Important Question
05-15-2006, 05:26 AM
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Important Question
I have a 06 z and when i race i shift at 6400- 6500 rpm instead of redline because i read this in the reviews " Those 300 horses are produced at 6400 rpm, only 600 short of the 7000-rpm redline." Should i shift closer to redline when racing, will it make a difference in my races since im at max power at 6400? My roomate has a 05 g35 and he takes it to redline when racing?
Last edited by ChazzReinhold; 05-15-2006 at 05:39 AM.
05-15-2006, 07:17 AM
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I havent went to the track yet, but ive been racing alot 
MY roomates car 05 g35 with intake/exhaust/groundingkit now loses to me from a stop and a roll all the time, all i added was the skunk2 plenum spacer and i shift at 6400-6500. Im going to start shifting closer to redline and c if i pull him more. Hopefully i can get to the track soon and run it, im gonna b nervous as **** the 1st time going down it.
MY roomates car 05 g35 with intake/exhaust/groundingkit now loses to me from a stop and a roll all the time, all i added was the skunk2 plenum spacer and i shift at 6400-6500. Im going to start shifting closer to redline and c if i pull him more. Hopefully i can get to the track soon and run it, im gonna b nervous as **** the 1st time going down it.
05-15-2006, 07:27 AM
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Shift as close to the rev-limiter as possible. Staying in a lower gear longer is beneficial because the engine makes good power all the way until redline, and the greater torque multiplication of the lower gear = faster acceleration. It will also raise the rpms at which you engage the next gear putting you that much closer to peak power in the next gear.
In short, don't short shift if you want maximum acceleration.
In short, don't short shift if you want maximum acceleration.
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05-15-2006, 07:59 AM
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Shift @ redline! Keeps you in rev-up powerband(-You would get better responces if this was posted in the street racing forum also!)Just a question, why a plenum spacer on the rev-up plenum any reasoning for that!
05-15-2006, 08:40 AM
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Originally Posted by Zfast4U
Shift as close to the rev-limiter as possible. Staying in a lower gear longer is beneficial because the engine makes good power all the way until redline, and the greater torque multiplication of the lower gear = faster acceleration. It will also raise the rpms at which you engage the next gear putting you that much closer to peak power in the next gear.
In short, don't short shift if you want maximum acceleration.
In short, don't short shift if you want maximum acceleration.
Potentially there are more effective shift points depending on the gear and speed we travel due to drag. But seeing as you don't have a team backing you with lab equipment just shift at redline.
05-15-2006, 08:41 AM
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Well I was hanging out at my friends shop and he had 1 that wasnt used yet and said i could have it for $150. I searched the forums and couldnt really find any dynos or anything sayin not to use it. I have noticed a huge increase in power after 3500-4000 rpm. car sounds and feels alot better than b4. The only way i have tested it was a few runs against a g35. b4 the spacer it would b close but he would usually win, now ive won the 4 races since the install by creeping away from him to almost about a car length. Do u have any imput on the spacer?
05-15-2006, 09:14 AM
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Originally Posted by kpiskin
You should try to get the rev limiter taken off so you can go up to like level 9 rpms, and that should give you turbo-like power.
05-15-2006, 09:20 AM
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Maybe the Skunk2 plenum is causing you to run leaner. Did you ensure to reset the ECU when you did the install? You should definitely be getting more power up top.
05-15-2006, 09:49 AM
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hmm, interesting concept!
the person to talk to about this would be motodyne, i am pretty sure they have tested this setup, and to my knowlege it does very little but shift the powerband!
but it might be worth looking into further!
the person to talk to about this would be motodyne, i am pretty sure they have tested this setup, and to my knowlege it does very little but shift the powerband!
but it might be worth looking into further!
05-15-2006, 02:12 PM
#19
Originally Posted by ChazzReinhold
I havent went to the track yet.
Shift at the top of the horsepower curve in each gear. For your car, I don't know where that is. Some racers set the rpm light to 6800 rpm. Consider that it takes a second to recognize the light, then shift. More important than the shift point is how many rpms does the engine fall when shifting.
