:
Originally Posted by viper
Hi,

To the best of my knowledge a stock carb zens ignition timing is between 5-7*. You can advance the ignition timing to about 10* if you are running 97 Octane.

There will be no damage as such but it is best to set it at a timing which gives you the best performance and no knocking/pinging. Whike you are at it make sure that your carb is well tuned and A/F mixture is set correct.

Viper
the timing on a stock zen is bout 9-10 degrees.

i need to get a carb tune up... are u gnna be at mahesh's machine shop anytime soon?

cheers
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Old 24th October 2006, 22:21   #9
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Quote:
Originally Posted by Rice_tuner
umm...there is quite a bit of revving involved usually...

anything else i shud know?
cheers
Knocking happens at low revs too, like when you lug the engine when youa re in too high of a gear.
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Old 24th October 2006, 23:06   #10
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Quote:
Originally Posted by Mpower
Knocking happens at low revs too, like when you lug the engine when youa re in too high of a gear.
yea.. i'm totally aware of that...my post was directed towards someone saying that its ok if i wont be going to hard on the engine...

cheers
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Old 23rd September 2009, 11:08   #11
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Rice_tuner,

how is your Zen going on with increase degress? Are you still running with this setting?

Have you tried any new stuff?

Will be good to know....
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Old 24th September 2009, 09:51   #12
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As long as the engine does not knock you should be Ok.
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