Headers for HZJ78 (1 Viewer)

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cota0

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Jan 6, 2009
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Hello, I have a T LC HZJ78 tropicalized.
I'm trying to add more power but not with turbo and I'm thinking to change the headers.

Do you think it really increase power? How much?

Which one can I buy and where? I saw many of them in Australia but not to serve in Spain and the only shop in Europe I find (Cruisser Connection) is so expensive!

Thanks,
 
Welcome to Mud Cota0!
To be honest with you I really don't see the point of headers at the prices these guys are asking. If you are mechanically inclined you could rig a turbo for the price or put a good amount towards the cost of a turbo kit. Unless that is that you have a real aversion to sticking a turbo on? I really doubt how much power headers are really going to give on their own. I could sort of understand them on a vehicle as part of a complete tuning 'package'. Of course this is completely subjective - I have never driven a 1HZ engined vehicle with headers fitted, but I have driven dozens of 1HZ vehicles and my own HZJ78 with a turbo is now a very, very different vehicle!
Cheers,
Gil
 
Hello Gilglana:
thanks for your reply,
I drove a 78 with turbo&intercooler and it was incredible! I think this is the best thing you can do for this car but....
I've listening many consequences about this modification. Clutch & other parts of the car are not prepared for it and the live of car is reduced. All of us know it.
But, it's not the problem for my, I accept it. It's only an €€€€€€€€ problem. Here a turbo kit whit installation ups to 3000€ at least.

Au.
 
If what is holding you back is the €€€€€ then there are ways to do it cheaper... If you look on the diesel and 24v section of the form you will find LOTS of info on DIY turbos. You could also look at wreckers for a wrecked HDJ80 and get components. The longevity issue of course is there, but there are also plenty vehicles lasting literally hundreds of thousands of kms with turbos fitted. By fitting an EGT gauge and boost gauge as well as an aftermarket temperature gauge I try to monitor the engine and drive accordingly. Good luck with your quest for more power!
Gil
 
cota0 said:
Hello Gilglana:
thanks for your reply,
I drove a 78 with turbo&intercooler and it was incredible! I think this is the best thing you can do for this car but....
I've listening many consequences about this modification. Clutch & other parts of the car are not prepared for it and the live of car is reduced. All of us know it.
But, it's not the problem for my, I accept it. It's only an €€€€€€€€ problem. Here a turbo kit whit installation ups to 3000€ at least.

Au.
Click to expand...

Clutch?

Seriously dude, as Belemoth60 once said, "The replacement for displacement is forced induction, before combustion"

You dropped a wad of cash to buy that HZJ78. Pull another couple of Gs out of the bank and give the poor rig some air. Don't go over .6 bar and it'll still last so long that you'll get sick of it and buy a mall cruiser before it wears out.
 
clutch longevity is completely related to the right foot and the nut behind the wheel.

the amount of HP a LC puts out will not affect the longevity of the clutch but righting the clutch, trying to move 20,000 lbs, trying to move 38" tires buried in wet clay, trying to burn rubber in 3 gears... these things will kill the clutch (even with a stock 3B).

your engine will thank you for the turbo.

now, headers are designed to make use of HIGH rpms, (high horsepower street and track engines) to purge the system quicker of exhaust gasses but they also can kill bottom end torque.
 
I suspect that with the 1HZ, if you are going to keep it an naturally aspirated engine, one would gain way more power if you spent the money fixing up the intake side.. The intake manifold and all of the induction piping is a joke, especially the two hard 90 degree bends the air has to make in the manifold.. Engines are air pumps, and if you can't get the air into the engine, you can't pump it.

The reality is, the 1HZ is a de-tuned, cheaper version of the 1HD, and that nasty intake manifold is less of an issue if you are using a blower to push the air around those corners - you just need to run a little higher boost to make up for the pressure drop..

Wayne's correct about tuned headers in a gasser application - but I suspect the biggest benefit in a 1HZ would be to getting rid of the bad flow characteristics of the stock Toyota exhaust manifold - it's not quite as bad as the intake, but it's close..
 
Turbo

crank problems reason for selling turbo ..
when you boost those engines they do that
break cranks

,at the end of the day you brought a land cruiser if you a run of the mill joe a extra 20horse will make it all worth it

throw a set of extractors on it throw away that air box and get one of a (in Australia) ba falcon xr or something thats made to filter air not to stop, it take it to diesel injection place and get a tune and she will last for ever


or if you wish you brought a fire cracker go get a turbo toyboy ute
 
I'm in contact whit a seller in Australia, but they have serious questions about different headers left o right hand. I think not, but not sure.
Anyone knows the same headers for left o right hand 78?
Thanks.
 
gilghana said:
Okay - your '78 is LHD right? So headers that fit a RHD Australian vehicle should be no problem at all, as they will be shaped to avoid brake booster, clutch, steering etc which is all on the other side on your vehicle. IMHO it should be pretty easy...
Click to expand...

Gilghana:
I don't know what is LHD right.
My car is left hand and the headers I'm trying to mount are PACEMAKER for HZJ78 model PH12700, I think this model is for right hand but... I think it's possible for my!!! not?
Thanks.,
 
Sorry, my bad use of English - what I meant was that I was checking that yours (like mine) is LHD? "right" was only to indicate that I was questioning!

My point is that headers from a RHD Oz vehicle - where the brake booster, steering, clutch etc are running on the right hand side- near to the exhaust (exiting to the right on a 1HZ) should fit on a LHD vehicle where none of that is...

If you know what I mean........?
 
gilghana said:
To be honest with you I really don't see the point of headers at the prices these guys are asking. If you are mechanically inclined you could rig a turbo for the price or put a good amount towards the cost of a turbo kit. Unless that is that you have a real aversion to sticking a turbo on? I really doubt how much power headers are really going to give on their own. I could sort of understand them on a vehicle as part of a complete tuning 'package'. Of course this is completely subjective - I have never driven a 1HZ engined vehicle with headers fitted, but I have driven dozens of 1HZ vehicles and my own HZJ78 with a turbo is now a very, very different vehicle!
Cheers,
Gil
Click to expand...

Hello,

Gil is right. A turbo makes a difference in a 1HZ. Just let it "kick in" and the engine is unstoppable.

About headers, as far as I know, they just let the exhaust gasses out faster. The power increase may not be worth the noise they create in the process.

From what I have seen (and driven,) a turbo is the way to go with a diesel engine. Just check if it is the appropriate model for your rig.

My two cents.





JuanJ
 
Hello again:

Finally I find headers in Australia. They sent me for 500€, more cheapper than any place in europe.

img3417.jpg

img3418.jpg


The fit is easy, no special problem.

img3419s.jpg


img3421j.jpg


img3422.jpg


img3423k.jpg


And now only test it. Only take a round and seams no to be anything special :confused: . Waiting to take highway for testing torque & fuel.

See you.
 
cota0 said:
And now only test it. Only take a round and seams no to be anything special :confused: . Waiting to take highway for testing torque & fuel.

See you.
Click to expand...

They tend to work better with a straight through exhaust and with the fuel turned up a small amount.
My diesel shop says you can get 7kw from a 1HZ ,proven and tested on a dyno.

Headers will always work better at high rpm.
 
My mate put some pacemakers and turned the fuel up a little on his hzj79 seems to hold just that little bit better in the boggy sand
 
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