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What engine RPM @ 100 kph?

General Tech Talk

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What engine RPM @ 100 kph?

Post by Vineboy »

Just wondering what engine revs your fourby does at 100 k's.

Triton non-turbo manualon standard 16 tyres =2600rpm
Volvo auto= 1350rpm
HJ47 on standard tyres = 2850rpm
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Post by macca81 »

but it would depend on gearing.....
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Post by Vineboy »

macca81 wrote:but it would depend on gearing.....
I know thats why I'm interested to see what a differece it can make. Also tyre size, auto v manual, GLX v GLS etc.
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Post by chikoroll_ »

petrol auto jackaroo '98- 1800-2200rpm (depending on load)
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Post by -Scott- »

Pajero - NJ 3.0V6 manual with 33" tyres - about 2700rpm.
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Post by Gwagensteve »

Why do you want to know? What's it relevant to?

FYI - currently, my 660cc sierra runs Trail tough 6.4:1 transfer gears and 34" swampers, worn for about 33"actual height - runs 3360@100 in 5th, but if laden is more likely to be in 4th @ 4280.

Once I have the Q78's on it and the 5.12 diffs, it'll be spining 3947 @ 100 in 5th - much happier.

My Diesel G wagen spun 3750 with 31's on it at 100 and 3150 with 36's.
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Post by macca81 »

dunno with the new engine, as there is no tacho on it, but the old one was 3100 in 4th
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Post by RN »

Mav 4.2 petrol 2200rpm in 5th at 100kph. 3.9 gears, 31's
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Post by Pep »

Sierra 1.3L - RH S4 (6.5 reduction) - 30" AT - 5th 3600rpm
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Post by KiwiBacon »

Isuzu powered rangie.
2000rpm in 5th at 100km/h.
2800rpm in 4th at 100km/h.
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Post by Boss »

4.2 TD Patrol GU with 31's and standard diff gears 2300 @ 100 and 2500 @ 110
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Post by Red_Zook »

zook.. lux diffs and reduction gears...
4th was about 4560rpm
didn't have power for 5th
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Post by Loanrangie »

2.5 tdi auto 2250@100 kph.
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Post by trains »

Put in your specs here and see how they add up

http://members.optusnet.com.au/~zerosin/gearcalc.html

cheers

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According to the above, my speedo is out by 5kms, and my tacho out by a few hundred rpm.

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Post by g60boy »

macca81 wrote:dunno with the new engine, as there is no tacho on it, but the old one was 3100 in 4th
same here, mk l28 31's 100k's @ 3100 in 4th
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Post by j-top paj »

GU 4.5 petrol, 4.88 diff gears, 35s,

2500 @ 100k
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Post by Tapage »

Rigs in my sign

Tencha does 100km/h around 2400 rpm
Marilu Does 100km/h around 2500 rpm ..
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Post by stu »

my TJ with 4.56 gears.

33's @ 2300 rmp
35's @ 2150 rmp
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Post by Jeeps »

TJ wrangler with stock gearing and 31's

1800 rpm @ 100klm/hr in 5th
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Post by shanegtr »

1hz 80 series on 285/75 100km@2400rpm in 5th
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Post by dwaynes »

GQ 4.1s 35"s 2200@100
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Post by zagan »

Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
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Post by KiwiBacon »

zagan wrote:Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
EFI isn't quite that magical. It can't completely change an engines character.
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Post by cloughy »

zagan wrote:Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
:rofl: Your kidding right :rofl:

Maybe it'll change a few hundred RPM's on an auto without lock up convertor, but it wont change fark all else :roll:
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Post by nabstud »

GU1 4.5 auto stock gears 285/75/16 1700rpm@100km
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Post by -Scott- »

cloughy wrote:
zagan wrote:Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
:rofl: Your kidding right :rofl:

Maybe it'll change a few hundred RPM's on an auto without lock up convertor, but it wont change fark all else :roll:
Thanks cloughy - exactly what I was gonna say! :armsup:
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Post by Gwagensteve »

zagan wrote:Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
Thats the best outers post ever. :armsup:

Please, explain how, with a manual gearbox, in gear, driving down the road, how EFI can mysteriously change the relationship between the speed the crank is turning and the speed the input shaft of the gearbox is turning. Does a poor efi map slip the clutch?

Steve.
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Post by foster_the_fat »

HJ60 2H Auto (turbo), 2000rpm @ 100k. A little too tall to keep egt's low up moderate inclines and 3rd is 3000rpm @ 100k.
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Post by Hoppy11 »

Hummer replica, 3.8 ecotec V6 4L60E 4 speed auto, 4.6 diff 35in tyre

2000rpm @ 100km
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Post by Hoppy11 »

Gwagensteve wrote:
zagan wrote:Are these EFI engines?

If so it'll depend on the map on the CPU as it depends on what map you use as to what the rpm will be.

an example
a bad map might be 3000rpm for 100klm chew up heaps of fuel.

A good map might be 1500rpm for 100klm and use very little fuel.

Gearing won't mean much if the engine has EFI.
Thats the best outers post ever. :armsup:

X2 WTF

Hoppy

Please, explain how, with a manual gearbox, in gear, driving down the road, how EFI can mysteriously change the relationship between the speed the crank is turning and the speed the input shaft of the gearbox is turning. Does a poor efi map slip the clutch?

Steve.
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