1 fast z Posted November 29, 2007 Share Posted November 29, 2007 Ok, I am looking to upgrade, to some more correct turbos for my Twin turbo 3.1 liter DOHC L series. I am currently running 2 stock z car T3's with a .63 ar on the hot side. I am looking for something with a t3 flange. I am looking for something that I can run 30 psi through, and will still flow enough air. Anyone have any suggestions that dont cost a ton of money. Any advice is appreciated. Quote Link to comment Share on other sites More sharing options...
BirdmanZ Posted November 29, 2007 Share Posted November 29, 2007 Throw a couple of these on there. http://www.agpturbo.com/product.php?productid=16303&cat=313&page=1 Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted November 29, 2007 Share Posted November 29, 2007 Aside from the RB25/VG30 (RB25 has smaller turbine which I think would make it better suited to twin application) `T3' based turbos, and seeing as you're somewhat handy with the fabricationer, I'd keep an eye out for the IHI VF22 turbos. They have been known to pop up on ebay for ~AUD500. Good luck, Dave Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted November 30, 2007 Share Posted November 30, 2007 I know the stock RB25DET turbo will shoot its blades off around 14psi on an RB motor. I don't think it would be a good way to go. Evan Quote Link to comment Share on other sites More sharing options...
Bernardd Posted November 30, 2007 Share Posted November 30, 2007 What kind of backpressure are you seeing Bryan? Perhaps you just need a compressor upgrade. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted November 30, 2007 Author Share Posted November 30, 2007 Well I am being told that since the z turbos dont have a 360 degree thrust washers, that they can withstand the pressure. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted November 30, 2007 Share Posted November 30, 2007 To clarify, I'm talking about backpressure in the exhaust manifolds prior to the turbine inlet. You should measure that before deciding on changing anything. IMO of course. Quote Link to comment Share on other sites More sharing options...
BirdmanZ Posted November 30, 2007 Share Posted November 30, 2007 What are you trying to do with the car? Are you going for all out power, or a more responsive setup? This is going to determine the turbos you are going to use. You say you want to run 30 psi so you can pretty much rule out using stock RB,VG or SR turbos. If your looking for something responsive than you should look into something like a pair of the smaller GT28's. Problem is, as far as I know they only come in T25 flange. You might be able to find them in T3 flange but I haven't. AFAIK the only GT28's that come in a T3 flange are the disco potatoes and they could end up being a little laggy. If lag is not so much of an issue than I would say go with the discos. Just my 2 cents. Brandon Quote Link to comment Share on other sites More sharing options...
1 fast z Posted December 7, 2007 Author Share Posted December 7, 2007 Daily driven car, with around 750 RWHP goal, at 35 PSI, or so. 25 PSI on the street. Obviously, the less the lag the better. I can modify the flanges to accept whatever I need to, thats not a problem. Just dont want to spend a TON of money. Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted December 10, 2007 Share Posted December 10, 2007 Viagra!!!! sorry i couldn't resist seen the title and bad things came to mind. I dunno about the others but i do know that if you are pushing serious power the t3 turbo from the 280zxt's wont handle the exhaust pressure and the thrust bearing will go. I had it happen to mine a few times til i could get enough cash to have the turbine housing boared out to fit a full t4 wheel. Quote Link to comment Share on other sites More sharing options...
BirdmanZ Posted December 10, 2007 Share Posted December 10, 2007 For your power goals you will probably need something like a set of what HKS calls their gt2835's. Here is a link to a kit for a skyline. http://cgi.ebay.com/ebaymotors/800HP-HKS-GT2835-x-2-Turbo-Kit-GTR-R32-R33-RB26DETT_W0QQitemZ290188116777QQihZ019QQcategoryZ33742QQssPageNameZWDVWQQrdZ1QQcmdZViewItem You could call an HKS dealer and try to get the specs for the turbos and match that to something from the garrett catalog. Brandon Quote Link to comment Share on other sites More sharing options...
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