Tuesday, May 15, 2012 - 05:09 pm, by: Tony Nguyen(Blade4546)
Hi guys,
Looking to start up a project on the t3g's and recently purchased a kit. Goal is 350rwkw to 370rwkw+ with nice response on E85 + 1.5JZ.
Planning to purchase 2x GT2860RS CHRA and machine Comp/Exh housings to suit.
I've got a couple of concerns and couldn't find much info. Hope someone here can shed some light.
T3g exhaust housings are .49AR - Are there any known upgrade options? eg .64 gt2871r ex housing It has a 5 bolt flange to dumps and a t25 flange. Unsure if a garrett turbo housing will line up with the back to back turbo setup.
Actuator spring - Any idea what the stock spring pressure is? Upgrade options?
Manifold + Dump pipe flow - Any information on flow capabilities?
Cooler pipe + intake pipe - Worth High flowing? Or completely replace them?
Hoping to get this setup up and running soon! If anyone can point me in the right direction for great turbo rebuild services will be much appreciated. Open to any suggestions to other turbo cores I should consider.
Tuesday, May 15, 2012 - 06:32 pm, by: Tony Nguyen(Blade4546)
Yeah Kurt, Was definitely considering your Cooler/Intake pipes. Could you pm me a quote so I know what I'm up for. Do you do the intake pipe into a stock airbox as well? Or even cut the floor part to have it routed to where the stock side mount goes. (Saw one of your pics)
Tuesday, May 15, 2012 - 07:06 pm, by: Kurt Atzmuller(Kurt)
Yes can do that. I can do the airbox i have one here i can use and it's probably the easiest route to take rather than go chopping into it.
Also on the actuator concerns you have, have you seen the brand Kinagawa on ebay they make a actuator with interchangable springs. I fitted a pair of these on a pair of high flowed ct-12's last week. I really like them and going to get a pair for myself.
I'll have a think about it all and E-mail you tomorrow.
Tuesday, May 15, 2012 - 07:51 pm, by: Sebastian Grant(Saabg)
glen munro racing. Just send them to him and he will tell you what can be done to them and how much power you can make. I'll be getting him to do mine one day.
Saturday, August 04, 2012 - 10:50 am, by: Sebastian Grant(Saabg)
Yeah, hopefully I can go 2860 but we'll have to wait and see. The muppets at gcg sand blasted my housings so they have to be high flowed. Hopefully I can still get away with the smaller compressor wheel. The standard turbos already surge as it is so I really don't want to go with the bigger compressor wheel but what can you do.
Saturday, August 04, 2012 - 02:19 pm, by: Glenn Munro(Gmhigh_flow)
If your stock turbo's surge already you will have an issue with the hks ones. I can fit the gt2860 but i mentioned a gt2871 because i thought you wanted a high flow. The hks are already about a gt2860 size. For some reason lately there has been a rash of leaking turbo's showing up that have been freshly reco'ed and i am finding the seal area getting sand blasted from the reconditioning leaving horrible pitting. I don't know why all of a sudden but it shows a poor quality control in turbo shops lately. Something we should be aware of when getting turbo's rebuilt.
Sunday, August 05, 2012 - 09:04 pm, by: Sebastian Grant(Saabg)
Nice one. Cheers glen. Great to see you on this forum. I'll definitely go with the gt2860. I'm looking for no more than 330rwkw and keep it as responsive as possible.
Sunday, August 05, 2012 - 09:15 pm, by: Walter Gillmore(Cl33pa)
Welcome Glenn!
great person to deal with and only too happy to answer all my noobish questions from when i was looking to go ball bearing cartridges. would have been nice but suppliers for ceramic thrust bearings to suit the ct12a shaft sizes were non existent.
got another n00b question for ya Glenn, can you get away with drilling/ machining 'anti-surge' type holes around a high flowed ct12a comp housing? say the gt2871 cores.
Sunday, August 05, 2012 - 10:17 pm, by: Glenn Munro(Gmhigh_flow)
You can drill the antisurge slots in the housings but it is a rather big job as in time consuming.
Gt2871 are huge for the 1JZ.
The gt2871 we are talking about is going into a hks t3g turbine housings which are basicly a t25 turbine housing which get modified. I think hypergear fit them to the ct12a ,can be done with mods.
Sunday, August 05, 2012 - 10:27 pm, by: Walter Gillmore(Cl33pa)
cheers Glenn is there a surge problem when using the gt2860 cores in ct12a housings?
i missed out on a pair of apexi ball bearing RHX6 with p16r (.63) exhaust housings. on ebay. both went for $500 each! hard to find any info on them, but what i did find spoke volumes about their awesomeness as used in F1 cars, the IHI RX6 turbo. 1000hp twins gtr uses these with a p20 housing (.79?)
another question Glenn. are the T25's cast steel exhaust housing or cast iron?
ninja Edit: just found out they are high nickel content cast iron nickel rods for welding it is! pre heating and crap load of peening every half inch of weld.
Tuesday, August 21, 2012 - 11:22 pm, by: Tony Nguyen(Blade4546)
I dropped mine off to procharge in VIC. He is currently having issues re profiling the .49 rear housing to suit the gt2860RS cores and recommends I upgrade the rear housing. Not looking good at the moment as the only available rear housing is 500 a pop from UK.
Wednesday, August 22, 2012 - 02:17 pm, by: Glenn Munro(Gmhigh_flow)
The t3g are similar to the garret t25 and are 42.3mm exducer while the GT2860 are 46.9mm. They won't be a problem with the profile but are a problem with the clamp recess. They go from the normal t25 4 bolt size out to the t04 size 6 bolt. Just needs a bit of welding and tapping new threaded holes. Have done quite a few of the t25-gt28 housings.
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is there a surge problem when using the gt2860 cores in ct12a housings? 
