2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

optimal shift points for power?

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Old Aug 22, 2009 | 06:03 PM
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Chandler's Avatar
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optimal shift points for power?

Seen random points about this but I would like to get a clear idea together.
This would be with NLS and in a straight line.



please put gear and RPM , then why.

ie : 1st -6100 rpm etc...

thanks
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Old Aug 23, 2009 | 09:28 AM
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It's different with every mod and every different tune. I would say a safe bet would just be to shift a little over 6k. MOST LNF's power curves end around 6k, but some people's tuning keeps it going or has it end sooner.
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Old Aug 23, 2009 | 09:37 AM
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show us your dyno thread and we can make a good guess for you
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Old Aug 23, 2009 | 12:18 PM
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Old Aug 23, 2009 | 12:27 PM
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from the looks of ur graph i'd say shifting at 5400-5600 would be ideal...right where the HP/TQ is at its peak...??? maybe?


all i know is im banging my NLS right at 6100 and im holding full boost all the way to that shift point so idk?? im still on a stock tune as well
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Old Aug 23, 2009 | 12:37 PM
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HP and TQ always cross at 5252. It's a mathematical formula. That will never be your shift point. You want to shift 200 RPM after peak HP. 5700 RPM looks like it'd be the optimal shift point for you. But if you're drag racing, it's usually more beneficial to run 1st gear to redline.
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Old Aug 23, 2009 | 12:43 PM
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^^^ just what he said, rev out first gear and shift around 5700.
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Old Aug 23, 2009 | 12:53 PM
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1st: 7200
2nd: 7000
3rd: 6800
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Old Aug 23, 2009 | 01:01 PM
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Originally Posted by slowswap
HP and TQ always cross at 5252. It's a mathematical formula. That will never be your shift point. You want to shift 200 RPM after peak HP. 5700 RPM looks like it'd be the optimal shift point for you. But if you're drag racing, it's usually more beneficial to run 1st gear to redline.
I disagree, do not redline first gear unless you like to spin, I shift around 5k (not nls) feather the peddle into second and floor it around 4500 in second and shift around 6k(keeping you in the powerband all the way). The key is to not let the tires spin, to trap good I suggest staying in 3rd(depending on the tune). I found going into fourth on a NLS netted me better times.

These are guesses because I go by the feel of the car, I shift when it feels like its running out of breathe, and of course to keep the tires sticking to the ground.

Last edited by Getreadytolose; Aug 23, 2009 at 01:03 PM. Reason: added info
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Old Aug 23, 2009 | 01:23 PM
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The fastest stock times have come from a 5800-6000rpm NLS out of first and 6000 out of second and third gear.
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Old Aug 23, 2009 | 01:36 PM
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stock times have a lot less tq then a tuned time, the tires will spin trust me

Originally Posted by Shibito
It's different with every mod and every different tune. I would say a safe bet would just be to shift a little over 6k. MOST LNF's power curves end around 6k, but some people's tuning keeps it going or has it end sooner.
This aside from 1st gear, its a feel thing with a fwd car

Last edited by Getreadytolose; Aug 23, 2009 at 01:36 PM. Reason: Automerged Doublepost
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Old Aug 23, 2009 | 02:50 PM
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This is stock tuned. This dyno was made with only 800 miles on it. I have around 10k on it now and a KN filter.

question though. I NLS all the time, but have never really glanced at the boost gauge, is there a way to tell if it is correct through the rpm. I do get one heck of a puff of smoke though. LOL

So I will try each of these methods and get back here. THanks so far.
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Old Aug 23, 2009 | 04:26 PM
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Originally Posted by slowstang
The fastest stock times have come from a 5800-6000rpm NLS out of first and 6000 out of second and third gear.

x2...

i ran my 13.7 @ 103.37 when i would slam the NLS from 1st all the way through 3rd shifting right at 6000 and holding 3rd through the finish...i would trap high(er) 102's when i'd NLS into 4th and my times would be a touch slower as well
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Old Aug 23, 2009 | 08:17 PM
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Theoretically speaking you want to be in whichever gear will maximize torque to the wheels. Since the torque curve is pretty flat, I'm going to guess shifting close to red line will give the best theoretical acceleration. I'm too lazy to do the math right now.

Also the real world is different. For actual acceleration you need to know your individual car and driving style.
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