Flippit

Hi Guys,

So one of the past owners of the S2000 I purchased reckons it has a 4.77 installed.

I set my cruise control on 60kms, it was sitting on 2000rpm and my GPS said I was doing about 54kmh not 60.

Is there any other way I can check? When you change the ratios I know the speedo gets effected but do the revs stay the same or do they become out of whack also?

If I were to buy this http://www.ricks2k.com/products/yb.php will the plug and play work for our RHD Aussie model S2k's?

I've tried searching but find mixed results, u.s results, or not so clear results so want to find out for my self!

Thanks in advance!
Phil

Hondaplease

Its not that the revs go out of "whack" its just physics. Shorter ratios means the engine has to work faster to maintain the speed hence the higher rpm's. At 60 if you had 4.77's you'd be sitting around the 52 mark. The readings you're depending on aren't all that reliable but given your findings i'd imagine you may have gears. Ricks/modifry sell the unit (yellow jacket/box) and yes both can be used to recalibrate the speedo.

Flippit

I understand the whole concept of it. The reason I say revs out of whack is cause seeing the speedo be incorrect I was wondering if the rpms would show correctly to adapt to the new ratios or if it incorrectly shows. Seeing as the revs wouldnt run off the gearbox like the speedo i'd assumw it would be fine but wanted to ask.

6th gear - 60kmh - 2000rpm? (Cluster)
6th gear - 60kmh - 2250/2300rpm (gps)
Sound stock or....?

rus21s

Rev range is accurate but not the speedo. I would get the box cause it will clock more KM than it really is. I here there is a place in queensland that has a box that is direct plug in to fix the speedo, I will find out.

chris_barry

Yellow box is an aussie company. They now offer a direct plug and play version so no alteration of your wiring is needed.

http://www.yellr.com/yb_home.htm

I did a review.

https://www.s2ki.com/s2000/topic/102...#entry22609726

Flippit

Thanks guys, may buy one with plug and play harness!

On dyno today the Dyno was reading 100km whilst my cluster showed 112km.

Are stock usually that much out? If not is it possible I may have 4.44's? mmmmm

ducbui91

Does anyone know if theres a DIY for Australian s2ks because my 4.77s is just raking up extra kms for the past year.

ps. it is ricks yellow jacket

BigDRichy

What did your figures read on the dyno?

ninelarge

No. Although there are several factors that can influence the reading, it shouldn't be in error by that much. Based on the speeds you've mentioned, you probably have a 4.56/4.57 FD (i.e. 112/100 ~ 4.56/4.1).

ninelarge

There are several searchable links on s2ki (even from Google). It's fortunately not too complex to hook up.

Here, let me Google it for you...

http://lmgtfy.com/?q...llow+box+how+to

http://www.modifry.c.../yj/install.htm

https://www.s2ki.com/...odifrys-yellow/