GTurbo CT26 "Bad Boy" 1HD-T 24psi Boost Intercooled 201 wheel HP @ 3000rpm 35" Tyres

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G

gbentink

10 Year 15 Year
Joined
Oct 5, 2008
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Location
Perth, Australia
Held for 10 seconds to get a more realistic (higher) pyro number, pre turbo, done in 4th gear. eBay front mount intercooler.

I havent seen 200hp @ wheels on a 1HD-T before, so you could say I'm very happy :D

AFR's lean at 19.3:1 (usually for light haze exhaust power tune, 17.5 is ok) at the measured rpm point (3000) and above 19 from 1900 to 3100rpm.

Owner is modifying inlet manifold (boxing it out). I will provide photos to this, all instincts tell me it will lean off the AFR's further by evening the distribution of air between the cylinders.

After this, and the fittment of a Holley red in line fuel pump (as a kind of lift pump), it will be returned and afrs will drop to 17.5:1 for a power tune. On this basis, I would expect over 165kW, probbaly 170kW.

Owner is on holiday for a month or so (using this truck the whole time, so believe it or not folks, this is actually the "safe" tune) then will do the mods mentioned and a retune. Thats an excellent pyro pre turbo when sitting on 200whp!
201whp 1HDT.webp
 
Last edited:
Drooooooooool
 
Nice work! Can't even imagine 200hp, lol. It will probably be hard to estimate given the newness of it, but any ideas about fuel economy with that setup?

All the power tends to increase gravity around the go pedal. :D
 
esh said:
Nice work! Can't even imagine 200hp, lol. It will probably be hard to estimate given the newness of it, but any ideas about fuel economy with that setup?

All the power tends to increase gravity around the go pedal. :D
Click to expand...

So far some owners have commented no change at all in normal driving, and the tests have been pretty accurate. There is a GTurbo user here "Vegard" who has tested it and I believe the economy results were in line with what he has been seeing for a long while.

Mind you, as you say, with the new found power comes the will to use it - but hey, it's REALLY fun.
 
For mine, i am not with an extreme ip setup yet but it really push hard already, and i estimate having about at least 2l/100km of saving.

At the same time i changed the turbo i also changed the exhaust from SS 2.5" to 3" and from a 4wdbits IC to a crosscountry so it might as well have it's impact there too.:)
 
gbentink said:
There is a GTurbo user here "Vegard" who has tested it and I believe the economy results were in line with what he has been seeing for a long while.
Click to expand...

That is correct Graeme. I always calculate consumption and my 80 does not use more fuel after installation of your GTurbo (Grunter). I did install a large front mount IC at about the same time so that has to be taken into account also.

Now, I have seen some discussions about consumption numbers here on mud. Some people using little fuel tend not to be believed. I believe them.

To understand the low consumption I will post you should first know about the environment and speeds I mostly drive at, and the setup of the car.

My 80:
1996 1HD-FT
EGR removed.
285/75-16 BF Mud KM2.
Sits 5 cm (2 inches) higher than stock.
Has a 3" inch free flowing SS exhaust going between the frame and transfer box. 3.5" downpipe.
Normally it is empty, weight ~2500 kgs with me in it.
Odometer correction factor: +1.064 (multiple checks done with gps)
Pump tuned by me.
Manual transmission.
3.70 diff ratio (at 2000 rpms true speed is close to 90 km/h)

Normal driving:
Mainly to and from work, 2x26 kms, some shorter and some longer trips.
Speed: 60 - 80 km/h, typically averaging 65 km/h
Not many hills, but not entirely flat.
Summer temperatures: 10-25 degrees C.

During normal driving in the summertime my consumption is always between 9.5 and 10.5 liters. It was like this before Gturbo, and after.

I tried to go very low one week this summer, and I ended up with 9.3 liters, but this was not normal driving.

What amazes me, is that despite flooring it a lot (still not speeding much) I seldom go above 10.8 liters (this is not normal driving either)

This summer me and my family drove in Europe. Weight of the car was around 2900 kgs, three bikes were attached to the rear. Speed was around 120-130 km/h for sustained periods of time. Terrain was rather flat. Temperature was 15-25 degrees C. Consumption was 11.5 at the two occasions were I filled up after this kind of driving. I think this was impressive, and believe the consumption would have been higher with the original setup.

Yesterday the "Bad Boy" Gturbo replaced the Grunter. I expect this turbo not to affect consumption as long as I tune properly.
 
Vegard said:
Yes I am serious (to be accurate, the ratio is 3.73). This gearing is normal in European 80-series with manual transmission. The autos had 4.1.

My axle code is K304

This page explains what that alphanumeric code means: Toyota Differential Gear Guide
Click to expand...

I confirm on Vegard, My french 80 has the same axle ratio. HZ are delivered with 4.3, Auto 80 with 4.1 and manu 3.73, same for the 100 serie if i recall right:rolleyes:.

I am using 265 75R16 BFG mud, it really doesn't help to take the power to the ground, even on dry surface:steer::grinpimp:,
 
rear diff

1990-1998
HDJ80
(also FZJ80)

41201-69245 3.727

note:
41201-80119 3.583 (also available 96-98)



front diff

1990-1998
HDJ80
(also FZJ80)

41201-69225 / 41201-69226 3.727

note:
41201-80121 / 41201-80185 3.583 (also available 96-98)
 
I will make an attempt to bring this thread back to focus on Graeme's turbo :)

Yesterday I installed his "Bad Boy" to my 80-series with the 1hd-ft engine. I have only driven it to work today. The pump is not tuned for this turbo yet. What I experienced is that the turbo comes on to boost really easy. Throttle response is good. My digital boost gauge stores maximum values. I checked max boost at 1200 rpm, it was 0.5 bar! At 1600 rpms I saw 1.1 bar -no wonder it felt responsive. It might be that I am running too rich, but I don't think so.
 
Vegard said:
Yes I am serious (to be accurate, the ratio is 3.73). This gearing is normal in European 80-series with manual transmission. The autos had 4.1.

My axle code is K304

This page explains what that alphanumeric code means: Toyota Differential Gear Guide
Click to expand...

What size tires are you running with that 3.73 gearing and what are your RPM's at 110kph and 120kph?

Thanks
 
Ukaviator: The information you request is all there in my posting (#12). You can calculate my rpms at all speeds given the provided information that I run ~2000 rpms at 90 kph.

At 100 it becomes 2000x100/90 = 2222, at 120 it will be 2000x120/90 = 2666 and so on.
 
Vegard said:
Ukaviator: The information you request is all there in my posting (#12). You can calculate my rpms at all speeds given the provided information that I run ~2000 rpms at 90 kph.

At 100 it becomes 2000x100/90 = 2222, at 120 it will be 2000x120/90 = 2666 and so on.
Click to expand...

Ok thanks. And what size tyres do you have?
 
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