s2konroids

I'm out in the car today for the 1st time in a week, (not looking forward to it as they dont grit/clear the roads where i live) because of the silly police wanting mot+reg plates+light fixed within 14days during a festive period .

I'll check, but I'm pretty sure 4.57/6 sits ~ 500rpms highier

m1bjr

Thank you, I cant easily locate the ratios and should really be working over here

s2konroids

This link will be of some use for you http://www.turnzero.com/technical_resource...gear_calculator

Choose S2000 MY00-03, the MY04+ is (Ap2) yank version so the gearing is different.

m1bjr

Just looking at 4.77 from the Kia, trying to find some UK solution I can build myself
LSD can wait, it's no biggie but a shorter rear is more use on a track toy.

KIA sell part # 0K01427110 for £454.21 plus VAT

Robbing gits, thet yanks claim to get these 4.77 gears for about $300.

Sometimes I wonder about this country, I'll probably import the bloody thing.

punchdrunk

I'm not sure the 4.77 is recommended for the AP2. I think the gear ratios are different, 1st -3rd, so it would have the effect of reducing top speed to 120mph or so (142 mph for the AP1).

This information could be for the F22C engined S only, but best to do some reeaseach - 4.56 is recommeded for the AP2

m1bjr

I dont have an AP2. I have an 06 UK car, the numbers on the box are bit different for the 2.0l.

Might take a punt on a used ring gear, plenty of scrap Kia fronts about, some local.
One of those gambles I guess, but at £100 who cares.



Steve

s2konroids

As stated before, also highier is not necesarily better depends on what you want.

Ricks and hardtop guy maybe the best choice Steve.

p.s i couldnt get the car off the drive today so I'll have to wait but im sure it sits 400-500rpm highier in gear.

m1bjr

Cheers mate.

I found those graphs useful to determine what I need.
Apart from possibly Spa I doubt a 240bhp car like this will ever hit full rpm in top.
My aim being to max out the performance up to 140mph tops.
The Kia ring would do this.
Not fussed about motorway rpm, who cares if its on high cam or not it makes no odds.

s2konroids

I think on the dyno my car was just shy at of 150mph with 4.57r, IIRC it was maybe 147/148MPH i only did it once to see what speed it would do so i cant be 100% sure.

IMO/IME 4.56 is a good halfway house for performance, 4.77 is too overkill but thats my opinion.

s2konroids

For sure from a standing start the 4.77 will be quicker but as speed increases your torque advantage decreases since you find yourself highier in a higher gear, i like to think of A.M gears taking advantage of the car snappy high revving nature taking advantage of gearing at high revs.

On a race, a driver in 5th gear before will now be in 6th at a particular higher rev point because of the 4.77 FD.

The 4.77 ratio offers more torque, its better lower down so on a track (dont know many names so cant comment, think croft has a few) with loads of harsh bends/right hands turns where you really need to slow it will help, but on a straight as you say you could top out max mph. But also with 4.77s you use 6th gear as you change up through these turns-making your shift points and entry/exit speeds coming out of the turns more usable power wise. You'd be changing gears more often. On a motorway (i know you said your not bothered) it would do my tits in sitting at 70mph, changing gears to buggery on the road and probably being just out of vtec.

If your into 1/4mile the 4.77 would be ace

4.44 IMO isnt much difference, 4.57 you kinda flip flop with a standard S but ultimately just ahead so it is better, 4.77 can be slower in some scenarios vs a stock S.

With my gears, lower weight and 260BHP it certainly accelerates better and easily dispatches pesky CTR's on the road of course .

I also think Honda wanted a 160MPH roadster (good publicity figures) out of a 2.0l hence the gearing.

For me i just think 4.77 are overkill but thats me, depends on what your want.