High Flowing Turbo?

Hey guys,

I have a 2005 GU 4.2l and was wondering if it is worth high flowing the turbo or just getting a new one and if so which turbo.

Any help would be great
Cheers Chris

Sorry Chris, I can't help you on this, I'm sure some of our other regular members will be along soon enough to help you out, in the mean time can you stop past the intro thread and tell us a bit about yourself and your rig.

A link to the introduction thread can be found in my signature thread.

Cheers

Todd

P.S: Welcome 2 the forum

I have very recently been researching this if you give me a brief run down of what you plan on doing with it I can give you some options that I have come across very interesting stuff :).

All i am doing is putting a 3" exhaust on, and seeing if it is worth highflowing the turbo.
so more or less asking is there much power difference
Cheers

If your looking for it then yes there's good power increases with correct fueling obviously and it will bring boost on earlier it makes them more efficient right across the range but it isn't cheap

I have only rang one place and they quoted me $1600 is that a bit rich for what there have to do?

Really depends on what they are doing for that price i would be looking for a more suitable turbo.
some of them will change a wheel and housing with another off the shelf unit and call it a high flow and rip you right off.

This might help explain it a bit better.
http://gcg.com.au/index.php?option=c...tuff&Itemid=99

Not really i have quotes here at trade price from 500 through to 2200 so that sounds alright do the ring around see who does what mods to the turbo and make your decisions from there :). The 500 is something along the lines of what 97_gq_lwb has stated and the 2200 is a full cartridge swapout with a fair chunk of machining being done to the housings.

Hey guys I got a quote today 4 a GTX2860 center fitted into the HT18 housing fitted & tunes 4 $4100.00 from MTQ sounds a bit over the top I drove his 4.2 with this mod but was only the GT2860 has heaps of grunt from low down your thoughts??

Dont bother with high end modifications to the HT18. The extent I would go to would be an exhaust side high flow if you are chasing anymore than that then a turbo swap out is the best option. And at that price a unit from united fuel injection will have you a lot more satisfied than modifying the standard turbo.

Have emailed them

Hi I have just fitted a safari turbo. Best thing i ever did. cost $2900 installed and dyno tuned. Throw the ht 18 away.

I had the turbo on my skyline hi-flowed years ago. Changed from ceramic to ball bearing and machined the hell out of it. Yes alot better than stock. Probably would go a whole new turbo if I was to do it again.

A mate just did the swap with i think the GT2860 supplied and fitted by JPC in Melbourne.

He drove out with 135rwkw and is very pleased with the upgrade. He would want to be though as he got no change from $4500. to add insult to injury, when he went back to get it they said that it was getting really hot EGT readings and they'd need to Dyno it????? WTF? You mean for $4500 and a Turbo replacement Drive in Drive out service they did not tune it? $440 for the Dyno tune! Ouch!

Yes its JPC but Really!!! Thats a bit Rude.

Thats is rude but those turbos are known for the high egt's

Another vote for Matt at United fuel I have one of his TD05s The 18G and I can tell you you will be very Impressed with the turbo and the service they give.

Hey Mr Fridge did u have it fitted or diy as a kit?

Diy as a kit

You really need to stay away from the so called high flowed turbos.
Either machining housings for a different CHRA or whatever.
The standard compressor housing is not large enough to cope with increased compressor flow. The turbine housing is not so bad, and croping of the turbine wheel can help but at the expense of response.

United do sell a good setup, but the Garretts are cheap.
With the dollars the way it is you can buy all you need to swap to a Garrett for less than $2k.
Not sure of the price of the United setups but they are a little dearer.
I have no preferance either way it just comes down to dollars which way you go.
Either will take about a day to fit if you are handy with some spanners.

A simple turbo change such as this, setup to run the same or even slightly higher boost would also be perfectly safe to drive without playing with other things.
Simply bolting either of the turbo's mentioned on will not create higher EGT's unless something is drastically wrong.


As for the comment that the Garretts are know for high EGT's, why do you say this?
They may not be ideal but.
I use the same GT28 turbine with a .64a/r T2 housing at a drive pressure of 1.3:1 on 30psi and have no EGT's issues.
If I'm lucky I might see 11-1200degF pre turbo.
I have held it at 3900rpm in 5th with a 285 tyre for upto 2km with egt's steady at 1120degF pre turbo.
Admittedly this is not a standard setup but it shows that the high EGT thing is a little bit of BS.

Marty

Cheers Marty
I do like how informative you are and are very knowlegable.
I will try and clarify it a little. Yes the state of tune could be the reason they are having high egt's not necessarily the turbo itself. My comment earlier I should have worded it differently being on nightshift sometimes renders my brain a little slow. I have seen comparisons on turbos from matt at UFI and the garret had the highest differential temperature between pre and post turbo egt's but as you have stated are still a good turbo.

The UFI setups I have just actually priced one up myself and the kit is $2700 plus freight, that was for a TD05 18G. The kit included turbo, manifold, all piping and lines and 3" dump pipe, this is however a kit to replace a factory turbo so a full kit for a NA motor may be slightly dearer.

Yes Matt has posted up some good reading and is very interesting.
Temperature drop across the turbine is part of its operation though and the cooling and expansion of the gases is what drives it.
There are many varying opions as to what the temperature drop should be.
The information Matt posted in my view just tells us not to rely on post turbo EGT's for a indication of what is really happening.
As I said earlier I have no prefference either way for which turbo to use, but just don't waste your money modifing the HT18.
I only run the Garrett because at the time there wasn't much else around, and it was cheap.

Marty

Definitely will not b doing the HT18 thingy