1HZ turbo suitabilty

[GQ4.8coilcab]

hey guys, Ive used the bible and cant find what i want. What ball bearing garret turbo would be best suited. I am looking at a GT25 internal wastegated. Any body used these. What about the disco potato GT28rs. Does anyone know how if it is possible to put the 12mm 12HDT plunger in the injector pump. Or just a boost compensator on the standard pump is enough. I want to run about 16psi. Is this too high. Is the motor not strong enough. Any help would be great?
Thanks Julian
Edit: forgot to add I will be running a front mount intercooler or barrel cooler if that makes a difference.

[GQ4.8coilcab]

nobody?

[Dzltec]

First of all you need to set a power figure you want to acheive. The mods will then be determined by that. A standard 1hz pump is only good for 90-100kw.
A boost comp needs to be fitted to keep exhaust emmissions clean under all conditions. Once you know your power requirements then comes matching a turbo to suit, then fueling requirements.

Yes a 12mm head and rotor can be fitted, but its not just a bolt in and away you go fitup.

I dont kow of any high powered 1hz's. You may have to be a guinea pig to find out.

Hope this helps

[Dzltec]

First of all you need to set a power figure you want to acheive. The mods will then be determined by that. A standard 1hz pump is only good for 90-100kw.
A boost comp needs to be fitted to keep exhaust emmissions clean under all conditions. Once you know your power requirements then comes matching a turbo to suit, then fueling requirements.

Yes a 12mm head and rotor can be fitted, but its not just a bolt in and away you go fitup.

I dont kow of any high powered 1hz's. You may have to be a guinea pig to find out.

Hope this helps

[dumbdunce]

speak to west end diesel, they have built some fairly powerful, internally standard 1HZ's. Phill (slowhilux) off this board has a turbo'd, intercooled, 3" exhaust, boost compensated 1HZ running 14(?)psi, internally standard, and it goes hard. be prepared for sticker shock though, it is an expensive shop.

the limits of the pump in standard trim depend on how much smoke you are prepared to put up with (and to some extent, how religiously you change your oil). I have turbo'd 1HZ's with no boost compensation, running 9psi with no intercooler, EGT's around 520C MAX, and almost no visible smoke off boost, sure you can get more go out of it by turning up the fuel but it doesn't need it - there is a reasonable balance to be struck. with the right turbo and exhaust, boost is available right off idle so smoke is minimal even without boost compensation. I have used the ceramic turbine, ball bearing nissan-imitation-garrett from 300ZX on several 1HZ's with good success (ask DX80, or surfection/ferog).

as Dzltec says, find a turbo that makes the sort of power you intend to achieve, or about 10 - 15% more (indirect injection robs a lot from the boost) and work from there. If you are building custom, the good news is you can build a VERY short adaptor from the standard manifold - about 35mm long from memory, just long enough to have the manifold studs clear the turbo flange. you could probably go shorter if you trim a bit off the manifold studs. that's enough free hints!

cheers

DD

[GQ4.8coilcab]

thanks for the info. I want reliability but I want to keep up to the 1HD. Is this possible. I am thinking gas aswell. Everyone has boosted TD42's (35psi and more) but i cant seem to find any info on the 1HZ. I might be the guinea pig if i pass the hat round and you put in for the new motor

[ads80]

i am running 1hz with 25-30 psi no probs so far motor has balanced turbo pistons,crank and rods all seems to work good just hope it lasts

[Chucky]

i am running 1hz with 25-30 psi no probs so far motor has balanced turbo pistons,crank and rods all seems to work good just hope it lasts

Have you dyno'd this engine?

If so what sort of power are we talking about.


I run 16psi in my 1hz and it goes hard, would love to heard how one goes with 30psi

[tuff 75]

i had a 1hz in my old ute with a dts top mount ic, denco turbo 13psi compensator 3 in exaust and made 152 rwhp with 35s ad 1200 lbs or torque bit smoky down low but it hammerd for a 1hz... The boys at chapmans set it up for me... If u go 2 cruza park u will know who they are.. ( that was the pump maxed out)

[ads80]

depends on the dyno, they all seem to vary??? but is around 170+ rwkw and massive amounts of torque . it only ever gets to 30psi at around 5000rpm makes around 23ish no probs by around 3000rpm then builds slower from there depending on how loaded it is.

[GQ4.8coilcab]

i had a 1hz in my old ute with a dts top mount ic, denco turbo 13psi compensator 3 in exaust and made 152 rwhp with 35s ad 1200 lbs or torque bit smoky down low but it hammerd for a 1hz... The boys at chapmans set it up for me... If u go 2 cruza park u will know who they are.. ( that was the pump maxed out)

was this a reliable set up. Did it over heat with that much boost. Sounds good you made 152 at 13psi

[slowhilux]

I got DTS kit on mine, 3" mandrell ex, compensator, and PWR front mount i/c, at 10-11psi it makes 105rwkw, with 315/75 tires, max egt as it is now it just touches on 500deg. Before all this happened the atmo 1hzzzz made a mighty 46rwkw

Oh, Brian allready explained all that

[Dzltec]

ADS 80 care to post a dyno sheet of your vehicle, I have never heard or seen one so high, sounds like you have a monster turbo on it .

[ads80]

dont actually have a sheet, perhaps you can give me one if i make it to your dyno day, if the car still drives arter rnd1 engel series will do my best to make it, by the sounds of your comment i just might win a prize

[balzackracing]

run 18 pound in mine, break piston ring lands using acl pistons. can't fit 1hdt pistons in a 1hz with out changing to 1hdt rods, different gudgon size's.

[GQ4.8coilcab]

run 18 pound in mine, break piston ring lands using acl pistons. can't fit 1hdt pistons in a 1hz with out changing to 1hdt rods, different gudgon size's.

that did run across my mind and the answer is no

[tuff 75]

yea mate with the 152 rwhp at 13 psi it was reliable i did 40 000 klms with it like that and did oil changes every 4 thousand ks just 2 be on the safe side had a phyro and boost guage egt i never let it get over 500 but u could get it to 400 quick but hard 2 get over 500..... it was a nice amount of power with out going over board.. put it this way 1 mate had a falcon and the other a comodore and i was quicker than them untill bout 95klmhr

[tuff 75]

here is a dyno sheet for anyone who cares

[tuff 75]

and not once over heated as i allways made sure all of the cooling system was spot on

[GQ4.8coilcab]

that sounds good, you had to be have happy with that power output. Does anyone know what turbo denco use?

[tuff 75]

the one i had was a schwitzer turbo bud

[Dzltec]

Ads 80, bring it on down, even if you cant make it for the day drop by and we will do one any way. I am very curious to see it.

[ads80]

wont b till after rnd 1 anyway very busy till then the car will b at the swap meet coming up at yarra glen if ure keen 4 a look

[Dzltec]

Yeh I am whens the swap meet?

Thanks Andy

[ads80]

swap meet + show n shine sun 4th march yarra glen showgrounds

[Chucky]

I got DTS kit on mine, 3" mandrell ex, compensator, and PWR front mount i/c, at 10-11psi it makes 105rwkw, with 315/75 tires, max egt as it is now it just touches on 500deg. Before all this happened the atmo 1hzzzz made a mighty 46rwkw

Oh, Brian allready explained all that

This is same that I run, except I have a top mounted I/C at 16psi on 33's.

I haven't dyno'd it yet, will one day.

ETG never goes over 500. And has run on this set up for nearly 4 years.
Never had a problem with teh engine except for a water pump and collasped battery.
Blows bugger all smoke and goes hard.
I love it.

[dumbdunce]

I got DTS kit on mine, 3" mandrell ex, compensator, and PWR front mount i/c, at 10-11psi it makes 105rwkw, with 315/75 tires, max egt as it is now it just touches on 500deg. Before all this happened the atmo 1hzzzz made a mighty 46rwkw

Oh, Brian allready explained all that

still only 11psi? come on, let's BOOST it!!

[slowhilux]

Would like to shove another 3-4psi in it, but she "breaths" a little heavy. Not sure if it has somthing to do with craps baffles in the rocker cover or not. Doesnt use any oil either. Anyone pulled the cover off and made new baffles?

[dumbdunce]

Would like to shove another 3-4psi in it, but she "breaths" a little heavy. Not sure if it has somthing to do with craps baffles in the rocker cover or not. Doesnt use any oil either. Anyone pulled the cover off and made new baffles?

too much blowby? maybe a leakdown test before you boost up. if there's just too much oil spray, a catch can will clean it up. There's always some oil there. an engine "using no oil" just means it is burning its oil at the same rate that it's adding contaminants - water/CO/HC/Fuel from blowby etc.

boost it hard, it's only a motor, if it holes a piston you can rebuild it with turbo pistons and then boost it harder!

[slowhilux]

Have a catch can, it mists up quite a bit with a filter on it, but mow i have it returning into the intake, with the drain Tee-d into the turbo drain. I mite fill the can with steel wool, to slow down the rate the oily mist enters back into the comp. housing (and cooler/pipes). I know its only a motor, problem is if it shit itself, i would find it real hard to find the funds to rebuild it. Damn houses, always slow down the spend rate on toys