Twin Turbo on TD42

Post by **Not For Highway Use** » Sun Dec 19, 2004 6:12 pm

I am looking at using two turbo's off 2ltr Jap import motors. I will be using scavanger extractors off cyl 1,2,3 and then 4,5,6. once through the turbo's they will be joined before entering the inlet manifold. Anyone tried this?? Any good web sites for info on setting this up? Any turbo's I should use??

Post by **awill4x4** » Sun Dec 19, 2004 9:52 pm

It seems a lot of complication for what is usually a very simple turbo install. The TD42's thrive on turbocharging and in nearly all circumstances a single turbo is the way to go. The only one I know of with twins is Mark Johnson of JPC and I think that was on a petrol 4.2 SWB and I hear on the grapevine that his new project will be a petrol 4.8 but that one will be running a single turbo.
It would be quite a squeeze fitting in 2 turbo's with exhausts down the LHS of the engine, 2 oil feeds, 2 oil drains, 2 air intakes to the turbos and the list goes on.
Personally, I think single turbo is the way to go but Hey!! If you've got the time and enthusiasm to give it a go then go for it.
Regards Andrew.

Post by **toughnut** » Sun Dec 19, 2004 10:19 pm

What is it to be used for? If its competition then you'll no doubt want to work on it quickly. 2 turbo's would creat a lot of heat under the bonet and as awill said there wont be much room to make any repairs quickly. BUT if this is to try something a bit different the go right ahead. I for one will watch with curiosity. :cool:

Post by **Red Rover** » Mon Dec 20, 2004 9:35 am

Keeping in mind that some of these turbos are designed for small capacity cars and run ceramic exhaust wheels. Small turbo on big engine will spin the turbo harder & the exhaust wheels have known to drop off......

Post by **GUJohnno** » Mon Dec 20, 2004 6:37 pm

There was a comp Patrol shorty in 4WD Monthly runnig twin turbos.

Post by **Daisy** » Mon Dec 20, 2004 6:53 pm

GUJohnno wrote:There was a comp Patrol shorty in 4WD Monthly runnig twin turbos.

on a PETROL VH45

Nice setup it was..

I think this threads related to a TD42 diesel engine

TOM

Post by **GUJohnno** » Mon Dec 20, 2004 7:05 pm

GQ wrote:
GUJohnno wrote:There was a comp Patrol shorty in 4WD Monthly runnig twin turbos.

on a PETROL VH45

Nice setup it was..

I think this threads related to a TD42 diesel engine

TOM

Yeah, I couldn't remember if it was or not..........

Post by **Hobzee** » Mon Dec 20, 2004 9:01 pm

Keen to see how twin turbos go. Thought of doing it too but keen to sit back and see how you go about it first. I have a few nutty turbo guys here who can offer some free advice (03 9705 6677) re sizes, etc.

Not sure what you want to achieve. I have Garret 04 and can get way more boost and flow than factory GU TD4.2 can cope with. Only gain I can see is low down early boost (would be nice) but if that's the case maybe supercharger (even belt driven turbine) would be cheaper and easier.

Funny thing happened to my motor the other day. Sold the o/head intercooler to make way for twin air/water I'coolers and plumbed up basic direct turbo to manifold 3" pipe to keep the rig on the road. Man what an improvement - now revs out to 6 g's and off to dyno for checking stats. Might not change anything now - anyone got a V8 and want to be embarrassed by a dsl ???

Will your pistons and pots cope? Might need to consider what motor you are starting with. GU TD42 is best for pistons, etc.

Hobzee

Post by **heathgu** » Mon Dec 20, 2004 11:13 pm

So how much power and Torque did you get at the wheels Hobzee

Cheers Heath.

Post by **Not For Highway Use** » Tue Dec 21, 2004 7:36 am

I am trying to achieve low end power, 1000 rpm onwards. I know that the small Nissan Turbo's are ceramic but are Toyota? The motor to be sacraficed is a 89 model TD42. I believe that these earlier motors will cope with more boost than the newer GQ motors. I am very interested in a how the water to air coolers go.

Post by **morkz** » Tue Dec 21, 2004 9:00 am

would you really need 2 turbo's so many guys are getting around 160kw + out of there gu's now some upto 200kw

one guy i saw was running a supercharger @6psi for low end then had the turbo kick in after 2500rpm

Post by **Evan** » Tue Dec 21, 2004 4:49 pm

160-200kw out of the 4.2 ?? that easy or a lot of work ?
wonder what you can squeeze out of the zd30
E

Post by **J Top** » Tue Dec 21, 2004 6:15 pm

"wonder what you can squeeze out of the ZD30"
A ConRod!!
J Top

Post by **Evan** » Tue Dec 21, 2004 6:27 pm

hahahaha
Have they been throwing rods ? i thought they were mainly destroying turbos and bearings, oil gallerys blocking up, 3/4 cyl overheating. (hmmm long list)
I only wonder because i need a new lease car and as i would only keep it 2 or 3 years i dont really think i would be too concerned about engine longevity.
E

Post by **GUJohnno** » Thu Dec 23, 2004 5:15 pm

Evan wrote:I only wonder because i need a new lease car and as i would only keep it 2 or 3 years i dont really think i would be too concerned about engine longevity.
E

I think you'll find there isn't a problem with the new vehicles as far as that goes.

Post by **Hobzee** » Fri Dec 24, 2004 6:44 am

Our Garrett was putting out 140-150 kw depending on tuning. Has extractor manifold, 4" air intake custom snorkel, large hi-flow air box, modified pump, 3" mandrel exhaust from turbo & no muffler and at present no I'cooler. I'm tipping we got another 10-15 kw (approx 165kw)when we took the I'cooler off (craaazy) and we got another 1000 revs out of her. Now it's quicker than my V6 VT C'dore whereas before it wasn't. D'ya reckon the c'dore might be on the way out???

Have bought the parts for twin Denco air/water intercoolers. Going to run a GU radiator behind the cab with twin thermos to cool the I'cooler water that way if I bugger the front radiator (coz it happens) then I have a spare. Will do a topic post when all done with before and after stats.

Post by **bogged** » Fri Dec 24, 2004 8:24 am

Hobzee wrote:Our Garrett was putting out 140-150 kw depending on tuning. Has extractor manifold, 4" air intake custom snorkel, large hi-flow air box, modified pump, 3" mandrel exhaust from turbo & no muffler and at present no I'cooler. I'm tipping we got another 10-15 kw (approx 165kw)when we took the I'cooler off (craaazy) and we got another 1000 revs out of her. Now it's quicker than my V6 VT C'dore whereas before it wasn't. D'ya reckon the c'dore might be on the way out???

Have bought the parts for twin Denco air/water intercoolers. Going to run a GU radiator behind the cab with twin thermos to cool the I'cooler water that way if I bugger the front radiator (coz it happens) then I have a spare. Will do a topic post when all done with before and after stats.

Sounds like a plan mr.. keep us informed!

Post by **bushedzook** » Fri Dec 24, 2004 12:00 pm

Are you guys talking flywheel kilowatts or rear wheel kilowatts?
I'm currently looking into turboing my td42 and would like 200kw at the flywheel. I'll use a garrett 450 or 400 roller turbo on custom equal length manifold and a PWR barrell water/air intercooler. The cooler comes in a kit with everything you need for a bit over a grand.
Anyone had any experiance with any of these components?

Post by **heathgu** » Fri Dec 24, 2004 2:52 pm

Most are rear wheel kilowatts.

Turbo Good choice, Manifold Good might sacrifice some low down torque with equal length manifold but good top end horse power.

The intercooler in my opinion will not be efficient enough for what you want. They are not big enough and the radiator they supply in the kit is small. JMO.

Cheer Heath.

Post by **toughnut** » Fri Dec 24, 2004 11:35 pm

Started to have a look at a WRX top mount intercooler. Has anyone done this before????

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