|10-26-2006 06:47 PM|
|fokuzx3||good job sporadic...16.3 very respectful...my advice is take some air out of the front tires and work on different launching points to get that 60' to a 2.2 ...good job n good luck|
|10-16-2006 05:39 PM|
|10-16-2006 03:03 AM|
|BlueOvalFan||i must say, i like the ST's! one whipped my butt at the tcark my very first run. those suckers will move with some work done. i'd have to beat them on top end because i cant bottom end :o)|
|10-15-2006 10:35 AM|
Let us know what happens M/M.
|10-15-2006 10:32 AM|
I used my stock dyno and those are the number I came up with.
I haven't actually "officially" tested the difference. But next friday when I go back to Ennis(1/4 Mile) I'll test the 2 out and see how it goes.
|10-15-2006 10:16 AM|
I was going by zx3's dyno chart above, so if someone's car is modded then the actual numbers will be different (but the principle still the same).
In the end anyway, the proof of the benefit of shifting at a higher rpm for racing is in the time slips.
Question: Have both you and Ripped tried shifting at 6500 rpms and then at 6000 rpms at the track?
Was there a difference?
I always shifted at exactly 6000 rpm, maybe I should have gone higher ...
|10-15-2006 10:12 AM|
|UB!!||so i am stock.....lets just say i really wanna get on it going on the freeway...would it be safe to shift that high....i have never really been in that territory|
|10-15-2006 04:05 AM|
|Ripped_06_ST||I try and tell people that all the time Jason... but they are like huh?!?! wha?!?!?!|
|10-15-2006 02:43 AM|
Yep. I tell everyone that and your like the first one who actually understands it.
Your numbers are a little off as well.
The shifts are 6500-4064 and 6000-3750.
6500 is 124.61
6000 is 129.71
4064 is 102.66
3750 is 93.03.
6500-6000 is -5.1hp
4064-3750 is 9.63hp.
Which gives you a difference of 4.53hp.
So you were close on the difference.
|10-15-2006 02:41 AM|
Re: Re: Re: Re: Drag strip times stock 2006 zx5
If we shift at a higher rpm, then the next gear you catch is gonna be at a higher rpm, thus putting you into the meatier part of the engine's powerband.
So if we take that info and apply it in an example of the 1/2 shift:
1st gear @ 6500 rpm = 35.1mph
35.1 mph for 2nd gear puts us at 3990 rpm
Now if we shifted at only 6000 rpm:
1st gear @ 6000 rpm = 32.4mph
32.4 mph for 2nd gear puts us at 3680 rpm
So by shifting at 6500 rpm, we go up 300 rpms further into the engine's powerband at the next shift.
Now (going by zx3chick's stock dyno sheet below), if we shifted out of 1st at 6000 rpms, we would be in 2nd gear at roughly 3700 rpms making 87hp.
But if we shifted out of 1st at 6500 rpms, that would put us into 2nd gear at about 4000 rpms making 102 hp.
So what we should ask ourselves then, is how much hp do we "lose" when prolonging the shift to 6500 rpms versus 6000 rpms?
Well, at 6000 rpms we're making about 127hp, versus about 117hp at 6500 rpms. So we lose 10 hp in extending the upshift.
But, we gain 15hp by being higher up in the engine's powerband in the next gear.
So all in all, we're a little ahead of the game by shifting at a higher rpm.
Man, I've got a headache ....
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