Hey guys. I'm wanting to add a manifold and very small turbo to my na. The engine is in excellent condition with only 134k genuine. Wats a safe psi to run on an na motor? I was thinking about shutting the waste gate and running 6-8 psi with all new gaskets etc. But unsure if this will hurt the engine. Iv put so much into the car as it is so I dnt want to sell and buy a TT. Not sure on turbo...if td05 is to big? Will it throw the ecu out of tune? Any advice would be appreciated.
Standard TT setup on gate pressure would be best way forward. And probably cheapest. Yes it will throw the tune out of wack. Use TT tune with changes.
If i was going to do it again i would have boosted the NA donk instead of dropping the TT engine in. Your choices are(for cheap) using the stock tt setup, i paid around 450 when i was going to do this, you need to pull the engine to change the sump and whack on the turbos OR pull your mufflers off, use a Y pipe to join them into a T3 flange and whack on a GT3071 or larger with a oil return pump, tt injectors, tt ecu and water injection.
also u want the gates open so u stop spooling, with them shut u will have no way to control the boost and ultimately will destroy the engine
If you're good at finding bargains and plan it out well I would budget about $3k to add turbos to an NA car, I didn't do this but I am running 10psi through a stock NA motor in a factory TT car. This is the shopping list I can think of off the top of my head TT radiator from ASI on eBay: $200. This will need either an adaptor kit for the top brackets at US$100 from czp or some custom brackets made up. (The radiator is necessary to make room for intercooler piping.) Radiator hoses: $50 from carcraze.com.au Turbos/manifolds/dumps: $500 second hand maybe? up to $3k if you buy new, try to get the oil and water lines in good condition too otherwise there's a bunch more money there Intercoolers and piping: $100-500+? you could try get these from a wreck or there are some 'complete' kits on eBay. You could also get a bunch of the upgraded versions together from czp but that's probably more money than its worth. You will need to do some modification around the front end to try and make brackets for the pipes, or just cable tie them in. Injectors: $100-200. I think you can find second hand TT injectors for not much in the classifieds here. TT ECU: $200. I'm not how important it is to start with a TT ECU but at the least it will be less of a stuff around for the tuner. Nistune and tune: $1250. This is the standard rate the guys that did mine charge, you might be able to find better rates. Oil cooler set up: $200 - $800. I don't know if its essential but wouldn't want to set up a twin turbo without one. Other stuff: Consider any other servicing you might want to do while the engine is out, will your clutch handle more power? Have you done/do you need a major service? Is your engine loom in good condition? There are a lot of details I haven't mentioned but it gives you an idea, feel free to ask for more details on stuff and ask me for info/options on fitment of different parts, I had some trouble along the way and would happily save you repeating my mistakes
Couple extra things, the air con needs to be changed the same as the radiator does which means you'll need it regassed and may need to change your compressor/pipes. Vader's thread will probably give you some insight into fitting the piping etc. http://www.aus300zx.com/forum/showthread.php?t=329609
Thanks fists. Is definately a project. If u dont mint me asking. Was it worth doing? I'm very interested in going ahead. Thanks everyone for your replies. Been very helpful.
Do a high comp NA setup dude, after driving my RB30E+T for a bit, it's left me wondering why more people don't do it. Just get a good tune, maybe slap it on E85, and you'll be fine.
People do it, I am building a tx3 laser higher (than stock) comp. If I need a rebuild on the vg I'd be doing it for for sure at least 9.0:1 plus a more than stock boost. Should help get rid of low end lag while still be able to run a decent amount of boost, with decent sized turbos.
This really interesting. Ill following this thread too! I thought about doing a high comp turbo set up but then thought I'd be flamed! So for a standard TT set up as in everything standard. Will a healthy NA motor cope with the standard PSI whatever that actually is? or will you need to bleed off some of the vacuum pressure to the waste gate to reduce PSI? My engine is sitting around 175PSI across all cyl.
I did it purely because I had a tired TT engine that needed a major service and picked up a cheap NA wreck with a better (not perfect) engine, you should have over 200rwkw on 10 psi which is a massive improvement over an NA, if you want more power in the same car its probably the best way to go if your engine is healthy. On that note, have you had a compression test? if you have other problems in your engine you'd want to identify them first.
I haven't done a full proper test but I think my compression is at the lower end of tolerance so I'm not sure if that will affect tuning much. Standard boost is 10psi using bleed type boost solenoids with 7psi wastegates, if you go with stock turbos and boost solenoids you can install a switch for high/low boost or let a TT ECU control it, or run a mix, there are some guides around for wiring up these switches. My car seems fine with 10psi making 230rwkw through GT2554r turbos but I haven't driven it in summer heat yet so it may well explode in five months. If you go stock turbos with no solenoids and run wastegate pressure, 7psi, you can expect 150-170rwkw with a bit more confidence that its safe (if your tuner is good at their job). There is no real way to run boost below what the wastegate is set for that isn't silly and causes other problems, you would have to get aftermarket wastegate actuators with softer springs
Technology, fuels, tuning etc. Has come along way since also of the jap turbos were designed. I think the r35 gtr has a factory comp of 9.0:1
It will depend on the tune, if you run it rich with little advance you'll get high exhaust temps and NA valves will burn before TT ones would. With a sensible tune they'll be fine. For those of you that a risk averse wait a year and see if anything on mine fails.
