C33 Speedo Corrector

[raZ1911]

Hey guys

I converted my RB20E auto C33 to manual RB20DET with RB20DET gearbox and also changed to a 4.3 ratio diff and now i need my speedo corrected.

Would one of these kits from J car work?

http://www.jaycar.com.au/productView.asp?ID=KC5435

If not, what can i do to correct the seedo?

On a side note, seeing as though turbo C33 came with 4.3 ratio diffs and i have a automatic cluster, Would installing a manual cluster make it correct? (as i have one of those but not installed).

Thanks.

[Nic_A31]

All you need is the speedo drive/sender from a gearbox off a car with that diff ratio.

R32 GTSTs are 4.36:1

[Got a Pulsar]

My car was an Auto but was converted to manual in Japan. (still has auto diff I believe)

The guy I got it off put in one of those Jaycar dealies and reckons it was set to be bang on the correct speed from using a GPS, although I haven't actually tested it.

[raZ1911]

I was told the speedo drive/sender i have came from a R32, guess they must of been wrong.

[Nic_A31]

Gts4, GTRs and maybe the NA models have different diff ratios therfor different Speedo senders.

[raZ1911]

Off to find a real R32 speedo drive thanks very much

[Dan_J]

i adjusted the ceffy ( assume c33 would aswell) speedo by repeatedly pressing on the needle forward for more speed or backward for less of a speed reading.

not sure if its just my luck or if it'll work for everyone else

[daisu]

Those corrector boxes are used to modify electronic signals for electronic speedometers. The C33 uses a cable driven speedo so it would not work.

When the final drive (diff) ratio is changed, the pinion on the speed sensor in the gearbox is also changed to suit. I think you will find that the speedo pinion in the gearbox you have is to suit the 4.3 diff ratio as that is the standard ratio on R32 GTST.
If you find that the speedometer is still out, try to calculate the percentage of error, then you can change the speedo pinion in the gearbox to correct it.