can some one please tell me what happens when u advance or retard the timing. and what is better for a n2o or turbo and tell me what the impact is, i mean how it help its each situation
thanks
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advice
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kc2005ptgt
- Former Moderator
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what kind of neon you got?
adjusting a stock cars timing will not help anything - as far as for turbo or n2o... although there are some people on here who have WAY more exp...
if you turbo your stock car you are going to want to LOWER compression - this is why I ask what neon you have - year, model, etc... the rt/acr versions of the neon have a higher compression 9.8:1 I believe, and the others have 9.3:1... a good idea would be to get lower compression pistons and a "turbo" cam. There is also a plate made by a neon guy which actually lowers the compression by one full point, which would be ideal for turbo'ing the car.
IF you get a big aftermarket cam, like say the Crane 14, an adjustable gear and retard timing will help move the power band down a bit since this cam makes all its power up above 7k. However, if you have an RT or ACR the Comp 400 Cam is ideal for this engine because it makes all its power above 5k up to 6800 which is the ideal powerband for the magnum engine...
So to answer your original question.... we need more info. Which I am after reading your initial question, you apparently want to know whether or not you should advance timing or retard it with n2o/turbo. Have I confused you enough??
adjusting a stock cars timing will not help anything - as far as for turbo or n2o... although there are some people on here who have WAY more exp...
if you turbo your stock car you are going to want to LOWER compression - this is why I ask what neon you have - year, model, etc... the rt/acr versions of the neon have a higher compression 9.8:1 I believe, and the others have 9.3:1... a good idea would be to get lower compression pistons and a "turbo" cam. There is also a plate made by a neon guy which actually lowers the compression by one full point, which would be ideal for turbo'ing the car.
IF you get a big aftermarket cam, like say the Crane 14, an adjustable gear and retard timing will help move the power band down a bit since this cam makes all its power up above 7k. However, if you have an RT or ACR the Comp 400 Cam is ideal for this engine because it makes all its power above 5k up to 6800 which is the ideal powerband for the magnum engine...
So to answer your original question.... we need more info. Which I am after reading your initial question, you apparently want to know whether or not you should advance timing or retard it with n2o/turbo. Have I confused you enough??
SOLD 5/13- 2005 Chrysler PT Cruiser GT Convertible | 2.4L Turbo HO | Bright Silver Metallic
SOLD 7/09- 2002 Dodge Neon ACR | Flame Red
The Offical: Sold My Neon Even Though I Swore I Never Would Club | Member #777
SOLD 7/09- 2002 Dodge Neon ACR | Flame Red
The Offical: Sold My Neon Even Though I Swore I Never Would Club | Member #777
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turbodudey
- 2GN Member
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- Location: Phoenix, AZ
Check this out: http://www.fs.isy.liu.se/~larer/Projects/main.html
That should give you the basics of spark advance and timing control.
Ignition timing is all about the timing. Seriously though, for the best possible performance, you want the spark event to occur at the proper time so that the peak cylinder pressure occures when the piston has the most mechanical advantage on the crank shaft.
So, it doesn't really matter how your car is modded, or if your boosted or running N2O. You want to tune to max torque without detonating. Advancing or retarding the timing more or less than this, will only result in a loss of power.
The tricky part is determining what that optimum spark angle is. And it doesn't help that the optimum spark angle is a continuous variable over your rpm and load range. Really the only way to tune spark advance is on a dyno. Sure you can tune on the street (max timing before detonation), but there's no quantitative way to tell if you making more power until you get on a dyno.
That should give you the basics of spark advance and timing control.
Ignition timing is all about the timing.
Seriously though, for the best possible performance, you want the spark event to occur at the proper time so that the peak cylinder pressure occures when the piston has the most mechanical advantage on the crank shaft. So, it doesn't really matter how your car is modded, or if your boosted or running N2O. You want to tune to max torque without detonating. Advancing or retarding the timing more or less than this, will only result in a loss of power.
The tricky part is determining what that optimum spark angle is. And it doesn't help that the optimum spark angle is a continuous variable over your rpm and load range. Really the only way to tune spark advance is on a dyno. Sure you can tune on the street (max timing before detonation), but there's no quantitative way to tell if you making more power until you get on a dyno.
~Josh
'07 Toyota Highlander Hybrid Limited 4x4
'96 Toyota 4Runner Limited 4x4
'07 Toyota Highlander Hybrid Limited 4x4
'96 Toyota 4Runner Limited 4x4
ok sorry to make ur life easyer to help me lol, and yes u lost me. i have a bunch of bolt-ons in my 02 le. non mag, but soon to be a mag. head swap blah blah, anyways then i plan to run n2o with my stock internals, basically whet im getting at is that the only way to see how i can get a gain in performance is to get on a dyno the either advance or retard the timeing then seeing where my gains are?
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