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Location:
sunny coast, qld
Registered:
October 2002
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stock ignition timing and new cams
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Wed, 23 March 2005 10:00
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Hi guys,
I am looking into getting some 264deg cams for my 1jz-gte. I have a wolf 3d but the mechanic who installed could not make it do timing as the stock ecu needed the crank angle sensor to make the auto change gears. So my question is: how important is it to be able to change the timing when you are running longer duration cams?
The reason I wasn't that fussed about this was that I have been told by a couple of people that the standard ignition map is very good and there is minimal gains to be had by changing it eg. SIko1j is making big power with stock ecu. Also, it would retain the standard knock sensors.
Thanks in advance
Chris
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Location:
sunny coast, qld
Registered:
October 2002
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Re: stock ignition timing and new cams
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Thu, 24 March 2005 02:23
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anyone?
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Location:
Wollongong
Registered:
May 2002
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Re: stock ignition timing and new cams
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Thu, 24 March 2005 07:05
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Dunno if this'll help... but it shows differences between cam types on a JZ.
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Location:
Brisbane
Registered:
October 2002
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Re: stock ignition timing and new cams
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Thu, 24 March 2005 23:55
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i know that on atmo cars u really need a few more degs advance when u put new cams in, cause it basically changes the usable rev range upward.
but i dunno about boosted cars, since timing actually retards when boost comes on,
if u put larger cams in, you will actually lower the dynamic compression of the motor, until you over some that with more boost, ah fuck, i dunno hey 
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Location:
sunny coast, qld
Registered:
October 2002
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Re: stock ignition timing and new cams
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Fri, 25 March 2005 22:11
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thanks guys. I think I will give the cams a miss for a while then. See how it goes with the stockies first.
thanks
Chris
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