whats the point in advancing your timing for the n/a
09-29-04, 02:39 PM
#3
Beat Ninja
Brappity Brap Brap.... 
But yeah, seems like the most logical reason would be for more power.... although i'm wondering what kind of adverse effect it has overall, if any.....
But yeah, seems like the most logical reason would be for more power.... although i'm wondering what kind of adverse effect it has overall, if any.....
09-29-04, 03:03 PM
#7
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Only some dyno time and guess/check work will tell you that.
Only real way to know and do it to its full advantage is to get on a dyno and do a couple base runs, avg them, then advance the timing a couple degrees, do a couple more runs and avg, etc etc, until you hit a plateau.
Most people wont do that, though, because it's expensive for the little amount you get (usually, can make some good power though). A lot of people do it about 10 degrees I THINK as just a general advance.
Only real way to know and do it to its full advantage is to get on a dyno and do a couple base runs, avg them, then advance the timing a couple degrees, do a couple more runs and avg, etc etc, until you hit a plateau.
Most people wont do that, though, because it's expensive for the little amount you get (usually, can make some good power though). A lot of people do it about 10 degrees I THINK as just a general advance.
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09-29-04, 03:23 PM
#8
I live in an igloo
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Im wondering physically how it makes more power.. like does it make the plug fire while the rotor more towards the exhaust cycle, somehow giving it a better boost of power?
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09-29-04, 04:27 PM
#10
trying to build a racecar
No the spark is actually fired earlier when you advance the timing... more towards the intake cycle. You are starting the combustion process earlier in the engine cycle.
The gases (air/fuel mixture) in the chamber (once ignited) expand at the same rate regardless of engine speed. So by advancing the timing you are optimizing that gas expansion for a higher RPM.
You'll want to run high octane to avoid knock.
The gases (air/fuel mixture) in the chamber (once ignited) expand at the same rate regardless of engine speed. So by advancing the timing you are optimizing that gas expansion for a higher RPM.
You'll want to run high octane to avoid knock.
Last edited by Travis R; 09-29-04 at 04:29 PM.
09-29-04, 04:32 PM
#11
knowledge junkie
The re-mapped or standalone/aftermarket ECUs pretty much let you trade more HP for worse fuel economy & 93 octane. This is done by adjusting timing, air/fuel ratios, spark patterns, etc.. to work with an upgraded exhaust & intake system ... or a streetport.
You can gain a bit more with the stock setup, but when 15-25HP is gained JUST by header, full exhaust, & full intake upgrades... why not re-tune the ECU to squeeze even more out. Then you add a street port on top of that & re-tune for that... and you're pushing close to the 200-220HP max a streetable NA can make.
You can gain a bit more with the stock setup, but when 15-25HP is gained JUST by header, full exhaust, & full intake upgrades... why not re-tune the ECU to squeeze even more out. Then you add a street port on top of that & re-tune for that... and you're pushing close to the 200-220HP max a streetable NA can make.
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