Hi all After much anticipation, input and sorting out the long awaited locally produced Z32 twin turbo upgrade bolt on kits are done................... The final kit is put together and is ready. These kits will be 100% full bolt on kits with all hoses flanges etc ready to go straight onto a zed. The kits use quality Earls fittings and nice 90 degree long radius bends to aid oil and water flow. The silicone hose is top shelf as is the quality of the fabricated brackets etc. Upon receipt of the order GCG set about modifying the standard turbo. The actuators are removed and the housings clocked to suit a zed. The Comp cover is drilled and tapped adn the adaptor flange fitted. The supplied wastegate actuator bracket is fitted as well as the new smaller style 14psi spring tension actuators. These are bench tested and setup to open at the exact same rate (no sequential turbos here) Lastly everything is double checked and the modified assembled turbos are packed up ready to send out. Once recieved its a matter of bolting them on, fitting the new oil and water lines and fittign the spacers and gaskets to the oil drain and your turbos are in and done. Very Very easy kits will cost - GT2860R .64 - 300hp $3550 GT2860R .86 - 330hp $3550 GT2860RS .64 - 330hp $3750 GT2860RS .86 - 350hp $3750 GT2871RS .64 - 370hp $3950 GT2871RS .86 - 400hp $3950 2.5 inch dumps and engine pipes $795 the set All these are confirmed and based on a GB of 5 participants. I am already getting a set out of necessity now for my build so only need four more to make it a goer. Kits are made and ready to go turbos will be order in and will be a two week turnaround. At this stage the kit is not offered with the GT2560R aka GT28R due to the adaptor being different which will require more development time and costs etc. At this time the kit is also not available separately. Considerable time and money has been put into getting these ready and the turbos need to be pulled apart so the comp cover can be drilled and tapped for the intake piping adaptor ring to be fitted. Pulling apart a new turbo will void its warranty if done personally. I have checked these out and am very happy with them and cant wait to get my kit. So hurry up and buy them already he he he
do they have any pics of one bolted up to a motor? and i am interested in one with the same or similar output as the hks2530 cheers
No not yet will have pics of mine in a few weeks all bolted up and on ready to go. At current the GT2560 T25 setup is being worked on and hope to have something going for this within 2 weeks if there is sufficient demand for it that is. New custom adaptor collars need to be made up etc and it takes a lot longer etc to get right. So could be some time off though. However the GT2860R with .64 rear housing will give very similar response on the same modded engine as the HKS kit. They are a bigger turbo being T28 versus T25 but the actual specs regarding A/R and wheel diameters etc is very similar and HKS cost about 1k more at least I have looked at them. So hopefully a bit more interest can be sort and a kit developed for the GT2560R
No Karl the GT2560 are not offered due to the turbo size being different this kit wont fit them a new kit will need to be fabricated for the T25 frame turbos.
interested in the GT2560 T25 setup Would like to express my interest in the GT2560 T25 kit, I dont mind waiting as i think this would be a much more streetable setup with an auto. Plz keep us updated on this kit Regards, Trev
Its basically a 1 peice setup with dumps incorporated into the engine pipes or some call them the test pipes. Some kits come as a separate bolt on section. these ones come as a full section. These ones are the exact same as the Tektrader GB ones as Graeme made them. Hope it helps Jason
I am so keen, but instructions from the financial controller are to the contrary I have to wait for the car to break first I am still trying damn hard, only thing that's given way so far is the centre bearing :biggrin: :zlove: . Hope these group buys will come up at least a couple of times a year
So these require the 5 bolt dumps right? Also, how long from go to whoa on the GB? IE how long do we have to get the cash together?
Yes Brad 5 bolt dumps needed. The tektrader ones are being offered with the kits for an additional amount of $795 but may be able to lower this a little if all GB participants want them. At the moment its an introductory offer and no real time limit has been put on it. So we have some time to save up a bit and get and it done. I should have my kit late next week or early the following week and will be able to take pictures etc of it being assembled onto my new engine. Should work out very nice
Dyno Graphs? Is it possible to get similar dyno graphs so that we can compare lag/hp between the turbos? We were originally looking at GT28RS with .64 - whatever that is in the new language. Are those HP ratings per turbo at the flywheel or what? Don't REALLY understand Nate
GT28RS is still GT28RS but toavoid confusion we named them all as there full names so GT28RS is actually GT2860RS. This was done as everyone was getting confused with the GT28R which is actually the GT2560R T25 smaller turbo not the GT2860R which everyone myself included thought it was. Confused yet Nate I am he he he Thats conservative HP readings capable at the flywheel so yes. As to boost response not to be confused with boost lag which is next to nothing it greatly depends on what supporting mods you have and would be impossible to get graphs comparing all the different turbos etc supporting mods play a major role in boost responsiveness more so than either the turbo A/R in many cases. Simple terms if the airflow cannot be generated or allowed to flow through the engine to spin the exhaust wheel it cannot in turn spin the comp wheel and create boost. Search twin turbo.net for various graphs but once again there is no exact match you really have to decide what you want your engine to do and almost build the engine around the selected turbos. I will be using the largest size GT2871RS with .86 rear housings for my car most likely on initially stock heads with mild port porting and port matching with a ported lower manifold on stock or pentroof type manifolds. I expect boost response to be be slow but as the car will live above 4k rpms on the track the turbos will always be spooled and ready to go anyway so not really an issue for a track car. I probably dont seem luck much help but you the buyer needs to decide on how much power they want to make etc then pick a turbo to do the job and then build the engine to suit the flow requirments of the turbo.
awesome news. any specs on the actuators. there preset for 14psi.. but what can they handle without creep?
Hey, I am keen on some new turbos for my build and I was looking at the 2860rs with .62's but I think I need some more flow than that. John is doin my heads at the moment and they are pretty seriously speced, got any recomendations as to which ones I will need for a flow thats high. What I mean is, where can I look through these turbos with all their spec so I can make a more informed decision, cause Im not sounding very informed at the moment?? cheers:biggrin:
Turbo choice as mentioned above is made purely by the purchaser I am not going to tell anyone which one they should get as final results can vary wildly depending on supporting mods. You really need to think about how much power you want and what you want to do with the car. If its a street car having the GT2871RS turbos with .86 housings will have very poor boost response and increased lag so excels and that may get the jump at the lights but when they spool up and flow 600odd hp its bye bye time. A more responsive kit would be the GT2860RS kits with the .64 housing and still makes good top end power. Most people are interested in the GT2560 turbo aka the GT28R but in my opinion its a bit of a waste of money they are only T25 size and dont flow that much more than stock to warrant the 3 odd k pricetag to get them fitted for your car. A good OEM replacement turbo but as an upgrade well I am still undecided. go to www.turbobygarrett.com.au for all the turbo specs etc and turbos explained 101 and other helpful articles on turbochargers.
You do "Most people are interested in the GT2560 turbo aka the GT28R but in my opinion its a bit of a waste of money they are only T25 size and dont flow that much more than stock to warrant the 3 odd k pricetag to get them fitted for your car. A good OEM replacement turbo but as an upgrade well I am still undecided." know the stock turbos are TB02/22 garrets. They will not out flow the stock engine @304cfm. Our engines will flow 892cfm in stock trim, half that and you get 446cfm. For a basically stock zed, which most people here would have, the GT2560R is not a waste off money. It flows 535cfm and will produce up to 330hp per turbo. Comparing the GT2560R to a journal bearing T25@405cfm turbo is floored logic. Frame and flange size is the only thing these turbos have in common. Also the GT2560R is fast spooling, not much slower than the stock pee wee's. For members not wanting to flog their cars on the track, these are not a bad choice at all.
You misread what I was trying to say so I will clarify further with the facts. True many peopel have queried me about the GT28R which I do think is a waste of money for the power output you will see from it and I will be totally honest about it. Most people want an equivalent to the legendary HKS 2530 turbos which are in fact the saem specs as the GT28RS not the GT28R aka GT2560R turbos. Specs GT28R aka GT2560R turbo Has a rating of 200 - 330hp Features include Compressor Inducer Diameter - 46.5mm Exducer Diameter - 60mm Trim 60 A/R .60 Turbine 53mm Trim 62 A/R .64 GT2860R Has a rating of 250 - 360hp Features include Compressor Inducer Diameter - 47.2mm Exducer Diameter - 60mm Trim 62 A/R .60 Turbine 53.8mm Trim 76 A/R .64 GT2860RS Has a rating of 250 - 360hp Features include Compressor Inducer Diameter - 47.2mm Exducer Diameter - 60mm Trim 62 A/R .60 Turbine 53.8mm Trim 76 A/R .64 or .86 rear housings GT2871RS Has a rating of 280 - 460hp Features include Compressor Inducer Diameter - 51.2mm Exducer Diameter - 71mm Trim 52 A/R .60 Turbine 53.8mm Trim 76 A/R .64 or .86 rear housings So as you can see the actual difference between the smaller T25 and T28 turbos is actually less than 1mm on the inducer only and considering the extra cost of around $200 or so to go from the GT2560 to the GT2860 or even the RS is well worth it IMO the engine will provide more power at less boost not be any laggier and boost response will still be excellent which is the qualities that a street driven zed should have but also be able to be wound up for the drags etc and run some good times. You will struggle to make 500rwhp with the GT2560's or spend heaps of money on engine work to do it when you can simply force more air in by using a bigger turbo. So thats what I was getting at when saying I think the GT2560's are a waste of money, not in the literal sense but in context to the other turbocharger specs etc you can get a lot more bang for your buck with very very little downsides. I should have probably gone into more detail in my earlier post. SO to summarise Yes I think the GT2560 turbos are a waste of money considering the benefits to be had from going to the T28 frame turbo that has very little different in the specs and is only a few hundred dollars more. You will make more power at lower boost and enjoy all the same characteristics of the smaller turbo in regards to boost response and lag given there is less than 1mm difference in the inducer on the compressor wheel. Hope this clarifys the issue and my stance on this topic
Ok Jayson I see your not compairing the T series to the GT series. If a kit is devolped for the GT2560R what would the price be,in relation to the GT2860RS. It should be around 6-$700 lower than the GT28060RS kit, based on the list price of these two different turbos. If the price is similar or only a little (2-300 or so less)then the 2860rs kit is better value for money. GT28R aka GT2560R turbo Has a rating of 200 - 330hp Features include Compressor Inducer Diameter - 46.5mm Exducer Diameter - 60mm Trim 60 A/R .60 Turbine 53mm Trim 62 A/R .64 GT2860RS Has a rating of 250 - 360hp Features include Compressor Inducer Diameter - 47.2mm Exducer Diameter - 60mm Trim 62 A/R .60 Turbine 53.8mm Trim 76 A/R .64 or .86 rear housings
