Turbo upgrade MY05 GT

[Quick Jab]

Good to hear, Archie. Thanks for the update.

[tenyearguarante]

sorry to hijack your thread but I was searching through ebay and found this one

http://www.ebay.com.au/itm/Kinugawa-Bil ... 43d3de0af8

it appears to be the same one as what you installed but looks to have 11 blades on both turbine and comp wheel.

Just posting it up for everyone else that was interested by your mods but looking to save some cash

[JMlegacy]

Hey archie. Any MPH figure yet?

I'm disappointed with the auto and the way it eats power.

[Archie01]

No nothing yet. However the maf (g/sec) reading is around 245 if that helps.

[Archie01]

Ok results are in.

Went to Calder to get a mph last night as opposed to a time so took it easy off the line.
100.8 mph on the dot.

Looks like 180kw atw on the GotitRex dyno = 100.8 mph

For those who care for times and working out potential best times:
60ft 2.27
1/4 13.94

Weather was warm last night and im sure top mount got pretty hot idling waiting for the run.
Only 1 run unfortunately as it was packed.

[jslayz]

100 mph trap speed in a luxury barge is a good effort.
Still in 3rd gear?

Did you get your exhaust all on?

J

[Archie01]

Yeah i also believe I was the quickest and fastest of the night................................................with baby seat fitted
Got into 4th for a bit.

Previous 2.5" exhaust had redback rear muffs that looked stock from the rear unless you looked under the car to realise they werent stock so they werent too restrictive overall. I changed these to your 2 5" muffs and made the centre pipe 3". Overall benefit would have been a few killerwasps at best.

[2jz929]

That's awesome mate, make more power than me. Shame you didn't stall it up, that would have gone low 13's.

[jslayz]

Yeah i also believe I was the quickest and fastest of the night................................................with baby seat fitted
Got into 4th for a bit.

Previous 2.5" exhaust had redback rear muffs that looked stock from the rear unless you looked under the car to realise they werent stock so they werent too restrictive overall. I changed these to your 2 5" muffs and made the centre pipe 3". Overall benefit would have been a few killerwasps at best.

Tune for the low restriction exhaust?

[Archie01]

That's awesome mate, make more power than me. Shame you didn't stall it up, that would have gone low 13's.

Thanks. Thats only bc im on e85
Yeah I realised that after I got my slip and saw the 60ft time which was I was pleased with. Was thinking about having another run when at that point they wound it all up and stopped cars from going for any further runs.
Would of been interesting to see whether my mph would have improved slightly if I got a second run in with a better 60ft.

Jslayz
Yep i did that with Matt when he was here last.

Did I mention how great his tunes are

[Archie01]

Have been wondering whether there is another cost effective option for people in my position (dump pipe already done) and who dont want to change headers and up pipe to single scroll in order to upgrade turbo.

I believe the kinu td04hla-20t is the largest aftermarket bolt on turbo but where to when you have reached its limit and dont want to make too many changes in order to upgrade the turbo?

What if I already have a spare standard td04hla ts turbine housing laying around (well got the whole turbo actually)....would it be possible to get a turbo specialist to adapt a slightly larger chra and corresponding comp cover to this and for it to be cost effective?
For eg could the below be adapted to the standard turbine housing ie remove current turbine housing and adapt to standard ts turbine housing?

http://shop.mambatek.com/Ball-Bearing-G ... 2-0272.htm

This turbine wheel is 53.8mm and kinu turbine wheels are 54.0mm on the 19t i believe and 58mm on the 20t (not sure if thats a typo on their web site) but basically the turbine wheel will fit in the standard ts td04hla turbine housing and may not even require machining if it is 54.0mm factory.

IF this is possible and the machining and matching up costs say $500 by the turbo specialist then this whole exercise of upgrading turbo might end up around circa $1400 and you end up with a turbo capable of 400hp on 98 potentially?

Has anyone looked into this sort of approach and keen to share their findings?

Ps i understand dr20t just modified the ts up pipe to a single scroll in order to bolt on a 2871r so thats another option I guess but then I would also need to change dump pipe too.

[dr20t]

You can have the td04hla or kinugawa td04-19/20t twin scroll housing machined to suit a larger Chra - problem will become the flow of the housing itself and the backpressure it may create.

Remember by machining it, you are effectively reducing the turbine housing A/R.

With my old setup, what I used was a Mines twin scroll liberty / legacy uppipe that was modified by Michael from garage 88 (before he had g88) to have a single scroll t28 flange - effectively was twin scroll all the way to the turbine inlet flange.

Owen from this forum bought my old headers and uppipe (I sold them to him for dirt cheap!) along with my 2871. I think he has upgraded recently so see if he still has this potentially for sale.

Mick

[Archie01]

Thanks Mick
That was a clever approach I must say which yielded very good power too.
So assume the turbo sat pretty much close to where the standard one sat? Im curious because I was wondering whether the larger comp cover (assume 0.6?) got in the way of anything or not?

Apparently 8.5cm housing is equivalent to 0.61 AR so if no or very little machining is required then its not too bad I guess in terms of not compromising the peak hp mentioned for that turbo with 0.64 AR it comes with.

Lucky owen...might see whether he still has it

[dr20t]

Owen tonight confirmed the headers and uppipe were scrapped due to fatigue cracks forming unfortunately

The turbo sat in stock location - 0.60 comp cover with 3" inlet. That was the largest that could fit in stock location but required a custom turbo coolant reservoir to make work.

Essentially the t28 flange sat where the standard Subaru flange was. I was running an ewg so the merge collector on the mines up pipe was modified to accept the single wastegate (at the collector of the two separate pipes)

Best option in my opinion is to try have the liberty / kinugawa twin scroll housing modified to suit a larger core.

For a 2.0 litre that is daily driven but seeking up to 300awkw, I wouldn't look past the gtx2867. I believe this will provide the best compromise between spool and top end in a twin scroll setup, and with the dual avcs of the ej20y, will be very nice to drive. I still miss my old setup for street duties, notwithstanding my current setup makes 100 more kw atw and hits like a punch in the face when the turbo is spooled. Nothing compared to getting 20psi under 3000rpm on my old setup

Good luck

Mick

[Archie01]

Thanks for following up...oh well it was good while it lasted

Ok so do you think with a slightly smaller comp cover one could get away with not having to make a custom coolant reservoir? If so, then maybe the below 2867 might just fit rhe bill as its 0.57 as opposed to 0.60.
http://shop.mambatek.com/MAMBA-Bolt-On- ... 2-0065.htm

I could not find any info for the comp cover size of a stock td04hla-19t.

Yeah would be good to see another unopened ej20y making decent power from a bigger turbo without having to change so many pipes to do so *mumbles something about how much easier it is for other 4 pot turbos like sr20s and why subaru had to be a pita with the gen4LGT*