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14th November 2014, 07:06 PM
#1
High Revs
Hey guys.
I have a question for all the gurus out there.
I ZD30 engine recently grenade, so I put a reco'd ZD30 back in. I have noticed now that if it is started cold (haven't run it in 12+hours) that the revs sit higher for the first 10 minutes. Normally when cruising on the freeway at 100 my revs sit at about 2200, but in the first 10 minutes or so it now sits at about 2500-2600. I told my mechanic about it who had a look, but sure enough it didn't bloody do it when he looked. He said that it was probably just the tacho sticking. but I can audibly hear the change of revs when it drops from 2500 to 2200. it isn't a slow drop either, its instant.
Just need to know if this is something I need to be worried about. Last thing I want is to be forking out another $10k for another engine.
Any advise would be appreciated. cheers
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14th November 2014 07:06 PM
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14th November 2014, 07:26 PM
#2
Patrol Guru
Auto or manual?
Hi Goliath.
Is the Trol an auto or manual? If its an auto maybe overdrive is not being engaged until it warms up. That would explain the drop in revs.
If manual then I can't even try to explain it.
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Golioth (18th November 2014)
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14th November 2014, 07:28 PM
#3
Expert
I take it that it's an auto, if so mine does the same, when the revs drop it your torque converter locking up. Which it won't do until it's warmed up
03 ST-L auto, Dawes and needle valve, provent catch can, 3' exhaust. I want more than I got
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Golioth (18th November 2014)
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14th November 2014, 07:39 PM
#4
Legendary
Originally Posted by
Paule
I take it that it's an auto, if so mine does the same, when the revs drop it your torque converter locking up. Which it won't do until it's warmed up
Ditto on my ZD30 auto. Drops revs about 10 mins into my freeway run to work and again coming home.
2005 GU IV ST 3.0. Snorkel. Roof rack. Awning. Spots. Welded I/C. Dual batteries & VSR. UHF. Barn door hinge extension. Roof top spot lights. Rear drawers. 2" lift. NADS. EGT and boost gauges. Trans temp and water temp gauges. Provent 200 catch can. Rear ladder
And crawling on the planet's face, some insects called the human race. Lost in time. And lost in space... and meaning.
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Golioth (18th November 2014)
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15th November 2014, 07:42 AM
#5
Patrol Guru
Thats normal for an auto, the torque converter wont lock up till it reaches operating temp.
2010 TB4.8, 5 speed auto TI Wagon, Beaudesert ceramic coated Extractors and 2 1/2 inch exhaust, 3inch lift, BP-51 shocks, Black hawk radius arms and drop boxes, Road Runner Offroad billet alloy draglink, Boss air bags, 295/70/17 KM3s, Redarc Gauges, GME XRS UHF, Autometre fuel gauge, Alpine head unit with offroad maps, Carbon winch, Opposite lock bull bar, Light Force Strikers, Safari Snorkel, Duel long range tanks, work in progress.
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Golioth (18th November 2014)
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15th November 2014, 07:48 AM
#6
Patrol Freak
07 crd,,bridgestone 697lt, 2.75 buedesert ex,
SOLD theres a lot of my blood, sweat and money in that troll.
92 gq ti tb42efi my brothers gq extractors dual batteries brake controller uhf alloy bullbar
SOLD with a heavy heart but gone to a nice young fella
13 y62 the beast that burbles
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Golioth (18th November 2014)
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15th November 2014, 08:51 AM
#7
Legendary
Couldn't do it if it was a Manual ..... only if clutch as slipping when cold .... therefore it must be Auto
GU PATROL 2011 Ti, with goodies...
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Golioth (18th November 2014)
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15th November 2014, 09:12 AM
#8
Patrol Freak
As above. I have a ZD30 with a manual in it and it sits around the 2500 rpm at 100 Ks or so.
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Golioth (18th November 2014)
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15th November 2014, 09:23 AM
#9
The 747
My Corolla does it too.... lol
When I bought the Corolla it had a dodgy thermostat in it so it would not get to temperature, the torque converter would not lock up at all on a 25 min drive to work, now it gets to temperature and about 3 mins it locks up.
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Golioth (18th November 2014)
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18th November 2014, 06:38 PM
#10
Thanks everyone. yeah its an auto. great to know that its nothing I need to worry about. you all have really put my mind at ease. thanks guys
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