[bazook]

ive just bought 6.5.1 transfer gears and i have 32 x 12 x 15 tires and all this is in a wt so ive got 3.7 diff gears
now problem i have is i wondering if i put in nt diff gears in will this bring my revs down a bit cause on the higway at 110 revs are at 3,700rpm

[royce]

no it will rev more, 3700 is a pretty sweet spot for a sierra anyway

[steve]

110 KPH in a Sierra!!??

i'd be more worried about keeping it in one lane rather the revs

[joeblow]

anywhere between 3600 and 4000 rpm is fine.

[lump_a_charcoal]

Anywhere between the gutter and median is also fine...

[just_cruizin]

That's why I tell people Sierra are that small, they need to be to keep them in one lane

[BlueSuzy]

wtf are u guys on about, the rough roads mine doesnt follow much more then my civic on 18"s..

My 1.6, 6.5.1, 33'x12.5 @ 130km cruise wit 1 finger comfortable smooth roads....No p/steer..want more go? Still enough revs to drop into 4th....

[Mike]

i've seen a 1.3 sierra with 31s and standard gearing do 120

[BlueSuzy]

Mate has been booked stocker at 138Km hr....Downhill prob with a tailwind

[Mike]

BlueSuzy wrote:

Mate has been booked stocker at 138Km hr....Downhill prob with a tailwind

slip streaming helps too

[hooki]

complete stock coil sprung zook at 150kph was the fastest i could get it...lol. in a safe and legal environment of corse.

[royce]

140 in a 1 litre 4 speed with 31's and stock gearing

[bazook]

170km in safe conditions (on dyno)thats with stock tires without geared transfer case and with a 120hp gti turbo in front

thanks guys for the info

[Damo]

bazook wrote:

170km in safe conditions (on dyno)thats with stock tires without geared transfer case and with a 120hp gti turbo in front

thanks guys for the info

I doubt it would ever be able to do that on the road. 170kph and the bricklike profile of the Sierra body causes a lot of deag.

[norm]

aww the momries of going fast in a zook.
when i first got her, used to get 130 to 140km/h on the clock easy.
thats rollen on 35s, so its out about 25kms..

now with this stock vit motor only gets up about 90 max on the clock..
5th gear on 2700rpm

[Hybrid]

I'm with Bluesuzy here. I used to do 100km a day on the M1 at 110-120kmh. When I first got it it wandered a bit but mainy due to the wind. I put in some caster wedges and the 15000kms since she drives straight as an arrow. the wind blows the body around on the swprings but it still tracks straight.

With my 30s and transfer gearing 100-120kmh = 3500 - 4000rpm. Wouldn't mind dropping them a little though as 3500 is where it starts making a hell of a racket. I'm hoping the bigger tryres brings it down to the 3200-3300 mark.

[lump_a_charcoal]

caster is front to back right?

[Damo]

Hybrid wrote:

I'm with Bluesuzy here. I used to do 100km a day on the M1 at 110-120kmh. When I first got it it wandered a bit but mainy due to the wind. I put in some caster wedges and the 15000kms since she drives straight as an arrow. the wind blows the body around on the swprings but it still tracks straight.

With my 30s and transfer gearing 100-120kmh = 3500 - 4000rpm. Wouldn't mind dropping them a little though as 3500 is where it starts making a hell of a racket. I'm hoping the bigger tryres brings it down to the 3200-3300 mark.

Unfortunately the torque peak is closer to the 4000rpm mark, but with the 1600 you should be OK.

[Damo]

lump_a_charcoal wrote:

caster is front to back right?

Yep

[Hybrid]

lump_a_charcoal wrote:

caster is front to back right?

Yeah front to back. Technically my steering plain is higher at the front and lower at the back than stock. I got hilux wedges from snake racing and cut them down but I found superior engineering ahd them ready made for the zuk when I put them in my GF's sierra.

[joeblow]

norm wrote:

aww the momries of going fast in a zook.
when i first got her, used to get 130 to 140km/h on the clock easy.
thats rollen on 35s, so its out about 25kms..

now with this stock vit motor only gets up about 90 max on the clock..
5th gear on 2700rpm

...5th gear 2700...90k's....definately not geared correctly. must go through the juice too...

[bazook]

what about putting 5.12 gears in the diffs

[norm]

joeblow wrote:

norm wrote:

aww the momries of going fast in a zook.
when i first got her, used to get 130 to 140km/h on the clock easy.
thats rollen on 35s, so its out about 25kms..

now with this stock vit motor only gets up about 90 max on the clock..
5th gear on 2700rpm

...5th gear 2700...90k's....definately not geared correctly. must go through the juice too...

yhe man she eats it prity hard hey,, its farrkked
no gearing ATM, just the 4.88s diffs and vit box/Tcase..
soon to get the gearing

[BlueSuzy]

When the caster is out yes it will want to steer all over the place...Mine is sorted i think..

Oh and wind is definately a different story

But a low brick with heavy wide tyres help..More then a 5"lift on stockers!

[Rockhopper]

royce wrote:

140 in a 1 litre 4 speed with 31's and stock gearing

What?!?! Where!?!? Off a cliff???

[royce]

nope flat no wind highway

actually it used to cruise on 110 loaded with camping gear too, got bang on 10l 100km as well

it was a freak, you can imagine my disappointment when I 'upgraded' to a slower 1.3

[Rockhopper]

I only ever drove my standard 1.3 to 110km/h. Anything after that would require the use of earplugs to drown out the noise of the screaming motor. Now with 31's on it, it'll still do 110 in 4th, but it takes a while to get there.