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Lowering rpm

Tech Talk for Cruiser owners.

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Posts: 101
Joined: Sat Feb 21, 2009 8:27 am
Location: Brisbane

Lowering rpm

Post by Feass »

Hey,

Just wondering what diff ratios are on the 78 series tray back, i got the 1hz, its a 2002 aswell.

I am wondering what can be done without going to extremes to lower the RPM at 100k's. I have 275/70/16s on there at the moment and it just rev's a little hard on the highways.

thanks
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Joined: Sun Jan 21, 2007 12:22 pm
Location: Woodford QLD

Post by cozzav8 »

What RPM does it do??
79 Series RV, 305 Mickey T's, 2" OME, 3" into twin 4" stacks, LOL, Love it
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Posts: 101
Joined: Sat Feb 21, 2009 8:27 am
Location: Brisbane

Post by Feass »

2500 give or take a few.

I just seems like it going through the fuel and reving its tits off?
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Joined: Fri Mar 28, 2008 4:45 pm
Location: SYDNEY

Post by thehanko »

go up a size in tyre if they will fit, 1 inch diameter will reduce your revs by about 750 rpm.

so going from your 31's to 33's would reduce it by 1500 down to 2350.

diff gears arent too cheap which is another option.

can a gearbox gear be swapped out?

either way a set of tyres would probably be the cheapest option and least effort IMO. and an excuse to go to 33's :lol:
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Location: gladstone

Post by hoppy's79 »

I run 35's on my ute it revs at about 2200 roughly but use's more fuel because it's working harder to turn the tyre's doesn't seem tomake sense but that's what happens. a mate of mine runs 35's on his 75 and he put reduction gears in, think he went to 4.8's instead of 4.11 or whatever it is standard and it revs higher but use's less fuel and is better off road
Ladncruiser 79 series.
turbo/intercooler
Coil conversion, 4 link setup
4" suspension lift, 2" body lift
Front & rear arb air lockers
35" maxxis mudzilla's.
Pro comp extreme alloy's
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Posts: 43
Joined: Sat Feb 07, 2009 11:57 am
Location: gladstone

Post by hoppy's79 »

Diff gears will set you back about $550 per diff providing that you can fit them on your own with the backlash etc. if you did want to go higher. my mate got his from marks 4wd adapture's that or terrain tamers are a good brand also
Ladncruiser 79 series.
turbo/intercooler
Coil conversion, 4 link setup
4" suspension lift, 2" body lift
Front & rear arb air lockers
35" maxxis mudzilla's.
Pro comp extreme alloy's
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Joined: Tue Jul 08, 2003 4:51 pm
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Post by MUSS »

thehanko wrote:go up a size in tyre if they will fit, 1 inch diameter will reduce your revs by about 750 rpm.

so going from your 31's to 33's would reduce it by 1500 down to 2350.

diff gears arent too cheap which is another option.

can a gearbox gear be swapped out?

either way a set of tyres would probably be the cheapest option and least effort IMO. and an excuse to go to 33's :lol:
best and cheapest option :armsup:
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