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4.57 gears - real life performance improvement?

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Old 07-01-2005, 02:57 AM
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Originally Posted by Amuse Boy,Jul 1 2005, 10:51 AM
Craig - have you read some of the comments about the 4.44 gear set? Quite a few people have mentioned not feeling a huge difference.

Have you guys seen the "how to" on removing the diff? Seems to be a quite a challenging task.
the 4.57 graphs are pretty similar to the 4.44s, bear in mind the 4.57 is a 14.25% difference and the 4.44 a 8.3% difference. TBH I'd go the 4.57s if it weren't for the fact that the 4.44s, if fitted properly, should be as quiet as stock, whereas the 4.57s clearly aren't going to be. The other alternative is the 4.625 from KIA.....

The diff removal doesn't look that bad AB - I've seen both xviper's and another baord member's threads.
Old 07-01-2005, 05:11 AM
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Removal doesn't look bad? Bleedin heck mate - I was a bit put off after reading through the threads...

And I'm not shy of working on my own car - I've installed all mods on my car but this just looks really tough...or am I just being a wuss!?
Old 07-01-2005, 05:34 AM
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Originally Posted by Amuse Boy,Jul 1 2005, 01:11 PM
Removal doesn't look bad? Bleedin heck mate - I was a bit put off after reading through the threads...

And I'm not shy of working on my own car - I've installed all mods on my car but this just looks really tough...or am I just being a wuss!?
Well, I did buy my Dad a Dremel for Father's Day which could come in handy if one of the drive shaft bolts is seized as happened to one of the guys who removed his diff
Old 07-01-2005, 07:29 AM
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A few things to bear in mind.

The fitting kit from Rick's doesn't include everything you need. Most bits, yes, cheaper than you get them over here, so still worth getting. But you will need a few more bits from the local Honda dealer.

Dropping the diff isn't that tricky. Dropping the propshaft can be. It uses some allen head bolts that love to round. You can't get in that well. I'd certainly budget on replacing them.

-Brian.
Old 07-01-2005, 07:39 AM
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Originally Posted by Turtle,Jul 1 2005, 03:29 PM
Dropping the propshaft can be. It uses some allen head bolts that love to round.
See my earlier post re a Dremel - I'll probably end up with a slightly lighter car too
Old 07-01-2005, 08:52 AM
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Originally Posted by craig armstrong,Jul 1 2005, 08:45 AM
The thought had crossed my mind AB, its just the inconvenience of dropping the diff off the car for a few days.
I won't have this problem as I have bought a Dif from a breaker

I paid ~
Old 07-02-2005, 01:09 AM
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Steve - can't remember the exact list but if you check the service manual there's a list of parts needed. It's also a case of checking the output shaft bearings - they wear quicker when the lsd is working, so it's not just a case of mileage, but driving style too.

Craig, I don't think a dremel will be any use for the propshaft. The thread the bolt goes into is in the propshaft - so you can only grind the bolt heads off which doesn't help in getting them off at all.

-Brian.
Old 07-02-2005, 06:33 AM
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I think I'm gonna give this a miss for the time being - this is exactly what I said when I was thinking of changing the manifold

Will be watching your progress Steven/CA
Old 07-06-2005, 11:07 AM
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Originally Posted by Turtle,Jul 1 2005, 03:29 PM
A few things to bear in mind.

The fitting kit from Rick's doesn't include everything you need. Most bits, yes, cheaper than you get them over here, so still worth getting. But you will need a few more bits from the local Honda dealer.

Dropping the diff isn't that tricky. Dropping the propshaft can be. It uses some allen head bolts that love to round. You can't get in that well. I'd certainly budget on replacing them.

-Brian.
Getting the Diff off isn't really hard...the only thing is the one that Brian mentions here...the propshaft bolts may get damaged.

I took off th epropshaft already many times...usually I have to break 1 or 2 bolts cause the are sitting very tight.

Apart from that it's a pretty easy job.

Putting it back is even easier.

Takes about 2 hours take it off and putting it back and I am NOT a trained mechanic.

I only have a race prepped S2000 and have to do all on my own to save some money.

I you guys need a KIA diff my KIA dealer over here in Europe gives me pretty good deals on these.

He has 4.44 , 4.625 and 4.778 in stock.

Let me know if you need one.

These are around 300 Euro's each (incl VAT) and I need to check for shipping to UK if some of you are interessted.

I currently run the 4.625 in my car withou any noise.

It runs very properly.

But for the install of the gears itself you need to get a specialist to do it as special measuring tools are needed. costs for this are around 200-250 Euro's

It is definitely worth it.

Definitely mor efun driving the S
Old 07-06-2005, 11:41 AM
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Lou, Stocky was my source

I'm very interested in the 4.625 gears


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