Timing and building boost
08-12-2002, 10:33 AM
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Timing and building boost
I think i read that to build boost faster, you would retard timing a bit... or is it better to advance timing?
Let me clarify, i meant to say which would help the turbo spool faster?
[Modified by bmm89, 4:48 PM 8/12/2002]
Let me clarify, i meant to say which would help the turbo spool faster?
[Modified by bmm89, 4:48 PM 8/12/2002]
08-12-2002, 10:53 AM
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Re: Timing and building boost (bmm89)
I have my timing at stock and then retard it 1/4 degree per lb of boost.
I know for a fact advancing it would be a bad thing
I know for a fact advancing it would be a bad thing
11-21-2004, 06:04 PM
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Re: Timing and building boost (Del_Slowest)
its ok to advance vacuum timing, but ur not going to see any difference. If u advance timing during boost you risk detenation. what setup r u running?
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11-21-2004, 06:15 PM
#8
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Think about it from a scientific perspective.
What spools a turbo? A: the rapidly expanding gases caused by combustion. IE Heat and Pressure.
What do you get when you retard timing? A: Higher EGTs.
Combine those two statements, and retarding the timing should cause the turbo to spool faster comparatively to a tune that has more timing.
Whats the draw back of course? A: Power.
What spools a turbo? A: the rapidly expanding gases caused by combustion. IE Heat and Pressure.
What do you get when you retard timing? A: Higher EGTs.
Combine those two statements, and retarding the timing should cause the turbo to spool faster comparatively to a tune that has more timing.
Whats the draw back of course? A: Power.
11-21-2004, 06:28 PM
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Re: (Bryson)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bryson »</TD></TR><TR><TD CLASS="quote">Think about it from a scientific perspective.
What spools a turbo? A: the rapidly expanding gases caused by combustion. IE Heat and Pressure.
What do you get when you retard timing? A: Higher EGTs.
Combine those two statements, and retarding the timing should cause the turbo to spool faster comparatively to a tune that has more timing.
Whats the draw back of course? A: Power. </TD></TR></TABLE>
dude, you get higher egt's bc your fuel isn't being burnt, and it's going into the exhaust and combusting. yeah, lets all retard our timing so that we can spool our turbos faster. this one is going in my sig for sure
What spools a turbo? A: the rapidly expanding gases caused by combustion. IE Heat and Pressure.
What do you get when you retard timing? A: Higher EGTs.
Combine those two statements, and retarding the timing should cause the turbo to spool faster comparatively to a tune that has more timing.
Whats the draw back of course? A: Power. </TD></TR></TABLE>
dude, you get higher egt's bc your fuel isn't being burnt, and it's going into the exhaust and combusting. yeah, lets all retard our timing so that we can spool our turbos faster. this one is going in my sig for sure
11-21-2004, 06:50 PM
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Re: (Del_Slowest)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Del_Slowest »</TD></TR><TR><TD CLASS="quote">
dude, you get higher egt's bc your fuel isn't being burnt, and it's going into the exhaust and combusting. yeah, lets all retard our timing so that we can spool our turbos faster. this one is going in my sig for sure</TD></TR></TABLE>
That is ALSO another factor in high EGTs, But non-the-less NOT the only reason.
I'm not reccomending anyone to retard timing to increase spool time...nor did I say anything that would even hint at that in my first post.
Take 2 setups. Both with a 14.7 AFR. One running 30 degrees timing, and another at 20. What is the difference in EGTs? you tell me.
dude, you get higher egt's bc your fuel isn't being burnt, and it's going into the exhaust and combusting. yeah, lets all retard our timing so that we can spool our turbos faster. this one is going in my sig for sure</TD></TR></TABLE>
That is ALSO another factor in high EGTs, But non-the-less NOT the only reason.
I'm not reccomending anyone to retard timing to increase spool time...nor did I say anything that would even hint at that in my first post.
Take 2 setups. Both with a 14.7 AFR. One running 30 degrees timing, and another at 20. What is the difference in EGTs? you tell me.
11-21-2004, 07:05 PM
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Re: (Bryson)
to decrease spool time, i'd say to increase timing. Increased timing up to a point means more torque. As the cylinder is traveling down with more force and increased speed because of the increased torque, the cylinder traveling up on its ex. stroke is gonna expel gases with more force at a higher rate of speed.
11-21-2004, 07:11 PM
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Re: (Stewie)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stewie »</TD></TR><TR><TD CLASS="quote">to decrease spool time, i'd say to increase timing. Increased timing up to a point means more torque. As the cylinder is traveling down with more force and increased speed because of the increased torque, the cylinder traveling up on its ex. stroke is gonna expel gases with more force at a higher rate of speed.</TD></TR></TABLE>
Welp, I guess thats another factor... Exhaust velocity.
I'm sure every setup is going to react differently.
Welp, I guess thats another factor... Exhaust velocity.
I'm sure every setup is going to react differently.
11-21-2004, 08:00 PM
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Re: (Bryson)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bryson »</TD></TR><TR><TD CLASS="quote">Wow...Your cool. lol.
I was just throwing out ideas you ******* *** hole. </TD></TR></TABLE>
hehe, my g/f just called me an ******* too
i'm just pissed b/c my turbo isn't building boost and the reason why is b/c i richened it up 10% in boost and took 5% timing out in boost too. Turbo don't spool till 6k. Thats why i responed to this thread in the first place.
I was just throwing out ideas you ******* *** hole. </TD></TR></TABLE>
hehe, my g/f just called me an ******* too
i'm just pissed b/c my turbo isn't building boost and the reason why is b/c i richened it up 10% in boost and took 5% timing out in boost too. Turbo don't spool till 6k. Thats why i responed to this thread in the first place.
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