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4.57R, performance changes

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Old Jun 19, 2006 | 04:32 PM
  #71  
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Originally Posted by afwfjustin,Jun 19 2006, 05:14 PM
Alright, I don't understand something about this "extra shift" phenomenon. Here's why:

Let's say with 4.77 gears you are able to pull a few carlengths on a stock car. Now, let's also say this translates into the .3 or .4 second advantage that xvip stated. Now, he said that you would have to be able to shift faster than a 1/2 second to make it up. However, when you are shifting into 5th gear you're almost 100 mph. You may not be "acellerating" during this shift, but you're sure as hell not "stopped" either.

To put it another way, think of wisconsin's video showing him pull a couple cars on another. Let's say that in a 1/4 mile situation his car would get to the end .3 seconds faster. Now, if he has to do an extra shift, it's not like the slower car is going to be able to make up all of that ground just because one car has to shift.

What I don't understand is, how is the shift hurting THAT much when you're going almost 100 miles an hour? Everyone makes it seem like that 5th gear shift with 4.77 gears is going to slow your car down the amount of time it takes to shift... but if you've put 3 or 4 carlengths on someone there is NO WAY they're going to make that up just because you have to shift once more.

Even if it does take you a full 1/2 second to do your 5th gear shift, you car is still moving the speed it was before you shifted and you aren't stopped in a standstill while you shift.

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This is the exact logic that I was trying to put into words. Good post. I have to feel that you are right.
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Old Jun 19, 2006 | 04:52 PM
  #72  
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This might be an odd question but, has anyone modified the stock gears to become a 4.57 as opposed to buying a set?
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Old Jun 19, 2006 | 04:56 PM
  #73  
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Originally Posted by Amer,Jun 19 2006, 05:52 PM
This might be an odd question but, has anyone modified the stock gears to become a 4.57 as opposed to buying a set?
How do you propose to do that? You need to have an understanding of how final drive ring and pinion gears work. You just can't take an existing ring and pinion and change the ratio.

Here is a ring and pinion gear set from an S2000:

The ratio is the number of teeth on the ring divided by the number of teeth on the pinion. How do you propose you're going to change the number of each?
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Old Jun 19, 2006 | 10:43 PM
  #74  
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Originally Posted by xviper,Jun 19 2006, 04:56 PM
How do you propose to do that? You need to have an understanding of how final drive ring and pinion gears work. You just can't take an existing ring and pinion and change the ratio.

Here is a ring and pinion gear set from an S2000:

The ratio is the number of teeth on the ring divided by the number of teeth on the pinion. How do you propose you're going to change the number of each?
That why I asked, maybe someone knows a place that could do this.
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Old Jun 20, 2006 | 07:13 AM
  #75  
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Originally Posted by Amer,Jun 19 2006, 11:43 PM
That why I asked, maybe someone knows a place that could do this.
You don't quite understand the concept, do you?

HINT: You don't take an existing ring and pinion and change the number of teeth in each. Well, I suppose you could take a chisel and just break one or two off.
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Old Jun 20, 2006 | 08:01 AM
  #76  
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as stated, you CANNOT change the number of teeth on an already existing ring/pinion. so there is no such shop that does this.


as for the extra shift.

while yes, a 4.77 vs stock car, even the extra shift, the 4.77 is going to be far enough ahead already that the extra shift is not enough for the stock car to catch back up.

however, take the 4.57 vs 4.77. there, the 4.77 has an extra shift, while the 4.77 does not. and the difference between the two is VERY small. in this case, the extra shift is likely to allow the 4.57 car to "catch up" almost even or slightly behind the 4.77 car.


the 4.57 vs stock there is no contest either, as the 4.57 ends the 1/4 mile in 4th just as the stock car ends in 4th, so there is no extra shift.
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Old Jun 20, 2006 | 09:24 AM
  #77  
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Not to go too far off topic but I have noticed from this thread that S2K JAY's posts are far easier to follow if you mentally impose Boomhauer's voice from King of the Hill...... man.
Originally Posted by s2k_jay,Jun 16 2006, 02:27 PM
the only reason why i said that is because i raced my friend in his silver 02 all the time when we were both bone stock and talking about off the line we even roll out first gear i was ahead of him already just like that 4.57 gear video and that's stock but seriuosly i didn't have to lied about this so that's why he told me that the new ones got better gear ratios and is offically 10% faster then the old one and im sure honda wouldn't even have to do this upgrade to a 2.2 and make it 8200 i know it was odd at first compare to 9k redline but once i test drove both cars you can already tell but just don't get offended we still s2000's out there you heard lol
See?
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Old Jun 20, 2006 | 09:27 AM
  #78  
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DOUBLE POST
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Old Jun 20, 2006 | 10:31 AM
  #79  
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Originally Posted by SheDrivesIt,Jun 20 2006, 09:24 AM
Not to go too far off topic but I have noticed from this thread that S2K JAY's posts are far easier to follow if you mentally impose Boomhauer's voice from King of the Hill...... man.


See?
Hahaha now that there's funny.

So I know gears lower top end but do make you slower on the top end say from 60-120? Prolly a wayy noob question but eh gotta start somewhere. Haha

Thanks
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Old Jul 8, 2006 | 08:41 AM
  #80  
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Tested my new gears on the track yesterday. It was rather cold out about 45 degrees and windy. Had to do a long and good warm up on the tires. My best time was 14.090 on about 110 mph and reaction 0.009 sec.

Not happy with these times and had to go about 6 times before I finally went down to the low 14's.
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