Hi Guys Lots of good info in these forums,
However can any body help me, i have a 91 hiace 3l with a run big end bearing (#4)therfore cracking the crank, motor had done just under 300k kms so thats not too bad i spose, Now i have got a new crank, bearings, gaskets, A recon ct-20 turbo manifolds every thing i need, pretty much. Apart from the bores have got a bit of wear in them and a couple of engine reconditioners have said once you bore and hone the 3l's they tend to drink a whole lot more oil because the steel is a lot harder, and they recommend sleeving the cylinders, cost of $700, it seems hard to believe because its the same metal in the casting and dont think 0.25mm in metal would change its properties. I could only think that when these engines were run in they didnt use genuine rings or didnt lower the boost and had glazed the bores? So any thoughts on this would be good so i can get up and running again,Cheers
Turboing 3l (2.8litres)
Re: Turboing 3l (2.8litres)
i had a look at this for mine a while back.
in short do not use the ct20 turbo for doing turbo conversion. basically they tend to run out of puff at 3000 rpm and the hiace sits at 3200rpm @ 100km/h. you really need a bigger turbo so it doesn't choke in the 3000-4000rpm range.
they get away with the ct20 on the hilux because it has taller gearing ie sits under 3000rpm@100km/h.
no idea on the bores. it depends on the servicing. if its been poorly serviced the bores may be partly corroded so they may not be a lot of metal between bore and coolant.
the rear bearing is a common problem especially if poorly serviced. crap oil or lack of oil changes is often what does it.
also while its in bits check the water pump, especially any scoring on the block behind the pump vanes.
with turbo you will get a bit of blowby, fairly normal. just fit a good catch can.
in short do not use the ct20 turbo for doing turbo conversion. basically they tend to run out of puff at 3000 rpm and the hiace sits at 3200rpm @ 100km/h. you really need a bigger turbo so it doesn't choke in the 3000-4000rpm range.
they get away with the ct20 on the hilux because it has taller gearing ie sits under 3000rpm@100km/h.
no idea on the bores. it depends on the servicing. if its been poorly serviced the bores may be partly corroded so they may not be a lot of metal between bore and coolant.
the rear bearing is a common problem especially if poorly serviced. crap oil or lack of oil changes is often what does it.
also while its in bits check the water pump, especially any scoring on the block behind the pump vanes.
with turbo you will get a bit of blowby, fairly normal. just fit a good catch can.
Re: Turboing 3l (2.8litres)
tweake wrote:basically they tend to run out of puff at 3000 rpm and the hiace sits at 3200rpm @ 100km/h. you really need a bigger turbo so it doesn't choke in the 3000-4000rpm range.
With more power you could just fit a taller diff.
Re: Turboing 3l (2.8litres)
Yeah i think it had a good service history before i bought the van, it had a complete renewal of the coolant system and new clutch and pressure plate and exhaust however i might open the exhaust up to help the turbo.
there doesnt seem to be any corrosion in the bores however there is a little corrosion behind the pump, as for the turbo it will suit for the time being and i might opt for a 1kzt turbo (need to make adaptor plate) later on as well as some intercooling might be a bit too much pipe work in a van and have a bit of lag.
there doesnt seem to be any corrosion in the bores however there is a little corrosion behind the pump, as for the turbo it will suit for the time being and i might opt for a 1kzt turbo (need to make adaptor plate) later on as well as some intercooling might be a bit too much pipe work in a van and have a bit of lag.
Re: Turboing 3l (2.8litres)
Are there any other turbos which fit the CT20 flange?
Other matches could be done with Garrett T25, IHI RHB5, Toyota CT12B etc, but they're all going to be a hassle to fit to the manifold.
Other matches could be done with Garrett T25, IHI RHB5, Toyota CT12B etc, but they're all going to be a hassle to fit to the manifold.
Re: Turboing 3l (2.8litres)
you could fit taller gears but then you make it slower. in stock form the hiace out does a hilux dispite having the same motor, untill you get up over 100km/h. tho with turbo and bigger gearing it wouldn't be to bad and proberly gain some ecomonmy.
watch the corrosion behind the pump. i have seen it where they chew that aera out into the water jacket behind. i'm not sure what year they came out with the other pump (different vanes) so you may want to upgrade thet if required.
big bore exhaust is a must. also you might want to mod the intake as it has a big silencer in it which will limit airflow and the stock intake location sucks heaps of dirt in. (been looking for a snorkel for mine).
intercooler would be nearly impossible as the raditor is virtualy full width between the chassis. you could go under but big risk hitting the pipes on things. water/air is possible, heaps of room over the motor and the small water pipes would get past the radiator. however cost is a big issue.
mayby a turbo off izuzu 2.8 would be a better size.
also the oil cooler off surf 2.4 or commerical 2.8 (dyna etc) would be good.
.....also while i think of it.....while you have motor apart fit the piston spray bar off the above motor.
watch the corrosion behind the pump. i have seen it where they chew that aera out into the water jacket behind. i'm not sure what year they came out with the other pump (different vanes) so you may want to upgrade thet if required.
big bore exhaust is a must. also you might want to mod the intake as it has a big silencer in it which will limit airflow and the stock intake location sucks heaps of dirt in. (been looking for a snorkel for mine).
intercooler would be nearly impossible as the raditor is virtualy full width between the chassis. you could go under but big risk hitting the pipes on things. water/air is possible, heaps of room over the motor and the small water pipes would get past the radiator. however cost is a big issue.
mayby a turbo off izuzu 2.8 would be a better size.
also the oil cooler off surf 2.4 or commerical 2.8 (dyna etc) would be good.
.....also while i think of it.....while you have motor apart fit the piston spray bar off the above motor.
Re: Turboing 3l (2.8litres)
piston spray bar?
Are you talking about the little oil squirters that spray the underside of the pistons?
they are already fitted.
All the stock Air filter bs will get turfed, i might blank the bottom off to stop it sucking up the dirt and just make a slight cowl beside the air intake beside the door and house an aftermarket filter in the original spot.
A guy from diesel + turbo in hamilton has fitted some water to air intercoolers and just run a couple of electric fans on either side reckons its magic. But the turbo and intercooler upgrade will have to wait, i just need to get my wheels back on the road asap, within reason .
I really need to know if any one has bored out their 3l say 0.25mm or 0.5mm and found that the rings didnt bed in or has increased oil consumption, cheers
Are you talking about the little oil squirters that spray the underside of the pistons?
they are already fitted.
All the stock Air filter bs will get turfed, i might blank the bottom off to stop it sucking up the dirt and just make a slight cowl beside the air intake beside the door and house an aftermarket filter in the original spot.
A guy from diesel + turbo in hamilton has fitted some water to air intercoolers and just run a couple of electric fans on either side reckons its magic. But the turbo and intercooler upgrade will have to wait, i just need to get my wheels back on the road asap, within reason .
I really need to know if any one has bored out their 3l say 0.25mm or 0.5mm and found that the rings didnt bed in or has increased oil consumption, cheers
Re: Turboing 3l (2.8litres)
Oh yeah with the gearing. The van has got Mags and a little bigger tyres bumping up the aspect ratio so the gearing was pretty good for under 3000rpm before it gave up the goat