More power for 100 series Landcruiser

Submitted: Thursday, Apr 16, 2009 at 21:22
ThreadID: 67915 Views:4776 Replies:4 FollowUps:1
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I have a 2002 model Land cruiser 4.2 litre diesel non turbo which is under powered. Can any give there opinions on putting extractors and a bigger exhaust. Or does anyone have any other ideas of how to get more power
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Reply By: Member - Nick (TAS) - Thursday, Apr 16, 2009 at 22:15

Thursday, Apr 16, 2009 at 22:15
You can it a bigger exhaust and extractors for stuff all power gain, as I did.Then when you realise you have wasted your money on them you wish you had put it towards a turbo I did.Its the only way to get decent power from a 1HZ but be warned you will shorten the life of the motor if done wrong.
AnswerID: 359896

Reply By: Horacehighroller - Friday, Apr 17, 2009 at 10:24

Friday, Apr 17, 2009 at 10:24
I had a wonderful HZJ 80 which served me faultlessly for 325K.
I put extractors on (with the standard exhaust) when the engine pipe burnt out.

It was louder and didn't start to run out of breath after 3,000 RPM
but at lower revs I couldn't decide wether it went better or was just louder.

For my HZJ 105 lemon I can't decide wether it's worth turbo-ing or putting onto dieselgas.
If the gas people are to be believed the power increase will be the same (as turbo) while the initial cost and fuel use will be lower.

AnswerID: 359954

Follow Up By: Member - Shane D (QLD) - Friday, Apr 17, 2009 at 19:54

Friday, Apr 17, 2009 at 19:54
The gains from Diesel gas (I believe) would only be around 10%, other motors respond well to deisel gas, 1HZ's dont seem to get the gains. big upshot is that overtime ( along time), the deisel gas conversion will pay for itself.
Turbo will give great improvement in performance, little difference in fuel economy, but never pay for itself, except for fun
I put extractors on a petrol (3F) cruiser(I know, totally different kettle of fish) and found that it revved out really well, good for overtaking in 3rd, but lost bottom end torque, no good for 4WD.
My understanding with fuel econmy , is if it use's 15l/100ks of straight deisel, the gas will replace 3-4 liters/100, so now it will use 11-12liters/100 deisel PLUS 3-4l/100 gas, still 15l/100 overall.
FollowupID: 627943

Reply By: Krakka - Saturday, Apr 18, 2009 at 11:25

Saturday, Apr 18, 2009 at 11:25
Go the turbo, I did and have NEVER regretted it. As Nick says, make sure it is done properly, eg. not too much boost, mated to an exhaust upgrade etc, you can't believe it is the same truck you had been driving previously. Even just day to day driving the difference is amazing.

AnswerID: 360129

Reply By: gezza100 - Monday, Apr 20, 2009 at 14:51

Monday, Apr 20, 2009 at 14:51

I went the exhaust option, wasted that money and ended up with a turbo system.

The turbo is the way to go, you will never look back, as stated by everyone else, dont go over the top with the boost and you will be fine.

I replaced the big end bearings at the time of the turbo install, 3inch mandrel pipe and its magic.

Good luck
AnswerID: 360535

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