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WHAT TO DO WHEN YOUR SIERRA HAS NO BERRIES

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zook95

az supporter

Joined: Mon Dec 13, 2010 7:07 am
Posts: 635
Location: wauchope NSW

Posted: Tue Feb 01, 2011 9:13 am

as the title states my 92 widetrack flat to the floor 5th gear does max og 95 on the highway and im runnibg 31'' muddies

shakes

Joined: Sat Apr 10, 2010 11:30 pm
Posts: 4895
Location: Northcote

Posted: Tue Feb 01, 2011 9:15 am

have you done anything to the car gearing wise?

what rev's are you doing while on the freeway?

89_tintop

az supporter

Joined: Fri Aug 07, 2009 11:30 pm
Posts: 3159
Location: gold coast

Posted: Tue Feb 01, 2011 9:16 am

Is that on the speed?? Or a gps unit

Got any transfer gears or diff gears in it??

Mine use to run out of puff at about the same point till i put the 6.5s in then was able to wind it out to 140 before i backed off

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Last edited by 89_tintop on Tue Feb 01, 2011 9:18 am, edited 1 time in total.

Ben_Sierra

az supporter

Joined: Wed Sep 30, 2009 11:30 pm
Posts: 4472
Location: Perth

Posted: Tue Feb 01, 2011 9:17 am

zook95 wrote:

31'' muddies

Firstly, if you're running 31s then 95 on the speedo is 110 when corrected for tyre size...

Secondly, 31s are much bigger that stock. Correct the gearing and she'll go much better...

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zook95

az supporter

Joined: Mon Dec 13, 2010 7:07 am
Posts: 635
Location: wauchope NSW

Posted: Tue Feb 01, 2011 9:18 am

im not to sure i havnt done it but the guy before me may havo how do i find out???

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atari4x4

az supporter

Joined: Mon Dec 11, 2006 10:30 pm
Posts: 34842
Location: East Radelayed
Vehicle: SV420+SV620 Vitara's

Posted: Tue Feb 01, 2011 9:21 am

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alien

Joined: Wed Mar 24, 2010 10:30 pm
Posts: 16343
Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.

Posted: Tue Feb 01, 2011 9:21 am

tell us what RPM you're doing in a few gears for a few different speeds, we'll be able to tell you right away.

eg: 60km/hr, 4th = 2500rpm

etc.

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zook95

az supporter

Joined: Mon Dec 13, 2010 7:07 am
Posts: 635
Location: wauchope NSW

Posted: Tue Feb 01, 2011 9:30 am

in 5th gear id say without not being sure approx 90-95 and around 4k-4,500k
only estimating but sure will take it for a test tomorow to have a look with all gears

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zook95

az supporter

Joined: Mon Dec 13, 2010 7:07 am
Posts: 635
Location: wauchope NSW

Posted: Tue Feb 01, 2011 9:31 am

proberly should have got this info befoere i posted this trhead but meh..

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Rusho

Tubby Elfsdong

Joined: Sun Aug 02, 2009 11:30 pm
Posts: 6501
Location: Northside, Brisbane
Vehicle: Coily Sierra

Posted: Tue Feb 01, 2011 9:39 am

zook95 wrote:

in 5th gear id say without not being sure approx 90-95 and around 4k-4,500k

That is what mine revs at. I have 30's 6.5 gears and I do 100km/h @ approx the same revs. However, my speedo says 90km/h

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alien

Joined: Wed Mar 24, 2010 10:30 pm
Posts: 16343
Location: Perth
Vehicle: '92 Sierra, 1.6efi, SPOA, 31s.

Posted: Tue Feb 01, 2011 9:46 am

yeah based on that i'd say its definitely got some gearing done...

you'll most likely find that as ben stated above - 90km/hr with 31's is really 107km/hr... so 4000rpm at 107km/hr is more like a 6.5 transfercase - and most likely the sierra's horrible aerodynamics combined with the weight of 31" tyres is why you're struggling to go much faster.

this said though - a good exhaust and extractor set up (if it doesnt already have one) will make a great improvement, as will checking your leads, carby tuning, air filter etc.

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smiffkid

az supporter

Joined: Fri Aug 13, 2010 12:55 pm
Posts: 3266
Location: perth wa

Posted: Tue Feb 01, 2011 1:10 pm

1.6 conversion,

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inbits

Joined: Mon Sep 13, 2010 8:30 am
Posts: 600
Location: qld

Posted: Tue Feb 01, 2011 6:51 pm

My old Sierra could sit on 120kmh without a problem I could drive over the gateway bridge at 90-95kmh in 4th and that was on 31's with s1 gears and 3.9 diff gears
It sounds like it needs a good tune and a decent exhaust/extractors

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