Stagea Manual Conversion Guide

[Ska]

Stock RS Four V's dont have LSD as standard, I have a GTR diff and if sits on 3k rpm at 100kph in 5th, but that also might be because of the nismo gearset used too.

[captinsane]

Yer, I got that

Ur nismo gearset is a smaller ratio than standard - ie: making more acceleration... Correct? so standard GTS4 gearset with resulting final drive ratio should be OK?

Are GTS4 and GTR gearbox ratio's different (i would assume they are - RB26TT power vs NA RB25) thus - the more acceleration from the GTS4 gearbox would have similar results on the whole 3500rpm down the highway drama so GTS4 gearbox would not be 'the best option'

???

Finally... GTR diffs are 4.3 whereas Stagea are 4.11 (supposedly)...so how are people not farking up their 4wd? (apart from Yokotas who has no front propeller shaft anymore ?... different crowning kits etc etc (i think they are called that)...

Me and my questions....meh

[darrinspencer]

Yer, I got that

Ur nismo gearset is a smaller ratio than standard - ie: making more acceleration... Correct? so standard GTS4 gearset with resulting final drive ratio should be OK?

Are GTS4 and GTR gearbox ratio's different (i would assume they are - RB26TT power vs NA RB25) thus - the more acceleration from the GTS4 gearbox would have similar results on the whole 3500rpm down the highway drama so GTS4 gearbox would not be 'the best option'

???

Finally... GTR diffs are 4.3 whereas Stagea are 4.11 (supposedly)...so how are people not farking up their 4wd? (apart from Yokotas who has no front propeller shaft anymore ?... different crowning kits etc etc (i think they are called that)...

Me and my questions....meh

I asked a similar question in the other manual checklist thread

/www.skylinesaustralia.com/forums/index.php?s=&showtopic=65422&view=findpost&p=2152863

So for example, all 5spd manual boxes are 1:1 ratio in 4th. The transfer case on the back of the auto and manual gearbox is also 1:1. The gear ratio's in the gearbox are irrelavant.

So the final ratio's are not changed from a auto to manual conversion

Does that make sense?

[captinsane]

I asked a similar question in the other manual checklist thread

/www.skylinesaustralia.com/forums/index.php?s=&showtopic=65422&view=findpost&p=2152863

So for example, all 5spd manual boxes are 1:1 ratio in 4th. The transfer case on the back of the auto and manual gearbox is also 1:1. The gear ratio's in the gearbox are irrelavant.

So the final ratio's are not changed from a auto to manual conversion

Does that make sense?

If so then that is good news... perhaps the 33 4 door auto is different to the stagea 4WD auto - besides the transfer case obviously. hmmm.....

THanks guys

Edited May 2, 2007 by captinsane

[juls33]

thats all good that the gearboxes are the same ratio

but the diffs would be a diff ratio auto to manual

any one know the diff ratios for the gtr(frt and rear) and the stagea ?

if you change only the rear diff(ratio)then you are going to get windup where the rear wheels

are turning faster than the frt wheel due to the ratios

[captinsane]

yeah dean... the GTR diffs are 4.11 and Stagea are 4.3 (I am sure of it at least)

Brad - when you replaced the rear diff - did you replace the front also? or have i missed something - did you alter the diff ratio from 4.11 to 4.3 - your PM before mentioned nothing of it.

Edited May 2, 2007 by captinsane

[Duncan]

you only have a problem with ratios if you swap the front or rear diff without swapping the other. And you will notice straight away the 4wd will go crazy. Changing the box or xfer case makes no difference as it affects both front and rear drive shafts

[beastien]

The difference is not worth worrying about, mine is about 5km/h out on the speedo compared to with the auto.

Slower that is.

[yokotas13]

ok, i just got back from a 300KM trip

at 110 KPH im ar 2700 RPM

[beastien]

Yep, sounds about right for me aswell.

[Stinky Rooster]

so why is my stock S1 auto sitting at about 500RPM lower at -110kph?

I thought the overdrive in the manual would bring it down to about the same.

[yokotas13]

maybe the final gear in teh tranny is lower than the manual?

[captinsane]

2700 @ 110k/hr... that actually isn't too bad at all. i could even get a different ratio 5th later on if i wind up doing a LOT of highway driving (like Brisbane to TSV every few weeks). That's golden.

FYI also

GTR R32

1st gear ratio 3.214

2nd 1.952

3rd 1.302

4th 1

5th 0.752

most Nissan auto's in O/D (Q35, 240sx, s15 et etc so it is similar regardles of engine capacity and power etc etc) seem to be in the range of 0.65 or 0.69, if the torque convertor isn't running all over the place as you feather the pedal and lock up the TC, and then wind up boost, and then go back tdown again... I HATE AUTOS

so basically the RPM and speed is perfectly fine... and the diff is fine stock for daily application... unless i want to do a BRADLEY..bwahahahahahahaha (*thinks...ahh...RB30DET torque *)

AWESOME

i might even get a custom 5th gear made up if i ever convert...make the ratio 0.7 or something close to that. I find that when trying to sit on 100 off boost in O/D i intermitently lock up the TC to maintain speed (stays constant at 90-95kmph and 120kmph...just not 100-110) ... thus perhaps the 0.65 or whatever in the auto OD is a little low for long distance applications.

Edited May 3, 2007 by captinsane

[yokotas13]

also if it matters im using a stagea manual gearbox from an Autech

[captinsane]

This is truth...although the autech stagea diffs are probably different

[tRUkbOY]

When I was running the R33 GTS-4 box 100 km/h was about 2700rpm from memory. My final drive is 4.083. Don't ask me what it was when it was Auto, I really have no idea.

Now I have the RB26 & the 260RS 5 speed but still running the same diff (but with my 18's) & now its 2500rpm at 100 km/h. I will be fitting the 260RS diff shortly (a 4.111) so it will change again no doubt. My speedo is 100% correct as I have driven past a couple of those mobile 'display speed' trailers that we have round here every now & again.

I'm not too sure where everyone gets this "stagea's run a 4.3 ratio" as I have NEVER seen one with RE4R01A RC43 on the chassis tag. All that I've seen (and there have been a few) have had RE4R01A RC40 (same as mine) suggesting a 4.0 : 1 ratio

[captinsane]

I'm not too sure where everyone gets this "stagea's run a 4.3 ratio" as I have NEVER seen one with RE4R01A RC43 on the chassis tag. All that I've seen (and there have been a few) have had RE4R01A RC40 (same as mine) suggesting a 4.0 : 1 ratio

you would be correct... i got the numbers from Brad but forgot to remember that he changed his diffs front and rear so that he could get more POWAAAA

And the Autech diff ratio's being different makes perfect sense creating more acceleration (if autech is 4.111 and RSfour spec is 4.0)

YAY... so the verdit for me is that replace the GB and your freeway rpm remains very comparable -and is not worth whinging about I am le-happy...

[yokotas13]

yay mine says RC40 i just check!

[Terminal]

Well, After over a year of preparation, I have finally started my manual conversion. I took the front bumper off to get her up on stands while I put the clutch/brake pedals in, as well as a new turbo and replace a lot of worn seals. Hopefully in a few weekends I'll get it all finished, then it's off to the workshop for a quick gearbox switch-a-roo and I'm ready to go. PowerFC can wait a bit longer until I've got the car (and funds) back under control.

[beastien]

Good stuff Andrew, good to see you finally got started