1HZ Turbo thread

[tmarx]

Becareful 1hz Not Designed For Turbo Toyota Made Ihdt For The Turbo Different Head Etc. Seen A Lot Turbo 1hz In Africa Most If Not All Gave Problem

Only the ones who have absolutely no idea what EGT's they are running...

 

[psweber]

1HZ turbo update

OK, took a picture of my turbo kit that Iam putting together fro some guys. For the most part it is all there except the adapter plate, the toyota OEM airbox cover and pipe, and a few little nuts and bolts - I am waiting for delivery any day now.

Hello lshobie,
Any update on how your kits worked out. I have a 2005 HJZ78 that I am thinking of putting a turbo in. I do quite a bit of wrenching and have done a lot or reading on turbos so this looks really interesting to me.
http://www.ebay.com/itm/T04E-T3-T4-...r_Truck_Parts_Accessories&hash=item2c6ffc222a
I am a little at a loss on the different turbos available and have been searching Ebay etc. This one looks like it would suit...
your thoughts or anyone elses that has more than .02$ worth

 

[ForealBoreal]

Save money towards a non Chinese turbo. But a gturbo or a real Garrett

 

[psweber]

From another thread:

Quote:
Originally Posted by lshobie
Any suggestions on what guys are running with their 1HZ's?

One fellow I talked to runs a GT25, a turbo supplier in OZ recommends a GT28 with .86 A/R.

...

My fuel economy leapt by 15% when I upped the gearing from 2500 to 2000rpm at 100km/h cruise. Having the boost to haul top gear at low rpms can save you a lot of fuel. "

...

1HDTs use GT28 sized turbo's on 0.63 rear ends and spool at approx 1800rpm and hold through to 3500rpm. Drive one if you don't believe me. The GT25 with 0.63 rear end spools at more like 1300rpm and holds through to a bit over 3000. Granted it doesn't have as much kick as the GT28 as the 28 obviously flows more CFM but it will provide much better low end response.

Thanks ForealBoreal
I am wanting to build a turbo system for my truck... two reasons... I like to tinker and also could use some extra power/economy. I understand all the houpla about getting a genuine Garrett however my $ won't allow it for now. The result I would like is the same as described in the quote above with the turbo starting to pull at about 1500rpm. I am not a high rev driver and am also looking to reduce my cruise rpm to 2000 or so. (Waiting to hear back from Safari... they said the shop would likely reproduce their 5th gear with a 50-unit reorder... more on that when I hear from them) So that being said my 1HZ does not like revs much over 3000(with me ). I am thinking that if I could start with a Chinese version and then upgrade to a Garrett at a later date. As my truck is currently in Africa I have to fly all my mods in so am paying through the nose for shipping and really just wanting to begin somewhere with turbo-wrenching.
Bottom line I am looking for advice on the numbers as I am not familiar with them. Here is another link to one.
http://www.amazon.com/Goddspeed-Universal-Turbo-Charger-48ar/dp/B004ASV7MS/ref=pd_sim_sbs_auto_4
If someone could let me know if it or the previous link I posted would work or if the numbers are way off and which ones.
just a turbo beginner here.

 

[Tapage]

Intake :3 inch Outlet: 2 inch Compressor trim: .50 ar
Compressor Wheel diameter: 66.72 /84.25 (big wheel) Turbine wheel diameter : 43.46 /59.20 Exhaust trim: .48ar

Interesting numbers .. still in the hot side ( turbine ) AR seems to be pretty small for your 1HZ IMHO

 

[psweber]

The others on here were talking about Garrett T25 and T28s which all seem to have smaller outlets. I realize this is not the defining factor looking online in order to get a 2 1/2" outlet I had to move up to a GT35 series of which most have 4" inlets I found this one which has a 3" inlet and 2 1/2" inlet and the other numbers seem to be close. Again I realize I am looking at off-shore production but at least this way I feel like I can get my foot in the door and move up to a "quality" unit later.
http://www.ebay.com/itm/GSP-GT35-T4...Parts_Accessories&hash=item58905871f5&vxp=mtr
All the info I get is appreciated... even the "don't buy cheap stuff"
Again just to be clear I want something that will come-on at a fairly low range and work up to 3000rpm or so. Chances of me going beyond 3500 are unlikely.

 

[GLTHFJ60]

I wonder if the exhaust flow of a 1HZ would be similar to a 4BT or a 4BD1T I bet they are.

What about trying a Holset HX25w, HX30w or H1C?

 

[Dougal]

You want a turbo with an intake (compressor inducer) of 40-45mm.

That one is 66mm. Far too big to deliver the boost at the rpm you need it.

 

[psweber]

Thanks very much! I love my truck.

The turbo is based on a GT32 but I dont give all the particulars as I am selling kits for the 1HZ now.

Louis, are you still selling the kits? If so PM me with a price.

 

[gbentink]

The others on here were talking about Garrett T25 and T28s which all seem to have smaller outlets. I realize this is not the defining factor looking online in order to get a 2 1/2" outlet I had to move up to a GT35 series of which most have 4" inlets I found this one which has a 3" inlet and 2 1/2" inlet and the other numbers seem to be close. Again I realize I am looking at off-shore production but at least this way I feel like I can get my foot in the door and move up to a "quality" unit later.
http://www.ebay.com/itm/GSP-GT35-T4...Parts_Accessories&hash=item58905871f5&vxp=mtr
All the info I get is appreciated... even the "don't buy cheap stuff"
Again just to be clear I want something that will come-on at a fairly low range and work up to 3000rpm or so. Chances of me going beyond 3500 are unlikely.

Installing a turbo is a lot of effort for it not to work optimally. Additionally, the 1HZ is a sensitive engine and really needs an efficient turbo that boosts well in low rpm without excessively low air/fuel ratios.

Turbine geometry and turbine housing geometry are key to provide the drive energy; but the match to the compressor is important not just interim s of flow but the rpm required for operation compared to optimal drive rpm range of turbine.

A Gturbo Grunter Stage 1 (latest spec) after tune 17:1 AFR at 1400 rising to 20:1 at 2000rpm and up, will make ~ 15-20psi boost pressure at 1400rpm and hold almost flat to 4000rpm. This is the kind of performance you should aim for.

 

[gerg]

I am all for doing your homework G for sizing turbos before mating them up. However, to say to the average joe that you should aim for the performance you get is a tad extreme dont you think? You have no doubt poured literally hundreds, if not thousands of hours into refining your set ups. The average guy should look at other engines with similar displacements and mate a turbo similar to a stock set up. To ask them to do more is unreasonable. Now, if your telling them how to specificaly match a turbo to their engine, as in compressor diameter and trim and the like, well that is another matter.

 

[TheBigBoy]

I am all for doing your homework G for sizing turbos before mating them up. However, to say to the average joe that you should aim for the performance you get is a tad extreme dont you think? You have no doubt poured literally hundreds, if not thousands of hours into refining your set ups. The average guy should look at other engines with similar displacements and mate a turbo similar to a stock set up. To ask them to do more is unreasonable. Now, if your telling them how to specificaly match a turbo to their engine, as in compressor diameter and trim and the like, well that is another matter.

I dont think anything he has said is unreasonable. Alot of good advice and info there. It mearly states that turbo choice on a 1HZ-T is very important. To big with too much lag down low, will require lower afr's to get it to spool propperly off the line. And we all know how HZ's and heat go together so well. Too small will cause inefficiency uptop. Ive tuned many 1HZ's with aftermarket turbo's. And read 14:1 down low many times. Gturbo is the first turbo to ever tick both box's on these engines. Lowest spool acheivable and efficient in high boost. Which is why we buy them.

 

[psweber]

Thanks guys for all your input. Lots of good info. I am quickly climbing the first rung of the turbo learning ladder ;p. I am a guy that likes to tinker and can't wait till retirement when I will have the time. I used to work in a machine shop and love to fabricate things so what is expensive to some is not that bad for me except making things like turbos is kinda outta my league at the moment. My budget on the turbo itself is <$500 minus about $100 shipping to me therefore ~$400 or less. I know I will be replacing it down the road but want to get started on the experience.
Thanks Johnny C for the idea of the Cummins turbos, looks promising and to gbentink for the tech input. I went to the gturbo site but nothing but contact info, but will write and see what I get.

I have taken your input and crossed that with my pocket book and come up with a few possibilites. If any of you want to take a look at the links and let me know what you think, that would be great.
http://www.ebay.com/itm/T04E-T3-T4-...PRESSOR-300-HP-BOOST-STAGE-III-/350658405709?
http://www.ebay.com/itm/H1C-HOLSET-...Parts_Accessories&hash=item2a2a43afea&vxp=mtr
http://www.ebay.com/itm/HX30W-35921...Parts_Accessories&hash=item2c6514706a&vxp=mtr
The volume of resource you guys provide is invaluable and saves so much time from the impossible task of going to turbo shops and trying to talk to guys who just say "don't try it your self let a pro do it"
Thanks, Paul

 

[psweber]

Turbo calculator

I found this turbo calculator on the web and punched in some numbers for my engine and the turbos I was looking at above. Here are the maps for the various turbos.
T04E-trim50: http://www.squirrelpf.com/turbocalc...3=135&intake_temp_4=140&turbo_n=1&map_sel0=77
Holset H1C : not in their list
Holset HZ30W: http://www.squirrelpf.com/turbocalc...=135&intake_temp_4=140&turbo_n=1&map_sel0=112
You might have to click [Refresh Maps]
Don't know if anyone else has seen this but a really cool tool though some of the info I was not too sure of, like the "target AF ratio" I tried both 14:1 and 17:1 and looks like the T04E-trim 50 is a good fit for me.
T3-trim50 full boost at 1800rpm and AF of 17:1
http://www.squirrelpf.com/turbocalc...3=135&intake_temp_4=140&turbo_n=1&map_sel0=77
Not sure what it should look like though I assume the line should go through the middle Your thoughts

 

[gerg]

And read 14:1 down low many times. Gturbo is the first turbo to ever tick both box's on these engines. Lowest spool acheivable and efficient in high boost. Which is why we buy them.

So this is exactly my point man. The age old problem of low spool or operating rpm effeciency, which do you focus on?. Its not a new problem. Telling newbs to just simply fix both is not an achievable goal. 14:1 afr at low rpm is again not unexpected if your turbo isnt boosting. Try lugging a truck without a boost compensator and measure the AFR and see what happens.

AFR of 14:1 is not a good starting point. It is way too rich. Remap to 20:1 I would also be weary of all of the ebay turbos you selected, simply because of their price tag. There have been many awful holset copys on the last few years with serously low quality bearings. I wouldnt trust any of them. If you got a genuine holset with 300k on it you would be better off. At least you would know what your getting.

The t3/t4 50 trim might work, but how early it boosted is a guess. I would think the 46 trim maps better actually. The stage 3 t3/t4 It has quite a large turbine, pretty much almost as big as the h1c. The small turbine a/r will give you high drive pressures early... how early who knows. Its an experiment. Geremy knows more about the turbine size/trim/housing relationship than anyone on the board here, so he would be better to speak about that. If you rebuilt it with garrett bearings and had it rebalanced I could see it holding together if you didnt boost it hard.

The h1c is way too big for a low rpm spool option.

EDIT: According to the squirrel calc the hx30 is too small of a compressor, but it is not accurate and according to dougal can flow 36lbs a min making it a good fit up to 3500rpm with tons of boost. Your map was based on 14:1. remap it 15psi to even 17:1 ( which is a performance ratio by the way), or even 20:1 for more safety. And again the quality is very questionable. Also, hX30s come in many turbine housing sizes. Not all are 6cm. The 6cm would for sure boost early.





If you want something that is a straight bolt on that will do everything you want, then get geremeys turbo. It will out perform any other aftermarket set up that I have seen.


If you dont mind building a turbo then here is a turbo 2h thread that might give you some ideas:
https://forum.ih8mud.com/diesel-tech-24-volts-systems/431805-turbo-2h.html

I personally would be looking into a stock td05h and putting a 16g large compressor on it. It has a 6cm exhaust houing that can be changed to 7 and 8cm giving you alot of tunability. But that is just me cus I like MHI turbos.

 

[TheBigBoy]

The problem here is the budget I guess. Save your $$ and just buy the right turbo once.

http://youtu.be/LLofJn6c3w0

Need I say more.

 

[Dougal]

The T04e is too big. The H1C is ancient in turbo terms. The HX30 will be okay.

The map on the squirrel calculator for the HX30 isn't right. The HX30 can do PR of 4 and flow of about 35 lb/min. Squirrels map only shows 26 lb/min.

 

[gerg]

Doug, I have wondered that for a while as it didnt even map right for the engines it was put on. Is there more than one hx30 compressor as well? I know that the turbines and housings differ. It is a really tuff little turbo to get the specs on. Do you have a map for the hx30 you could post up?

 

[Dougal]

Doug, I have wondered that for a while as it didnt even map right for the engines it was put on. Is there more than one hx30 compressor as well? I know that the turbines and housings differ. It is a really tuff little turbo to get the specs on. Do you have a map for the hx30 you could post up?

Yes the Holset Midrange Outline Compressor Maps show two different HX30 compressors.
One slightly more flow (expecting a slightly bigger trim there), the other slightly more pressure.

They are difficult to find any info on. The only accurate maps out there were scanned from a turbocharger book that I can't recall right now. All others are fake.

 

[ForealBoreal]

psweber,

its not worth risking your money for a Chinese turbo, too much unknowns.
your budget for a turbo is way too low.
For simplicity sake I would say just buy an off the shelf kit with everything included.
Less mucking about if you don't have the time to source everything.

your best route is the Gturbo in my opinion. I love mine and it suits the 1hz quite nice.

No point risking your engine with chinese junk that may explode and kaboom your engine.
Best to get a properly balanced name brand turbo.