question about tuning
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Joined: Dec 2002
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From: Tampa, Fl, US
Re: question about tuning (Btothe3rdDegree)
people will use different methods to determine timing, for instance using .75 degrees retard per pound of boost is pretty common but theres also factors such as compression, fuel octane, turbo size, IAT's, etc that play a role.
Joined: Jul 2004
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Re: question about tuning (Btothe3rdDegree)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Btothe3rdDegree »</TD></TR><TR><TD CLASS="quote">nope street tuning, i'll try .75 degrees per pound 
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You should get it on a dyno. Cylinder pressures are higher when your motor is making peak torque then they are when you're not at peak torque. If you took your timing values and plotted them out on a graph they should look sinusoidal, like a cosine graph. Start off higher to help spool the turbo, drop down to prevent detonation around the torque peak, and bring some timing back in as you approach redline.
</TD></TR></TABLE>You should get it on a dyno. Cylinder pressures are higher when your motor is making peak torque then they are when you're not at peak torque. If you took your timing values and plotted them out on a graph they should look sinusoidal, like a cosine graph. Start off higher to help spool the turbo, drop down to prevent detonation around the torque peak, and bring some timing back in as you approach redline.
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