Suprash Posted January 30, 2009 Share Posted January 30, 2009 Right the Supra is booked in for valve stem seals, and a head overhaul, also she is drinking a fair bit of oil now days, and I suspect once again the Hybrid turbo seals are leaking again, how bad Im not sure yet, but this is the 3rd time they have been rebuilt, and from what I can tell no one really gets any decent mileage out of them, so Im not going to pay for them again. If they are leaking and something needs to be done, I would rather go back to stock and just keep the boost up high, I dont want a single, no need, 400-450bhp is enough all day long and it what I want to try and get out of them, and I dont want the Supra off the road and the headache of all the post install niggles. Plus I havent got 8k or so throw at her for that, and Im not a believer of budget kits. So stocks, Im VVT-i, will buy new, wanna run them at the top of their range, Jpsecs I know are ok at 1.3/1.4bar, but could I run UK's, and maybe run them slightly higher safely ? Thoughts ? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted January 30, 2009 Share Posted January 30, 2009 j-specs should not run above 1.2 bar. Before going single, I had my stock (euro-spec) turbos running 1.4 bar ... which was approx 420 bhp at a first guess (with e-manage, boost controller, FMIC, 550cc injectors). Quote Link to comment Share on other sites More sharing options...
Suprash Posted January 30, 2009 Author Share Posted January 30, 2009 j-specs should not run above 1.2 bar. Before going single, I had my stock (euro-spec) turbos running 1.4 bar ... which was approx 420 bhp at a first guess (with e-manage, boost controller, FMIC, 550cc injectors). They can be, just dont expect them to last 200,000 like you might get out of a set at stock boost, if I run Jspecs, I will run them 1.3 at a minimum, but I would like UK's at 1.4, maybe see how they go at 1.5 ? Quote Link to comment Share on other sites More sharing options...
Guigsy Posted January 30, 2009 Share Posted January 30, 2009 personly i wouldnt run my uk turbos at 1.4 as a minimum. jspec i certainly wouldnt run above 1.2. Anyway i doubt you could feel the difference between 1.2 and 1.3 bar Quote Link to comment Share on other sites More sharing options...
Suprash Posted January 30, 2009 Author Share Posted January 30, 2009 personly i wouldnt run my uk turbos at 1.4 as a minimum. jspec i certainly wouldnt run above 1.2. Anyway i doubt you could feel the difference between 1.2 and 1.3 bar Manifold holds it back dont it if I remember rightly, now thinking about it I wanna make 450-500bhp, maybe stocks at 1.2 and just feed it some No2, always fancied it and then up to 100bhp is easily more achievable, Im hatching a plan....lol Anyone know what price a nitros kit goes for these days, with a progressive controller ? Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 30, 2009 Share Posted January 30, 2009 I wanna make 450-500bhp Are you still on 440 injectors? Quote Link to comment Share on other sites More sharing options...
Suprash Posted January 30, 2009 Author Share Posted January 30, 2009 Are you still on 440 injectors? Lol, yeah But they can be swapped....... Quote Link to comment Share on other sites More sharing options...
Guigsy Posted January 30, 2009 Share Posted January 30, 2009 I wanna make 450-500bhp Well jspecs wont give you 400 at 1.2bar. As a comparison my UK ones with the uk spec bigger injectors/cams etc running 1.3 bar gave me just over 390 fwhp. You will need a hefty shot of no2 to get 500 out of the jspecs:p Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 30, 2009 Share Posted January 30, 2009 Lol, yeah But they can be swapped....... Then a ecu to control the larger injectors? if fitting Nos it needs a lot of fuel run with it aswell, id only run it with a mappable ecu controling it. May as well just bung that single on, if you dont go ott and use somebody that knows what they are doing to fit it then it should be fault free mate. Quote Link to comment Share on other sites More sharing options...
Suprash Posted January 30, 2009 Author Share Posted January 30, 2009 Then a ecu to control the larger injectors? if fitting Nos it needs a lot of fuel run with it aswell, id only run it with a mappable ecu controling it. May as well just bung that single on, if you dont go ott and use somebody that knows what they are doing to fit it then it should be fault free mate. Its the cost mate, I cant afford all the bits, turbo, ECU........ What about Jpecs at 1.2 with a 100 shot of nos, I dont need injectors at 1.2, Im running 1.2 and at the last dyno I was told they were about 92%, and the nos will have its own fuel feed. So have 1.2 for daily use and then some nitros for the spirited time, I still think the Supra engine is ok with 100 shot, I was running 100 shot on an NA and that didnt blink about it..... Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 30, 2009 Share Posted January 30, 2009 Id be worried about getting the jets right so it dont lean out on WOT with the nos as the nos also will make it boost higher. Quote Link to comment Share on other sites More sharing options...
Suprash Posted January 30, 2009 Author Share Posted January 30, 2009 Id be worried about getting the jets right so it dont lean out on WOT with the nos as the nos also will make it boost higher. Water Injection as a added safety ? Quote Link to comment Share on other sites More sharing options...
Ian C Posted January 31, 2009 Share Posted January 31, 2009 Water injection won't safeguard against a weak NOS mixture, an overboost situation, or detonation due to high EGTs, charge contamination caused by excessive exhaust backpressure, etc. Quote Link to comment Share on other sites More sharing options...
supra matt Posted January 31, 2009 Share Posted January 31, 2009 Ash just get phr street kit and a emu and a set of 650cc injectors cost about £4500 all in with mapping and you will have a very fast and reliable car . Quote Link to comment Share on other sites More sharing options...
cashpoint Posted January 31, 2009 Share Posted January 31, 2009 I'd be more worried about why the hybrids need rebuilding again. did 12K miles on mine at 1.4bar and they lasted, the original j-spec had 80K miles when they were replaced so either they not being rebuilt well or there is a problem else where. Quote Link to comment Share on other sites More sharing options...
Thorin Posted January 31, 2009 Share Posted January 31, 2009 Stock j-specs and run them at 1.2 bar. Fuelling is not really up to anything more and after that all you're doing is generating more heat. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted January 31, 2009 Share Posted January 31, 2009 Ash just get phr street kit and a emu and a set of 650cc injectors cost about £4500 all in with mapping and you will have a very fast and reliable car . I don't think 4500£ will be enough for the single route. Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 31, 2009 Share Posted January 31, 2009 Depending on clutch he is not far out with the spec he has listed. Quote Link to comment Share on other sites More sharing options...
benkei Posted January 31, 2009 Share Posted January 31, 2009 Are hybrids the only option to replacing the stock turbos, but keeping the TT set up? Are there not after market twins which would perform better and meet the OP's needs? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted January 31, 2009 Share Posted January 31, 2009 Depending on clutch he is not far out with the spec he has listed. agree on that ... but the crappy exchange rates does not work into the right direction Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 31, 2009 Share Posted January 31, 2009 agree on that ... but the crappy exchange rates does not work into the right direction Exchange rate is getting better by the day at the moment, PHR street kit at todays exchange is £2441.45 granted you will have a bit of delivery and import tax on that but it still leaves plenty to finish the car as ash allready has walbro pump, fmic and a full decat hks exhaust. Quote Link to comment Share on other sites More sharing options...
Suprash Posted February 1, 2009 Author Share Posted February 1, 2009 Guys, I got 2-2.5k to play with, tops, and thats including getting my valve stem seal done and head overhauled, Im not bothered about having a very fast Supra, I just want it to be fast and not have to plough any time or money into her, my drifting is far exceeding in the time and money factor now and I just want the Supra reliable and quick. Ian, so what is water injection used for then ? Supra Matt, not got anywhere near £4,500, so binned Cashpoint, Hybrids always need rebuilding, some people get some decent mileage out of them, but most or majority dont, ask anyone with Hybrids, and even if they are holding now they will let go, speaking to a garage they said the Hybrids with the MR2 are the same, none never hold, it must be differences between the two units being built from production, and then when they are stripped by hand and messed about with. There is no easy answer to why, I have had all 3 rebuilt by different places and each time they let go, and the last wast Envy. Bekei, no there is one aftermarket option for using big twins with the sequential setup, there was one company in the US that was supplying this kit on a basis that they did the install. Other then that yes, Hybrids are your only option. Jamie, you know the stock clutch can hold a good amount....... I have decided, I will go Jspec stocks, 1.3bar, after all I bet they will still seem twice more punchier then my leaking Hybrids at the moment. Aftermarket parts are just crap in all fairness, so Im going back to how Toyota intended. Quote Link to comment Share on other sites More sharing options...
chris2o2 Posted February 1, 2009 Share Posted February 1, 2009 Good luck with it , keep us up-dated please . Im interested to know how much abuse the j-spec turbo's will take before they give up the ghost. Quote Link to comment Share on other sites More sharing options...
Suprash Posted February 1, 2009 Author Share Posted February 1, 2009 Good luck with it , keep us up-dated please . Im interested to know how much abuse the j-spec turbo's will take before they give up the ghost. I prob wont know for 40,000 or so lol, these will be new units Quote Link to comment Share on other sites More sharing options...
Stonkin Posted February 2, 2009 Share Posted February 2, 2009 so Im going back to how Toyota intended. but at 1.3 bar?? Quote Link to comment Share on other sites More sharing options...
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