Rpm Reading

[anticeptik]

Drove my ceffy up to winton today to watch drift atack, found out my spedo is 10k's out no drama but had a funny feeling its to free reving.

I was doing 110 just under 4000rpm in 5th gear?

Im pressuming that because my car had a manual conversion in japan they probably keep the stock auto diff but would that acount for that high?

What are you guys sitting on at 100 or 110k

[samdumbert]

Im probably about the same about 4000rpm. My cefiro is a factory manual.

[anticeptik]

Really, hmmm any one else

[funkymonkey]

mine sits at 3200 on the cef, altho its an auto, so meh. my R32 sits at 3010 usually in 5th gear, but its a GTS4, so its got a higher gear ratio than a cef.

[Resin]

mine sits at about 3000 at 110 km ...factory manual ...4000 seems seriously way to high.

Edited September 9, 2007 by Resin

[Chris_A31]

Yeah mine sits a lot lower than 4000@ 100 in 5th. I have done a manual conversion on mine since it's been in aus too so it shouldn't be any different. I still have the stock auto diff too, not sure if there is any difference with the manual one.

[anticeptik]

yeah i figured it was way to high.

So me and samdumbert are in the same boat.

What could cause that considering its not the diff?

Edited September 10, 2007 by anticeptik

[Resin]

are they rb20det gearboxes ? is there a difference in ratios between the non turbo and turbo models gearboxes?

what was the reason for it not being the diff?

Edited September 10, 2007 by Resin

[funkymonkey]

final drive ratio is different for auto's and manuals, not sure about turbs and non turbs.

[Guest a31rb25]

my speedo is 20km fast, RB25 eng & box with a 4.3:1 diff so that might explain my speedo issues, not really too sure why though. my revs seem really high too, but again i think that's the diff

Edited September 11, 2007 by a31rb25

[anticeptik]

Ill work out the ratio on mine tommorrow when i chuck it on my hoist

[toffy]

my first ceffy sat on around 3-3.5krpm @ 110-ish, my new one doesnt have a working speedo but it seems to travel with the traffic at about the same rpm. my 33 sits very similar in the revs but it has a 3.79? ratio diff, so the gear ratios in rb25 boxes are definately different. do you know what type of gearbox you have?

[anticeptik]

I dont know, i'll have to check.

Im assuming its a rb20 one because i feels exactrly like the one that was in my 31.

Doesnt feel like a 25