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4.77 and quarter mile question

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Old May 25, 2006 | 07:29 AM
  #11  
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At first gear, its a bit tough time it perfectly since I dont want the engine to cut off so I shift right before it hits redline..2 and on, I shift evertime it blinks once in redline. Is that the proper way to do it. I never hit the rev limeter in any of my runs
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Old May 25, 2006 | 07:33 AM
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Originally Posted by rikhemi,May 25 2006, 07:57 AM
I know what your point is xviper about shifting, but I acheived the same time stock as with the 4.77. My shifting to me is the same, so I should have at least improved a couple.? on the quarter-mile judging that gearing helps you accelerate faster than a stock s2k.
I'm afraid you have missed the whole point that I tried to make. It is easy to see why your times never changed. Can't you? 4.77s can gain you up to 1/2 second in a 1/4 mile, BUT because you have to put in an extra shift, you GAINED that 1/2 second back. If you can shift very fast (and I'm not going into the semantics of how you can do this as this is driver understanding and driver limited), you can overcome this disadvantage, get up even more speed and quite possibly need to go into 5th before you finish the 1/4. Sorry, but I can't put it in any other way to help you understand this.
It's unfortunate that you got 4.77s for 1/4 mile duty. It's more for blasting around on the streets and for some track layouts.
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Old May 25, 2006 | 07:39 AM
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I Understand what you are saying regarding the extra shift, but on a 4.56 car or even stock car compared to a 4.77 car, the 4.77 car can hit 100 until it has to shift to 5th gear. So the extra shift should have nothing to do with this example since the max mph I hit was 98. If I hit 103, then I understand how the extra shift at 100 could have slowed me down.

I still like the effects on the quarter mile and I love the fact I dont have to downshift most of the time anymore. But I just expected a greater result and mph gain in the quarter-mile.
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Old May 25, 2006 | 07:42 AM
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Sounds right.
But during the shift try to quickly shift and engage the clutch as fast as possible and benchmark yourself by observing when in the Rpms you engage, and work from there.

The best shift is the ones that engage as quickly as possible without sacrifice much drop in revs so that you continue to deliver power to the wheels.

When you engage the clutch on shift, hopefully you time your trottle input correctly to make the accelleration curve raise up without spiking down as a result of not giving it proper gas during power shifting. Its a combo or knowing how well your clutch is catching and how much gas to give.
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Old May 25, 2006 | 07:53 AM
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Originally Posted by rikhemi,May 25 2006, 08:39 AM
I Understand what you are saying regarding the extra shift, but on a 4.56 car or even stock car compared to a 4.77 car, the 4.77 car can hit 100 until it has to shift to 5th gear. So the extra shift should have nothing to do with this example since the max mph I hit was 98. If I hit 103, then I understand how the extra shift at 100 could have slowed me down.
Nope, you are still not understanding the overall concept and this thing is just going around in circles. I'm running out of ways to explain it to you. This will be my last attempt.

Read your statement that I just quoted. Notice how you use the term "I"? You are comparing what an S2000 can do by looking at the numbers generated off the gear calculator WITH what you can do. Just because you can only get up to a max of 98 mph doesn't mean that, in someone else's hands, the car won't be going much faster at that same point.
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Old May 25, 2006 | 07:55 AM
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The best way I can testify for the benefits of 4.77 gears from my experience with 4.56 is it makes the S2000 more of a drivers car. Not particularly a quarter mile car still.

Zip zapping in and out of corners providing way more torque control for experienced enthusiusts behind the wheel to slow down and accellerate harder all from the benefits of having the revs travel quicker through the power band.

I think if you can improve on your shifting, you will see results on the quarter mile in any S2000 stock or geared. If you are a consistent quick shifter like Wisconson, then moving to gears will quickly show results. But if you are still learning to shift, gears may not prove to deliver that result you desire immediately in quarter mile timing, but in overall driving, it's very noticable.

I personally would LOVE 4.77 gears, but couldn't do it because of the highway driving. 4.56s are great.
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Old May 25, 2006 | 08:48 AM
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Originally Posted by rikhemi,May 25 2006, 08:13 AM
But there are cars in the quarter-mile post with a 2.2-2.3 60ft time running 13.6-13.9 with gears. My shifting hasn't changed from last year. And even if it has, it would it make a .8 sec difference since I was able to get a 14.4 last year stock. Winsconsin, whats the best time a 4.77 geared car has run. I know many have ran with 4.57, but I havent seen much about 4.77.
And is shifting the only explination regarding the slow mph of 77mph time on the 1/8.

I just dont see how shifting faster can get a .6 to .8 sec drop compared to a similar 60ft 2.2 time.
shifting is easily one of the biggest losses in time for a driver in the 1/4 mile. .5 seconds is nothing for a shift, much less for the 4 or 5 you have to make.


people who run 13.6 with a 2.3 60' with gears are shifting fast. have you ever seen my shifting video? look in my sig. if you're not shifting as fast as that, then you're not shifting fast enough.


you're trying to blame your car, and that simply isn't the problem.
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Old May 25, 2006 | 08:49 AM
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Originally Posted by the dumontster,May 25 2006, 08:17 AM
What are your trap speeds at the end of the quarter? Sounds like you are having a hard time hooking up off the line. How are your launches, meaning, are you bogging or producing a lot of wheel spin?

I am going to install the 4.77s as well, but I went to the track stock and put on a spin show until I adjusted my launch; I am used to launching awd cars. Good luck.

edit: I just looked at the other post. Does a stock s2000 trap at 98~ in the quarter at its best?
a stock S2k traps about 101-102 at best. 98 is weak. if you have a good 60' time and a 98mph trap, then you're shifting too slow.
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Old May 25, 2006 | 08:50 AM
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Originally Posted by rikhemi,May 25 2006, 08:22 AM
Trap speeds didnt exceet 98pmh.. If I was looking from the crowd and saw someone driving my car, I would have thought it was stock. I think my highest trp speed was 98.74mph. I did the first two runs have a hard time hooking up. I tried a recommendation of a post to drop the clutch at 6k and just accelerate until it grabs but that didnt worrk that good. I was peeling out till around 32mph. The best run I had I let it off slowly from around 5k and it peeled out just about a sec and then went off. I thought it was at least a high 13 to low 14 run since it was much better than the others, but didn't happen. Never really bogged. I try to avoid the bogging since they advised it affects the differential. Mainly wheelspin except for the my last run which wasn't much wheelspin
what was the temperature and humidity? this can also have a big effect, however, with that trap speed, it indicates your shifting speed is the problem.
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Old May 25, 2006 | 08:52 AM
  #20  
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Originally Posted by rikhemi,May 25 2006, 08:57 AM
What is a fast shift, like taking .25 on every shift. Isnt that close to like power shifting. How can you achieve a shift like that, I guess when you cluch it, you just drop the clutch like in a lanch instead of moving your foot back.

I know what your point is xviper about shifting, but I acheived the same time stock as with the 4.77. My shifting to me is the same, so I should have at least improved a couple.? on the quarter-mile judging that gearing helps you accelerate faster than a stock s2k.
this statement confirms my suspicions. again, look at my shifting video.

a good shifter will do this. first, you actually start to pull the shifter out of gear before the clutch is even disengaged. and when you do disengage the clutch, it never goes all the way to the floor. only enough to get you into the next gear. a good shifter will know how to do this instinctively.


you missed xviper's point. since there is an extra shift, if you're taking .4-.5 seconds to shift, then you've lost any advantage the gears gave you.
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